Severe Thunderstorm Watch 150

Issued

Apr 7, 2012, 3:01 PM CDT (20:01 UTC)

Expired

Apr 8, 2012, 12:00 AM CDT

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

Two or more tornadoes

20%

One or more EF2 to EF5 tornadoes

5%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

90%

One or more hailstones of 2 inches or more

50%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 473Apr 7, 2:29 PM CDT
• Mesoscale Discussion 474Apr 7, 6:41 PM CDT
• Mesoscale Discussion 475Apr 7, 9:53 PM CDT

975 
WWUS20 KWNS 072002
SEL0
SPC WW 072002
TXZ000-080300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 150
NWS STORM PREDICTION CENTER NORMAN OK
300 PM CDT SAT APR 7 2012

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

       WESTERN AND NORTH CENTRAL TEXAS

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 300 PM UNTIL
1000 PM CDT.

HAIL TO 2 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 55 MILES SOUTH
SOUTHWEST OF FORT STOCKTON TEXAS TO 25 MILES NORTH OF MINERAL
WELLS TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).

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.

DISCUSSION...SCATTERED THUNDERSTORMS HAVE BEGUN TO FORM ALONG A COLD
FRONT OVER NORTH CENTRAL TX.  THESE STORMS WILL SPREAD SLOWLY
EASTWARD ACROSS AN AXIS OF MODERATE INSTABILITY AND SUFFICIENT
VERTICAL SHEAR TO PROMOTE ORGANIZED/SEVERE STORMS.  OTHER STORMS ARE
FORMING OVER THE DAVIS MTNS OF SOUTHWEST TX.  STEEP MID LEVEL LAPSE
RATES SUGGEST THAT LARGE HAIL AND DAMAGING WINDS WILL BE POSSIBLE IN
THE STRONGER STORMS THROUGH THE EVENING.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 27025.


...HART

Severe Thunderstorm Watches in Texas, 2012Every severe thunderstorm watch in 2012

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.