Severe Thunderstorm Watch 459

Issued

Jul 4, 2012, 8:10 AM CDT (13:10 UTC)

Expired

Jul 4, 2012, 2:00 PM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

Counties Beltrami County, MN, Clearwater County, MN, Kittson County, MN, Lake of the Woods County, MN, Marshall County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Cavalier County, ND, Grand Forks County, ND, Pembina County, ND, Walsh County, ND

The Fargo/Grand Forks radar (KMVX), 120 km from the middle of the area, began a volume at 13:12 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

30%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

20%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 1384Jul 4, 6:25 AM CDT
• Mesoscale Discussion 1387Jul 4, 12:25 PM CDT

238 
WWUS20 KWNS 041302
SEL9
SPC WW 041302
MNZ000-NDZ000-041900-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 459
NWS STORM PREDICTION CENTER NORMAN OK
800 AM CDT WED JUL 4 2012

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

       NORTHWEST MINNESOTA
       FAR NORTHEAST NORTH DAKOTA

EFFECTIVE THIS WEDNESDAY MORNING AND AFTERNOON FROM 800 AM UNTIL
200 PM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 45
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 70 MILES WEST OF
HALLOCK MINNESOTA TO 40 MILES NORTHEAST OF BEMIDJI MINNESOTA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU9).

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.

DISCUSSION...AN ONGOING CLUSTER OF TSTMS WILL LIKELY PERSIST
EAST-SOUTHEASTWARD FROM FAR NORTHEAST ND INTO NORTHWEST MN THIS
MORNING. THIS COMPLEX SHOULD CONTINUE TO THRIVE WITHIN A RELATIVELY
FAVORABLE ENVIRONMENT NEAR/NORTHEAST OF A WARM FRONT...WHERE
EAST-SOUTHEASTERLY LOW LEVEL FLOW AND RELATIVELY QUICK SURFACE BASED
DESTABILIZATION WILL SUPPORT STRONG/SEVERE TSTM SUSTENANCE THIS
MORNING. SEVERE HAIL/DAMAGING WINDS WILL BE THE PRIMARY HAZARDS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 29040.


...GUYER/MEAD

Severe Thunderstorm Watches in Minnesota, 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.