National Weather Service Acronyms AAA (or AAB, AAC, AAD... etc., in sequence) Amended meteorological message (a message type designator) AAL Above aerodrome level ABNDT Abundant ABNML Abnormal ABT About ABV Above Ac or AC Altocumulus AC Anticipated Convection Outlook ACC Area Control Center or area control ACCAS Altocumulus Castellanus ACCID Notification of an aircraft accident ACCUM Accumulate ACFT Aircraft ACK Acknowledge ACLT Accelerate ACLTD Accelerated ACLTG Accelerating ACLTS Accelerates ACPT Accept or accepted ACPY Accompany ACRS Across ACSL Altocumulus Standing Lenticular ACT Active or activated or activity ACTV Active ACTVTY Activity ACYC Anticyclone AD Aerodrome ADA Advisory area ADDN Addition or additional ADJ Adjacent ADL Additional ADM Administrative Messages ADQT Adequate ADQTLY Adequately ADR Advisory route ADRNDCK Adirondack ADVCT Advect ADVCTD Advected ADVCTG Advecting ADVCTN Advection ADVCTS Advects ADVIS Headwater Advisory Program ADVN Advance ADVNG Advancing ADVS Advisory service ADVY Advisory ADVYS Advisories ADZ Advise AFCT Affect AFCTD Affected AFCTG Affecting AFD Area Forecast Discussion AFDK After dark AFOS Automation of Field Operations and Services AFT After (time or place) AFTN Afternoon AGC Automatic Gain Control AGL Above ground level AGN Again AGRD Agreed AGRMT Agreement AGRS Agrees AHD Ahead AHOS-S Automatic Hydrologic Observing System - Satellite AHOS Automatic Hydrologic Observing System AHOS-T Automatic Hydrologic Observing System - Telephone AIRMET AIRman's METeorological Information AK Alaska AL Alabama ALERT Automated Local Evaluation in Real Time ALF Aloft ALG Along ALGHNY Allegheny ALQDS All quadrants ALSTG Altimeter setting ALT Altitude ALTA Alberta ALTHO Although ALTM Altimeter ALUTN Aleutian AMD Amend or amended (used to indicate amended meteorological message; message type designator) AMDD Amended AMDG Amending AMDT Amendment AMP Amplify AMPG Amplifying AMPLTD Amplitude AMS Air mass AMSL Above mean sea level AMT Amount ANLYS Analysis ANS Answer AOA At or above AOB At or Below AP Anomalous Propagation or Airport APCH Approach APCHG Approaching APCHS Approaches API Antecedent Precipitation Index APLCN Appalachian APLCNS Appalachians APPR Appear APPRG Appearing APPRS Appears APR April APRNT Apparent APRNTLY Apparently APRX Approximate or approximately APRXLY Approximately APSG After passing AQI Air Quality Statement AR Arkansas Arcus Arc Cloud ARFOR Area forecast (in aeronautical meteorological code) ARND Around ARPT Airport ARR Arrive or arrival ART Automatic Radio Theodolite Master Control Unit As or AS - Altostratus ASAP AHOS SHEF Automatic Processing System or as soon as possible ASAPTRAN The software component of ASA ASC Ascent to or ascending to ASH Assistant Service Hydrologist ASL Above Sea Level ASMD As amended ASOS Automated Surface Observing System ASSOCD Associated ASSOCN Association AT... At (followed by time at which weather change is forecast to occur) ATAD Automated Telephone Answering Device ATDTDCS Automated Tone Dial Telephone Data Collection System ATLC Atlantic ATMU Air Transportable Mobile Unit ATP... At... (time or place) ATTM At this time ATTN Attention AUG August AVBL Available or availability AVG Average AVN Aviation model AWC Aviation Weather Center AWHPS Area Wide Hydrologic Prediction System AWIPS Advanced Weather Interactive Processing System AWOS Automated Weather Observation System AWT Awaiting AZ Arizona AZM Azimuth B- Convective Inhibition B+ Convective Available Potential Energy B Blue BA Braking action BACLIN Baroclinic BAJA Baja California BASE Cloud base BATROP Barotropic BC British Columbia BCFG Fog patches BCH Beach BCKG Backing BCM Become BCMG Becoming BCMS Becomes BD Blowing dust BDA Bermuda BDRY Boundary BECMG Becoming BFDK Before dark BFR Before BGN Begin BGNG Beginning BGNS Begins BHND Behind BINOVC Breaks in overcast BKN Broken BL Blowing (followed by DU = dust, SA = sand or SN = snow) BLD Build BLDG Building BLDS Builds BLDU Blowing Dust BLDUP Buildup BLKHLS Black Hills BLKT Blanket BLKTG Blanketing BLKTS Blankets BLO Below BLSA Blowing Sand BLSN Blowing Snow BLW Below BLZD Blizzard BM Benchmark BND Bound BNDRY Boundary BNDRYS Boundaries BNTH Beneath BR Mist BRF Brief BRG Branching BRK Break BRKG Breaking BRKHIC Breaks in higher clouds BRKS Breaks BRKSHR Berkshire BRKSHRS Berkshires BRM Barometer BRN Bulk Richardson Number BRS Branches BT Bathythermograph BTL Between layers BTWN Between BWER Bounded Weak Echo Region BYD Beyond C Center (runway identification) or Degrees Celsius (Centigrade) CA Cloud-Air Lightning or California CAA Cold Air Advection CADAS Centralized Automated Data Acquisition System CAPE Convective Available Potential Energy CAPPI Constant Altitude PPI. CARIB Caribbean CASCDS Cascades CAT Category or Clear Air Turbulence CAVOK Visibility, cloud and present weather better than prescribed values or conditions CAVU Ceiling and visibility unlimited Cb or CB Cumulonimbus Cloud CBMAM Cumulonimbus Mammatus CBS Cumulonimbi Cc or CC Cirrocumulus CC Cloud-Cloud Lightning CCA (or CCB, CCC ... etc, in sequence) Corrected meteorological message (message type designator) CCL Convective Condensation Level CCLDS Clear of clouds CCLKWS Counter-clockwise CCSL Cirrocumulus