AAF - Army Air Field
AAL - above aerodrome level
AATM - at all times
ABD – aboard
ABNDT - abundant
ABNML - abnormal
ABT - about
ABV - above
AC - altocumulus
ACARS - Aircraft communication addressing & reporting system
ACCUM - accumulate
ACFT - aircraft
ACK - acknowledge
ACL - altimeter check location
ACLD - above clouds
ACLT - accelerate
ACPT - accept
ACR - air carrier
ACRBT - acrobatic
ACRS - across
ACSL - standing lenticular altocumulus
ACT - active or activated or activity
ACTG - acting
ACTV - active
ACTVT - activate
ACYC - anticyclonic
ADA - advisory area
ADDN - addition
ADF - automatic direction finder
ADIZ - air defense identification zone
ADJ - adjacent
ADQT - adequate
ADRNDCK - adirondack
ADV - advise
ADVCTN - advection
ADVN - advance
ADVY - advisory
ADVZY - advisory
AFB - Air Force Base
AFCT - affect
AFD - Airport/Facility Directory
AFDK - after dark
AFSS - Automated Flight Service Station
AFT - after
AFTN - afternoon
AGL - above ground level
AHD - ahead
AIM - Aeronautical Information Manual
AIRMET - Airmen's Meteorological Information
ALF - aloft
ALG - along
ALGHNY - Allegheny
ALNMT - alignment
ALQDS - all quadrants
ALS - approach light system
ALSEC - all sectors
ALSF-1 - standard 2400' high-intensity approach lighting system with sequenced flashers (Category I configuration)
ALSF-2 - standard 2400' high-intensity approach lighting system with sequenced flashers (Category II configuration)
ALSTG - altimeter setting
ALT - altitude
ALTA - Alberta
ALTM - altimeter
ALTN - alternate
ALUTN - Aleutian
AM - ante meridiem
AMS - air mass
AMSL - above mean sea level
ANCPT - anticipate
ANLYS - analysis
AO1 - ASOS automated observation without recipitation discriminator (rain/snow)
AO2 - ASOS automated observation with precipitation discriminator (rain/snow)
AOA - at or above
AOB - at or below
AOE - airport of entry
APCH - approach
APL - airport lights
APLCN - Appalachian
APN - Apron
APRNT - apparent
APROP - appropriate
APRX - approximate
ARB - Air Reserve Base
ARFOR - area forecast
ARINC - Aeronautical Radio, Incorporated
ARND - around
ARTC - air route traffic control
ARTCC - Air Route Traffic Control Center
AS - altostratus
ASAP - as soon as possible
ASDA - accelerate-stop distance available
ASL - above sea level
ASOS - automated surface observing system
ASPH - asphalt
ATA - actual time of arrival
ATIS - automatic terminal information service
ATLC - Atlantic
AURBO - Aurora Borealis
AUTH - authorized
AUTO - automatic
AVG - average
AVGAS - aviation gasoline
AWOS - automatic weather observing/reporting system
AWY - airway
AZM - azimuth
BACLIN - Baroclinic 
BAJA - Baja California 
BATROP - Barotropic 
BC - British Columbia 
BCH - Beach 
BCKG - Backing 
BCM - Become 
BCMG - Becoming 
BCMS - Becomes 
BD - Blowing dust 
BDA - Bermuda 
BDRY - Boundary 
BFDK - Before dark 
BFR - Before 
BGN - Begin 
BGNG - Beginning 
BGNS - Begins 
BHND - Behind 
BINOVC - Breaks in overcast 
BKN - Broken 
BLD - Build 
BLDG - Building 
BLDS - Builds 
BLDUP - Buildup 
BLKHLS - Black Hills 
BLKT - Blanket 
BLKTG - Blanketing 
BLKTS - Blankets 
BLO - Below 
BLZD - Blizzard 
BN - Blowing sand 
BND - Bound 
BNDRY - Boundary 
BNDRYS - Boundaries 
BNTH - Beneath 
BOOTHEEL - Bootheel 
BR - Branch 
BRG - Branching 
BRS - Branches 
BRF - Brief 
BRK - Break 
BRKG - Breaking 
BRKHIC - Breaks in higher clouds 
BRKS - Breaks 
BRKSHR - Berkshire 
BRKSHRS - Berkshires 
BRM - Barometer 
BS - Blowing snow 
BTWN - Between 
BYD - Beyond 
C
C - Celsius 
CA - California 
CAA - Cold Air Advection 
CARIB - Caribbean 
CASCDS - Cascades 
CAVOK - Ceiling and visibility OK 
CAVU - Ceiling and visibility unlimited 
CB - Cumulonimbus 
CBS - Cumulonimbi 
CC - Cirrocumulus 
CCLDS - Clear of clouds 
CCLKWS - Counter-clockwise 
CCSL - Standing lenticular cirrocumulus 
CDFNT - Cold front 
CDFNTL - Cold frontal 
CFP - Cold front passage 
CG - Cloud-to-ground 
CHC - Chance 
CHCS - Chances 
CHG - Change 
CHGD - Changed 
CHGG - Changing 
CHGS - Changes 
CHSPK - Chesepeake 
CI - Cirrus 
CIG - Ceiling
CIGS - Ceilings 
CLD - Cloud 
CLDNS - Cloudiness 
CLDS - Clouds 
CLKWS - Clockwise 
CLR - Clear 
CLRG - Clearing 
CLRS - Clears 
CMPLX - Complex 
CNCL - Cancel 
CNCLD - Cancelled 
CNCLG - Cancelling 
CNCLS - Cancels 
CNDN - Canadian 
CNTR - Center 
CNTRD - Centered 
CNTRLN - Centerline 
CNTRS - Centers 
CNTRL - Central 
CNTY - County 
CNTYS - Counties 
CNVG - Converge 
CNVGG - Converging 
CNVGNC - Convergence 
CNVTN - Convection 
CNVTV - Convective 
CNVTVLY - Convectively 
CNFDC - Confidence 
CO - Colorado 
COMPAR - Compare 
COMPARG - Comparing 
COMPARD - Compared 
COMPARS - Compares 
COND - Conditions 
CONT - Continue 
CONTD - Continued 
CONTLY - Continually 
CONTG - Continuing 
CONTRAILS - Condensation Trails 
CONTS - Continues 
CONTDVD - Continental Divide 
CONUS - Continental U.S. 
COORD - Coordinate 
COR - Correction 
CPBL - Capable 
CRC - Circle 
CRCLC - Circulate 
CRCLN - Circulation 
CRNR - Corner 
CRNRS - Corners 
CRS - Course 
CS - Cirrostratus 
CSDR - Consider 
CSDRBL - Considerable 
CST - Coast 
CSTL - Coastal 
CT - Connecticut 
CTGY - Category 
CTSKLS - Catskills 
CU - Cumulus 
CUFRA - Cumulus Fractus 
CVR - Cover 
CVRD - Covered 
CVRG - Covering 
CVRS - Covers 
CYC - Cyclonic 
CYCLGN - Cyclogenesis 
D
DABRK - Daybreak 
DALGT - Day light 
DBL - Double 
DC - District of Columbia 
DCR - Decrease 
DCRD - Decreased 
DCRG - Decreasing 
DCRGLY - Decreasingly 
DCRS - Decreases 
DE - Delaware 
DEG - Degree 
DEGS - Degrees 
DELMARVA - Delaware-Maryland-Virginia 
DFCLT - Difficult 
DFCLTY - Difficulty 
DFNT - Definite 
DFNTLY - Definitely 
DFRS - Differs 
DFUS - Diffuse 
DGNL - Diagonal 
DGNLLY - Diagonally 
DIGG - Digging DIR - Direction DISC - Discontinue 
DISCD - Discontinued 
DISCG - Discontinuing 
DISRE - Disregard 
DISRED - Disregarded 
DISREG - Disregarding 
DKTS - Dakotas 
DLA - Delay 
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 
DNS - Dense 
DNSLP - Downslope 
DNSTRM - Downstream 
DNWND - Down wind 
DP - Deep 
DPND - Deepened 
DPNS - Deepens 
DPR - Deeper 
DPNG - Deepening 
DPTH - Depth 
DRFT - Drift 
DRFTD - Drifted 
DRFTG - Drifting 
DRFTS - Drifts 
DRZL - Drizzle 
DSCNT - Descent 
DSIPT - Dissipate 
DSIPTD - Dissipated 
DSIPTG - Dissipating 
DSIPTN - Dissipation 
DSIPTS - Dissipates 
DSND - Descend 
DSNDG - Descending 
DSNDS - Descends 
DSNT - Distant 
DSTBLZ - Destabilize 
DSTBLZD - Destabilized 
DSTBLZG - Destablizing 
DSTBLZS - Destablizes 
DSTBLZN - Destablization 
DSTC - Distance 
DTRT - Deteriorate 
DTRTD - Deteriorated 
DTRTG - Deteriorating 
DTRTS - Deteriorates 
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 
DWPNT - Dewpoint 
DWPNTS - Dewpoints 
DX - Duplex 
E

