Severe Thunderstorm Watch 101

Issued

Mar 23, 2012, 11:44 AM CDT (16:44 UTC)

Expired

Mar 23, 2012, 7:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Evansville,IN radar (KVWX), 62 km from the middle of the area, began a volume at 16:47 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

10%

Ten or more severe hail reports

50%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 332Mar 23, 9:46 AM CDT
• Mesoscale Discussion 334Mar 23, 1:28 PM CDT
• Mesoscale Discussion 336Mar 23, 3:17 PM CDT
• Mesoscale Discussion 338Mar 23, 5:08 PM CDT
• Mesoscale Discussion 339Mar 23, 6:43 PM CDT

839 
WWUS20 KWNS 231647
SEL1
SPC WW 231647
ILZ000-INZ000-KYZ000-MOZ000-240000-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 101
NWS STORM PREDICTION CENTER NORMAN OK
1145 AM CDT FRI MAR 23 2012

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

       CENTRAL AND SOUTHERN ILLINOIS
       SOUTHWEST INDIANA
       WESTERN KENTUCKY
       EXTREME SOUTHEAST MISSOURI

EFFECTIVE THIS FRIDAY MORNING AND EVENING FROM 1145 AM UNTIL 700
PM CDT.

HAIL TO 2 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 65
STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES EAST
NORTHEAST OF MATTOON ILLINOIS TO 35 MILES SOUTH SOUTHEAST OF
PADUCAH KENTUCKY.  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.

DISCUSSION...SEVERAL BANDS OF THUNDERSTORMS HAVE INTENSIFIED THIS
MORNING FROM EXTREME SERN MO INTO WRN KY AND SRN IL...IN ADVANCE OF
AN EWD MOVING UPPER LOW OVER MO.  ZONES OF CLEAR SKIES WILL PERMIT
STRONGER HEATING/DESTABILIZATION AHEAD OF THE KY/SRN IL STORMS...AND
STRONG DYNAMIC FORCING FOR LARGE SCALE ASCENT WILL ENHANCE SEVERE
STORM POTENTIAL THROUGH THE AFTERNOON HOURS.  LARGE HAIL AND
OCCASIONAL STRONG WIND GUSTS WILL BE PRODUCED BY STRONGER
CELLS...ALTHOUGH AN ISOLATED BRIEF TORNADO MAY ALSO BE POSSIBLE WITH
ANY PERSISTENT SUPERCELL THAT FORMS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 20025.


...WEISS

Severe Thunderstorm Watches in Illinois, 2012Severe Thunderstorm Watches in Kentucky, 2012Severe Thunderstorm Watches in Indiana, 2012Every severe thunderstorm watch in 2012

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.