Standing Lenticular CD Climatological Data CDA NOAA or NESDIS Command and Data Acquisition (CDA) Station CDC Climate Diagnostics Center CDFNT Cold front CDFNTL Cold frontal CEM Civil Emergency Message CFP Cold front passage CFS Cubic Feet per Second CG Cloud-Ground Lightning CHC Chance CHCS Chances CHG Change CHGD Changed CHGG Changing CHGS Changes CHSPK Chesapeake Ci or CI Cirrus CIG Ceiling CIGS Ceilings CIN Convective Inhibition CISK Conditional Instability of the Second Kind. CLA Clear type of ice formation CLD Cloud CLDNS Cloudiness CLDS Clouds CLEGLFGLS Great Lakes Marine Synopsis CLEGLOCLE Great Lakes Storm Outlook CLEGLSCLE Great Lakes Storm Summary CLEICEFBO Great Lakes Freeze-Up Outlook or Great Lakes Ice Outlook for the Opening of Navigation CLEICEIO Great Lakes 5-Day Ice Outlook CLKWS Clockwise CLR Clear CLRG Clearing CLRS Clears CM Centimeter CMPLX Complex CNCL Cancel CNCLD Canceled CNCLG Cancelling CNCLS Cancels CNDN Canadian CNFDC Confidence CNIF Calibration Network Information Files CNL Cancel or canceled CNTR Center CNTRD Centered CNTRL Central CNTRLN Centerline CNTRS Centers CNTY County CNTYS Counties CNVG Converge CNVGG Converging CNVGNC Convergence CNVTN Convection CNVTV Convective CNVTVLY Convectively CO Colorado COE An acronym for Corps of Engineers COM Communications COMPAR Compare COMPARD Compared COMPARG Comparing COMPARS Compares COND Conditions CONS Continuous CONSHELF Continental Shelf CONT Continue(s) or continued CONTD Continued CONTDVD Continental Divide CONTG Continuing CONTLY Continually CONTRAILS Condensation Trails CONTS Continues CONUS Continental United States. COOR Co-ordinate or co-ordination COORD Coordinate COR Correction COT At the coast COV Cover or covered or covering CPBL Capable CPC Climate Prediction Center CPHC Central Pacific Hurricane Center CR Composite Reflectivity CRC Composite Reflectivity Contour CRC Circle CRCLC Circulate CRCLN Circulation CRNR Corner CRNRS Corners CRP Critical Rainfall Probability CRS Course Cs or CS Cirrostratus CS Combined Shear CSC Combined Shear Contour CSDR Consider CSDRBL Considerable CSI Conditional Symmetric Instability CST Coast CSTL Coastal CT Connecticut or Cross Totals CTGY Category CTSKLS Catskills Cu or CU Cumulus. CUF Cumuliform CUFRA Cumulus Fractus CVR Cover CVRD Covered CVRG Covering CVRS Covers CW Cloud-Water Lightning or Continuous Wave CWA County Warning Area CWF Coastal Marine Forecasts CYC Cyclonic CYCLGN Cyclogenesis D-MAWDS Digital Marine Weather Dissemination System DABRK Daybreak DALGT Day light DAMBRK The Dam Break Forecasting Model DAPM The Data Acquisition Program Manager DATACOL The Software System that supports RFC gateway functions DATANET Hydrologic Data Network Analysis Software dB decibels DBL Double dBm A logarithmic expression for power. See decibel. dBZ A logarithmic expression for reflectivity factor. See decibel. DC District of Columbia DCP Data Collection Platform DCR Decrease DCRD Decreased DCRG Decreasing DCRGLY Decreasingly DCRS Decreases DCS Data Collection System DDS Data Distribution System. DE Delaware DEC December DEG Degree DEGS Degrees DELMARVA Delaware-Maryland-Virginia DEP Depart or departure DES Descend or descending to DEV Deviation or deviating DFCLT Difficult DFCLTY Difficulty DFNT Definite DFNTLY Definitely DFRS Differs DFUS Diffuse DGNL Diagonal DGNLLY Diagonally DIF Diffuse DIGG Digging DIR Direction DISC Discontinue DISCD Discontinued DISCG Discontinuing DISRE Disregard DISRED Disregarded DISREG Disregarding DIST Distance DIV Divert or diverting DKTS Dakota's DLA Delay or delayed DLAD Delayed DLT Delete DLTD Deleted DLTG Deleting DLY Daily DMG Damage DMGD Damaged DMGG Damaging DMNT Dominant DMSH Diminish DMSHD Diminished DMSHG Diminishing DMSHS Diminishes DNDFTS Downdrafts DNR Department of Natural Resources. DNS Dense DNSLP Downslope DNSTRM Downstream DNWND Down wind DOH Development and Operations Hydrologist DOM Domestic DP Dew point temperature or Deep DPND Deepened DPNG Deepening DPNS Deepens DPR Deeper DPTH Depth DR... Low drifting (followed by DU = dust, SA = sand or SN = snow) DRFT Drift DRFTD Drifted DRFTG Drifting DRFTS Drifts DRG During DRZL Drizzle DS Dust Storm DSA Special Tropical Disturbance Statement DSCNT Descent DSF Day-Second Feet DSIPT Dissipate DSIPTD Dissipated DSIPTG Dissipating DSIPTN Dissipation DSIPTS Dissipates DSND Descend DSNDG Descending DSNDS Descends DSNT Distant DSTBLZ Destabilize DSTBLZD Destabilized DSTBLZG Destabilizing DSTBLZN Destabilization DSTBLZS Destabilizes DSTC Distance DTG Date-time group DTRT Deteriorate or deteriorating DTRTD Deteriorated DTRTG Deteriorating DTRTS Deteriorates DU Dust DUC Dense upper cloud DUR Duration DURG During DURN Duration DVLP Develop DVLPD Developed DVLPG Developing DVLPMT Development DVLPS Develops DVRG Diverge DVRGG Diverging DVRGNC Divergence DVRGS Diverges DVV Downward vertical velocity DWNDFTS Downdrafts DWOPER Dynamic Wave Routing Model DWPNT Dewpoint DWPNTS Dewpoints DX Duplex DZ Drizzle E East or eastern longitude EB Eastbound EBND East bound ECMWF European Center for Medium-Range Weather Forecasting model EFCT Effect EHI Energy Helicity Index EIF Enhanced IFLOWS Format EL Equilibrium Level ELEV Elevation ELNGT Elongate ELNGTD Elongated ELSW