Severe Thunderstorm Watch 921

Issued

Oct 21, 2008, 11:56 PM CDT (04:56 UTC)

Expired

Oct 22, 2008, 4:00 AM CDT

In force

4 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Dodge City radar (KDDC), 65 km from the middle of the area, began a volume at 04:56 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Two or more tornadoes

10%

One or more EF2 to EF5 tornadoes

5%

Ten or more severe wind reports

40%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 2339Oct 22, 3:03 AM CDT

000
WWUS20 KWNS 220458
SEL1  
SPC WW 220458
KSZ000-OKZ000-TXZ000-220900-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 921
NWS STORM PREDICTION CENTER NORMAN OK
1200 AM CDT WED OCT 22 2008

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 

       CENTRAL AND SOUTH CENTRAL KANSAS
       NORTHWEST OKLAHOMA AND THE EASTERN OKLAHOMA PANHANDLE
       THE NORTHEAST TEXAS PANHANDLE

EFFECTIVE THIS WEDNESDAY MORNING FROM MIDNIGHT UNTIL 400 AM CDT.

HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES NORTH
NORTHEAST OF RUSSELL KANSAS TO 15 MILES EAST SOUTHEAST OF GAGE
OKLAHOMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 920...

DISCUSSION...LINE OF STORMS ALONG COLD FRONT WILL CONTINUE TO SURGE
ESEWD ACROSS SW/CENTRAL KS...WITH SOME DEVELOPMENT SWD TOWARD NW OK
AND THE TX PANHANDLE.  THOUGH INSTABILITY WILL GRADUALLY DIMINISH
OVERNIGHT AND WITH EWD EXTENT...A WELL-DEVELOPED COLD POOL AND
SEVERAL MEASURED SEVERE GUSTS SUGGEST A CONTINUE WIND DAMAGE THREAT
FOR AT LEAST THE NEXT FEW HOURS.  FARTHER NE INTO CENTRAL
KS...CONVECTION WILL CONTINUE TO FORM ALONG THE WARM FRONT AND AT
THE INTERSECTION OF THIS BOUNDARY WITH THE SQUALL LINE.  LARGE HAIL
AND ISOLATED DAMAGING GUSTS WILL BE THE MAIN SEVERE THREATS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
MOTION VECTOR 28035.


...THOMPSON

Severe Thunderstorm Watches in Kansas, 2008Severe Thunderstorm Watches in Oklahoma, 2008Severe Thunderstorm Watches in Texas, 2008Every severe thunderstorm watch in 2008

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.