Code group |
Code group specifications |
Meaning |
Examples |
AIRMET |
Information indicator |
Information name |
AIRMET |
EPWW |
Location indicator |
ICAO indication for ATS unit operating for this FIR for which the AIRMET was issued |
EPWW |
AIRMET 4 |
Identification |
Information identification and the next number |
AIRMET 2 |
VALID 030350/030750 |
Validity period |
First two numbers indicate a day of the month, next four numbers indicate information validity period in UTC (for example 1230, 1630) |
VALID 221215/221600
VALID 101520/101800 |
EPWA- |
Location indicator of Meteorological Watch Office originating the message with a separating hyphen |
Aerodrome ICAO code where MWO is located |
EPWA- |
EPWW WARSZAWA FIR |
Name of the FIR |
Name of the FIR for which the AIRMET is issued |
EPWW WARSZAWA FIR |
MOD ICE |
Phenomenon |
Description of a weather phenomenon causing the issuance of AIRMET. Weather phenomena at cruising levels up to FL100 or FL150 are included |
Surface wind speed above 30 KT over widespread areas; widespread visibility reduction to less than 5000m including the weather phenomenon causing the reduction of visibility; thunderstorms: ISOL TS, OCNL TS, ISOL TSGR, OCNL TSGR; MT OBSC; widespread area of BKN or OVC cloud with height of base less than 1000 m above ground level; CB and TCU: ISOL, OCNL, FRQ; MOD ICE; MOD TURB; MOD MTW |
OBS |
Observed or forecast phenomenon |
Indication whether the information is observed and expected to continue, or forecast |
OBS
FCST
OBS AT 1210Z |
A1 |
Location |
Location referring to FIR, latitude and longitude in degrees and minutes or locations or geographic features well known internationally |
S OF 54
N PART A1
OVER N AND W PART OF POLAND |
BTN GND/FL150 |
Level |
Flight level or altitude or extent |
FL180
BLW FL200
TOP ABV FL100 |
MOV E |
Movement or expected movement |
Movement or expected movement (direction and speed) with reference to 8 points of compass |
MOV N
MOV SE |
NC |
Expected changes in intensity |
INTSF or WKN or NC |
WKN
NC |
CNL AIRMET |
Cancellation of AIRMET referring to its identification |
The type of cancelled information and its identification is given |
CNL AIRMET 1 101200/101430 |