Elsewhere EMBD Embedded in a layer (to indicate cumulonimbus embedded in layers of other clouds) EMBDD Embedded EMC Environmental Modeling Center EMERG Emergency EMWIN Emergency Managers Weather Information Network ENCTR Encounter ENDG Ending ENE East-northeast ENELY East-northeasterly ENERN East-northeastern ENEWD East-northeastward ENHNC Enhance ENHNCD Enhanced ENHNCG Enhancing ENHNCMNT Enhancement ENHNCS Enhances ENRT En route ENSO El Niņo Southern Oscillation ENTR Entire EPD Extended Forecast Discussion ER Here...or herewith ERD Excessive Rainfall Discussion ERL Environmental Research Laboratories ERN Eastern ERY Early ERYR Earlier ESA Electronic Systems Analyst ESE East-southeast ESELY East-southeasterly ESERN East-southeastern ESEWD East-southeastward ESF Flood Potential Outlook ESNTL Essential ESP Extended Streamflow Prediction. ESPINIT ESP Initialization Program ESS Water Supply Outlook Product EST Eastern Standard Time or Estimate or estimated or estimate (message type designator) ESTAB Establish ESTS Estimates ET Echo Tops or Electronic Technician ETA Eta model or Estimated time of arrival or estimating arrival ETC Et cetera or Echo Tops Contour ETD Estimated time of departure or estimating departure ETIM Elapsed time EV Every EVAD See VAD. EVAD Extended Velocity EVE Evening EWD Eastward EXC Except EXCLV Exclusive EXCLVLY Exclusively EXCP Except EXER Exercises or exercising or to exercise EXP Expect or expected or expecting EXPC Expect EXPCD Expected EXPCG Expecting EXTD Extend or extending EXTDD Extended EXTDG Extending EXTDS Extends EXTN Extension EXTRAP Extrapolate EXTRAPD Extrapolated EXTRM Extreme EXTRMLY Extremely EXTSV Extensive F scale See Fujita Scale. F Fahrenheit FA Aviation Area Forecast FAA Federal Aviation Administration FAH Fahrenheit FAM Familiar FAX Facsimile transmission +FC Funnel cloud (tornado or waterspout) FCEXEC A component of the NWSRFS FCST Program. FCST Forecast FCSTD Forecasted FCSTG Forecasting FCSTR Forecaster FCSTS Forecasts FDR Fire Danger Rating FEB February FEMA Federal Emergency Management Agency FEW Few FFA Flood or Flash Flood Watch FFG Flash Flood Guidance FFS Flash Flood Statement FFW Flash Flood Warning FG Fog FIC Flight information center FIG Figure FILG Filling FIR Flight information region FIRAV First available FIS Flight information service FL Flight level or Florida FLD Field FLG Flashing or Falling FLN National Flood Summary FLRY Flurry FLRYS Flurries FLS River Flood Statement FLT Flight FLUC Fluctuating or fluctuation or fluctuated FLW River Flood Warning, follow(s) or following FLWG Following FLY Fly or flying FM From FMT Format FNCTN Function FNT Front FNTGNS Frontogenesis FNTL Frontal FNTLYS Frontolysis FNTS Fronts FORNN Forenoon FOS Family of Services FOS Family of Services FPM Feet per minute FPO Flood Potential Outlook FQT Frequent FQTLY Frequently FREQ Frequency FRI Friday FRM Form FRMG Forming FRMN Formation FRONT Front (relating to weather) FROPA Frontal passage FROSFC Frontal surface FRQ Frequent FRST Frost FRWF Forecast wind factor FRZ Freeze FRZG Freezing FRZN Frozen FST First FT Feet (dimensional unit) or Terminal forecast FTHR Further FTP File Transfer Protocol FU Smoke FVRBL Favorable FWD Forward FYI For your information FZ Freezing FZDZ Freezing drizzle FZFG Freezing fog FZRA Freezing rain G Gust or Green GA Georgia GEN General GENLY Generally GEO Geographic or true GEOREF Geographical reference GF Ground fog GFS Global Forecast System GICG Glaze icing GLFALSK Gulf of Alaska GLFCAL Gulf of California GLFMEX Gulf of Mexico GLFSTLAWR Gulf of St. Lawrence GMDSS Global Maritime Distress and Safety System GND Ground GNDFG Ground fog GOES Geostationary Orbiting Environmental Satellite GOM Global Ocean Model GPS Global Positioning System GR Hail GRAD Gradient GRDL Gradual GRDLY Gradually GRID Processed meteorological data in the form of grid point values GRT Great GRTLKS Great Lakes GRTLY Greatly GRTR Greater GRTST Greatest GS Small hail and/or snow pellets GSTS Gusts GSTY Gusty GV Ground visibility HADS Hydrometeorological Automated Data System HAZ Hazard HCVIS High clouds visible HDFRZ Hard freeze HDG Heading HDRAIN An Hourly Digital Rainfall Product of the WSR-88D. HDSVLY Hudson Valley HDWND Head wind HEL Helicopter HGT Height or height above HI High, Hail Index, or Heat Index HIC Hydrologist in Charge or Hydrometeorological Information Center of the Office of Hydrology (OH) HIER Higher HIFOR High level forecast HIGH High HJ Sunrise to sunset HLF Half HLS Hurricane Local Statement HLSTO Hailstones HLTP Hilltop HLYR Haze layer aloft HMD Hemispheric Map Discussion HMT Hydrometeorological Technicians HN Sunset to sunrise HND Hundred HOD The Hydrologist on Duty or Hydrologic Operations Division of the Office of Hydrology (OH). HOL Holiday HP High Precipitation HPA Hectapascal HPC Hydrometeorological Prediction Center HPD Hourly Precipitation Data HR Hour HRL The Hydrological Research Laboratory at the Office of HRS Hours HRZN Horizon HSA Hydrologic Service Area HSB The Hydrologic Systems Branch in the Office of Hydrology (OH). HSD Heavy Snow Discussion HSF High Seas Forecasts HTC The Hydrometeorological Training Council HTG Heating HURCN Hurricane HUREP Hurricane report HV Have HVY Heavy