Tornado Watch 944

Issued

Dec 9, 2008, 4:11 AM CST (10:11 UTC)

Expired

Dec 9, 2008, 11:00 AM CST

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Shreveport radar (KSHV), 52 km from the middle of the area, began a volume at 10:12 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

40%

One or more EF2 to EF5 tornadoes

20%

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

10%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 2421Dec 9, 1:20 AM CST
• Mesoscale Discussion 2422Dec 9, 2:17 AM CST
• Mesoscale Discussion 2424Dec 9, 3:41 AM CST
• Mesoscale Discussion 2426Dec 9, 7:41 AM CST
• Mesoscale Discussion 2427Dec 9, 10:12 AM CST

507 
WWUS20 KWNS 091012
SEL4  
SPC WW 091012
ARZ000-LAZ000-OKZ000-TXZ000-091700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 944
NWS STORM PREDICTION CENTER NORMAN OK
410 AM CST TUE DEC 9 2008

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

       LARGE PART OF SOUTHERN ARKANSAS
       MUCH OF NORTHERN LOUISIANA
       SMALL PART OF SOUTHEAST OKLAHOMA
       PARTS OF NORTHEAST TEXAS

EFFECTIVE THIS TUESDAY MORNING FROM 410 AM UNTIL 1100 AM CST.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE
MILES EAST AND WEST OF A LINE FROM 75 MILES SOUTH OF LONGVIEW
TEXAS TO 35 MILES NORTH NORTHWEST OF LITTLE ROCK ARKANSAS.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU4).

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...THIS TORNADO WATCH REPLACES SEVERE
THUNDERSTORM WATCH NUMBER 943. WATCH NUMBER 943 WILL NOT BE IN
EFFECT AFTER 410 AM CST. CONTINUE...WW 942...

DISCUSSION...MOISTURE/INSTABILITY CONTINUE TO SPREAD NWD AHEAD OF
DEVELOPING STRONG UPPER TROUGH APPROACHING SRN PLAINS.  WITH STRONG
VEERING SHEAR PROFILES IN PLACE...POTENTIAL WILL CONTINUE FOR
SUPERCELLS AND TORNADOES ACROSS THE WATCH AREA THRU THE MORNING. 
FAVORABLE CONDITIONS WILL GRADUALLY DEVELOP N AND E ACROSS THE WATCH
AREA WITH THE SUPPORT OF THE 40-50KT SLY LLJ.

AVIATION...TORNADOES AND 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 24040.


...HALES

Tornado Watches in Arkansas, 2008Tornado Watches in Texas, 2008Tornado Watches in Louisiana, 2008Every tornado 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.