E - East 
EBND - East bound 
EFCT - Effect 
ELNGT - Elongate 
ELNGTD - Elongated 
ELSW - Elsewhere 
EMBDD - Embedded 
EMERG - Emergency 
ENCTR - Encounter 
ENDG - Ending 
ENE - East-northeast 
ENELY - East-northeasterly 
ENERN - East-northeastern 
ENEWD - East-northeastward 
ENHNC - Enhance 
ENHNCD - Enhanced 
ENHNCG - Enhancing 
ENHNCS - Enhances 
ENHNCMNT - Enhancement 
ENTR - Entire 
ERN - Eastern 
ERY - Early 
ERYR - Earlier 
ESE - East-southeast 
ESELY - East-southeasterly 
ESERN - East-southeastern 
ESEWD - East-southeastward 
ESNTL - Essential 
ESTAB - Establish 
ESTS - Estimates 
ETA - Eta model 
ETC - Et cetera 
ETIM - Elapsed time 
EVE - Evening 
EWD - Eastward 
EXCLV - Exclusive 
EXCLVLY - Exclusively 
EXCP - Except 
EXPC - Expect 
EXPCD - Expected 
EXPCG - Expecting 
EXTD - Extend 
EXTDD - Extended 
EXTDG - Extending 
EXTDS - Extends 
EXTN - Extension 
EXTRAP - Extrapolate 
EXTRAPD - Extrapolated 
EXTRM - Extreme 
EXTRMLY - Extremely 
EXTSV - Extensive

