NOTAM CONTRACTIONS. Clearance Delivery Approach Light System. Code of Federal Regulations Altimeter Setting

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Pauline Johns
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1 Notices to Airmen s NOTA CONTRACTIONS This list contains most of the commonly used contractions currently in use in Notices to Airmen (NOTAS) and the standard aviation weather products, such as TAR/TAF, area forecasts, SIGTs, AIRTs, etc. ABN ABV Airport Beacon Above A BRG BYD Bearing Beyond ACC Area Control Center (ARTCC) C ACCU Accumulate CAAS Class A Airspace ACFT Aircraft CAT Category ACR Air Carrier CBAS Class B Airspace ACT Active CBSA Class B Surface Area ADJ Adjacent CCAS Class C Airspace ADZD Advised CCLKWS Counterclockwise AFD Airport Facility Directory CCSA Class C Surface Area AGL Above ground level CD Clearance Delivery ALS Approach Light System CDAS Class D Airspace ALT Altitude CDSA Class D Surface Area ALT Altimeter CAS Class Airspace ALTN Alternate CSA Class Surface Area ALTNLY Alternately CFR Code of Federal Regulations ALSTG Altimeter Setting CGAS Class G Airspace ADT Amendment CHG Change AGR Airport anager CIG Ceiling AOS Automatic eteorological Observing System CK Check AP Airport CL Centerline APCH Approach CLKWS Clockwise AP LGT Airport Lights CLR Clearance, clear(s), cleared to APP Approach control CLSD Closed ARFF Aircraft Rescue & Fire Fighting CB Climb ARR Arrive, arrival CSND Commissioned ASOS Automated Surface Observing System CNL Cancel ASPH Asphalt CO Communications ATC Air Traffic Control CONC Concrete ATCSCC Air Traffic Control System Command Center CPD Coupled ATIS Automatic Terminal Information Service CRS Course AUTH Authority CTC Contact AUTOB Automatic Weather Reporting System CTL Control AVBL Available AWOS AWY AZ Automatic Weather Observing/Reporting System Airway Azimuth DALGT DCSND DCT D Daylight Decommissioned Direct B DGS Degrees BA FAIR Braking action fair DP Depart/Departure BA NIL Braking action nil DPPROC Departure procedures BA POOR Braking action poor DH Decision Height BC Back Course DISABLD Disabled BCN Beacon DIST Distance BR Snowbank(s) Containing arth/gravel DLA Delay or delayed BLW Below DLT Delete BND Bound DLY Daily 1

2 s Notices to Airmen D Distance easuring quipment HR Hour DSTN Demonstration DP DRFT DSPLCD Dew Point Temperature Snowbank(s) Caused By Wind Action Displaced IAF IAP INBD I Initial approach fix Instrument Approach Procedure Inbound ID Identification ast IDNT Identify/Identifier/Identification B astbound IF Intermediate fix FAS n Route Flight Advisory Service ILS Instrument Landing System LV levation I Inner arker NG ngine IC Instrument eteorological Conditions NRT n route IN Inch/Inches NTR ntire INDFLY Indefinitely XC xcept INFO Information INOP Inoperative FAC FAF FAN KR FDC FI/T F Facility or facilities Final Approach fix Fan arker Flight Data Center Flight inspection temporary INSTR INT INTL INTST IR Instrument Intersection International Intensity Ice On Runway(s) FI/P Flight inspection permanent K F From KT Knots FRQ Frequency FNA FP FRQ FRH FRI FRZN FSS FT Final approach Feet per minute Frequency Fly Runway Heading Friday Frozen Automated/Flight Service Station Foot, feet L LAA LAT LAWRS LB LC LOC LCTD L Left Local Airport Advisory Latitude Limited Aviation Weather Reporting Station Pound/Pounds Local Control Local/Locally/Location Located G LDA Localizer Type Directional Aid GC Ground Control LGT Light or lighting GCA Ground Control Approach LGTD Lighted GOVT Government LIRL Low Intensity Runway Lights GP Glide Path LLWAS Low Level Wind Shear Alert System GPS Global Positioning System L Compass Locator at ILS iddle arker GRVL Gravel LDG Landing LLZ Localizer HAA HAT HDG HL HLI H Height Above Airport Height Above Touchdown Heading Helicopter Heliport LO LONG LRN LSR LT Compass Locator at ILS Outer arker Longitude Loran Loose Snow on Runway(s) Left Turn HIRL High Intensity Runway Lights HIWAS Hazardous Inflight Weather Advisory Service AG agnetic HLDG Holding AINT aintain, maintenance HOL Holiday ALS edium Intensity Approach Light System HP Holding Pattern 2

