Tornado Watch 262

Issued

May 31, 2013, 3:27 PM CDT (20:27 UTC)

Expired

Jun 1, 2013, 12:00 AM CDT

In force

9 hr

Issued by

the Storm Prediction Center

Particularly dangerous situation

Yes

Largest hail expected

4 in

Strongest gust expected

70 kt

The Norman radar (KTLX), 43 km from the middle of the area, began a volume at 20:28 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

90%

One or more EF2 to EF5 tornadoes

70%

Ten or more severe wind reports

90%

One or more gusts of 65 knots or more

50%

Ten or more severe hail reports

95%

One or more hailstones of 2 inches or more

90%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 905May 31, 1:49 PM CDT
• Mesoscale Discussion 907May 31, 2:40 PM CDT
• Mesoscale Discussion 908May 31, 4:58 PM CDT
• Mesoscale Discussion 913May 31, 6:33 PM CDT
• Mesoscale Discussion 915May 31, 8:02 PM CDT
• Mesoscale Discussion 919May 31, 11:08 PM CDT

555 
WWUS20 KWNS 312028
SEL2  
SPC WW 312028
OKZ000-010500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 262
NWS STORM PREDICTION CENTER NORMAN OK
330 PM CDT FRI MAY 31 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  CENTRAL AND NORTHEAST OKLAHOMA

* EFFECTIVE THIS FRIDAY AFTERNOON FROM 330 PM UNTIL MIDNIGHT CDT.

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

* PRIMARY THREATS INCLUDE...
  SEVERAL INTENSE TORNADOES LIKELY
  NUMEROUS VERY LARGE HAIL EVENTS TO 4 INCHES IN DIAMETER LIKELY
  NUMEROUS DAMAGING WIND GUSTS LIKELY WITH SEVERAL SIGNIFICANT
    GUSTS TO 80 MPH POSSIBLE

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 20 MILES WEST NORTHWEST OF
BARTLESVILLE OKLAHOMA TO 30 MILES EAST OF WICHITA FALLS TEXAS. 
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU2).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 260...WW 261...

DISCUSSION...AN EXTREMELY UNSTABLE AIR MASS HAS DEVELOPED ACROSS
MUCH OF CENTRAL/EASTERN OK THIS AFTERNOON.  THIS WILL LIKELY RESULT
IN RAPID DEVELOPMENT OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
EVENING ALONG THE DRYLINE OVER WEST-CENTRAL OK...AND ALONG A WEAK
BOUNDARY EXTENDING NORTHEASTWARD INTO NORTHEAST OK.  DISCRETE
SUPERCELLS CAPABLE OF EXTREMELY LARGE HAIL AND DAMAGING TORNADOES
ARE POSSIBLE.  DAMAGING WINDS WILL BECOME AN INCREASING THREAT
THROUGH THE EVENING.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
600. MEAN STORM MOTION VECTOR 26025.


...HART

Tornado Watches in Oklahoma, 2013Every tornado watch in 2013

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.