FRMN - Formation 
FROPA - Frontal passage 
FROSFC - Frontal surface 
FRST - Frost 
FRWF - Forecast wind factor 
FRZ - Freeze 
FRZN - Frozen 
FRZG - Freezing 
FT - Feet 
FT - Terminal forecast
FTHR - Further 
FVRBL - Favorable 
FWD - Forward 
FYI - For your information

G
G - Gust 
GA - Georgia 
GEN - General 
GENLY - Generally 
GEO - Geographic 

GEOREF - Geographical reference 
GF - Ground fog
GICG - Glaze icing 
GLFALSK - Gulf of Alaska 
GLFCAL - Gulf of California 
GLFMEX - Gulf of Mexico 
GLFSTLAWR - Gulf of St. Lawrence 
GND - Ground 
GNDFG - Ground fog 
GRAD - Gradient 
GRDL - Gradual
GRDLY - Gradually 
GRT - Great 
GRTLY - Greatly 
GRTR - Greater 
GRTST - Greatest 
GRTLKS - Great Lakes 
GSTS - Gusts 
GSTY - Gusty 
GV - Ground visibility

H
HAZ - Hazard 
HCVIS - High clouds visible 
HDFRZ - Hard freeze 
HDSVLY - Hudson Valley 
HDWND - Head wind 
HGT - Height 
HI - High 
HIER - Higher 
HIFOR - High level forecast 
HLF - Half 
HLTP - Hilltop 
HLSTO - Hailstones 
HLYR - Haze layer aloft 
HND - Hundred 
HR - Hour 
HRS - Hours 
HRZN - Horizon 
HTG - Heating 
HURCN - Hurricane 
HUREP - Hurricane report 
HV - Have 
HVY - Heavy 
HVYR - Heavier 
HVYST - Heaviest 
HWVR - However 
HWY - Highway

