Severe Thunderstorm Watch 708

Issued

Aug 1, 2011, 4:57 AM CDT (09:57 UTC)

Expired

Aug 1, 2011, 11:57 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Fargo/Grand Forks radar (KMVX), 139 km from the middle of the area, began a volume at 09:58 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

30%

One or more gusts of 65 knots or more

10%

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

70%

• Mesoscale Discussion 1809Aug 1, 2:31 AM CDT
• Mesoscale Discussion 1812Aug 1, 7:31 AM CDT
• Mesoscale Discussion 1813Aug 1, 10:42 AM CDT
• Mesoscale Discussion 1815Aug 1, 11:29 AM CDT

347 
WWUS20 KWNS 010959
SEL8
SPC WW 010959
MNZ000-NDZ000-SDZ000-011700-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 708
NWS STORM PREDICTION CENTER NORMAN OK
500 AM CDT MON AUG 1 2011

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

       WESTERN AND CENTRAL MINNESOTA
       SOUTHERN AND EASTERN NORTH DAKOTA
       FAR NORTHEAST SOUTH DAKOTA

EFFECTIVE THIS MONDAY MORNING FROM 500 AM UNTIL NOON 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 75
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 10 MILES EAST
NORTHEAST OF SAINT CLOUD MINNESOTA TO 65 MILES WEST NORTHWEST OF
JAMESTOWN 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 707...

DISCUSSION...COMPLEX MCS EXPECTED TO PERSIST OVER PARTS OF THE ERN
DAKOTAS AND MN THROUGH LATER THIS MORNING.  ERN PART OF SYSTEM
SHOULD CONTINUE TO FORWARD PROPAGATE MAINLY SE INTO WRN AND PERHAPS
CNTRL MN...WHILE ELEVATED STORMS CONTINUE TO REGENERATE ATOP COLD
POOL ON WRN SIDE OF CONVECTIVE SYSTEM OVER SRN/ERN ND.  CONTINUING
PRESENCE OF STEEP MID LVL LAPSE RATES...RICH LOW LVL MOISTURE...AND
25-30 KT SWLY LLJ /POSSIBLY ENHANCED BY A DISTURBANCE IN SRN STREAM
JET/ SUGGEST A POTENTIAL FOR SPORADIC LOCALLY DMGG WIND AND HAIL.

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 550. MEAN STORM
MOTION VECTOR 29025.


...CORFIDI

Severe Thunderstorm Watches in Minnesota, 2011Severe Thunderstorm Watches in North Dakota, 2011Severe Thunderstorm Watches in South Dakota, 2011Every severe thunderstorm watch in 2011

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.