

267 

WWUS20 KWNS 111500

SEL5

SPC WW 111500

IAZ000-ILZ000-112100-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 355

NWS Storm Prediction Center Norman OK

1000 AM CDT Sat Jul 11 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Eastern Iowa

  Northwest Illinois



* Effective this Saturday morning and afternoon from 1000 AM

  until 400 PM CDT.



* Primary threats include...

  Isolated very large hail events to 2 inches in diameter possible

  Isolated damaging wind gusts to 70 mph possible



SUMMARY...A small but intense storm cluster may persist

southeastward and somewhat increase in size/coverage late this

morning through early afternoon as it moves across eastern Iowa

toward the Quad Cities vicinity. Large hail and damaging winds will

be possible, at least on an isolated basis.



The severe thunderstorm watch area is approximately along and 55

statute miles north and south of a line from 35 miles southwest of

Cedar Rapids IA to 45 miles east of Moline IL. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU5).



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.



&&



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

32030.



...Guyer