HVYR Heavier HVYST Heaviest HWO Severe Weather Potential Statement HWVR However HWY Highway HYR Higher Hz Hertz (Hz) HZ Haze 'I' See inphase IA Iowa IAO In and out of clouds IC Ice Crystals, Diamond dust (very small ice crystals in suspension), or In-Cloud Lightning ICAO International Civil Aviation Organization ICE Icing ICG Icing ICGIC Icing in clouds ICGIP Icing in precipitation ID Identifier, identify, or Idaho IFFDP International Flight Folder Documentation Program IFLOWS The Integrated Flood Observing and Warning System IFR Instrument Flight Rules IL Illinois IMC Instrument meteorological conditions IMDT Immediate IMDTLY Immediately IMPL Impulse IMPLS Impulses IMPR Improve or improving IMPT Important IMT Immediate or immediately INBD Inbound INC In cloud INCL Include INCLD Included INCLG Including INCLS Includes INCR Increase INCRD Increased INCRG Increasing INCRGLY Increasingly INCRS Increases INDC Indicate INDCD Indicated INDCG Indicating INDCS Indicates INDEF Indefinite INFO Information INLD Inland INOP Inoperative INP If not possible INPR In progress INS Inertial Navigation System INSTBY Instability INSTF Intensify or intensifying INSTL Install or installed or installation INTCNTL Intercontinental INTL International INTMD Intermediate INTMT Intermittent INTMTLY Intermittently INTR Interior INTRMTRGN Intermountain region INTRP Interrupt or interruption or interrupted INTS Intense INTSFCN Intensification INTSFY Intensify INTSFYD Intensified INTSFYG Intensifying INTSFYS Intensifies INTST Intensity INTSTY Intensity INTVL Interval INU Inertial Navigation Unit INVOF In vicinity of INVRN Inversion IOVC In overcast IP Ice pellets IPV Improve IPVG Improving IR Infrared or Ice on runway ISA International standard atmosphere ISOL Isolated or Isolate ISOLD Isolated ITCZ Intertropical Convergence Zone J/KG Joules per Kilogram JAN January JCTN Junction JTSTR Jet stream JUL July JUN June KBDI Keetch-Byram Drought Index KFRST Killing frost KG Kilograms KLYR Smoke layer aloft KM Kilometers KMH Kilometers per hour KOCTY Smoke over city KPA Kilopascal KS Kansas KT Knots KW Kilowatts KY Kentucky LA Louisiana LABRDR Labrador LAM Logical acknowledgment (message type designator) LAN Inland LAT Latitude LCL Local LCLY Locally LCTD Located LCTMP Little change in temperature LCTN Location LDG Landing LEN Length LEVEL Level LEWP Line Echo Wave Pattern LFM Limited Fine Mesh Model LFTG Lifting LGRNG Long range LGT Light or lighting LGTD Lighted LGTR Lighter LGWV Long wave LI Lifted Index LIS Lifted indices LK Lake LKLY Likely LKS Lakes LLJ Low Level Jet LLWAS Low level wind shear alert system LLWS Low Level Wind Shear LMT Local mean time LMTD Limited LMTG Limiting LMTS Limits LN Line or Lines LO Low LOC Local or locally or location or located LONG Longitude LONGL Longitudinal LP Low Precipitation LRG Large LRGLY Largely LRGR Larger LRGST Largest LSQ Line squall LSR Local Storm Report. LST Local standard time LTD Limited LTG Lightning LTGCC Lightning cloud-to-cloud LTGCCCG Lightning cloud-to-cloud cloud-to-ground LTGCG Lightning cloud-to-ground LTGCW Lightning cloud-to-water LTGIC Lightning in cloud LTL Little LTLCG Little change LTR Later LTST Latest LV Light and variable (relating to wind) or Leaving LVL Level LVLS Levels LWR Lower LWRD Lowered LWRG Lowering LYR Layer or layered LYRD Layered LYRS Layers M Mesocyclone, Mach number (followed by figures), or Meters (preceded by figures) m2/s2 Meters squared per second squared (also m2/S2) MA Massachusetts MAN Manitoba MAP Mean Areal Precipitation or Aeronautical maps and charts MAR March MAREP Marine Reporting Program MAX Maximum MAY May MB or mb Millibars. MCC Mesoscale Convective Complex MCD Mesoscale Discussion MCDW Monthly Climatic Data of the World McIDAS Man-computer Interactive Data Access System. MCS Mesoscale Convective System MCW Modulated continuous wave MD Maryland MDFY Modify MDFYD Modified MDFYG Modifying MDL Model MDLS Models MDS Minimum Discernible Signal MDT Moderate MDTLY Moderately ME Maine MED Medium MEGG Merging MESO Mesocyclone or Mesoscale MET Meteorological or meteorology METAR Aviation routine weather report (in aeronautical meteorological code) METRO Metropolitan MEX Mexico MHKVLY Mohawk Valley MI Michigan MIC Meteorologist-In-Charge Micro-ART Microcomputer Automatic Radiotheodolite Master Control Unit MID Middle MIDN Midnight MIFG Shallow fog MIL Military MIN Minutes or Minimum MISG Missing MLCAPE Mean Layer CAPE MLLI Mean Layer Lifted Index MLLW Mean Lower Low Water MLOS Microwave Line-Of-Site MLTLVL Melting level MLW Mean Low Water MN Minnesota MNLND Mainland MNLY Mainly MNM Minimum MNT Monitor or monitoring or monitored MO Missouri MOD Meteorological Operations Division or Moderate MOGR Moderate or greater MON Above mountains or Monday MOS Model Output Statistics MOV Move or moving or movement MOVD Moved MOVG Moving MOVMT Movement MOVS Moves MPC Marine Prediction Center MPH Miles per hour MPL Max Parcel Level MRF Medium-Range Forecast model MRGL Marginal MRGLLY Marginally MRNG Morning MRTM Maritime MS Mississippi or Minus MSG Message MSL Mean Sea Level MST Most MSTLY Mostly MSTR Moisture MT Montana or Mountain MTN Mountain MTNS Mountains MTU Metric units MTW Mountain waves MUCAPE Most Unstable CAPE