109
WWUS20 KWNS 102320
SEL0
SPC WW 102320
ILZ000-INZ000-MIZ000-OHZ000-LEZ000-LMZ000-110600-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 560
NWS STORM PREDICTION CENTER NORMAN OK
720 PM EDT MON AUG 10 2026
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHEAST ILLINOIS
NORTHERN INDIANA
FAR SOUTHERN LOWER MICHIGAN
WESTERN OHIO
LAKE ERIE
LAKE MICHIGAN
* EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 720 PM
UNTIL 200 AM EDT.
* PRIMARY THREATS INCLUDE...
SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE
SUMMARY...THUNDERSTORM COVERAGE AND INTENSITY IS EXPECTED TO
INCREASE OVER THE NEXT FEW HOURS WITHIN THE WARM, MOIST, AND VERY
UNSTABLE AIRMASS IN PLACE ACROSS MUCH OF THE OHIO VALLEY. MODERATE
DEEP-LAYER VERTICAL SHEAR EXTENDS ACROSS THE REGION AS WELL. THESE
ENVIRONMENTAL CONDITIONS WILL SUPPORT ROBUST UPDRAFTS, WITH SOME
DEGREE OF UPDRAFT ORGANIZATION POSSIBLE. DAMAGING GUSTS AND/OR LARGE
HAIL ARE POSSIBLE WITH ANY OF THE MORE ORGANIZED STORMS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 65 MILES WEST SOUTHWEST
OF VALPARAISO IN TO 30 MILES NORTHEAST OF COLUMBUS OH. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU0).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 554...WW 555...WW
556...WW 558...WW 559...
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
28025.
...MOSIER
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