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URGENT - IMMEDIATE BROADCAST REQUESTED

Tornado Watch Number 148

NWS Storm Prediction Center Norman OK

320 PM CDT Wed Apr 19 2017



The NWS Storm Prediction Center has issued a



* Tornado Watch for portions of

  Southwest Iowa

  Northwest Missouri

  East central and southeast Nebraska



* Effective this Wednesday afternoon and evening from 320 PM

  until 1000 PM CDT.



* Primary threats include...

  A few tornadoes likely

  Scattered large hail and isolated very large hail events to 2.5

    inches in diameter likely

  Isolated damaging wind gusts to 70 mph possible



SUMMARY...Severe storms are expected to develop in the next 1-2

hours across southeast Nebraska, and then storms will spread

eastward into Iowa and extreme northwest Missouri through this

evening.  The storm environment will favor semi-discrete supercells

capable of producing isolated very large hail and a few tornadoes,

as well as isolated damaging gusts.



The tornado watch area is approximately along and 60 statute miles

east and west of a line from 40 miles north northeast of Omaha NE to

30 miles southeast of Beatrice NE. For a complete depiction of the

watch see the associated watch outline update (WOUS64 KWNS WOU8).



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 2.5 inches. Extreme turbulence and surface wind

gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean

storm motion vector 26030.



...Thompson

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