MULI Most Unstable Lifted Index MULT Multiple MULTILVL Multi-level MWO Meteorological watch office MX Mixed type of ice formation (white and clear) MXD Mixed N North or Refractivity NAB Not above NAT North Atlantic NATL National NAV Navigation Navtex Navigational Telex NB New Brunswick or Northbound NBFR Not before NBND Northbound NBRHD Neighborhood NC North Carolina or No change NCCF NOAA Central Computer Facility. NCDC National Climatic Data Center NCEP National Centers for Environmental Prediction NCWX No change in weather ND North Dakota NE Northeast or Nebraska NEB North-eastbound or Nebraska NEC Necessary NEG No, negative, permission not granted, or that is not correct NEGLY Negatively NELY Northeasterly NERN Northeastern NESDIS National Environmental Satellite, Data, and Information Service NEW ENG New England NEWD Northeastward NEXRAD NEXt generation of weather RADar NFDRS National Fire Danger Rating System NFLD Newfoundland NGM Nested Grid Model NGT Night NH New Hampshire NHC National Hurricane Center NIDS NEXRAD Information Dissemination Service NIL None or I have nothing to send to you NJ New Jersey NL No layers NLT Not later than NLY Northerly NM Nautical mile or New Mexico NMBR Number NMBRS Numbers NMC National Meteorological Center - the former name of NCEP NML Normal NMRS Numerous NNE North north east NNELY North-northeasterly NNERN North-northeastern NNEWD North-northeastward NNNN End of message NNW North-northwest NNWLY North-northwesterly NNWRN North-northwestern NNWWD North-northwestward NOAA National Oceanic and Atmospheric Administration NOHRSC The National Operational Hydrologic Remote Sensing Center NOPAC Northern Pacific NOSIG No significant change (used in trend-type landing forecasts) NOTAM A notice containing information concerning the establishment, condition or change in any aeronautical facility NOV November NOW Short Term Forecast NOWcast Short Term Forecast NPRS Nonpersistent NR Number or Near NRCS Natural Resources Conservation Service NRLY Nearly NRN Northern NRW Narrow Ns Nimbostratus NS Nimbostratus or Nova Scotia NSC Nil significant cloud NSH Nearshore Lake Forecast NSSFC National Severe Storms Forecast Center now known as SPC NSSL National Severe Storms Laboratory NSW Nil significant weather NTFY Notify NTFYD Notified NV Nevada NVA Negative Vorticity Advection NW Northwest NWB North-westbound NWD Northward NWFO National Weather Service Forecast Office NWLY Northwesterly NWP Numerical Weather Prediction NWR NOAA Weather Radio NWRN Northwestern NWS National Weather Service NWSH National Weather Service Headquarters NWSO National Weather Service Office NWSRFS V5.0 National Weather Service River Forecast Model Version 5 NWWS NOAA Weather Wire System NXT Next NY New York OAC Oceanic area control center OAT Outside Air Temperature OBND OBS Observe or observe or observation OBSC Obscure or obscured or obscuring OBSCD Obscured OBSCG Obscuring OBST Obstacle OCFNT Occluded front OCLD Occlude OCLDD Occluded OCLDG Occluding OCLDS Occludes OCLN Occlusion OCNL Occasional or occasionally OCNLY Occasionally OCR Occur OCRD Occurred OCRG Occurring OCRS Occurs OCT October OFC Office OFF Offshore Forecast OFP Occluded frontal passage OFSHR Offshore OH Ohio or Office of Hydrology, located in Silver Spring, MD. OHD Overhead OHP One-Hour Rainfall Rate OK Oklahoma OML Operations Manual Letter OMTNS Over mountains ONSHR Onshore OPA Opaque, white type of ice formation OPMET Operational meteorological (information) OPN Open or opening or opened OPR Operator or operate or operative or operating or operational OPS Operations OR Oregon ORGPHC Orographic ORIG Original OSV Ocean station vessel OTLK Outlook OTP On top OTR Other OTRW Otherwise OUBD Outbound OUTFLO Outflow OVC Overcast OVNGT Overnight OVR Over OVRN Overrun OVRNG Overrunning OVTK Overtake OVTKG Overtaking OVTKS Overtakes PA Pennsylvania PAC Pacific PARL Parallel PBL Planetary boundary layer PC-GRIDDS PC-Gridded Interactive Display and Diagnostic System PCD Proceed or proceeding PCPN Precipitation PD Period PDMT Predominant PDS Particularly Dangerous Situation or Periods PE Ice pellets PEN Peninsula PERM Permanent PFD QPF Discussion PGTSND Puget Sound PHYS Physical Pibal pilot-balloon observation PIBAL Pilot balloon observation PIBALS Pilot balloon reports PIREP Pilot Weather Report Pixel A contraction of "picture element" PL Ice Pellets or Sleet PLNS Plains PLS Please PLTO Plateau PLVL Present level PM Post meridian PMD Prognostic Discussion PNHDL Panhandle PNS Public Information Statement PO Dust devils PoP Precipitation Probability POS Positive POSLY Positively POSS Possible PPINE Plan Position Indicates No Echoes PPSN Present position PQPF Probabilistic Quantitative Precipitation Forecast PRBL Probable PRBLTY Probability PRBLY Probably PRECD Precede PRECDD Preceded PRECDG Preceding PRECDS Precedes PRES Pressure PRESFR Pressure falling rapidly PRESRR Pressure rising rapidly PRF Pulse Repetition Frequency PRI Primary PRIM Primary PRIN Principal PRIND Present indications are PRJMP Pressure jump PROB Probability PROC Procedure PROD Produce PRODG Producing PROG Forecast PROGD Forecasted PROGS Forecasts PRSNT Present PRSNTLY Presently PRST Persist PRSTNC Persistence PRSTNT Persistent PRSTS