Severe Thunderstorm Watch 710

Issued

Jul 20, 2008, 2:10 PM CDT (19:10 UTC)

Expired

Jul 20, 2008, 10:00 PM CDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Indianapolis radar (KIND), 90 km from the middle of the area, began a volume at 19:14 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

50%

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

20%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 1825Jul 20, 12:43 PM CDT
• Mesoscale Discussion 1830Jul 20, 5:33 PM CDT

000
WWUS20 KWNS 201909
SEL0  
SPC WW 201909
ILZ000-INZ000-KYZ000-210100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 710
NWS STORM PREDICTION CENTER NORMAN OK
210 PM CDT SUN JUL 20 2008

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

       PARTS OF EASTERN ILLINOIS
       PARTS OF CENTRAL AND SOUTHERN INDIANA
       SMALL PART OF NORTHERN KENTUCKY

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 210 PM UNTIL 800
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 60
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 15 MILES SOUTHWEST
OF DECATUR ILLINOIS TO 90 MILES EAST SOUTHEAST OF INDIANAPOLIS
INDIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).

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 708...WW 709...

DISCUSSION...A VERY WARM AND UNSTABLE AIR MASS NOW IN PLACE ACROSS
THE WATCH AREA.  WITH 30-35KT OF SHEAR AND MLCAPES TO 3000
J/KG...STORMS EXPECTED TO INCREASE IN NUMBER AND INTENSITY.  WIND
DAMAGE WILL BE THE PRIMARY THREAT AS STORMS DEVELOP INTO LINE
SEGMENTS AND MULTICELL CLUSTERS.

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 550. MEAN STORM
MOTION VECTOR 29030.


...HALES

Severe Thunderstorm Watches in Indiana, 2008Severe Thunderstorm Watches in Illinois, 2008Severe Thunderstorm Watches in Kentucky, 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.