3 Notices to Airmen s ALSF ALSR APT CA DA A D IN IRL LS N NT OC ON RA SA SAW SG SL U edium Intensity Approach Light System with Sequenced Flashers edium Intensity Approach Light System with Runway Alignment Indicator Lights issed Approach Point inimum Crossing Altitude inimum Descent Altitude inimum nroute Altitude edium inute edium Intensity Runway Lights icrowave Landing System iddle arker inimum onitor/onitoring/onitored inimum Obstruction Clearance onday inimum reception altitude inimum Safe Altitude/inimum Sector Altitude inimum Safe Altitude Warning essage ean Sea Level U meters PAW PAPI PAR PARL PAT PAX PCL PR PJ PLA PLW PN PPR PRV PRN PROC PROP PSR PTCHY PTN PVT P Personnel and quipment Working Precision Approach Path Indicator Precision Approach Radar Parallel Pattern Passenger Pilot Controlled Lighting Permanent/Permanently Parachute jumping exercise Practice Low Approach Plow/Plowed Prior Notice Required Prior Permission Required Previous Psuedo random noise Procedure Propeller Packed Snow on Runway(s) Patchy Procedure Turn Private UD UNI ud unicipal RAIL R Runway Alignment Indicator Lights N NA NAV NB NDB N NGT N NR NONSTD NOPT NR NTAP NW N North Not Authorized Navigation Northbound Nondirectional Radio Beacon Northeast Night Nautical ile(s) Nautical ile Radius Nonstandard No Procedure Turn Required Number Notice To Airmen Publication Northwest RAOS RCAG RCL RCLL RCO RC RLCTD RIL RP RLLS RNDR RNAV RPLC RQRD RRL Remote Automatic eteorological Observing System Remote Communication Air/Ground Facility Runway Centerline Runway Centerline Light System Remote Communication Outlet Receive/Receiver Relocated Runway nd Identifier Lights Report Runway Lead in Lights System Remainder Area Navigation Replace Required Runway Remaining Lights OBSC OBST O OPR OPS ORIG OTS OVR Obscured Obstruction Outer arker Operate Operation Original Out of Service Over O RSR RSVN RT RT RTR RTS RUF RVR RVR RVRR n Route Surveillance Radar Reservation Right Turn Route Remote Transmitter/Receiver Return to Service Rough Runway Visual Range Runway Visual Range idpoint Runway Visual Range Rollout RVRT Runway Visual Range Touchdown 3

4 s Notices to Airmen RWY Runway TIL Until S SA SAT SAWR SB SDF S SFL SID SIUL South Sand, sanded Saturday S Supplementary Aviation Weather Reporting Station Southbound Simplified Directional Facility Southeast Sequence Flashing Lights Standard Instrument Departure Simultaneous TKOF T TPA TRL TRNG TRSN TSNT TU TWR TWY Takeoff Traffic anagement Traffic anagement Program Alert Terminal Training Transition Transient Tuesday Tower Taxiway SIR Packed or Compacted Snow and Ice on Runway(s) U SKD Scheduled UFN Until further notice SLR Slush on Runway(s) UNAVBL Unavailable SN Snow UNLGTD Unlighted SNBNK Snowbank(s) Caused by Plowing UNKD Unmarked SNGL Single UNNT Unmonitored SPD Speed UNRL Unreliable SSALF Simplified Short Approach Lighting System with Sequenced Flashers UNUSBL Unusable SSALR SSALS SSR STA STAR SUN SVC SW SWPT Simplified Short Approach Lighting System with Runway Alignment Indicator Lights Simplified Short Approach Lighting System Secondary Surveillance Radar Straight in Approach Standard Terminal Arrival Sunday Service Southwest Swept or Broom/Broomed VASI VDP VGSI VIA VIC VIS VC VOL VOR V Visual Approach Slope Indicator Visual Descent Point Visual Glide Slope Indicator By Way Of Instead/Versus Visibility Visual eteorological Conditions Volume VHF Omni Directional Radio Range T TAA TACAN TAR TDZ TDZ LG TPO TFC TFR TGL THN THR THRU THU T Temperature Terminal Arrival Area Tactical Air Navigational Aid Terminal area surveillance radar Touchdown Zone Touchdown zone lights Temporary Traffic Temporary Flight Restriction Touch and Go Landings Thin Threshold Through Thursday VORTAC W WB WD WF WI WI WKDAYS WKND WND WPT WSR WTR WX VOR and TACAN (colocated) W West Westbound Wednesday With effect from or effective from Within With immediate effect or effective immediately onday through Friday Saturday and Sunday Wind Waypoint Wet Snow on Runway(s) Water on Runway(s) Weather 4

