

000 

WWUS20 KWNS 160500

SEL1

SPC WW 160500

OHZ000-160900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 601

NWS STORM PREDICTION CENTER NORMAN OK

100 AM EDT THU AUG 16 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN AND CENTRAL OHIO



EFFECTIVE THIS THURSDAY MORNING FROM 100 AM UNTIL 500 AM EDT.



HAIL TO 1 INCH 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 NORTH AND SOUTH OF A LINE FROM 45 MILES NORTHWEST

OF DAYTON OHIO TO 40 MILES EAST NORTHEAST OF COLUMBUS OHIO.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 600...



DISCUSSION...AREA WIND PROFILES AND INSTABILITY PATTERN SUGGEST THAT

NRN IND MCS WILL CONTINUE TO EXHIBIT BOTH FORWARD AND REAR

PROPAGATION THROUGH EARLY THIS MORNING.  GIVEN DEGREE OF PREVAILING

INSTABILITY IN INFLOW ENVIRONMENT ACROSS IL AND SRN IND...AND ELY

COMPONENT TO NEAR-SFC FLOW IN OH...BOWING PART OF SYSTEM MAY

CONTINUE TO PRODUCE DAMAGING WIND GUSTS AND PERHAPS A BRIEF TORNADO

EWD INTO OH.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION

VECTOR 30035.





...CORFIDI

