Understanding Sigmets - Honeywell KMD 250 Pilot's Manual

Multi-function display/gps
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Understanding Weather Reports

UNDERSTANDING SIGMETS

The following is an example of a typical SIGMET issued for turbulence
with an explanation of the elements.
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2
CHIR UWS 041430
4
SIGMET ROMEO 1 VALID UNTIL 041830
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KY TN WV VA OH
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FROM CVG TO EKN TO PSK TO VXV TO CVG
OCNL SEV TURB BTN 300 AND 360. RPRTD BY AIRCRAFT.
7
CONDS CONTG BYD 1830Z.
8
SLM/GTB
1. Forecast Area: CHIR
This is the forecast area identifier of the issuing Weather Service
Forecast Office.
BOS
Boston
CHI
Chicago
DFW
Dallas/Ft. Worth
MIA
Miami
SFO
San Francisco
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 phenom-
enon. 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
Rev 4 Aug/2007
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2-74
KMD 250 Pilot's Guide

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