I
IA - Iowa 
IC - Ice 
ICG - Icing 
ICGIC - Icing in clouds 
ICGIP - Icing in precipitation 
ID - Idaho 
IL - Illinois 
IMDT - Immediate 
IMDTLY - Immediately 
IMPL - Impulse 
IMPLS - Impulses 
IMPT - Important 
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 
INSTBY - Instability 
INTCNTL - Intercontinental 
INTL - International 
INTMD - Intermediate 
INTMT - Intermittent 
INTMTLY - Intermittently 
INTR - Interior 
INTRMTRGN - Intermountain region 
INTS - Intense 
INTSFCN - Intensification 
INTSFY - Intensify 
INTSFYD - Intensified 
INTSFYG - Intensifying 
INTSFYS - Intensifies 
INTSTY - Intensity 
INTVL - Interval 
INVRN - Inversion 
IOVC - In overcast 
INVOF - In vicinity of 
IP - Ice pellets 
IPV - Improve 
IPVG - Improving 
IR - Infrared 
ISOL - Isolate 
ISOLD - Isolated

J
JCTN - Junction 
JTSTR - Jet stream

K
KFRST - Killing frost 
KLYR - Smoke layer aloft 
KOCTY - Smoke over city 
KS - Kansas 
KT - Knots 
KY - Kentucky 

L
LA - Louisiana 
LABRDR - Labrador 
LAT - Latitude 
LCL - Local 
LCLY - Locally 
LCTD - Located 
LCTN - Location 
LCTMP - Little change in temperature 
LEVEL - Level 
LFM - Limited Fine Mesh Model 
LFTG - Lifting 
LGRNG - Long range 
LGT - Light 
LGTR - Lighter 
LGWV - Long wave 
LI - Lifted Index 
LIS - Lifted indices 
LK - Lake 
LKS - Lakes 
LKLY - Likely 
LLJ - Low Level Jet 
LLWS - Low Level Wind Shear 
LLWAS - Low level wind shear alert system 
LMTD - Limited 
LMTG - Limiting 
LMTS - Limits 
LN - Line 
LN - Lines 
LO - Low 
LONG - Longitude 
LONGL - Longitudnal 
LRG - Large 
LRGLY - Largely 
LRGR - Larger 
LRGST - Largest 
LST - Local standard time 
LTD - Limited 
LTG - Lightning 
LTGCC - Lightning cloud-to-cloud
LTGCG - Lightning cloud-to-ground 
LTGCCCG - Lightning cloud-to-cloud cloud-to-ground 
LTGCW - Lightning cloud-to-water 
LTGIC - Lightning in cloud 
LTL - Little 
LTLCG - Little change 
LTR - Later 
LTST - Latest 
LV - Leaving 
LVL - Level 
LVLS - Levels 
LWR - Lower 
LWRD - Lowered 
LWRG - Lowering 
LYR - Layer 
LYRD - Layered 
LYRS - Layers 

M
MA - Massachusetts 
MAN - Manitoba 
MAX - Maximum 
MB - Millibars 
MCD - Mesoscale discussion 
MD - Maryland 
MDFY - Modify 
MDFYD - Modified 
MDFYG - Modifying 
MDL - Model 
MDLS - Models 
MDT - Moderate 
MDTLY - Moderately 
ME - Maine 
MED - Medium 
MEGG - Merging 
MESO - Mesoscale 
MET - Meteorological 
METRO - Metropolitan 
MEX - Mexico 
MHKVLY - Mohawk Valley 
MI - Michigan 
MID - Middle 
MIDN - Midnight 
MIL - Military 
MIN - Minimum 
MISG - Missing 
MLTLVL - Melting level 
MN - Minnesota 
MNLND - Mainland 
MNLY - Mainly 
MO - Missouri 
MOGR - Moderate or greater 
MOV - Move 
MOVD - Moved 
MOVG - Moving 
MOVMT - Movement 
MOVS - Moves 
MPH - Miles per hour 
MRGL - Marginal 
MRGLLY - Marginally 
MRNG - Morning 
MRTM - Maritime 
MS - Mississippi 
MSG - Message 
MSL - Mean sea level 
MST - Most 
MSTLY - Mostly 
MSTR - Moisture 
MT - Montana 
MTN - Mountain 
MTNS - Mountains 
MULT - Multiple 
MULTILVL - Multi-level 
MXD - Mixed 