Persists PRT Pulse Repetition Time PRVD Provide PRVDD Provided PRVDG Providing PRVDS Provides PS Plus PSBL Possible PSBLTY Possibility PSBLY Possibly PSCZ Puget Sound Convergence Zone PSG Passing or Passage PSH Preliminary Tropical Storm Report PSN Position PSND Positioned PTCHY Patchy PTLY Partly PTNL Potential PTNLY Potentially PTNS Portions PUGET Puget Sound PUP Principle User Processor PVA Positive Vorticity Advection PVL Prevail PVLD Prevailed PVLG Prevailing PVLS Prevails PVLT Prevalent PW Precipitable Water PWS Precipitable Waters (plural) PWO Public Severe Weather Outlook PWR Power PY Spray Q' Quadrature QBI Compulsory IFR flight QFE Atmospheric pressure at aerodrome elevation (or at runway threshold) QG An abbreviation for quasigeostrophic. QN Question QPF Quantitative Precipitation Forecast QPFERD NMC excessive rainfall discussion QPFHSD NCEP Heavy Snow Discussion QPFPFD NCEP Precipitation Forecast Discussion QPFSPD NMC special precipitation discussion QSTNRY Quasistationary QUAD Quadrant QUE Quebec R Base Reflectivity, red, right, or restricted area RA Rain RADAT Radiosonde observation data RAFC Regional Area Forecast Center RAFS Regional Analysis and Forecasting System. RAG Ragged RAMSDIS RAMM Advanced Meteorological Satellite Demonstration and Interpretation System RAOB Radiosonde Observation RAOBS Radiosonde observations RCH Reach or reaching RCHD Reached RCHG Reaching RCHS Reaches RCKY Rocky RCKYS Rockies RCM Radar Coded Message RCMD Recommend RCMDD Recommended RCMDG Recommending RCMDS Recommends RCRD Record RCRDS Records RCS Reflectivity Cross Section RCV Receive RCVD Received RCVG Receiving RCVS Receives RDA Radar Data Acquisition RDC Reduce RDGG Ridging RDR Radar RDVLP Redevelop RDVLPG Redeveloping RDVLPMT Redevelopment RE Regard or Recent REC Recreation Report RECON Reconnaissance REF Reference REP Report or reporting or reporting point REPL Replace REPLD Replaced REPLG Replacing REPLS Replaces REQ Request or requested REQS Requests REQSTD Requested RES Reserve RESP Response RESTR Restrict RFC River Forecast Center RFD Rear Flank Downdraft RGD Ragged RGL Regional Model RGLR Regular RGN Region RGNS Regions RGT Right RH Relative Humidity RHI Range-Height Indicator RHINO RHI not operative RI Rhode Island RIOGD Rio Grande RL Report leaving RLBL Reliable RLTV Relative RLTVLY Relatively RMK Remark RMN Remain RMND Remained RMNDR Remainder RMNG Remaining RMNS Remains RNFL Rainfall ROBEX Regional OPMET bulletin exchange (scheme) ROC Rate of climb ROD Rate of descent ROFOR Route forecast (in aeronautical meteorological code) ROML Regional Operations Manual Letter. ROSA Remote Observing System Automation ROT Rotate ROTD Rotated ROTG Rotating ROTS Rotates RPD Rapid RPDLY Rapidly RPG Radar Product Generator RPLC Replace or replaced RPLCD Replaced RPLCG Replacing RPLCS Replaces RPRT Report RPRTD Reported RPRTG Reporting RPRTS Reports RPT Repeat RPTG Repeating RPTS Repeats RQR Require RQRD Required RQRG Requiring RQRS Requires RR Report reaching RRA (or RRB, RRC ... etc., in sequence) Delayed meteorological message (message type designator) RS Receiver station RSG Rising RSN Reason RSNG Reasoning RSNS Reasons RSTR Restrict RSTRD Restricted RSTRG Restricting RSTRS Restricts RTD Delayed (used to indicate delayed meteorological message; message type designator) RTE Route RTN Return or returned or returning RTRN Return RTRND Returned RTRNG Returning RTRNS Returns RUC Rapid Update Cycle RUF Rough RUFLY Roughly RVA River Summary RVF River Forecast RVI River Ice Statement RVR River Recreation Statement or Runway Visual Range RVS River Statement or Revise RVSD Revised RVSG Revising RVSS Revises RW Rain Shower RWY Runway S South or southern latitude SA Surface observation or Sand SACSMA Sacramento Soil Moisture Accounting Model SAO Surface observation SAOS Surface observations SAP As soon as possible SARPS Standards and Recommended Practices (ICAO) SASK Saskatchewan SAT Saturday SATFY Satisfactory SAW Preliminary Notification of Forthcoming Watch SAWRS Supplementary Aviation Weather Reporting Station SB Southbound SBCAPE CAPE calculated using a Surface based parcel SBLI Lifted Index (LI) calculated using surfaced based parcel SBND South bound SBSD Subside SBSDD Subsided SBSDNC Subsidence SBSDS Subsides Sc Stratocumulus SC South Carolina or Stratocumulus SCA Small Craft Advisory SCC Tropical Storm Summary SCND Second SCNDRY Secondary SCS Spectrum Width Cross Section or Soil Conservation Service SCSL Standing lenticular stratocumulus SCT Scattered SCTD Scattered SCTR Sector SD Storm Data or South Dakota SDF Second-Day Feet SDM Senior Duty Meteorologist or Station Duty Manual SE Southeast SEB South-eastbound SEC Second, or seconds SEL Severe Thunderstorm Watch, Tornado Watch SEL Watch Cancellation SELS SEvere Local Storms Unit SELY Southeasterly SEP September SEPN Separation SEQ Sequence SERN Southeastern SEV Severe (used e.g. to qualify icing and turbulence reports) SEWD Southeastward SFC Surface SFD State Forecast Discussion SFERICS Atmospherics SFP State Forecast Product SG Snow Grains SGFNT Significant SGFNTLY Significantly SH... Shower (followed by RA = rain, SN = snow, PE = ice pellets) SHARP Skew-T Hodograph Analysis and Research Program SHARS Subtle Heavy