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URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 419
NWS Storm Prediction Center Norman OK
205 PM CDT Tue Aug 10 2021
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
A small part of northwestern Illinois
* Effective this Tuesday afternoon and evening from 205 PM until
800 PM CDT.
* Primary threats include...
Scattered damaging winds and isolated significant gusts to 75
Scattered large hail events to 1.5 inches in diameter possible
SUMMARY...Thunderstorms are forming across parts of central and
northeastern Iowa, and these storms have the potential to increase
in both coverage and intensity through the afternoon. The storm
environment appears favorable for storm clusters capable of
producing isolated significant severe outflow gusts to 75 mph and
isolated large hail.
The severe thunderstorm watch area is approximately along and 50
statute miles east and west of a line from 80 miles north northwest
of Dubuque IA to 20 miles west southwest of Burlington IA. 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
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 600. Mean storm motion vector