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URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 358
NWS Storm Prediction Center Norman OK
705 PM CDT Fri Jul 9 2021
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Extreme northwest Illinois
Extreme northeast Missouri
* Effective this Friday night from 705 PM until Midnight CDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2.5
inches in diameter likely
Scattered damaging wind gusts to 70 mph possible
SUMMARY...A small cluster of elevated storms, some with supercell
structures, may persist for the next few hours while moving
southeastward near the Illinois, Iowa, Missouri border region.
Isolated very large hail and severe wind gusts will be the main
The severe thunderstorm watch area is approximately along and 35
statute miles east and west of a line from 65 miles north northwest
of Burlington IA to 35 miles south southwest of Burlington IA. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU8).
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 356...WW 357...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector