Tornado Watch 683

Issued

Jul 11, 2008, 2:26 PM CDT (19:26 UTC)

Expired

Jul 11, 2008, 8:48 PM 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), 128 km from the middle of the area, began a volume at 19:30 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

60%

One or more EF2 to EF5 tornadoes

40%

Ten or more severe wind reports

80%

One or more gusts of 65 knots or more

60%

Ten or more severe hail reports

80%

One or more hailstones of 2 inches or more

60%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 1762Jul 11, 12:37 PM CDT
• Mesoscale Discussion 1763Jul 11, 3:13 PM CDT
• Mesoscale Discussion 1764Jul 11, 4:02 PM CDT
• Mesoscale Discussion 1765Jul 11, 5:50 PM CDT

000
WWUS20 KWNS 111924
SEL3  
SPC WW 111924
MNZ000-NDZ000-SDZ000-120300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 683
NWS STORM PREDICTION CENTER NORMAN OK
225 PM CDT FRI JUL 11 2008

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

       WESTERN AND CENTRAL MINNESOTA
       EASTERN NORTH DAKOTA
       NORTHEAST SOUTH DAKOTA

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 225 PM UNTIL
1000 PM CDT.

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

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE
MILES EAST AND WEST OF A LINE FROM 10 MILES NORTHWEST OF WARROAD
MINNESOTA TO 10 MILES SOUTH SOUTHEAST OF REDWOOD FALLS MINNESOTA.
 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU3).

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.

DISCUSSION...THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG AND AHEAD
OF SURFACE LOW/COLD FRONT OVER EASTERN ND IN THE NEXT COUPLE OF
HOURS...SPREADING EASTWARD INTO MN.  VERY STRONG INSTABILITY AND
FAVORABLE SHEAR PROFILES WILL PROMOTE A RISK OF SUPERCELLS CAPABLE
OF VERY LARGE HAIL AND DAMAGING WINDS...ALONG WITH A FEW TORNADOES
NEAR THE WARM FRONT.  OTHER STORMS WILL LIKELY INTENSIFY SOUTHWARD
ALONG THE COLD FRONT INTO NORTHEAST SD AND CENTRAL MN LATER THIS
AFTERNOON.  ALL STORMS ARE EXPECTED TO ORGANIZE INTO A FAST MOVING
SQUALL LINE AFTER DARK WITH A CONTINUED THREAT OF DAMAGING WINDS AND
HAIL.

AVIATION...TORNADOES AND 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
550. MEAN STORM MOTION VECTOR 27035.


...HART

Tornado Watches in Minnesota, 2008Tornado Watches in North Dakota, 2008Tornado Watches in South Dakota, 2008Every tornado watch in 2008

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.