N
N - North 
NAB - Not above 
NAT - North Atlantic 
NATL - National 
NAV - Navigation 
NB - New Brunswick 
NBND - Northbound 
NBRHD - Neighborhood 
NC - North Carolina 
NCWX - No change in weather 
ND - North Dakota 
NE - Northeast 
NEB - Nebraska 
NEC - Necessary 
NEG - Negative 
NEGLY - Negatively 
NELY - Northeasterly 
NERN - Northeastern 
NEWD - Northeastward 
NEW ENG - New England 
NFLD - Newfoundland 
NGM - Nested Grid Model 
NGT - Night 
NH - New Hampshire 
NIL - None 
NJ - New Jersey 
NL - No layers 
NLT - Not later than 
NLY - Northerly 
NM - New Mexico 
NMBR - Number 
NMBRS - Numbers 
NMC - National Meteorological Center 
NML - Normal 
NMRS - Numerous 
NNE - North-northeast 
NNELY - North-northeasterly 
NNERN - North-northeastern 
NNEWD - North-northeastward 
NNW - North-northwest 
NNWLY - North-northwesterly 
NNWRN - North-northwestern 
NNWWD - North-northwestward 
NNNN - End of message 
NOAA - National Oceanic and Atmospheric Administration 
NOPAC - Northern Pacific 
NPRS - Nonpersistent 
NR - Near 
NRLY - Nearly 
NRN - Northern 
NRW - Narrow 
NS - Nova Scotia 
NTFY - Notify 
NTFYD - Notified 
NV - Nevada 
NVA - Negative vorticity advection 
NW - Northwest 
NWD - Northward 
NWLY - Northwesterly 
NWRN - Northwestern 
NWS - National Weather Service 
NY - New York 
NXT - Next 

O
OAT - Outside Air Temperature OBND - Outbound 
OBS - Observation 
OBSC - Obscure 
OBSCD - Obscured 
OBSCG - Obscuring 
OCFNT - Occluded front 
OCLD - Occlude 
OCLDS - Occludes 
OCLDD - Occluded 
OCLDG - Occluding 
OCLN - Occlusion 
OCNL - Occasional 
OCNLY - Occasionally 
OCR - Occur 
OCRD - Occurred 
OCRG - Occurring 
OCRS - Occurs 
OFC - Office 
OFP - Occluded frontal passage 
OFSHR - Offshore 
OH - Ohio 
OK - Oklahoma 
OMTNS - Over mountains 
ONSHR - On shore 
OR - Oregon 
ORGPHC - Orographic 
ORIG - Original 
OSV - Ocean station vessel 
OTLK - Outlook 
OTP - On top 
OTR - Other 
OTRW - Otherwise 
OUTFLO - Outflow 
OVC - Overcast 
OVNGT - Overnight 
OVR - Over 
OVRN - Overrun 
OVRNG - Overrunning 
OVTK - Overtake 
OVTKG - Overtaking 
OVTKS - Overtakes 

