SPC Severe Thunderstorm Watch 675
Tue, 21 Sep 2010 02:05:03 -0500
URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 675 NWS STORM PREDICTION CENTER NORMAN OK 205 AM CDT TUE SEP 21 2010 THE NWS STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF WESTERN UPPER MICHIGAN EASTERN MINNESOTA NORTHERN AND WESTERN WISCONSIN LAKE SUPERIOR EFFECTIVE THIS TUESDAY MORNING FROM 205 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 60 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST OF MINNEAPOLIS MINNESOTA TO 65 MILES EAST OF IRONWOOD MICHIGAN. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5). 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...TSTMS HAVE INCREASED IN THE PAST 30 MINUTES OVER ERN MN...POSSIBLY IN REFLECTING FACT THAT FORCING WITH SRN STREAM SHORTWAVE IMPULSE APPEARS TO HAVE ENCOUNTERED RESERVOIR OF HIGHER PW OVER WW REGION. STRENGTH OF CLOUD LAYER SHEAR AND STEEP MID LVL LAPSE RATES SUGGEST POTENTIAL FOR SVR HAIL AND POSSIBLY SMALL BOWING SEGMENTS WITH HIGH WIND AS FORCING CONTINUES NEWD. 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 450. MEAN STORM MOTION VECTOR 23035. ...CORFIDIRead more
SPC Severe Thunderstorm Watch 675 Status Reports
Tue, 21 Sep 2010 02:05:12 -0500
STATUS FOR WATCH 0675 HAS NOT BEEN ISSUED YETRead more
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