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URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 489
NWS Storm Prediction Center Norman OK
110 PM CDT Tue Sep 7 2021
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
* Effective this Tuesday afternoon and evening from 110 PM until
900 PM CDT.
* Primary threats include...
Scattered large hail likely with isolated very large hail events
to 2 inches in diameter possible
Scattered damaging wind gusts to 70 mph likely
SUMMARY...A line of thunderstorms currently developing from northern
Illinois into eastern Iowa will spread across the watch area this
afternoon and early evening. Damaging winds and hail will be
possible with the strongest cells.
The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 85 miles east of
Marseilles IL to 45 miles west northwest of Peoria IL. 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
OTHER WATCH INFORMATION...CONTINUE...WW 488...
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 500. Mean storm motion vector