Tornado Watch 345

Issued

Jun 3, 2012, 3:28 PM CDT (20:28 UTC)

Expired

Jun 3, 2012, 9:40 PM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

60 kt

The Springfield radar (KSGF), 119 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

30%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

40%

Ten or more severe hail reports

50%

One or more hailstones of 2 inches or more

60%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 1030Jun 3, 2:27 PM CDT
• Mesoscale Discussion 1036Jun 3, 5:02 PM CDT
• Mesoscale Discussion 1039Jun 3, 7:47 PM CDT
• Mesoscale Discussion 1042Jun 3, 8:34 PM CDT

823 
WWUS20 KWNS 032033
SEL5
SPC WW 032033
ARZ000-MOZ000-OKZ000-040400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 345
NWS STORM PREDICTION CENTER NORMAN OK
330 PM CDT SUN JUN 3 2012

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

       NORTHERN ARKANSAS
       EXTREME SOUTHERN MISSOURI
       EXTREME NORTHEAST OKLAHOMA

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 330 PM UNTIL
1100 PM CDT.

TORNADOES...HAIL TO 2.5 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 55 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 40 MILES SOUTH SOUTHWEST OF
GROVE OKLAHOMA TO 30 MILES EAST NORTHEAST OF BATESVILLE ARKANSAS.
 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU5).

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 344...

DISCUSSION...LATEST GUIDANCE HAS SUGGESTED A MORE RAPID ONSET OF
DEEP CONVECTION ACROSS THE WATCH AREA IN THE NEXT 1-2 HOURS.
MAGNITUDE OF INSTABILITY /MLCAPE AROUND 3000 J PER KG/ WILL
CONTRIBUTE TO STOUT UPDRAFTS WHERE 30-40KT EFFECTIVE VERTICAL SHEAR
WILL CONTRIBUTE TO STORM ROTATION AND PERSISTENCE. THIS ENVIRONMENT
WILL CLEARLY SUPPORT VERY LARGE HAIL AND DAMAGING WINDS. TORNADO
POTENTIAL IS A BIT MORE SUBTLE BUT SUBSTANTIAL ENOUGH TO WARRANT A
TORNADO WATCH. THIS POTENTIAL MAY EVOLVE ALONG THE WARM FRONT
SITUATED WEST TO EAST ALONG THE CENTER OF THE WATCH AREA....SOUTH OF
THE MO BORDER. ENHANCED LOW LEVEL SHEAR ALONG AND IMMEDIATELY TO THE
NORTH OF THIS BOUNDARY IS SUFFICIENT TO RESULT IN STRONGER LOW LEVEL
STORM ROTATION AND THE CHANCE OF A TORNADIC SUPERCELL OR TWO INTO
THE EVENING BEFORE STORMS MERGE AND SPREAD EAST ALONG AND SOUTH OF
THE MO/AR BORDER.

AVIATION...TORNADOES AND 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 27030.


...CARBIN

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