Tornado Watch 30

Issued

Feb 24, 2007, 8:47 AM CST (14:47 UTC)

Expired

Feb 24, 2007, 6:00 PM CST

In force

9 hr

Issued by

the Storm Prediction Center

Particularly dangerous situation

Yes

Largest hail expected

2.5 in

Strongest gust expected

70 kt

The Western Arkansas radar (KSRX), 138 km from the middle of the area, began a volume at 14:49 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

60%

Ten or more severe wind reports

80%

One or more gusts of 65 knots or more

60%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

50%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 192Feb 24, 8:29 AM CST
• Mesoscale Discussion 194Feb 24, 10:35 AM CST
• Mesoscale Discussion 197Feb 24, 1:45 PM CST
• Mesoscale Discussion 199Feb 24, 3:49 PM CST

000
WWUS20 KWNS 241449
SEL0  
SPC WW 241449
ARZ000-LAZ000-OKZ000-TXZ000-242200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 30
NWS STORM PREDICTION CENTER NORMAN OK
845 AM CST SAT FEB 24 2007

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

       MUCH OF ARKANSAS
       MUCH OF NORTHERN LOUISIANA
       PARTS OF EASTERN OKLAHOMA
       NORTHEAST TEXAS

EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 845 AM UNTIL
400 PM CST.

...THIS IS A PARTICULARLY DANGEROUS SITUATION...

DESTRUCTIVE TORNADOES...LARGE HAIL TO 2.5 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 105 STATUTE
MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH NORTHEAST OF
RUSSELLVILLE ARKANSAS TO 35 MILES SOUTH OF SHREVEPORT LOUISIANA. 
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU0).

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.

DISCUSSION...VERY INTENSE TROUGH AND ASSOCIATED 120KT MID LEVEL JET
MAX ROTATING EWD ACROSS SRN PLAINS.  WITH IMPRESSIVE RETURN OF GULF
MOISTURE UNDERWAY ALONG WITH STEEP MID LEVEL LAPSE
RATES...CONDITIONS WILL RAPIDLY BECOME FAVORABLE FOR DEVELOPMENT OF
TORNADIC SUPERCELLS.  CURRENT INHIBITION WILL QUICKLY WEAKEN NEWD
ACROSS WATCH AREA WITH MID LEVEL COOLING AND STRONG UPWARD MOTION. 
TORNADO POTENTIAL EXPECTED TO INCREASE THRU THE AFTERNOON ACROSS THE
WATCH.  GIVEN THE VERY STRONG SHEAR PROFILES AND
THERMODYNAMICS...DEVELOPMENT OF STRONG TORNADOES ARE POSSIBLE BY
AFTERNOON.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 24050.


...HALES

Tornado Watches in Arkansas, 2007Tornado Watches in Texas, 2007Tornado Watches in Louisiana, 2007Every tornado watch in 2007

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.