Rainfall Signature SHEF Standard Hydrologic Exchange Format SHEFPARS A software decoder for SHEF Data. SHFT Shift SHFTD Shifted SHFTG Shifting SHFTS Shifts SHLD Shield SHLW Shallow SHRT Short SHRTLY Shortly SHRTWV Shortwave SHRTWVS Shortwaves SHSN Snow Shower SHUD Should SHWR Shower SHWRS Showers SIERNEV Sierra Nevada SIG Signature SIGMET SIGnificant METeorlogical Information SIGWX Significant weather SIMUL Simultaneous or simultaneously SKC Sky clear SKED Schedule or scheduled SLD Solid SLGT Slight SLGTLY Slightly SLO Slow SLOLY Slowly SLOR Slower SLP Slope SLPG Sloping SLS Watch Redefining Statement SLT Sleet SLW Slow SLY Southerly SM Statute mile SMA Soil Moisture Accounting Model or Subtropical Forecast/Advisory SMK Smoke SML Small SMLR Smaller SMPDBK The Simplified Dam Break (DAMBRK) Model SMRY Summary SMS Synchronous Meteorological Satellite SMTH Smooth SMTHR Smoother SMTHST Smoothest SMTM Sometime SMW Special Marine Warning SMWHT Somewhat SN Snow SNBNK Snow bank SND Sand SNFLK Snow flake SNGL Single SNOINCR Snow increase SNOINCRG Snow increasing SNOTEL SNOw TELemetry SNR Signal-to-Noise Ratio SNST Sunset SNW Snow SNWFL Snowfall SO Southern Oscillation SOO Scientific & Operations Officer SOLAS Safety of Life at Sea Convention SOP Standard operating procedure SP Snow pellets SPA Subtropical Cyclone Public Advisory SPC Storm Prediction Center SPCLY Especially SPD Speed SPDS Speeds SPECI Aviation selected special weather report (in aeronautical meteorological code) SPECIAL Special meteorological report (in abbreviated plain language) SPENES Satellite precipitation estimate statement SPF Probability of Tropical Cyclone Conditions SPKL Sprinkle SPKLS Sprinkles SPLNS Southern Plains SPOT Spot wind SPRD Spread SPRDG Spreading SPRDS Spreads SPRL Spiral SPS Severe Weather Potential Statement or Special Weather Statement SQ Squall SQAL Squall SQLN Squall line SQSN Snow Squalls SR Sunrise SRH Storm-relative Helicity. SRM Storm Relative Mean Radial Velocity Map SRN Southern SRND Surround SRNDD Surrounded SRNDG Surrounding SRNDS Surrounds SRR Storm Relative Mean Radial Velocity Region SRY Secondary SS Sandstorm or sunset SSE South-southeast SSELY South-southeasterly SSERN South-southeastern SSEWD South-southeastward SSHP Site Specific Hydrologic Prediction System SST sea surface temperature SSW South southwest SSWLY South-southwesterly SSWRN South-southwestern SSWWD South-southwestward St or ST Stratus STAGN Stagnation STBL Stable STBLTY Stability STD Standard STDY Steady STF Stratiform STFR Stratus fractus STFRM Stratiform STG Strong STGLY Strongly STGR Stronger STGST Strongest STI Storm Tracking Information STLT Satellite STM Storm STMS Storms STN Station STN Station STNR Stationary STNRY Stationary STNS Stations STP Storm Total Precipitation SUB Substitute SUBTRPCL Subtropical SUF Sufficient SUFLY Sufficiently SUG Suggest SUGG Suggesting SUGS Suggests SUN Sunday SUP Supply SUPG Supplying SUPR Superior SUPS Supplies SUPSD Supersede SUPSDG Superseding SUPSDS Supersedes SVG Serving SVR Severe Thunderstorm Warning or Severe SVRL Several SW Southwest or Spectrum Width SWA Severe Weather Analysis (SWA) SWB South-westbound SWD Southward SWE Snow Water Equivalent SWEAT Index Severe WEAther Threat Index SWI Showalter Index SWLG Swelling SWLY Southwesterly SWO SPC Mesoscale Discussions or Convective Outlook SWODY1 Day 1 Convective Outlook SWODY2 Day 2 Convective Outlook SWOMCD SELS Mesoscale Discussion SWP Severe Weather Probability SWPC Space Weather Prediction Center SWR State Weather Roundup SWRN Southwestern SWS Severe Weather Statement SWWD Southwestward SX Stability index SXN Section SXNS Sections SYNOP Synoptic SYNS Synopsis SYS System T Thunder or Temperature T. D. Tropical Depression T.S. Tropical Storm TAF Terminal Aerodrome Forecast TAFB Tropical Analysis and Forecast Branch TAS True airspeed TC Tropical cyclone TCE Tropical Cyclone Position Estimate TCM Tropical Cyclone Forecasts/Advisory TCNTL Transcontinental TCP Public Tropical Cyclone Advisory TCU Towering Cumulus or Tropical Cyclone Update TDA Today TDO Tornado TDWR Terminal Doppler Weather Radar. TEMP Temperature TEMPO Temporary or temporarily TEN Theta-e Index TEND Trend forecast THD Thunderhead THDR Thunder THK Thick THKNG Thickening THKNS Thickness THKR Thicker THKST Thickest THN Thin THNG Thinning THNR Thinner THNST Thinnest THP Three-Hour Rainfall Rate THR Threshold THRFTR Thereafter THRU Through THRUT Throughout THSD Thousand THTN Threaten THTND Threatened THTNG Threatening THTNS Threatens THU Thursday TIL Until TIP Until past ... (place) TL... Till (followed by time by which weather change is forecast to end) TMPRY Temporary TMPRYLY Temporarily TMW Tomorrow TN Tennessee TNDCY Tendency TNDCYS Tendencies TNGT Tonight TNTV Tentative TNTVLY Tentatively TO To... (place) TOP Cloud top TOPS Tops TOR Tornado Warning TOVC Top of overcast TPC Tropical Prediction Center TPG Topping TR Track TRBL Trouble TRIB Tributary TRKG Tracking TRML Terminal TRMT Terminate TRMTD Terminated TRMTG Terminating TRMTS Terminates TRNSP Transport TRNSPG Transporting TROF Trough TROFS Troughs TROP Tropopause TRPCD Tropical continental TRPCL Tropical TRRN Terrain TRSN Transition TRW Thunderstorm TRW+ Thunderstorm with heavy