

883 

WWUS20 KWNS 162027

SEL9

SPC WW 162027

IAZ000-KSZ000-NEZ000-170300-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 339

NWS Storm Prediction Center Norman OK

330 PM CDT Fri Jun 16 2017



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  West Central Iowa

  Northern Kansas

  Eastern Nebraska



* Effective this Friday afternoon and evening from 330 PM until

  1000 PM CDT.



* Primary threats include...

  Widespread large hail and isolated very large hail events to 3

    inches in diameter likely

  Widespread damaging winds likely with isolated significant gusts

    to 75 mph possible

  A tornado or two possible



SUMMARY...Thunderstorms will develop across central NE and spread

eastward across the watch area this afternoon and evening.

Supercells with very large hail will be a threat early, with a

transition to more concern for damaging winds this evening.

Isolated tornadoes are also possible.



The severe thunderstorm watch area is approximately along and 85

statute miles east and west of a line from 70 miles south southeast

of Hastings NE to 25 miles west northwest of Sioux City IA. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU9).



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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 338...



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

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

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

29030.



...Hart