5 Notices to Airmen s WATHR CONTRACTIONS A A A A01 A02 AAWF AC ACC ACSL ACYC ADRNDCK ADV ADVCTN ADVY AFC AFDK ALF ALGHNY ALQDS A Absolute (temperature) Alaskan Standard Time (time groups only) Arctic (air mass) Automated Observation without Precipitation Discriminator (rain/snow) (TAR) Automated Observation with Precipitation Discriminator (rain/snow) (TAR) Auxiliary Aviation Weather Facility Altocumulus Altocumulus Castellanus Standing Lenticular Altocumulus Anticyclonic Adirondack Advise Advection Advisory Area Forecast Center After Dark Aloft Allegheny All Quadrants BCG BFDK BINOVC BKN BL BL BLD BLDUP BLKHLS BLKT BLZD BS BNDRY BOVC BR BRF BRKHIC BRKSHR BR BTWN Becoming (expected between 2 digit beginning hour and 2 digit ending hour) (TAF) Before Dark Breaks in Overcast Broken Between Layers Blowing (TAR) Build Buildup Black Hills Blanket Blizzard Basic eteorological Services Boundary Base of Overcast ist (TAR) Brief Breaks in Higher Overcast Berkshire Barometer Between ALSC ALTA ALUTN ALWF A AD APLTD AS AS All Sectors Alberta Aleutian Actual Wind Factor Ante eridiem Amended Forecast (TAF) Amplitude Air ass American eteorological Society C C CAN CARIB CASCDS CAVOK CAVU C Central Standard Time (time groups only) Continental (air mass) Canada Caribbean Cascades Cloud and Visibility OK (TAR) Clear or Scattered Clouds and Visibility Greater Than Ten iles ANLYS Analysis CAWS Common Aviation Weather Sub system APLCN Appalachian CB Cumulonimbus AS Altostratus CBA Cumulonimbus amma ASOS Automated Surface Observing System CC Cirrocumulus ATLC Atlantic CCLKWS Counterclockwise AURBO Aurora Borealis CCSL Standing Lenticular Cirrocumulus AWP Aviation Weather Processors CDFNT Cold Front CFP Cold Front Passage B B BACLIN BATROP BC B Beginning of Precipitation (time in minutes) (weather reports only) Bering Standard Time (time groups only) Baroclinic or Baroclinic Prognosis Barotropic or Barotropic Prognosis Patches (TAR) CHARC CHSPK CI CIG CLD CLR Characteristic Chesapeake Cirrus Ceiling Cloud Clear at or below 12,000 feet (AWOS/ASOS report) (TAR) BC BCFG BCH BCKG BDA British Columbia Patchy Fog (TAR) Beach Backing Bermuda CLRS CNCL CNDN CNVTV CONFDC Clear and Smooth Cancel Canadian Convective Confidence 5

