WWUS20 KWNS 202236

SEL4  

SPC WW 202236

IAZ000-ILZ000-MOZ000-210400-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 504

NWS Storm Prediction Center Norman OK

540 PM CDT Mon Jul 20 2026



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of 

  East Central Iowa

  Northwest Illinois

  Northeast Missouri



* Effective this Monday afternoon and evening from 540 PM until

  1100 PM CDT.



* Primary threats include...

  Scattered damaging winds and isolated significant gusts to 80

    mph likely

  Isolated very large hail events to 2 inches in diameter possible



SUMMARY...A fast-moving bowing line of thunderstorms over eastern

Iowa will track southeastward across the watch area this evening,

with a risk of severe wind gusts and hail.



The severe thunderstorm watch area is approximately along and 55

statute miles either side of a line from 45 miles north northwest of

Burlington IA to 15 miles east southeast of Peoria IL. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU4).



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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 500...WW 501...



AVIATION...A few severe thunderstorms with hail surface and aloft to

2 inches. Extreme turbulence and surface wind gusts to 70 knots. A

few cumulonimbi with maximum tops to 500. Mean storm motion vector

30035.



...Hart