BendixKing KAC 503 - Supplemental System FIS - Manual (Page 14)

10
Rev 1 Oct. 2003
UNDERSTANDING SIGMETS
The following is an example of a typical SIGMET issued for turbulence with
an explanation of the elements.
1. Forecast Area: CHIR
This is the station identifier of the issuing Weather Service Forecast
Office.
BOS Boston
CHI Chicago
DFW Dallas/Ft. Worth
MIA Miami
SFO San Fransisco
SLC Salt Lake City
The R denotes report ROMEO. A new alphabetic designator is given
each time a SIGMET is issued for a new weather phenomenon. The
order of issuance is as follows:
N NOVEMBER
O OSCAR
P PAPA
Q QUEBEC
R ROMEO
U UNIFORM
V VICTOR
W WHISKEY
X
XRAY
Y YANKEE
SIGMETs are issued for:
Severe icing not associated with thunderstorms
Severe or extreme turbulence or clear air turbulence (CAT)
Dust storms or sandstorms lowering visibilities to < 3 miles
Volcanic ash
2. Report Type: UWS
UWS indicates this is the first issuance of report ROMEO. Subsequent
reports for ROMEO would display WS.
CHIR UWS 041430
SIGMET ROMEO 1 VALID UNTIL 041830
KY TN WV VA OH
FROM CVG TO EKN TO PSK TO VXV TO CVG
OCNL SEV TURB BTN 300 AND 360. RPRTD BY AIRCRAFT.
CONDS CONTG BYD 1830Z.
SLM/GTB
1 3
4
5
2
6
7
8