6 s Notices to Airmen CONTDVD Continental Divide XTR xtreme CONTRAILS Condensation Trails COR Correction to the observation (TAR) F CS Cirrostratus FA Area Forecast CST Coast FAH Fahrenheit CTGY Category FW 1 or 2 octas (eighths) cloud coverage (TAR) CTSKLS Catskills FC Funnel Cloud (TAR) CU Cumulus +FC Tornado/ Water Spout (TAR) CUFRA Cumulus Fractus FG Fog (TAR) CYC Cyclonic FIBI Filed but Impractical to Transmit CYCLGN Cyclogenesis FILG Filling FINO Weather Report Will Not Be Filed for Transmission D FL Flash Advisory DABRK Daybreak FLDST Flood Stage DCAVU DKTS DSH DNS DNSLP DNSTR DP DPNG DPTH DR DRFT DS DSIPT DTLN DTRT DU DVV DWNDFTS DWPNT DZ Clear or Scattered Clouds and Visibility Greater than Ten, Remainder of Report issing (weather reports only) Dakotas Diminish Dense Downslope Downstream Deep Deepening Depth Low Drifting (TAR) Drift Dust Storm (TAR) Dissipate International Dateline Deteriorate Widespread Dust (TAR) Downward Vertical Velocity Downdrafts Dew Point Drizzle (TAR) FLG FLRY FLWIS F FNT FNTGNS FNTLYS FORNN FRG FROPA FROSFC FRST FRWF FRZ FRZLVL FRZN FT FU FULYR FUOCTY FWC Falling Flurry Flood Warning Issued From (4 digit beginning time in hours and minutes) (TAF) Front Frontogenesis Frontolysis Forenoon Forming Frontal Passage Frontal Surface Frost Forecast Wind Factor Freeze Freezing Level Frozen Terminal Forecast Smoke (TAR) Smoke Layer Aloft Smoke Over City Fleet Weather Central FZ Supercooled/freezing (TAR) LNGT BDD SU NRN NWD OF SRN SWD XTRAP astern Standard Time (time groups only) nding of Precipitation (time in minutes) (weather reports only) quatorial (air mass) stimated (weather reports only) longate mbedded nvironment eteorological Support Unit ast northeastern (weather reports only) ast northeastward (weather reports only) xpected Operations Forecast ast southeastern (weather reports only) ast southeastward (weather reports only) xtrapolate G GLFALSK GLFCAL GLFX GLFSTLAWR GR GRAD GRBNKS GRDL GRTLKS GS GSTS GSTY G Gusts Reaching (knots) (weather reports only) Gulf of Alaska Gulf of California Gulf of exico Gulf of St. Lawrence Hail (TAR) Gradient Grand Banks Gradual Great Lakes Small Hail/Snow Pellets (TAR) Gusts Gusty H HCVIS High Clouds Visible 6

7 Notices to Airmen s HDFRZ Hard Freeze LOAT Lowest Temperature qualed for All Time HDSVLY Hudson Valley LOF Lowest Temperature qualed for The onth HI Hi LOS Lowest Temperature qualed So arly HIAT Highest Temperature qualed for All Time LOSL Lowest Temperature qualed So Late HIF Highest Temperature qualed for The onth LOTP Lowest Temperature HIS Highest Temperature qualed So arly LOXAT Lowest Temperature xceeded for All Time HISL Highest Temperature qualed So Late LOXF Lowest Temperature xceeded for The onth HIFOR High Level Forecast LOXS Lowest Temperature xceeded So arly HITP Highest Temperature LOXSL Lowest Temperature xceeded So Late HIXAT Highest Temperature xceeded for All Time LSR Loose Snow on Runway HIXF Highest Temperature xceeded for The onth LTGCC Lightning Cloud-to-Cloud HIXS Highest Temperature xceeded So arly LTGCCCG Lightning Cloud-to-Cloud, Cloud-to-Ground HIXSL Highest Temperature xceeded So Late LTGCG Lightning Cloud-to-Ground HLSTO Hailstones LTGCW Lightning Cloud-to-Water HLTP Hilltop LTGIC Lightning in Clouds HLYR Haze Layer Aloft LTLCG Little Change HURCN Hurricane LTNG Lightning HURP Hurricane Report LX Low Index HX High Index LYR Layer or Layered or Layers HZ Haze (TAR) I aritime (air mass) IC ICG ICGIC ICGICIP ICGIP IDT INLD INSTBY INTR INTRTRGN INTS INTSFY INVRN IOVC IR Ice Crystals (TAR) Icing Icing in Clouds Icing in Clouds and Precipitation Icing in Precipitation Immediate Inland Instability Interior Inter ountain Region Intense Intensify Inversion In Overcast Ice on Runway A AN GG X HKVLY I IDN IFG LTLVL In temperature field means minus or below zero (TAR) In RVR Field, indicates visibility less than lowest reportable sensor value (e.g. 0600FT) issing (weather reports only) ountain Standard Time (time groups only) ap Analysis anitoba erging exico ohawk Valley Shallow (TAR) idnight Patches of Shallow Fog Not Deeper Than Two eters (TAR) elting Level JTSTR Jet Stream J O NLD OGR ain eteorological Office ainland oderate or Greater K KFRST K Cold (air mass) Killing Frost ONTR OV RGL RNG onitor ove arginal orning LABRDR LCTP LDG LFT LGRNG LIFR L Labrador Little Change in Temperature Landing Lift Long Range Low IFR (weather reports only) RT S STLY STR TN VFR XD aritime inus ostly oisture ountain arginal VFR ixed LK Lake 7

