Wednesday, July 25, 2007

WATCHES: Severe Thunderstorm Watch Number 552

WWUS20 KWNS 252316
SEL2
SPC WW 252316
MNZ000-NDZ000-260600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 552
NWS STORM PREDICTION CENTER NORMAN OK
615 PM CDT WED JUL 25 2007

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

PARTS OF NORTHWEST MINNESOTA
PARTS OF EASTERN NORTH DAKOTA

EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 615 PM
UNTIL 100 AM 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 100
STATUTE MILES EAST AND WEST OF A LINE FROM 70 MILES SOUTH
SOUTHEAST OF DEVILS LAKE NORTH DAKOTA TO 25 MILES WEST NORTHWEST
OF ROSEAU MINNESOTA. FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).

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...VERY WARM AND EXTREMELY UNSTABLE AIR MASS ACROSS WATCH
AREA AS COLD FRONT APPROACHES FROM THE WEST. SEVERE THUNDERSTORMS
HAVE DEVELOPED SRN MANITOBA AND ARE EXPECTED TO CONTINUE EXPANDING
E/SEWD INTO THE VERY UNSTABLE AIR MASS. PRIMARY THREAT WILL BE
LARGE HAIL AND DAMAGING DOWNBURSTS WITH MOST INTENSE STORMS.

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 600. MEAN STORM
MOTION VECTOR 27020.


..HALES

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
To unsubscribe from WX-STORM send e-mail to LISTSERV@PO.UIUC.EDU with
"unsub wx-storm" in the body of your message. For more information write chris@lib.siu.edu.

No comments: