Severe Thunderstorm Watch 458

Issued

Jul 3, 2012, 5:52 PM MDT (23:52 UTC)

Expired

Jul 4, 2012, 2:00 AM MDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

65 kt

Two or more tornadoes

20%

One or more EF2 to EF5 tornadoes

5%

Ten or more severe wind reports

40%

One or more gusts of 65 knots or more

40%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

40%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 1379Jul 3, 5:15 PM MDT
• Mesoscale Discussion 1382Jul 3, 9:34 PM MDT
• Mesoscale Discussion 1383Jul 4, 1:32 AM MDT

325 
WWUS20 KWNS 032353
SEL8
SPC WW 032353
NDZ000-040600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 458
NWS STORM PREDICTION CENTER NORMAN OK
555 PM MDT TUE JUL 3 2012

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

       WESTERN AND CENTRAL NORTH DAKOTA

EFFECTIVE THIS TUESDAY AFTERNOON FROM 555 PM UNTIL MIDNIGHT MDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 105
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES SOUTH
SOUTHWEST OF WILLISTON NORTH DAKOTA TO 70 MILES NORTHEAST OF
BISMARCK NORTH DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).

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 457...

DISCUSSION...GROWING MCS OVER ERN MT AND WW 457 SHOULD MOVE INTO
ND...CONTINUING ITS RISK OF DAMAGING GUSTS AND OCNL HAIL.
CONVECTIVE COVERAGE AND SVR POTENTIAL ARE MORE UNCERTAIN WITH SWD
EXTENT ACROSS WW AREA...HOWEVER PRESENCE OF GREATEST
MOISTURE/INSTABILITY AND WEAKEST MLCINH OVER THAT AREA INDICATE
BACKBUILDING POTENTIAL AS COMPLEX PROCEEDS EWD.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 27030.


...EDWARDS

Severe Thunderstorm Watches in North Dakota, 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.