

878 

WWUS20 KWNS 112152

SEL0

SPC WW 112152

IAZ000-MNZ000-NEZ000-SDZ000-120500-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 500

NWS Storm Prediction Center Norman OK

450 PM CDT Sun Oct 11 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  western Iowa

  western Minnesota

  eastern Nebraska

  eastern South Dakota



* Effective this Sunday afternoon from 450 PM until Midnight CDT.



* Primary threats include...

  Scattered damaging wind gusts to 70 mph possible

  Scattered large hail events to 1.5 inches in diameter possible

  A tornado or two possible



SUMMARY...A few severe storms including initially isolated

supercells are expected to evolve into a squall line as they develop

east this evening. Damaging wind and large hail are the primary

threats, though a tornado or two cannot be ruled out.



The severe thunderstorm watch area is approximately along and 75

statute miles east and west of a line from 15 miles east northeast

of Detroit Lakes MN to 35 miles east southeast of Lincoln NE. 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.



&&



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

25035.



...Dial

