

541 

WWUS20 KWNS 090120

SEL3

SPC WW 090120

MNZ000-090500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 593

NWS STORM PREDICTION CENTER NORMAN OK

820 PM CDT SUN AUG 8 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST MINNESOTA



EFFECTIVE THIS SUNDAY NIGHT FROM 820 PM UNTIL MIDNIGHT CDT.



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 45

STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES EAST

NORTHEAST OF INTERNATIONAL FALLS MINNESOTA TO 60 MILES SOUTHWEST

OF HIBBING 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...CONTINUE...WW 587...WW 588...WW

589...WW 590...WW 591...WW 592...



DISCUSSION...SCTD SUSTAINED STORMS/SUPERCELLS EXPECTED TO PERSIST

OVER NE MN THROUGH MID-LATE EVE.  ACTIVITY SHOULD CONTINUE TO

DEVELOP SE ALONG WAA ZONE ON WRN EDGE OF COOLER AIR ZONE COVERING

THE ARROWHEAD.  STEEP MID LVL LAPSE RATES AND SEASONABLY RICH LOW

LVL MOISTURE SUGGEST LIKELIHOOD FOR LARGE HAIL AND POSSIBLY A

TORNADO BEFORE INCREASING CIN SLOWLY WEAKENS STORMS LATER TONIGHT.



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 450. MEAN STORM

MOTION VECTOR 29030.





...CORFIDI

