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WWUS20 KWNS 122034

SEL0

SPC WW 122034

IAZ000-ILZ000-130300-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 650

NWS Storm Prediction Center Norman OK

335 PM CDT Thu Sep 12 2019



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Central and Eastern Iowa

  Northwest Illinois



* Effective this Thursday afternoon and evening from 335 PM until

  1000 PM CDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph possible

  Scattered large hail events to 1.5 inches in diameter possible



SUMMARY...Thunderstorms are forming along a cold front moving into

western Iowa.  These storms will track across the watch area through

the early evening, posing a risk of hail and damaging wind gusts.



The severe thunderstorm watch area is approximately along and 100

statute miles east and west of a line from 30 miles north of

Waterloo IA to 35 miles south southwest of Ottumwa IA. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU0).



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 648...WW 649...



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

1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A

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

25030.



...Hart

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