Severe Thunderstorm Watch 152

Issued

Apr 9, 2012, 3:23 PM CDT (20:23 UTC)

Expired

Apr 9, 2012, 11:00 PM CDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

60 kt

The Amarillo radar (KAMA), 91 km from the middle of the area, began a volume at 20:25 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

60%

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 478Apr 9, 1:54 PM CDT
• Mesoscale Discussion 479Apr 9, 3:06 PM CDT
• Mesoscale Discussion 481Apr 9, 5:37 PM CDT
• Mesoscale Discussion 482Apr 9, 7:33 PM CDT
• Mesoscale Discussion 484Apr 9, 8:54 PM CDT

614 
WWUS20 KWNS 092024
SEL2
SPC WW 092024
OKZ000-TXZ000-100400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 152
NWS STORM PREDICTION CENTER NORMAN OK
325 PM CDT MON APR 9 2012

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

       SOUTHWEST OKLAHOMA
       WEST TEXAS INCLUDING THE PANHANDLE

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 325 PM UNTIL
1100 PM CDT.

HAIL TO 2.5 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 100
STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHWEST OF
CLINTON OKLAHOMA TO 30 MILES EAST SOUTHEAST OF LUBBOCK TEXAS.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU2).

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 151...

DISCUSSION...THUNDERSTORMS ARE INTENSIFYING THIS AFTERNOON ACROSS
WEST TX AS WEAK ASCENT SPREADS EASTWARD INTO A MODERATELY UNSTABLE
AIR MASS.  STEEP LOW/MID LEVEL LAPSE RATES AND SUFFICIENT EFFECTIVE
SHEAR WILL PROMOTE A RISK OF ORGANIZED/SUPERCELL STORMS CAPABLE OF
LARGE HAIL AND DAMAGING WINDS PERSISTING THROUGH MUCH OF THE
EVENING.

AVIATION...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 27025.


...HART

Severe Thunderstorm Watches in Texas, 2012Severe Thunderstorm Watches in Oklahoma, 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; radar from the NEXRAD Level II archive.