8 s Notices to Airmen NB NCWX NLY NRN NW NG NFLD NGT NL NBR NNRN NNWD NNWRN NNWWD NO NORPI NPRS NS NS NSCSWD NSW NVA NWLY NWRN OBS OBSC OCFNT OCLD OCLN OFP OFSHR OTNS ONSHR ONT ORGPHC OSV OTAS OTLK OVC P P P P6S PAC PBL PCPN PDT New Brunswick N No Change in Weather Northeasterly (weather reports only) Northeastern New ngland Newfoundland Night No Layers Number North northeastern (weather reports only) North northeastward (weather reports only) North northwestern (weather reports only) Northwestward (weather reports only) Not available (e.g. SLPNO, RVRNO) No Pilot Balloon Observation Will Be Filed Next Collection Unless Weather Changes Significantly Nonpersistent Nimbostratus Nova Scotia No Small Craft or Storm Warning are Being Displayed No Significant Weather (TAR) Negative Vorticity Advection Northwesterly (weather reports only) Northwestern (weather reports only) O Observation Obscure Occluded Front Occlude Occlusion Occluded Frontal Passage Offshore Over ountains On Shore Ontario Orographic Ocean Station Vessel On Top and Smooth Outlook Overcast P Pacific Standard Time (time group only) Polar (air mass) In RVR field, indicates visibility greater than highest reportable sensor value (e.g. P6000FT) Visibility greater than 6 statute miles (TAF only) Pacific Probable Precipitation Predominant PDT PDW PL PN PGTSND PIBAL PIS PISO PIWI PLW PNHDL PO Predominate Priority Delayed Weather Ice Pellets (TAR) Peninsula Puget Sound Pilot Balloon Observation No Pilot Balloon Observation Due To Unfavorable Sea Conditions No Pilot Balloon Observation Due To Snow No Pilot Balloon Observation Due To High, or Gusty, Surface Wind Plow (snow) Panhandle Dust/Sand Whirls (TAR) PPINA Radar Weather Report Not Available (or omitted for a reason different than those otherwise stated) PPIN Radar Weather Report No choes Observed PPINO Radar Weather Report quipment Inoperative Due To Breakdown PPIOK Radar Weather Report quipment Operation Resumed PPIO Radar Weather Report quipment Inoperative Due To aintenance PR Partial (TAR) PRBLTY Probability PRSFR Pressure Falling Rapidly PRSRR Pressure Rising Rapidly PRJP Pressure Jump (weather reports only) PROB40 Probability 40 percent (TAR) PROG Prognosis or Prognostic PRSNT Present PS Plus PSG Passage PSG Passing PTCHY Patchy PTLY Partly PVA Positive Vorticity Advection PY Spray (TAR) QSTNRY QU R RA RABA RABAL RABAR RACO RADAT RADNO RAFI RAFRZ RAH Q Quasi-stationary Quebec R Runway (used in RVR measurement) Rain (TAR) No RAWIN Obs., No Balloons Available Radiosonde Balloon Wind Data Radiosonde Balloon Release No RAWIN Obs., Communications Out Radiosonde Observation Data Report issing Account Radio Failure Radiosonde Observation Not Filed Radiosonde Observation Freezing Levels No RAWIN Obs., No Gas Available 8

