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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