Page 5.544
Return to whittsflying
Reading Weather Contractions
A altimeter when preceding four digits (METAR)
A absolute (temperature)
A Alaskan standard time (time groups only)
A arctic (air mass)
A01 automated observation without precipitation discriminator (METAR)
A02 automated observation with precipitation discriminator (METAR)
AAWF auxiliary aviation weather facility
AC altocumulus
ACC altocumulus castellanus (ICAO)
ACCAS altocumulus castellanus
ACSL standing lenticular altocumulus
ACYC anticyclonic (right turning)
ADRNDCK Adirondack
ADV advise
ADVCTN advection
ADVY advisory
AFC area forecast center
AFDK after dark
ALF aloft
ALGHNY Allegheny
ALQDS all quadrants
ALSEC all sectors
ALTA Alberta
ALUTN Aleutian
ALWF actual wind factor
AM ante meridian
ADM amended forecast (TAF)
AMPLTD amplitude
AMS air mass
AMS American Meteorological Society
ANLYS analysis
APLCN Appalachian
AS altostratus
ASOS automated surface observing system
ATLC Atlantic
AURBO aurora borealis
AUTO automated (METAR)
AWOS automatic weather observing/reporting system
AWP aviation weather processors
B beginning of precipitation (minutes) Weather reports only.
B Bering standard time only in time groups
BACLIN baroclinic prognosis
BATROP barotropic prognosis
BC patches (METAR)
BC British Columbia
BCFG patchy fog
BCH beach
BDA Bermuda
BECMG becoming (expected between 2-digit hour and 2-digit ending hour) TAF
BFDK before dark
BINOVC breaks in overcast
BKN broken
BL between layers
BL blowing
BULD build
BLDU blowing dust
BLDUP build up
BLKHLS Black Hills
BLKT blanket
BLO below (ICAO)
BLO below clouds ((METAR)
BLSA blowing sand(METAR)
BLSN blowing snow (METAR)
BLW below (icao)
BNDRY boundary
BOVC base of overcast
BR mist (METAR)
BRF brief
BRK break
BRKHIC breaks in higher overcast
BRKSHR Berkshire
BRM barometer
BTL between layers
BTWN between
BY blowing spray (METAR) weather reports only.
C central standard time (Time groups only)
C continental (air mass)
CA clear above (PIREP only)
CAN Canada
CARIB Caribbean
CASCDS Cascades
CAVOK ceiling and visibility OK (METAR)
CAVU clear or scattered clouds and visibility over ten miles
CAWS common aviation weather sub-system
CB cumulonimbus
CBMAM cumulonimbus mammatus
CC cirrocumulus
CCLKWS counterclockwise
CCSL standing lenticular cirrocumulus
CDFNT cold front
CFP cold front passage
CHARC characteristic
CHC chance
CHSPK Chesapeake
CI cirrus
CIG ceiling
CLD cloud
CLR clear
CLRS clear and smooth
CNCL cancel
CNDN Canadian
CNVTV convective
CONFDC confidence
CONT continue or continuously
CONTDVD continental divide
CONTRAILS condensation trails
COR correction to the observation
CS cirrostratus
CST coast
CTGY category
CTSKLS Catskills
CU cumulus
CUFRA cumulus fractus
CYC cyclonic
CYCLGN cydogenesis
DABRK daybreak
DCAVU CAVU with remainder of report missing
DKTS Dakotas
DMSH diminish
DNS dense
DNSLP downslope
DNSTRM downstream
DP deep
DPNG deepening
DPTH depth
DR low drifting (METAR)
DRFT drift
DRSA low drifting sand (METAR)
DRSN low drifting snow (MEYAR)
DRZL drizzle
DS dust storm (METAR)
DSIPT dissipate
DTLN international dateline
DTRT deteriorate
DU widespread dust (METAR)
DURC during climb (PIREP)
DURD during descent (PIREP)
DVV downward vertical velocity
DWNDFTS downdrafts
DWPNT dew point
DZ drizzle (METAR)
E eastern standard time (time groups only)
E end of precipitation (minutes only in time groups only)
E equatorial (air mass)
ELNGT elongate
EMBDD embedded
EMSU environment meteorological support unit
ENERN east-northeastern (weather reports only)
ENEWD east-northeastward (weather reports only)
EOF expected operations forecast
ESERN east-southeastern (weather reports only)
ESEWD east-southeastward (weather reports only)
EXTTRAP extrapolate
EXTRM extreme
FA area forecast
FAH Fahrenheit
FEW 1 or 2 Octas (eighths) cloud coverage (MEYAR)
FC funnel cloud (METAR)
+FC tornado water spout (METAR)
FG fog (METAR)
FIBI filed but impractical to transmit