9 Notices to Airmen s RAICG RAOB RARP RAVU RAW RAWI RAWIN RCD RCDNA RCDN RCDNO RCDO RCKY RDG RDWND RSTR RGD RH RHINO RHINO RIOGD RK RNFL ROBPS RPD RSG RUF RY/RWY SA SASK SBSD SC SCSL SCT SLS SLY SRN SFRICS SG SGD SH SHFT SHLW SHRTLY SHWR SIRNV SIR SKC Radiosonde Observation Icing at Radiosonde Observation Radar Weather Report Radiosonde Analysis and Verification Unit No RAWIN obs., Unfavorable Weather No RAWIN Obs., High and Gusty Winds Upper Winds Obs. (by radio methods) Radar Cloud Detection Report Radar Cloud Detection Report Not Available Radar Cloud Detection Report No choes Observed Radar Cloud Detector Inoperative Due to Breakdown Until Radar Cloud Detector Inoperative Due to aintenance Until Rockies (mountains) Ridge Radar Dome Wind Restrict Ragged Relative Humidity Radar cho Height Information Not Available Radar Range Height Indicator Not Operating on Scan Rio Grande Remark(s) Rainfall Radar Operating Below Prescribed Standard Rapid Rising Rough Runway S Sand (TAR) Saskatchewan Subside Stratocumulus Standing Lenticular Stratocumulus Scattered Severe Local Storms Southeasterly (weather reports only) Southeastern (weather reports only) Atmospherics Snow Grains (TAR) Solar Geophysical Data Showers (TAR) Shift (weather reports only) Shallow Shortly Shower Sierra Nevada Snow and Ice on Runway Sky Clear (TAR) SLD Solid SLP Sea Level pressure (e.g reported as 132) SLR Slush on Runway SLT Sleet S Statute mile(s) SK Smoke STH Smooth SN Snow (TAR) SNBNK Snowbank SNFLK Snowflake SNOINCR Snow Depth Increase in Past Hour SNW Snow SNWFL Snowfall SP Station Pressure SPCI Special Report (TAR) SPKL Sprinkle SPLNS South Plains SPRD Spread SQ Squall (TAR) SQAL Squall SQLN Squall Line SS Sandstorm (TAR) SSRN South-southeastern (weather reports only) SSWD South-southeastward (weather reports only) SSWRN South-southwestern (weather reports only) SSWWD South southwestward (weather reports only) ST Stratus STAGN Stagnation STFR Stratus Fractus STFR Stratiform STG Strong ST 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 T TCU TPO THD THDR THK THN TKOF TOP TOVC T Trace (weather reports only) Tropical (air mass) Towering Cumulus Temporary changes expected (between 2 digit beginning hour and 2 digit ending hour) (TAF) Thunderhead (non TAR) Thunder (non TAR) Thick Thin Takeoff Cloud Top Top of Overcast 9

10 s Notices to Airmen TPG Topping VSBYIR Visibility Increasing Rapidly TRIB Tributary VV Vertical Visibility (Indefinite Ceiling) (TAR) TROF Trough TROP Tropopause W TRPCD Tropical Continental (air mass) W Warm (air mass) TRPCL Tropical WA AIRT TRPLYR Trapping Layer WDC 1 World Data Centers in Western urope TS Thunderstorm (TAR) WDC 2 World Data Centers Throughout Rest of World TSHWR Thundershower (non TAR) WDLY Widely TSQLS Thundersqualls (non TAR) WDSPRD Widespread TST Thunderstorm (non TAR) WA Weather TURBC Turbulence WFP Warm Front Passage TURBT Turbulent WINT Winter TWRG Towering WND Wind WNWRN West northwestern (weather reports only) U WNWWD West northwestward (weather reports only) UAG Upper Atmosphere Geophysics WPLTO Western Plateau UDDF Up and Down Drafts WR Wet Runway UNSBL Unseasonable WR Warm UNSTBL Unstable WRFNT Warm Front UNSTDY Unsteady WRNG Warning UNSTL UP UPDFTS UPR UPSLP UPSTR UVV UWNDS Unsettle Unknown Precipitation (Automated Observations) Updrafts Upper Upslope Upstream Upward Vertical Velocity Upper Winds WS WS WSHFT WSO WSR WSWRN WSWWD WTR Wind Shear (in TAFs, low level and not associated with convective activity) SIGT Wind Shift Weather Service Operations anual Wet Snow on Runway West southwestern (weather reports only) West southwestward (weather reports only) Water V WTSPT Waterspout V V VA VC VLCTY VLNT Varies (wind direction and RVR) Variable (weather reports only) Volcanic Ash (TAR) Vicinity Velocity Violent WV WW WXCON XCP XPC Wave Severe Weather Forecast Weather Reconnaissance Flight Pilot Report X xcept xpect VLY VR VRB Valley Veer Variable wind direction when speed is less than or equal to 6 knots Y YKN Y Yukon Standard Time (time groups only) Yukon VRISL Vancouver Island, BC YLSTN Yellowstone VRT OTN Vertical otion VSBY VSBYDR Visibility Visibility Decreasing Rapidly ZI ZI Z Zonal Index Zone of Interior 10

KEY TO DECODING THE U.S. METAR OBSERVATION REPORT

KEY TO DECODING THE U.S. METAR OBSERVATION REPORT Example METAR Report METAR KABC 121755Z AUTO 21016G24KT 180V240 1SM R11/P6000FT -RA BR BKN015 0VC025 06/04 A2990 RMK A02 PK WND 20032/25 WSHFT 1715 VIS