P
PA - Pennsylvania 
PAC - Pacific 
PBL - Planetary boundary layer 
PCPN - Precipitation 
PD - Period 
PDS - Periods 
PDMT - Predominant 
PEN - Peninsula 
PERM - Permanent 
PGTSND - Puget Sound 
PHYS - Physical 
PIBAL - Pilot balloon observation 
PIBALS - Pilot balloon reports 
PIREP - Pilot weather report 
PIREPS - Pilot weather reports 
PLNS - Plains 
PLS - Please 
PLTO - Plateau 
PM - Post meridian 
PNHDL - Panhandle 
POS - Positive 
POSLY - Positively 
PPINE - PPI no echoes 
PPSN - Present position 
PRBL - Probable 
PRBLY - Probably 
PRBLTY - Probability 
PRECD - Precede 
PRECDD - Preceded 
PRECDG - Preceding 
PRECDS - Precedes 
PRES - Pressure 
PRESFR - Pressure falling rapidly 
PRESRR - Pressure rising rapidly 
PRIM - Primary 
PRIN - Principal 
PRIND - Present indications are 
PRJMP - Pressure jump 
PROC - Procedure 
PROD - Produce 
PRODG - Producing 
PROG - Forecast 
PROGD - Forecasted 
PROGS - Forecasts 
PRSNT - Present 
PRSNTLY - Presently 
PRST - Persist 
PRSTS - Persists 
PRSTNC - Persistence 
PRSTNT - Persistent 
PRVD - Provide 
PRVDD - Provided 
PRVDG - Providing 
PRVDS - Provides 
PS - Plus 
PSBL - Possible 
PSBLY - Possibly 
PSBLTY - Possiblity 
PSG - Passage 
PSN - Position 
PSND - Positioned 
PTCHY - Patchy 
PTLY - Partly 
PTNL - Potential 
PTNLY - Potentially 
PTNS - Portions 
PUGET - Puget Sound 
PVA - Positive vorticity advection 
PVL - Prevail 
PVLD - Prevailed 
PVLG - Prevailing 
PVLS - Prevails 
PVLT - Prevalent 
PWR - Power 

Q
QN - Question 
QPFERD - NMC excessive rainfall discussion 
QPFHSD - NMC heavy snow discussion 
QPFSPD - NMC special precipitation discussion 
QSTNRY - Quasistationary 
QUAD - Quadrant 
QUE - Quebec
 

RLBL - Reliable 
REPL - Replace 
REPLD - Replaced
REPLG - Replacing 
REPLS - Replaces 
REQ - Request 
REQS - Requests 
REQSTD - Requested
RESP - Response 
RESTR - Restrict 
RGD - Ragged 
RGLR - Regular 
RGN - Region 
RGNS - Regions 
RH - Relative Humidity 
RIOGD - Rio Grande 
RLTV - Relative 
RLTVLY - Relativily 
RMN - Remain 
RMND - Remained 
RMNDR - Remainder 
RMNG - Remaining 
RMNS - Remains 
RNFL - Rainfall 
ROT - Rotate 
ROTD - Rotated 
ROTG - Rotating 
ROTS - Rotates   
RPD - Rapid 
RPDLY - Rapidly 
RPLC - Replace 
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 
RS - Receiver station 
RSG - Rising 
RSN - Reason 
RSNG - Reasoning 
RSNS - Reasons 
RSTR - Restrict 
RSTRD - Restricted 
RSTRG - Restricting 
RSTRS - Restricts 
RTRN - Return 
RTRND - Returned 
RTRNG - Returning 
RTRNS - Returns 
RUF - Rough 
RUFLY - Roughly 
RVS - Revise 
RVSD - Revised 
RVSG - Revising 
RVSS - Revises 
RW - Rain shower

