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WWUS20 KWNS 081726

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MIZ000-OHZ000-LEZ000-090000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 669

NWS STORM PREDICTION CENTER NORMAN OK

130 PM EDT TUE JUL 8 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR SOUTHEASTERN MICHIGAN

       NORTHERN OHIO

       LAKE ERIE



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 130 PM UNTIL

800 PM EDT.



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 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 55 MILES WEST

SOUTHWEST OF TOLEDO OHIO TO 25 MILES NORTH OF YOUNGSTOWN OHIO.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 668...



DISCUSSION...SMALL MCS CONTINUES TO BECOME MORE ORGANIZED EARLY THIS

AFTERNOON APPROACHING NWRN OH...WITH A VERY WARM AND UNSTABLE AIR

MASS DEVELOPING ACROSS NRN OH.  DEEP LAYER SHEAR AROUND 25 KT

OBSERVED ON AREA VWP/S SUGGESTS STORMS WILL REMAIN

ORGANIZED...POSSIBLY IN THE FORM OF A BOW ECHO...AS ACTIVITY TRACKS

EWD THIS AFTERNOON.  DAMAGING WINDS AND ISOLATED LARGE HAIL WILL BE

PRIMARY SEVERE THREATS.



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 27025.





...EVANS

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