Tornado Watch 446

Issued

Jun 23, 2007, 9:24 PM CDT (02:24 UTC)

Expired

Jun 24, 2007, 2:51 AM CDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

Two or more tornadoes

40%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

40%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 1264Jun 23, 8:46 PM CDT

000
WWUS20 KWNS 240227
SEL6  
SPC WW 240227
MNZ000-NDZ000-241000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 446
NWS STORM PREDICTION CENTER NORMAN OK
925 PM CDT SAT JUN 23 2007

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

       NORTHWEST MINNESOTA
       NORTHEAST NORTH DAKOTA

EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 925 PM
UNTIL 500 AM CDT.

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

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 65 MILES WEST NORTHWEST OF
DEVILS LAKE NORTH DAKOTA TO 75 MILES EAST NORTHEAST OF BEMIDJI
MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).

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...CLUSTER OF SUPERCELLS WITH A HISTORY OF TORNADOES OVER
SWRN MB ARE EXPECTED TO CONTINUE SEWD OVERNIGHT INTO PORTIONS OF
NERN ND AND NWRN MN.  COMBINATION OF MLCAPES OF 1500-2500 J/KG AND
MODERATELY STRONG LOW AND DEEP-LAYER SHEAR ALONG AND S OF WARM
FRONT/OUTFLOW BOUNDARY SHOULD MAINTAIN STORM INTENSITY WITH A THREAT
OF A FEW TORNADOES IN ADDITION TO LARGE HAIL AND DAMAGING WINDS. 
ACTIVITY MAY GROW UPSCALE INTO AN MCS EARLY SUNDAY MORNING WITH A
CONTINUED THREAT OF DAMAGING WINDS AND LARGE HAIL.

AVIATION...TORNADOES AND 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 29025.


...MEAD/HALES

Tornado Watches in North Dakota, 2007Tornado Watches in Minnesota, 2007Every tornado watch in 2007

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.