Tornado Watch 721

Issued

Oct 26, 2010, 4:05 AM CDT (09:05 UTC)

Expired

Oct 26, 2010, 12:00 PM CDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

70 kt

The Paducah radar (KPAH), 122 km from the middle of the area, began a volume at 09:05 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

80%

One or more EF2 to EF5 tornadoes

40%

Ten or more severe wind reports

95%

One or more gusts of 65 knots or more

50%

Ten or more severe hail reports

20%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1996Oct 26, 2:21 AM CDT
• Mesoscale Discussion 1997Oct 26, 3:38 AM CDT
• Mesoscale Discussion 1999Oct 26, 6:00 AM CDT
• Mesoscale Discussion 2000Oct 26, 8:54 AM CDT
• Mesoscale Discussion 2003Oct 26, 11:26 AM CDT

992 
WWUS20 KWNS 260919
SEL1
SPC WW 260919
ARZ000-ILZ000-INZ000-KYZ000-MOZ000-MSZ000-TNZ000-261700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 721
NWS STORM PREDICTION CENTER NORMAN OK
405 AM CDT TUE OCT 26 2010

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

       SOUTHWEST THROUGH NORTHEASTERN ARKANSAS
       SOUTHERN ILLINOIS
       SOUTHWEST INDIANA
       WESTERN KENTUCKY
       SOUTHEASTERN MISSOURI
       NORTHERN MISSISSIPPI
       WESTERN AND MIDDLE TENNESSEE

EFFECTIVE THIS TUESDAY MORNING FROM 405 AM UNTIL NOON CDT.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 115 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES EAST NORTHEAST OF
MOUNT VERNON ILLINOIS TO 30 MILES SOUTH SOUTHEAST OF PINE BLUFF
ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

OTHER WATCH INFORMATION...CONTINUE...WW 719...WW 720...

DISCUSSION...TSTMS EXPECTED TO SLOWLY INCREASE ALONG AR/SRN MO COLD
FRONT THROUGH LATER THIS MORNING AS FRONT CONTINUES ESE INTO WRN
PARTS OF KY/TN AND NW MS.  DEEP FORCING FOR ASCENT WILL BE WEAKER
COMPARED TO AREAS FARTHER N.  BUT COMBINATION OF LOW LVL FORCED
UPLIFT ALONG FRONT AND INCREASINGLY RICH MOISTURE /PW 1.25-1.50
INCHES/ SUGGESTS AN INCREASING LIKELIHOOD THAT EXISTING CINH WILL BE
OVERCOME AS POWERFUL NRN MO/IA UPR TROUGH GLANCES WATCH AREA.  THIS
SHOULD LEAD TO A BROKEN BAND OR TWO OF STORMS LATER THIS MORNING
FROM SE MO AND THE AR/MS DELTA REGION INTO WRN TN/WRN KY.  GIVEN
SUSTAINED UPDRAFTS...WIND FIELD WILL BE FAVORABLE FOR SUPERCELLS
POSING A RISK FOR BOTH TORNADOES AND SMALL BOWS WITH DMGG WIND.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 24050.


...CORFIDI

Tornado Watches in Arkansas, 2010Tornado Watches in Tennessee, 2010Tornado Watches in Kentucky, 2010Every tornado watch in 2010

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.