FILG filling
FINO weather report will not be filed for transmission
/FL altitude/flight level (PIREP)
FL flash advisory
FLDST flood stage
FLG falling
FLRY flurry
FLWIS flood warning issued
FR from 4 digit time hour and minutes (TAF)
FNT front
FNTGNS frontogenesis
FNTLYS frontolysis
FORNN forenoon
FRMG forming
FROPA frontal passage
FROSFC frontal surface
FRST frost
FRWF forecast wind factor
FRZ freeze
FRZLVL freezing level
FRZN frozen
FT feet
FRQ frequent
FU smoke (METAR)
RFULYR smoke layer aloft
FUOCTY smoke over city
FWC fleet weather central
FZ supercooled/freezing (METAR)
FZDZ freezing drizzle (METAR)
FZFG freezing fog (METAR)
FZRA freezing rain (METAR)
G gusts reaching (knots) weather reports only
GICG glaze icing
GLFALSK Gulf of Alaska
GLFCAL Gulf of California
GLFMEX Gulf of Mexico
GLFSTLAWR Gulf of St. Lawrence
GNDFG ground fog
GR hail greater than 1/4" (METAR)
GRAD gradient
GRBKS Grand Banks
GRDL gradual
GS small hail/snow pellets less than 1/4" (METAR)
GSTS gusts
GSTY gusty
GV ground visibility
HCVIS high clouds visible
HDFRZ hard freeze
HDSVLY Hudson Valley
HI high
HIEAT highest temperature equaled for all time
HIEFM highest temperature equaled for the month
HIESE highest temperature equaled so early
HIESL highest temperature equaled so late
HIFOR high level forecast
HITMP highest temperature
HIXAT highest temperature exceeded for all time
HIXFM highest temperature exceeded for the month
HIXSE highest temperature exceeded so early
HIXSL highest temperature exceeded so late
HLSTO hailstones
HLTP hilltop
HLYR haze layer aloft
HURCN hurricane
HUREP hurricane report
HX high index
HZ haze (METAR)
/IC icing (PIREP only)
IC ice crystals (METAR)
ICG icing
ICGIC icing in clouds
ICGICIP icing in clouds and precipitation
ICGIP icing in precipitation
IMC instrument meteorological conditions (PIREP)
IMDT immediate
INLD inland
INSTBY instability
INTR interior
INTRMTRGN inter-mountain region
INTS intense
INTSFY intensify
INVRN inversion
IOVC in overcast
IR ice on runway
ISOLD isolated
JTSTR jet stream
K cold (air mass)
KFRST killing frost
KT knots (follows wind direction/speed)
LABRDR Labrador
LCTMP little change in temperature
LDG landing
LFT lift
LGRNG long range
LGT light (PIREP)
LIFR low IFR (weather reports only)
LK lake
LLWS low level wind shear (PIREP)
LN line
LOEAT lowest temperature equaled for all time
LOEFM lowest temperature equaled for the month
LOESE lowest temperature equaled so early
LOESL lowest temperature equaled so late
LOTMP lowest temperature
LOXAT lowest temperature exceeded for all time
LOXFM lowest temperature exceeded for the month
LOXSE lowest temperature exceeded so early
LOXSL lowest temperature exceeded so late
LSR loose snow on runway
LTG lightning
LTGCA lightning cloud to air
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 clouds
LTLCG little change
LTNG lightning
LX low index
LYR layer or layered or layers
M maritime (air mass)
M in temperature field means "minus" or below zero (MEYAR)
M in RVR field, indicates Visibility less than lowest sensor value (M0600FT)
M missing (weather reports only)
M mountain standard time (time groups only)
MA map analysis
MAN Manitoba
MEGG merging
METAR Aviation routine Weather Report (ICAO)
MEX Mexico
MHKVLY Mohawk Valley
MI shallow (METAR)
MIFN midnight
MIFG patches of shallow fog no over two meters deep (METAR)
MLTLVL melting level
MMG main meteorological office
MNLD mainland
MOD moderate (PIREP)
MOGR moderate or greater
MONTR monitor
MOV move
MRGL marginal
MRNG morning
MRTM maritime
MS minus
MSTLY mostly
MSTR moisture
MTN mountain
MVFR marginal VFR
MX mixed icing type (PIREP)
MXD mixed
NB New Brunswick
NCWX no change in weather
NELY northeasterly (weather reports only)
NERN northeastern
NEW ENG New England
NFLD Newfoundland
NGT night
NL no layer
NMBR number
NNERN north-northeastern (weather reports only)
NNEWD north-northeastward (weather reports only)
