Tornado Watch 664

Issued

Oct 13, 2012, 5:57 PM CDT (22:57 UTC)

Expired

Oct 14, 2012, 12:00 AM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Tulsa radar (KINX), 17 km from the middle of the area, began a volume at 22:58 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

30%

Ten or more severe wind reports

70%

One or more gusts of 65 knots or more

50%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 2048Oct 13, 2:55 PM CDT
• Mesoscale Discussion 2052Oct 13, 6:59 PM CDT
• Mesoscale Discussion 2055Oct 13, 9:37 PM CDT

639 
WWUS20 KWNS 132256
SEL4
SPC WW 132256
ARZ000-KSZ000-MOZ000-OKZ000-140500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 664
NWS STORM PREDICTION CENTER NORMAN OK
600 PM CDT SAT OCT 13 2012

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

       NORTHWEST ARKANSAS
       SOUTHEAST KANSAS
       SOUTHWEST MISSOURI
       EASTERN OKLAHOMA

EFFECTIVE THIS SATURDAY NIGHT FROM 600 PM UNTIL MIDNIGHT CDT.

TORNADOES...HAIL TO 1.5 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 85 STATUTE
MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH NORTHWEST OF
JOPLIN MISSOURI TO 55 MILES SOUTH OF MCALESTER OKLAHOMA.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU4).

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 661...WW 662...WW 663...

DISCUSSION...A BROKEN LINE OF STRONG/SEVERE STORMS IS TRACKING
RAPIDLY NORTHEASTWARD.  STRONG LOW/MID LEVEL WINDS AND SUFFICIENT
CAPE VALUES WILL PROVIDE A RISK OF ISOLATED INTENSE STORMS THROUGH
THE EVENING...ALONG WITH THE POTENTIAL FOR A TORNADO OR TWO.

AVIATION...TORNADOES AND 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 23035.


...HART

Tornado Watches in Oklahoma, 2012Tornado Watches in Missouri, 2012Tornado Watches in Arkansas, 2012Every tornado 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.