| Code group |
Code group specifications |
Meaning |
Examples |
| SIGMET |
Information indicator |
Information name |
SIGMET |
| EPWW |
Location indicator |
ICAO indication for ATS unit operating for this FIR for which the SIGMET was issued |
EPWW |
| SIGMET 1 |
Identification |
Information identification and the next number |
SIGMET 1 |
| VALID 030200/030600 |
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 SIGMET is issued |
EPWW WARSZAWA FIR |
| SEV ICE |
Phenomenon |
Description of a weather phenomenon causing the issuance of SIGMET. Heavy weather phenomena at all cruising levels |
OBSC TS, EMBD TS, FRQ TS, SQL TS
SEV TURB, SEV ICE, SEV ICE (FZRA), SEV MTW
EMBD TSGR |
| OBS/FCST |
Observed or forecast phenomenon |
Indication whether the information is observed and expected to continue, or forecast |
OBS
FCST
OBS AT 1210Z |
| W AND CENTRAL PART OF POLAND |
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 FL010/160 |
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 |
SLW MOV N
MOV SE |
| WKN |
Expected changes in intensity |
INTSF or WKN or NC |
WKN |
| CNL SIGMET |
Cancellation of SIGMET referring to its identification |
Type of cancellation is given information and the identification |
CNL SIGMET 1 101200/101430 |
