

646 

WWUS20 KWNS 171536

SEL5

SPC WW 171536

IAZ000-MOZ000-180000-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 515

NWS Storm Prediction Center Norman OK

1040 AM CDT Wed Jul 17 2019



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Iowa

  Far Northeast Missouri



* Effective this Wednesday morning and evening from 1040 AM until

  700 PM CDT.



* Primary threats include...

  Scattered damaging winds likely with isolated significant gusts

    to 75 mph possible

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  A tornado or two possible



SUMMARY...A line of storms across west-central/north-central Iowa

around 1030 AM CDT should continue to intensify as it progresses

east-southeastward through the afternoon within an increasingly

unstable environment. Damaging winds will be an increasing concern

along with isolated large hail.



The severe thunderstorm watch area is approximately along and 70

statute miles north and south of a line from 40 miles west of Des

Moines IA to 35 miles southeast of Cedar Rapids IA. 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 65 knots. A

few cumulonimbi with maximum tops to 650. Mean storm motion vector

28035.



...Guyer

