Severe Thunderstorm Watch 554

Issued

Jun 26, 2011, 1:58 AM CDT (06:58 UTC)

Expired

Jun 26, 2011, 5:55 AM CDT

In force

4 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Evansville,IN radar (KVWX), 49 km from the middle of the area, began a volume at 06:58 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

20%

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

30%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 1389Jun 25, 10:22 PM CDT
• Mesoscale Discussion 1392Jun 26, 1:21 AM CDT
• Mesoscale Discussion 1393Jun 26, 4:14 AM CDT

995 
WWUS20 KWNS 260702
SEL4
SPC WW 260702
ILZ000-INZ000-KYZ000-MOZ000-261400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 554
NWS STORM PREDICTION CENTER NORMAN OK
200 AM CDT SUN JUN 26 2011

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

       SOUTHERN ILLINOIS
       SOUTHERN INDIANA
       WESTERN AND CENTRAL KENTUCKY
       EASTERN MISSOURI

EFFECTIVE THIS SUNDAY MORNING FROM 200 AM UNTIL 900 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 NORTH AND SOUTH OF A LINE FROM 70 MILES SOUTHEAST
OF LOUISVILLE KENTUCKY TO 55 MILES WEST NORTHWEST OF FARMINGTON
MISSOURI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).

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...THIS SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 550...SEVERE THUNDERSTORM WATCH
NUMBER 553. WATCH NUMBER 550 553 WILL NOT BE IN EFFECT AFTER 200
AM CDT.

DISCUSSION...COMPLEX MCS OVER E CNTRL MO/SRN IL/SW IND EXPECTED TO
CONTINUE GENERALLY ESEWD.  EMBEDDED LEWP/BOW STRUCTURE NOW IN SW
IND/SRN IL SHOULD CONTINUE ESE WITH AN ACCOMPANYING THREAT FOR
LOCALLY DMGG WIND/MARGINALLY SVR HAIL AND PERHAPS A BRIEF TORNADO AS
ACTIVITY IS FED BY PW-RICH WSWLY 40 KT LLJ.  AN ADDITIONAL LEWP/BOW
MAY EVOLVE LATER THIS MORNING FARTHER W...FROM ELEVATED STORMS
FORMING ATTM ATOP QSTNRY PORTION OF ELONGATING COLD POOL IN ERN
MO/SRN IL.  IF SUCH A LEWP DOES EVOLVE...IT TOO SHOULD MOVE ESE OR
PERHAPS SEWD...AFFECTING MAINLY WRN KY WITH SPORADIC DMGG WIND.  IN
THE MEAN TIME...ISOLD DMGG WIND GUSTS...MARGINALLY SVR HAIL...AND
HEAVY RAIN COULD AFFECT E CNTRL/SE MO FOR THE NEXT SEVERAL HOURS AS
STORMS TRAIN ALONG QSTNRY /WRN/ PART OF LARGER SCALE MCS COLD POOL.

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 550. MEAN STORM
MOTION VECTOR 30030.


...CORFIDI

Severe Thunderstorm Watches in Kentucky, 2011Severe Thunderstorm Watches in Missouri, 2011Severe Thunderstorm Watches in Illinois, 2011Every severe thunderstorm watch in 2011

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.