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URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 487
NWS Storm Prediction Center Norman OK
400 AM CDT Sat Jul 23 2022
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Extreme northwestern Indiana
Extreme southern Wisconsin
* Effective this Saturday morning from 400 AM until 1000 AM CDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Isolated large hail events to 1.5 inches in diameter possible
SUMMARY...An increasingly organized cluster of thunderstorms moving
into northwestern IL, the northern gust front of which produced a
measured 54-kt gust at DBQ, is expanding and moving into a favorably
moist/unstable airmass west of a separate convective cluster along
the southwest shore of Lake Michigan. The western complex may
continue to pose a severe-gust threat as it crosses the watch area
The severe thunderstorm watch area is approximately along and 45
statute miles north and south of a line from 60 miles west of
Rockford IL to 70 miles east of Rockford IL. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU7).
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
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 550. Mean storm motion vector