SPC WW 301842
MIZ000-MNZ000-WIZ000-LMZ000-LSZ000-310100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 355
STORM PREDICTION CENTER NORMAN OK
142 PM CDT THU MAY 30 2002

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

UPPER MICHIGAN
THE MINNESOTA ARROWHEAD
NORTHERN AND EASTERN WISCONSIN
WESTERN LAKE MICHIGAN
WESTERN ADN SOUTHERN LAKE SUPERIOR

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 200 PM UNTIL 800
PM CDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 105 STATUTE MILES EITHER SIDE
OF A LINE FROM 45 MILES NORTH OF DULUTH MINNESOTA TO 55 MILES SOUTH
SOUTHEAST OF ESCANABA MICHIGAN.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

DISCUSSION...SUPERCELLS/SUPERCELL CLUSTERS EXPECTED TO DEVELOP
INVOF SURFACE TRIPLE POINT AND CONVECTIVE OUTFLOW BOUNDARIES IN WW
AREA LATER THIS AFTERNOON AS SURFACE HEATING CONTINUES TO
DESTABILIZE REGION. WNWLY UPPER FLOW WILL STRENGTHEN WITH TIME...
INCREASING DEEP SHEAR AND CONTINUING TO ADVECT STEEP MID LEVEL
LAPSE RATES ACROSS REGION. TORNADO POTENTIAL SHOULD BE GREATEST
OVER NRN/ERN WI AND WRN UPR MI...ESPECIALLY INVOF ANY NW-SE
ORIENTED OUTFLOW BOUNDARIES.

AVIATION...TORNADOES AND 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 500.
MEAN STORM MOTION VECTOR 29030.

...CORFIDI
;433,0873 460,0930 485,0911 462,0854;
NNNN

ZCZC SPCSEL6 ALL 310100;283,0981 255,0972 255,0985 283,0994;
WWUS20 KWNS 301957
SPC WW 301957
TXZ000-310100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 356
STORM PREDICTION CENTER NORMAN OK
257 PM CDT THU MAY 30 2002

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

DEEP SOUTH TEXAS

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 300 PM UNTIL 800
PM CDT.

HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 45 STATUTE MILES
EAST AND WEST OF A LINE FROM 20 MILES NORTHEAST OF COTULLA TEXAS TO
15 MILES SOUTH SOUTHEAST OF MCALLEN TEXAS.

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 355...

DISCUSSION...THUNDERSTORMS/POSSIBLE SUPERCELLS EXPECTED TO
INTENSIFY ALONG N-S SURFACE TROUGH FROM NEAR COT TO MFE DURING THE
NEXT COUPLE OF HOURS. VERY STEEP LOW TO MID LEVEL LAPSE RATES AND
RICH BOUNDARY LAYER MOISTURE WILL SUPPORT A THREAT FOR VERY LARGE
HAIL/HIGH WINDS AND POSSIBLY A TORNADO.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 34030.

...CORFIDI
;283,0981 255,0972 255,0985 283,0994;
NNNN