Severe Thunderstorm Watch 708

Issued

Oct 24, 2010, 4:00 PM CDT (21:00 UTC)

Expired

Oct 24, 2010, 8:58 PM CDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Memphis radar (KNQA), 166 km from the middle of the area, began a volume at 21:01 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

30%

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

70%

• Mesoscale Discussion 1977Oct 24, 3:36 PM CDT
• Mesoscale Discussion 1981Oct 24, 7:01 PM CDT
• Mesoscale Discussion 1982Oct 24, 8:23 PM CDT

915 
WWUS20 KWNS 242059
SEL8
SPC WW 242059
ARZ000-LAZ000-MSZ000-250300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 708
NWS STORM PREDICTION CENTER NORMAN OK
400 PM CDT SUN OCT 24 2010

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

       EAST-CENTRAL ARKANSAS
       FAR NORTHEAST LOUISIANA
       NORTHERN AND WESTERN MISSISSIPPI

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 400 PM UNTIL
1000 PM 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 15 MILES SOUTH
SOUTHWEST OF GREENVILLE MISSISSIPPI TO 30 MILES EAST OF OXFORD
MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).

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 707...

DISCUSSION...SEVERE TSTMS IN PROGRESS OVER SERN AR/NERN LA ARE
EXPECTED TO MOVE/DEVELOP EWD INTO WW AREA LATE THIS AFTERNOON INTO
EVENING.  SURFACE OBSERVATIONS INDICATE THAT CONSIDERABLE BOUNDARY
LAYER MIXING HAS LED TO 20-25 F T/TD SPREADS WITH MLCAPE OF AROUND
1000 J/KG.  GIVEN THE PRESENCE OF 35-45 KT OF DEEP WLY SHEAR...SETUP
WILL FAVOR LARGELY OUTFLOW-DOMINANT CONVECTIVE MODES WITH A RISK FOR
DAMAGING WINDS AND HAIL INTO EARLY EVENING.

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 500. MEAN STORM
MOTION VECTOR 24030.


...MEAD

Severe Thunderstorm Watches in Mississippi, 2010Every severe thunderstorm 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.