rain shower TS Thunderstorm without precipitation TSB Technical Support Branch TSFR Transfer TSFRD Transferred TSFRG Transferring TSFRS Transfers TSHWR Thundershower TSHWRS Thundershowers TSIP Thundersleet TSNT Transient TSQLS Thundersqualls TSRA Thunderstorm with rain TSSN Thundersnow TSTM Thunderstorm TSTMS Thunderstorms TT Total Totals or Teletypewriter TUE Tuesday TURB Turbulence TURBC Turbulence TURBT Turbulent TVS Tornado Vortex Signature TWD Toward or Tropical Weather Discussion TWDS Towards TWEB Transcribed Weather Broadcasts Route Forecast TWI Twilight TWO Tropical Weather Outlook TWRG Towering TWS Tropical Weather Summary TX Texas TYP Type of aircraft TYPH Typhoon U/S Unserviceable UAB Until advised by ... UCP Unit Control Position UDDF Up and down drafts UFN Until further notice UIR Upper flight information region UKMET United Kingdom METeorological Agency ULJ Upper Level Jet UN Unable UNA Unable UNAVBL Unavailable UNEC Unnecessary UNKN Unknown UNL Unlimited UNREL Unreliable UNRELBL Unreliable UNRSTD Unrestricted UNSATFY Unsatisfactory UNSBL Unseasonable UNSTBL Unstable UNSTDY Unsteady UNSTL Unsettle UNSTLD Unsettled UNUSBL Unusable UPDFTS Updrafts UPR Upper UPSLP Upslope UPSTRM Upstream URG Urgent USACE U.S. Army Corps of Engineers USBL Usable USBR U.S. Bureau of Reclamation USFS U.S. Forest Service USGS U.S. Geological Survey UT Utah UTC Coordinated Universal Time UV Ultraviolet UVM Upward Vertical Motion. UVV Upward Vertical Velocity UVVS Upward vertical velocities UWNDS Upper winds V Base Velocity VA Virginia or Volcanic Ash VAD Velocity-Azimuth Display VAL In valleys VARN Variation VC Vicinity VCNTY Vicinity VCOT VFR conditions on top VCS Velocity Cross Section VCTR Vector VCY Vicinity VDUC VAS Data Utilization Center (NSSFC) VER Vertical VFR Visual Flight Rules VFY Verify VFYD Verified VFYG Verifying VFYS Verifies VHF Very high frequency [30 to 300 MHz) VIL Vertically-Integrated Liquid water VIP Very important person VIP Video Integrator and Processor VIS Visibility or Visible VLCTY Velocity VLCTYS Velocities VLNT Violent VLNTLY Violently VLY Valley VLYS Valleys VMC Visual meteorological conditions VOL Volume VOLMET Meteorological information for aircraft in flight VOMIT VIL Of the Moment In Time VOR VHF omnidirectional radio range VORT Vorticity VR Veer VRB Variable VRBL Variable VRG Veering VRISL Vancouver Island, BC VRS Veers VRT MOTN Vertical Motion VRY Very VSA By visual reference to the ground VSB Visible VSBY Visibility VSBYDR Visibility decreasing rapidly VSBYIR Visibility increasing rapidly VT Vertical Totals or Vermont VV Vertical velocity VVP Volume Velocity Processing VWP Velocity Azimuth Display (VAD) Wind Profile W White, west, or west longitude WA Washington WAA Warm Air Advection WAC World Aeronautical Chart WADL West African Disturbance Line WAFC World area forecast center WB Westbound WBND West bound WBZ Wet-Bulb Zero WCM Warning Coordination Meteorologist WDI Wind direction indicator WDLY Widely WDSPR Widespread WDSPRD Widespread WEA Weather WED Wednesday WEF With effect from or effective from WER Weak Echo Region WFO Weather Forecast Office WFOS Weather Forecast Offices WFP Warm front passage WI Within or Wisconsin WIBIS Will be issued WID Width WIE With immediate effect or effective immediately WILCO Will comply WIMS Weather Information Management System WINT Winter WINTEM Forecast upper wind and temperature for aviation WIP Work in progress WK Weak WKDAY Weekday WKEND Weekend WKN Weaken or weakening WKNG Weakening WKNS Weakens WKR Weaker WKST Weakest WL Will WLY Westerly WMO World Meteorological Organization WND Wind WNDS Winds WNW West-northwest WNWLY West-northwesterly WNWRN West-northwestern WNWWD West-northwestward WO Without WPLTO Western Plateau WRM Warm WRMFNT Warm front WRMFNTL Warm Frontal WRMG Warming WRMR Warmer WRMST Warmest WRN Western WRNG Warning WRNGS Warnings WRS Worse WS Wind shear WSFO Weather Service Forecast Office WSFOS Weather Service Forecast Offices WSHFT Wind shift WSHFTS Wind Shifts WSOM National Weather Service Operations Manual WSR-88D Weather Surveillance Radar WSR-74 A NWS Weather Surveillance Radar designed in 1974. WSR-57 A NWS Weather Surveillance Radar designed in 1957. WSTCH Wasatch Range WSW West-southwest WSWLY West-southwesterly WSWRN West-southwestern WSWWD West-southwestward WTR Water WTRS Waters WTSPT Waterspout WTSPTS Waterspouts WUD Would WV West Virginia or Water Vapor WVS Waves WW Severe Thunderstorm Watch or Tornado Watch WWA Severe Thunderstorm Watch, Tornado Watch, or Watch status reports WWAMKC Severe Thunderstorm or Tornado Watch Status Report WWD Westward WWS Severe Weather Watches WX Weather WY Wyoming X Cross XBT Abbreviation for expendable bathythermograph XCP Except XNG Crossing XPC Expect XPCD Expected XPCG Expecting XPCS Expects XPLOS Explosive XS Atmospherics XTND Extend XTNDD Extended XTNDG Extending XTRM Extreme XTRMLY Extremely Y Yellow YDA Yesterday YKN Yukon YLSTN Yellowstone YR Your z Radar Reflectivity Factor Z "Zulu" Time or Coordinated Universal Time Z dr Differential Reflectivity Ze Equivalent Radar Reflectivity ZFP Zone Forecast Product ZL Freezing drizzle ZN Zone ZNS Zones ZR Freezing rain XS Atmospherics XTND Extend XTNDD Extended XTNDG Extending