S
S - South 
SA - Surface observation 
SAO - Surface observation 
SAOS - Surface observations 
SASK - Saskatchewan 
SATFY - Satisfactory 
SBND - South bound 
SBSD - Subside 
SBSDD - Subsided 
SBSDNC - Subsidence 
SBSDS - Subsides 
SC - South Carolina 
SCND - Second 
SCNDRY - Secondary 
SCSL - Standing lenticular stratocumulus 
SCT - Scatter 
SCTD - Scattered 
SCTR - Sector 
SD - South Dakota 
SE - Southeast 
SEC - Second 
SELS - Severe Local Storms Unit 
SELY - Southeasterly 
SEPN - Separation 
SEQ - Sequence 
SERN - Southeastern 
SEWD -Southeastward 
SFC - Surface 
SFERICS - Atmospherics 
SG - Snow grains 
SGFNT - Significant 
SGFNTLY - Significantly 
SHFT - Shift 
SHFTD - Shifted 
SHFTG - Shifting 
SHFTS - Shifts 
SHLD - Shield 
SHLW - Shallow 
SHRT - Short 
SHRTLY - Shortly 
SHRTWV - Shortwave 
SHRTWVS - Shortwaves 
SHUD - Should 
SHWR - Shower 
SHWRS - Showers 
SIERNEV - Sierra Nevada 
SIG - Signature 
SIGMET - Significant meteorological information 
SIMUL - Simultaneous 
SKC - Sky clear 
SKED - Schedule 
SLD - Solid 
SLGT - Slight 
SLGTLY - Slightly 
SLO - Slow 
SLOLY - Slowly 
SLOR - Slower 
SLP - Slope 
SLPG - Sloping 
SLT - Sleet 
SLY - Southerly 
SM - Statute mile 
SMK - Smoke 
SML - Small 
SMLR - Smaller 
SMRY - Summary 
SMS - Synchronus meteorological satellite 
SMTH - Smooth 
SMTHR - Smoother 
SMTHST - Smoothest 
SMTM - Sometime 
SMWHT - Somewhat 
SNBNK - Snow bank 
SND - Sand 
SNFLK - Snow flake 
SNGL - Single 
SNOINCR - Snow increase 
SNOINCRG - Snow increasing 
SNST - Sunset 
SNW - Snow 
SNWFL - Snowfall 
SOP - Standard operating procedure 
SP - Snow pellets 
SPCLY - Especially 
SPD - Speed 
SPDS - Speeds 
SPENES - Satellite precipitation estimate statement 
SPKL - Sprinkle 
SPKLS - Sprinkles 
SPLNS - Southern Plains 
SPRD - Spread 
SPRDG - Spreading 
SPRDS - Spreads 
SPRL - Spiral 
SQAL - Squall 
SQLN - Squall line 
SR - Sunrise 
SRN - Southern 
SRND - Surround 
SRNDD - Surrounded 
SRNDG - Surrounding 
SRNDS - Surrounds 
SS - Sunset 
SSE - South-southeast 
SSELY - South-southeasterly 
SSERN - South-southeastern 
SSEWD - South-southeastward 
SSW - South-southwest 
SSWLY - South-southwesterly 
SSWRN - South-southwestern 
SSWWD - South-southwestward 
ST - Stratus 
STAGN - Stagnation 
STBL - Stable 
STBLTY - Stability 
STD - Standard 
STDY - Steady 
STFR - Stratus fractus 
STFRM - Stratiform 
STG - Strong 
STGLY - Strongly 
STGR - Stronger 
STGST - Strongest 
STLT - Satellite 
STM - Storm 
STMS - Storms 
STN - Station 
STNS - Stations 
STNRY - Stationary 
SUB - Substitute 
SUBTRPCL - Subtropical 
SUF - Sufficient 
SUFLY - Sufficiently 
SUG - Suggest 
SUGG - Suggesting 
SUGS - Suggests 
SUP - Supply 
SUPG - Supplying 
SUPR - Superior 
SUPS - Supplies 
SUPSD - Supersede 
SUPSDG - Superseding 
SUPSDS - Supersedes 
SVG - Serving 
SVR - Severe 
SVRL - Several 
SW - Southwest 
SWD - Southward 
SWWD - Southwestward 
SW- - Light snow shower 
SW+ - Heavy snow shower 
SWLG - Swelling 
SWLY - Southwesterly 
SWOMCD - SELS Mesoscale Discussion 
SWRN - Southwestern 
SX - Stability index 
SXN - Section 
SXNS - Sections 
SYNOP - Synoptic 
SYNS - Synopsis 
SYS - System 

