

000 

WWUS20 KWNS 110412

SEL1

SPC WW 110412

MNZ000-NDZ000-111200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 681

NWS STORM PREDICTION CENTER NORMAN OK

1015 PM CST THU JUL 10 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF NORTHWEST MINNESOTA

       MUCH OF NORTHERN NORTH DAKOTA



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 1015 PM

UNTIL 600 AM CST.



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 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 70 MILES WEST OF

MINOT NORTH DAKOTA TO 55 MILES SOUTHEAST OF WARROAD MINNESOTA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 678. WATCH NUMBER 678 WILL NOT BE IN EFFECT

AFTER 1015 PM CST. CONTINUE...WW 679...WW 680...



DISCUSSION...SEVERE THUNDERSTORMS ARE EXPECTED TO DEVELOP AND SPREAD

EWD ACROSS THE WATCH AREA OVERNIGHT WITH THE APPROACH OF

UNSEASONABLY STRONG UPPER TROUGH AND SURFACE LOW.  WITH THE

AVAILABLE MOIST AND MDTLY UNSTABLE AIR...AND VEERING SHEAR

PROFILES.,.SUPERCELLS AND POSSIBLE ENHANCING THE THREAT FOR DAMAGING

WINDS AND LARGE 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 27035.





...HALES

