Severe Thunderstorm Watch 455

Issued

Jul 2, 2012, 6:54 PM CDT (23:54 UTC)

Expired

Jul 3, 2012, 1:00 AM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

3 in

Strongest gust expected

70 kt

The Fargo/Grand Forks radar (KMVX), 182 km from the middle of the area, began a volume at 23:58 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

20%

One or more EF2 to EF5 tornadoes

5%

Ten or more severe wind reports

80%

One or more gusts of 65 knots or more

70%

Ten or more severe hail reports

80%

One or more hailstones of 2 inches or more

70%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1363Jul 2, 3:33 PM CDT
• Mesoscale Discussion 1366Jul 2, 6:40 PM CDT
• Mesoscale Discussion 1369Jul 2, 9:17 PM CDT
• Mesoscale Discussion 1370Jul 2, 11:17 PM CDT

765 
WWUS20 KWNS 022355
SEL5  
SPC WW 022355
MNZ000-NDZ000-WIZ000-LSZ000-030600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 455
NWS STORM PREDICTION CENTER NORMAN OK
655 PM CDT MON JUL 2 2012

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

       NORTHERN MINNESOTA
       FAR EASTERN NORTH DAKOTA
       NORTHWEST WISCONSIN
       LAKE SUPERIOR

EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 655 PM UNTIL
100 AM CDT.

HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST OF
GRAND FORKS NORTH DAKOTA TO 25 MILES NORTH NORTHEAST OF KENNEDY
WISCONSIN.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

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 454...

DISCUSSION...A LARGE CLUSTER OF THUNDERSTORMS IS INTENSIFYING OVER
NORTH CENTRAL MN...WHILE MORE ISOLATED CELLS FORM OVER NORTHEAST ND.
 THE STORMS OVER MN WILL LIKELY ACCELERATE EASTWARD TOWARD THE DLH
AREA OVER THE NEXT FEW HOURS AS ACTIVITY MOVES THROUGH AN EXTREMELY
MOIST AND UNSTABLE AIR MASS.  THE POTENTIAL EXISTS FOR A CORRIDOR OF
WIDESPREAD DAMAGING WINDS AND VERY LARGE HAIL ACROSS PORTIONS OF THE
WATCH AREA.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 29035.


...HART

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