

402 

WWUS20 KWNS 170946

SEL4

SPC WW 170946

IAZ000-NEZ000-SDZ000-171500-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 514

NWS Storm Prediction Center Norman OK

450 AM CDT Wed Jul 17 2019



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northwest Iowa

  Northeast Nebraska

  Southeast South Dakota



* Effective this Wednesday morning from 450 AM until 1000 AM CDT.



* Primary threats include...

  Scattered damaging winds likely with isolated significant gusts

    to 75 mph possible

  Scattered large hail events to 1.5 inches in diameter possible



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

South Dakota will track across the watch area this morning, posing a

risk of damaging winds and hail.



The severe thunderstorm watch area is approximately along and 40

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

Yankton SD to 25 miles east southeast of Storm Lake IA. 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.



&&



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

1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A

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

28040.



...Hart

