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WWUS20 KWNS 220801

SEL4

SPC WW 220801

MNZ000-NDZ000-221400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 844

NWS STORM PREDICTION CENTER NORMAN OK

300 AM CDT FRI AUG 22 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHWEST MINNESOTA

       CENTRAL AND NORTHEASTERN NORTH DAKOTA



EFFECTIVE THIS FRIDAY MORNING FROM 300 AM UNTIL 900 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 80

STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES SOUTH

SOUTHWEST OF DEVILS LAKE NORTH DAKOTA TO 65 MILES NORTH NORTHEAST

OF DEVILS LAKE NORTH DAKOTA.  FOR A COMPLETE DEPICTION OF THE

WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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.



DISCUSSION...SMALL...SLIGHTLY ELEVATED...BOWING MCS OVER CNTRL ND

EXPECTED TO CONTINUE NEWD THROUGH LATER THIS MORNING AS UVV AND DEEP

WIND FIELD STRENGTHEN DOWNSTREAM FROM ERN MT UPR IMPULSE.  PRESENCE

OF DEEP EML AND INCREASING LOW LVL MOISTURE INFLOW SUGGEST POTENTIAL

FOR ISOLD DMGG WIND AND HAIL DESPITE TIME OF DAY.



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 24040.





...CORFIDI

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