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WWUS20 KWNS 171706

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SPC WW 171706

IAZ000-KSZ000-MOZ000-NEZ000-180000-



URGENT - IMMEDIATE BROADCAST REQUESTED

Tornado Watch Number 231

NWS Storm Prediction Center Norman OK

1205 PM CDT Wed May 17 2017



The NWS Storm Prediction Center has issued a



* Tornado Watch for portions of

  much of western and central Iowa

  parts of northeast Kansas

  portions of northern Missouri

  parts of eastern Nebraska



* Effective this Wednesday afternoon and evening from 1205 PM

  until 700 PM CDT.



* Primary threats include...

  A few tornadoes and a couple intense tornadoes possible

  Isolated very large hail events to 2 inches in diameter possible

  Isolated damaging wind gusts to 70 mph possible



SUMMARY...Thunderstorms have begun to develop early this afternoon

across parts of north-central Kansas and into the mid-Missouri

Valley area, and should continue expanding/spreading northeast

across the WW area over the next several hours.  Large hail and

locally damaging winds will be possible, along with a few tornadoes

this afternoon and into the early evening hours.



The tornado watch area is approximately along and 115 statute miles

north and south of a line from 5 miles west northwest of Beatrice NE

to 5 miles east northeast of Knoxville IA. For a complete depiction

of the watch see the associated watch outline update (WOUS64 KWNS

WOU1).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A Tornado Watch means conditions are favorable for

tornadoes and 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.



&&



AVIATION...Tornadoes and a few severe thunderstorms with hail

surface and aloft to 2 inches. Extreme turbulence and surface wind

gusts to 60 knots. A few cumulonimbi with maximum tops to 450. Mean

storm motion vector 21040.



...Goss

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