

380 

WWUS20 KWNS 252029

SEL4

SPC WW 252029

NEZ000-SDZ000-260400-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 304

NWS Storm Prediction Center Norman OK

330 PM CDT Thu Jun 25 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Central Nebraska

  South central into east central South Dakota



* Effective this Thursday afternoon and evening from 330 PM until

  1100 PM CDT.



* Primary threats include...

  Scattered large hail and isolated very large hail events to 2.5

    inches in diameter possible

  Scattered damaging wind gusts to 70 mph possible

  A tornado or two possible



SUMMARY...Thunderstorm development/intensification is expected this

afternoon from south central into east central South Dakota, as well

as farther southwest into north central and central Nebraska.  The

storm environment will favor a mix of supercells and multicell

clusters, with isolated very large hail possible in the first couple

of hours of any supercell development.  The threat for damaging

winds will increase as storms merge into clusters by this evening.



The severe thunderstorm watch area is approximately along and 75

statute miles east and west of a line from 45 miles west of North

Platte NE to 40 miles northeast of Huron SD. 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 303...



AVIATION...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 550. Mean storm motion vector

29020.



...Thompson

