Decoding Weather Reports


Decoding weather reports  is another very important skill to learn..

 I have given the abbreviations below in easy language. It is suggested you download the weather to Fltsim at the same time otherwise the weather will be wrong to the forecast.

VOLMET means groups of airports in a given area. Radio give the updated weather reports for airfields in the group and are changed about every 30 minutes.

IE London  Volmet Main will give all the weather at the main airports in United Kingdom.

What do reports mean in this format?  I will break it down bit by bit  for you into easy terms so you can understand. You can use the codes below to translate it.

Metar and TAF  reports have abbreviations

Report type  Location Date/time  Valid time   wind            visibility      weather   

TAF                EGLL    130600Z      130716        31015              8000            SHRA
         

 FEW005       SCT018CB BKN025  TEMPO  131116
4000 SHRA PROB30 131416 TSRA BKN010CB 



This report means :- Heathrow weather reported dated the 13 of the month at 0600 hours the valid time of the report is between 0700 to 1600 hours on the 13th the wind is 310 at 15 knots 8000 metres visibility with rain showers a few clouds at 500ft scattered thunderstorms at 1800ft broken clouds at 2500 ft/ Temporary on the 13th day between 1100 and 1600 hours visibility will be 4000 metres with rain showers  with a 30 percent chance of thunderstorms and rain showers with broken thundercloud at 1000ft.

 

Abbreviations  below of the common ones used :-

ABBREVIATION

MEANING

BECMG

BECOMING

BL

BLOWING

BLO

BELOW CLOUDS

BR

MIST

BTN

BETWEEN

CAT

CLEAR AIR TURBULENCE

COT

AT THE COAST

ICE

ICING

IMPR

IMPROVING

IMT

IMMEDIATELY

INC

IN CLOUD

INCR

INCREASING

INTSF

INTENSIFY

IR

ICE ON RUNWAY

LAN

INLAND

LGT

LIGHT

RA

RAIN

RE

RECENT

SEV

SEVERE

SFC

SURFACE

SG

SLEET

SH

SHOWERS

SN

SNOW

SQ

SQUALL

 

ABBREVIATION

  MEANS

SN

SNOW

SQ

SQUALL

CUF

CUMULUS

DECR

DECREASE

DP 

DEW POINT (FOG FORM TEMP)

DR

LOW DRIFTING

DTRT

DETORIATE

DZ

DRIZZLE

FCST

FORECAST

FG

FOG

FLUC

FLUCTUATING

FT

FEET

FU

SMOKE

FZ

FREEZING

GEN

GENERALLY

GR

HAIL

GS

SMALL HAIL

HVY

HEAVY

LOC

LOCALLY

LSQ

LINE SQUALL

LV

LIGHT VARIABLE WIND

LYR

LAYERED

MI

SHALLOW

MOD

               MODERATE

MS

MINUS  MS15 = MINUS 15

MT

MOUNTAIN

MTW

MOUNTAIN WAVES  MORE TURBULENCE NORMALLY

NC

NO CHANGE

NSC

NIL SIGNIFICANT CLOUD

NSW

NIL SIGNIFICANT WEATHER

OBSC

OSCURED      TOTAL OVERCAST

PE

ICE PELLETS

PROV

PROVISIONAL

PS

PLUS

STNR

STATIONARY

TCU

TOWERING CUMULUS MORE TURBULENCE 

TS

THUNDERSTORM        EXTREME TURBULENCE

TURB

TURBULENCE

V

VARYING

VAL

VALLEYS

VCY

VICINITY

VC

VICINITY OF AIRFIELD

VIS

VISIBILITY

WDSPR

WIDESPREAD

WKN

GETTING WEAKER

WS

WINDSHEAR    VERY DANGEROUS

WX 

WEATHER

CAVOK

CLOUD ABOVE 5000FT VISIBILITY 10 K OR MORE

FEW 

FEWOO5 MEANS A FEW CLOUDS AT 500FT BASE 25% CLOUD

SCT

SCATTERED020  = SCATTERED AT 2000 FT  BETWEEN 25-50% CLOUD

BKN

BROKEN                50% TO 99% CLOUD

OVC

TOTALLY OVERCAST

THUNDERSTORMS

DANGER

CB

THUNDERSTORM CLOUD

ISOL

ISOLATED THUNDERSTORM

OCNL

OCCASIONAL THUNDERSTORM

FREQ

FREQUENT THUNDERSTORMS

EMBD

HIDDEN IN OTHER CLOUDS THE WORST FOR PILOTS TO FIND AS DO NOT STAND OUT

Some Excellent weather sites are included in the AVSIM Education Resource Centre.We therefore do not need to duplicate it here. My colleague Chuck has some excellent photos of weather on his site.

 

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