NNWRN north-northwestern (weather reports only)
NNWWD northwestward (weather reports only)
NO not available (e.g. SLPNO, RVRNO)
NORIP no pilot balloon observation unless weather changes significantly
NOSPL no special observations taken (weather reports only)
NPRS nonpersistent
NS nimbostratus
NS Nova Scotia
NSCSWD no small craft or storm warnings displayed
NSW no significant weather (TAF)
NVA negative vorticity avection
NWLY northwesterly (weather reports only)
NWRN northwestern (weather reports only)
OBS observation
OBSC obscure
OCFNT occluded front
OCLD occlude
OCLN occlusion
OCNL occasional
OFP occluded frontal passage
OFSHR offshore
OMTNS over mountains
ONSHR on shore
ONT Ontario
ORGPHC orographic
OSV ocean station vessel
OTAS on top and smooth
OTLK outlook
OTP on top (PIREP)
/OV location (PIREP only)
OVC overcast
P pacific standard time (time group only)
P polar (air mass)
P in RVR field (visibility greater than highest sensor value e.g. P6000FT)
P6SM visibility greater than 6 statute miles (TAF only)
PAC Pacific
PBL probable
PCPN precipitation
PDMT predominant
PDMT predominate
PDW priority delayed weather
PE ice pellets (METAR)
PEN peninsula
PGTSND Puget Sound
PIBAL pilot balloon observation
PISE no pilot balloon observation due to sea conditions
PISO no pilot balloon observation due to snow
PIWI no pilot balloon observation due to surface winds
PK WND peak wind
PL ice pellets (METAR)
PLW plow (snow)
PNHDL panhandle
PO dust/sand whirls (METAR)
PPINA radar weather report omitted for reason different than stated
PPINE radar weather report no echoes observed
PPINO no radar weather report due to breakdown
PPIOK radar weather reports resumed
PPIOM no radar weather reports due to maintenance
PR partial (METAR)
PRBLTY probability
PRESFR pressure falling rapidly
PRESRR pressure rising rapidly
PRFG fog partial (METAR)
PRJMP pressure jump (weather reports only)
PROB30 slight chance, probability 30 percent (TAF)
PROB40 probability 40 percent (TAF)
PROG prognosis or prognostic
PRSNT present
PS plus
PSG passage
PSG passing
PSR packed snow on runway
PTCHY patchy
PTLY partly
PVA positive vorticity avection
PWING precipitation identifier not available (weather reports only)
PY spray (METAR)
QSTNRY quasi-stationary
QUE Quebec
R runway (used in RVR measurement)
RA rain (METAR)
RABA no RAWIN observation; no balloons available
RABAL Radiosonde balloon wind data
RABAR Radiosonde balloon release
RACO no RAWIN observation; communications out
RADAT Radiosonde observation data
RADNO report missing account radio failure
RAFI Radiosonde report not filed
RAFRZ Radiosonde observation freezing levels
RAHE no RAWIN observation; no gas available
RAICG Radiosonde observation icing at…
RAOB Radiosonde observation
RAPI Radiosonde observation already sent in PIBAL collection
RAREP radar weather report
RASN rain and snow (METAR)
RAVU Radiosonde analysis and verification unit
RAWE no RAWIN obs.; unfavorable weather
RAWI no RAWIN obs.; high and gusty winds
RAWIN upper winds obs.; by radio methods
RCD radar cloud detection report
RCDNA radar cloud detection report not available
RCDNE radar cloud detection report no echoes observed
RCDNO radar cloud detector inoperative breakdown until…
RCDOM radar cloud detector inoperative for maintenance until…
RCKY Rockies (mountains)
RDG ridge
RDWND radar dome wing
RESTR restrict
RGD ragged
RH relative humidity
RHINO radar echo height information not available
RHINO radar echo height indicator not operating on scan
RIOGDL Rio Grande
/RM remarks (PIREP)
RMK remark, remarks
RNFL rainfall
ROBEPS radar operating below prescribed standard
RPD rapid
RSG rising
RUF rough
RY/RWY runway
SA sand (METAR)
SASK Saskatchewan
SBSD subside
SC stratocumulus
SCSL standing lenticular stratocumulus
SCT scattered
SELS severe local storms
SELY southeasterly (weather reports only)
SERN southeastern (weather reports only)
SEV severe (ICAO)
SFERICS atmospherics
SG snow grains (METAR)