T
T - Thunder 
TCNTL - Transcontinental 
TCU - Towering cumulus 
TDA - Today 
TEMP - Temperature 
THD - Thunderhead 
THDR - Thunder 
THK - Thick 
THKNG - Thickening 
THKNS - Thickness 
THKR - Thicker 
THKST - Thickest 
THN - Thin 
THNG - Thinning 
THNR - Thinner 
THNST - Thinnest 
THR - Threshold 
THRFTR - Thereafter 
THRU - Through 
THRUT - Throughout 
THSD - Thousand 
THTN - Threaten 
THTND - Threatened 
THTNG - Threatening 
THTNS - Threatens 
TIL - Until 
TMPRY - Temporary 
TMPRYLY - Temporarilly
TMW - Tomorrow 
TN - Tennessee 
TNDCY - Tendency 
TNDCYS - Tendencies 
TNGT - Tonight 
TNTV - Tentative 
TNTVLY - Tentatively 
TOPS - Tops 
TOVC - Top of overcast 
TPG - Topping 
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 
TSFR - Transfer 
TSFRD - Transfered 
TSFRG - Transfering 
TSFRS - Transfers 
TSHWR - Thundershower 
TSHWRS - Thundershowers 
TSNT - Transient 
TSQLS - Thundersqualls 
TSTM - Thunderstorm 
TSTMS - Thunderstorms 
TS - Thunderstorm with snow 
TS+ - Thunderstorm with heavy snow 
TSW - Thunderstorm with snow showers 
TSW+ - Thunderstorm with heavy snow showers 
TURBC - Turbulence 
TURBT - Turbulent 
TWD - Toward 
TWDS - Towards 
TWI - Twilight 
TWRG - Towering 
TX - Texas 

U
UDDF - Up and down drafts 
UN - Unable 
UNAVBL - Unavailable 
UNEC - Unnecessary 
UNKN - Unknown 
UNL - Unlimited 
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 
USBL - Usable 
UT - Utah 
UVV - Upward vertical velocity 
UVVS - Upward vertical velocities 
UWNDS - Upper winds 

V
VA - Virginia 
VARN - Variation 
VCNTY - Vicinity 
VCOT - VFR conditions on top 
VCTR - Vector 
VDUC - VAS Data Utilization Center (NSSFC) 
VFY - Verify 
VFYD - Verified 
VFYG - Verifying 
VFYS - Verifies 
VLCTY - Velocity 
VLCTYS - Velocities 
VLNT - Violent 
VLNTLY - Violently 
VLY - Valley 
VLYS - Valleys 
VMC - Visual meteorological conditions 
VOL - Volume 
VORT - Vorticity 
VR - Veer 
VRG - Veering 
VRBL - Variable 
VRISL - Vancouver Island, BC 
VRS - Veers 
VRT MOTN - Vertical Motion 
VRY - Very 
VSB - Visible 
VSBY - Visibility 
VSBYDR - Visibility decreasing rapidly 
VSBYIR - Visibility increasing rapidly 
VT - Vermont 
VV - Vertical velocity 

W
W - West 
WA - Washington 
WAA - Warm Air Advection 
WBND - West bound 
WDLY - Widely 
WDSPRD - Widespread
WEA - Weather 
WFO - Weather Forecast Office 
WFOS - Weather Forecast Offices 
WFP - Warm front passage 
WI - Wisconsin 
WIBIS - Will be issued 
WINT - Winter 
WK - Weak 
WKDAY - Weekday 
WKEND - Weekend 
WKNG - Weakening 
WKNS - Weakens 
WKR - Weaker 
WKST - Weakest 
WKN - Weaken 
WL - Will 
WLY - Westerly 
WND - Wind 
WNDS - Winds 
WNW - West-northwest 
WNWLY - West-northwesterly 
WNWRN - West-northwestern 
WNWWD - West-northwestward 
WO - Without 
WPLTO - Western Plateau 
WRM - Warm 
WRMG - Warming 
WRN - Western 
WRMR - Warmer 
WRMST - Warmest 
WRMFNT - Warm front 
WRMFNTL - Warm Frontal 
WRNG - Warning 
WRNGS - Warnings 
WRS - Worse 
WSHFT - Wind shift 
WSHFTS - Wind Shifts 
WSFO - Weather Service Forecast Office 
WSFOS - Weather Service Forecast Offices 
WSO - Weather Service Office 
WSOS - Weather Service Offices 
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 
WVS - Waves 
WW - Severe Weather Watch 
WWAMKC - Status Report 
WWD - Westward 
WWS - Severe Weather Watches 
WX - Weather 
WY - Wyoming 

X
XCP - Except 
XPC - Expect 
XPCD - Expected 
XPCG - Expecting 
XPCS - Expects 
XPLOS - Explosive 
XTND - Extend 
XTNDD - Extended 
XTNDG - Extending 
XTRM - Extreme 
XTRMLY - Extremely 

Y
YDA - Yesterday 
YKN - Yukon 
YLSTN - Yellowstone