2-76
Section 2
FIS Operation
Understanding Weather Reports
KMD 250 Pilot's Guide
Rev 4 Aug/2007
UNDERSTANDING CONVECTIVE SIGMETS
The following is an example of a typical Convective SIGMET with an
explanation of the elements.
1.
Station Identifier:
MKCC
MKC
is the station identifier of the Aviation Weather Center (AWC)
in Kansas City.
The
C
denotes the report is for the Central portion of the continental
United States. The choices are as follows:
C
Central
E
East
W
West
Convective SIGMETs are issued for:
Severe weather including: (a)Surface winds ≥ 50 knots,
(b) Surface hail ≥ 3/4 inch in diameter or (c) Tornadoes
Embedded thunderstorms (obscured by haze or other phenomena)
Line of thunderstorms
Thunderstorms ≥ VIP level 4 affecting ≥ 40% of an area ≥ 3000 sq.
mi.
2.
Report Type:
WST
WST
indicates this is a convective SIGMET.
3.
Date and Time Issued:
221855
.
22
indicates the 22nd day of the month.
1855
indicates UTC.
4.
This line is the identifying number of the Convective SIGMET.
Numbering begins daily at 0000 UTC. The
C
denotes the Central
portion of the country.
MKCC WST 221855
CONVECTIVE SIGMET 20C
VALID UNTIL 2055Z
ND SD
FROM 60W MOT-GFK-ABR-90W MOT
INTSFYG AREA SVR TSTMS MOVG FROM 2445. TOPS ABV FL450.
WIND GUSTS TO 60KT RPRTD. TORNADOES…HAIL TO 2 IN…WIND
GUSTS TO 65KT PSBL ND PTN.
1
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2
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KMD 250 FIS_R4 8/13/07 10:07 AM Page 2-76
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