SGD solar-geophysical data
SH showers ((METAR)
SHFT shift (weather reports only)
SHGR hail showers
SHGS shallow
SHRA rain showers
SHRTLY shortly
SHSN snow showers
SHRW shower
SIERNEV Sierra Nevada
SIR snow and ice on runway
/SK sky conditions (PIREP only)
SKC sky clear (METAR)
SKC sky clear
SLD solid
SLP sea level pressure (e.g. 1013.2 reported as 132)
SLR slush on runway
SLT sleet
SM statute mile(s)
SMK smoke
SMTH smooth
SN snow (METAR)
SNBNK snowbank
SNFLK snowflake
SNOINCR snow depth increase in past hour
SNW snow
SNWFL snowfall
SP station pressure
SPECI special report (METAR)
SPKL sprinkle
SPLNS South Plains
SPRD spread
SQ squall (METAR)
SQAL squall
SQLN squall line
SS sandstorm (METAR)
SSERN south-southeastern (weather reports only)
SSEWD south-southeastward (weather reports only)
SSWRN south-southwestern (weather reports only)
SSWWD south-southwestward (weather reports only)
ST stratus
STAGN stagnation
STFRA stratus fractus
STFRM stratiform
STG strong
STM storm
STNRY stationary
SWLG swelling
SWLY southwesterly (weather reports only)
SWRN southwestern (weather reports only)
SX stability index
SXN section
SYNOP synoptic
SYNS synopsis
T trace (weather reports only)
T tropical (air mass)
/TA air temperature (PIREP)
TAF aviation terminal forecast
/TB turbulence (PIREP)
TCU towering cumulus
TEMPO temporary changes expected (between 2 digit beginning hour and 2 digit ending hour
THD thunderhead (non METAR)
THK thick
THN thin
TKOF takeoff
/TM time (PIREP)
TOP cloud top
TOVC top of overcast
/TP type (PIREP)
TPG topping
TRIB tributary
TROF trough
TROP tropopause
TRPCD tropical continental (air mass)
TRPCL tropical
TRPLYR trapping layer
TS thunderstorm (METAR)
TSGRL thunderstorm with hail (METAR)
TSGS thunderstorm with small hail (METAR)
TSHWR thundershower (non METAR)
TSPL thunderstorm with ice pellets
TSQLS thundersqualls (non-METAR)
TSRA thunderstorm with rain (METAR)
TSSA thunderstorm with duststorm or sandstorm (METAR)
TSSN thunderstorm with snow (METAR)
TSTM thunderstorm (non-METAR)
TURBC turbulence
TURBT turbulent
TWRG towering
UA routine PIREP
UAG upper atmosphere geophysics
UDDF up and down drafts
UNSBL unseasonable
UNSTBL unstable
UNSTDY unsteady
UNSTL unsettle
UP unknown precipitation (automated observations)
UPDFTS updrafts
UPR upper
UPSLP upslope
UPSTRM upstream
UUA urgent PIREP
UVV upward vertical velocity
UWNDS upper winds
V varies (wind direction and RVR)
V variable (weather reports only)
VA volcanic ash (METAR)
VC vicinity
VCFG fog in vicinity (METAR)
VIS visibility
VLCTY velocity
VLNT violent
VLY valley
VR veer
VRB variable wind direction when 6 knots or less
VRISL Vancouver Island, BC
VRT MOTN vertical motion
VSBY visibility
VSBYDR visibility decreasing rapidly
VSBRIR visibility increasing rapidly
VV vertical visibility (indefinite ceiling) (NETAR)
W warm (air mass)
WDC-1 world data centers in western Europe
WDC-2 world data centers everywhere else
WDLY widely
WDSPRD widespread
WEA weather
WFP warm front passage
WINT winter
WND wind
WNWRN west-northwestern (weather reports only)
WNWWD west-northwestward (weather reports only)
WPLTO western plateau
WR wet runway
WRM warm
WRMFNT warm front
WRNG warning
WS wind shear (In TAFs, low level not convective)
WSLHFT wind shift
WSOM weather service operations manual
WSR wet snow on runway
WSTCH watch range
WSWRN west-southwestern (weather reports only)
WSWWD west-southwestward (weather reports only)
WTR water
WTSPT water spout
WV wave
/WV wind at altitude only (PIREP only)
WW severe weather forecast
/WX flight visibility and flight weather (PIREP)
WXCON weather reconnaissance flight pilot report
XCP except
XPC expect
Y Yukon standard time (time groups only)
YKN Yukon
YLSTN Yellowstone
Z appended date-time group indicates UTC (METAR/TAF)
ZI zonal index
ZI zone of interior
ZRNO freezing rain information not available (weather reports only)
Return to Whittsflying
Continued on NOTAM Contractions