Tornado Watch 111

Issued

Mar 14, 2008, 7:14 PM CDT (00:14 UTC)

Expired

Mar 15, 2008, 2:10 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

60 kt

The Shreveport radar (KSHV), 149 km from the middle of the area, began a volume at 00:16 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

10%

Ten or more severe hail reports

70%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 402Mar 14, 6:59 PM CDT
• Mesoscale Discussion 405Mar 14, 9:50 PM CDT
• Mesoscale Discussion 409Mar 14, 11:55 PM CDT
• Mesoscale Discussion 411Mar 15, 1:47 AM CDT

000
WWUS20 KWNS 150019
SEL1  
SPC WW 150019
ARZ000-LAZ000-MSZ000-TXZ000-150800-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 111
NWS STORM PREDICTION CENTER NORMAN OK
715 PM CDT FRI MAR 14 2008

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

       SOUTHERN AND CENTRAL ARKANSAS
       NORTHERN LOUISIANA
       WEST CENTRAL MISSISSIPPI
       NORTHEAST TEXAS

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 715 PM
UNTIL 300 AM CDT.

TORNADOES...HAIL TO 2.5 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 75 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 30 MILES WEST NORTHWEST OF
TEXARKANA ARKANSAS TO 35 MILES SOUTH SOUTHEAST OF GREENVILLE
MISSISSIPPI.  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.

DISCUSSION...TSTMS HAVE JUST DEVELOPED OVER NE TX/SW AR IN LOW-LEVEL
WAA ZONE ALONG WEAK WNW/ESE-ORIENTED WARM FRONT.  STORMS/SUPERCELLS
EXPECTED TO INCREASE IN WW THROUGH EARLY SATURDAY AS EXIT REGION OF
SLIGHTLY-AMPLIFYING MID/UPR JET STREAK OVER WRN OK CONTINUES ESEWD. 
COMBINATION OF INCREASING LOW-LEVEL MOISTURE...MODERATE TO STRONG
SPEED/DIRECTIONAL SHEAR...AND INCREASING UVV SUGGEST POTENTIAL FOR A
FEW SUSTAINED DISCRETE SUPERCELLS THAT COULD YIELD A COUPLE
TORNADOES...IN ADDITION TO LARGE HAIL/HIGH WIND.  THE STORMS SHOULD
MERGE INTO AN MCS BY EARLY SATURDAY...WITH A CONTINUING THREAT FOR
HAIL/WIND E/NE INTO ERN AR/NW MS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 28030.


...CORFIDI

Tornado Watches in Arkansas, 2008Tornado Watches in Louisiana, 2008Tornado Watches in Mississippi, 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.