Severe Thunderstorm Watch 83

Issued

Mar 19, 2012, 1:56 AM CDT (06:56 UTC)

Expired

Mar 19, 2012, 5:32 AM CDT

In force

4 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Altus AFB radar (KFDR), 79 km from the middle of the area, began a volume at 06:56 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

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

20%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 281Mar 18, 11:37 PM CDT
• Mesoscale Discussion 282Mar 19, 1:37 AM CDT
• Mesoscale Discussion 285Mar 19, 3:34 AM CDT
• Mesoscale Discussion 286Mar 19, 4:13 AM CDT

966 
WWUS20 KWNS 190657
SEL3
SPC WW 190657
OKZ000-TXZ000-191400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 83
NWS STORM PREDICTION CENTER NORMAN OK
155 AM CDT MON MAR 19 2012

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

       WESTERN OKLAHOMA
       NORTHWEST TEXAS

EFFECTIVE THIS MONDAY MORNING FROM 155 AM UNTIL 900 AM CDT.

HAIL TO 1.5 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 60
STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH
NORTHEAST OF CLINTON OKLAHOMA TO 50 MILES SOUTHWEST OF WICHITA
FALLS TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).

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 81...WW 82...

DISCUSSION...SQUALL LINE WITH EMBEDDED BOWING STRUCTURES IS EXPECTED
TO CONTINUE EWD INTO WRN OK AND NWRN TX EARLY THIS MORNING IN
ADVANCE OF PACIFIC FRONT ADVANCING ACROSS WRN TX.  AMBIENT AIR MASS
REMAINS MOIST AND MODERATELY UNSTABLE WITH MLCAPE OF 1000-1500 J/KG.
 GROWING COLD POOL ATTENDANT TO MCS SHOULD BE SUFFICIENT TO OVERCOME
CAP...ALLOWING FOR RENEWED...VIGOROUS UPDRAFT GROWTH ON THE LEADING
EDGE OF GUST FRONT.  WHILE A BRIEF TORNADO IS POSSIBLE OWING TO THE
STRONG LOW-LEVEL SHEAR...THE INCREASING OUTFLOW-DOMINANCE OF THIS
CONVECTIVE SYSTEM SUGGESTS THAT DAMAGING WINDS AND HAIL WILL BE THE
PRIMARY HAZARDS.

AVIATION...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 24035.


...MEAD

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