

000 

WWUS20 KWNS 180448

SEL3

SPC WW 180448

MNZ000-181000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 413

NWS STORM PREDICTION CENTER NORMAN OK

1150 PM CDT SUN JUN 17 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHWEST MINNESOTA



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 1150 PM UNTIL

500 AM CDT.



HAIL TO 1.5 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 50

STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES WEST

NORTHWEST OF ROSEAU MINNESOTA TO 50 MILES SOUTH OF DETROIT LAKES

MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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...THIS SEVERE THUNDERSTORM WATCH REPLACES

TORNADO WATCH NUMBER 410...TORNADO WATCH NUMBER 412. WATCH NUMBER

410 412 WILL NOT BE IN EFFECT AFTER 1150 PM CDT. CONTINUE...WW

411...



DISCUSSION...A SURFACE LOW WILL DEVELOP NNEWD INTO SE

MANITOBA...WHILE A TRAILING COLD FRONT SURGES EWD FROM ND INTO MN.

A LINE OF STRONG/SEVERE THUNDERSTORMS WILL LIKELY PERSIST NEAR AND E

OF THE COLD FRONT...WHERE MODERATE INSTABILITY AND STRONG LOW-LEVEL

FLOW WILL CONTRIBUTE TO A CONTINUED THREAT FOR DAMAGING WINDS.  THE

STRONGEST STORMS MAY ALSO PRODUCE ISOLATED LARGE HAIL FOR THE NEXT

FEW HOURS.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 25040.





...THOMPSON

