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URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 340
NWS Storm Prediction Center Norman OK
355 PM CDT Fri Jun 16 2017
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Extreme Northeast Nebraska
Extreme Southeast South Dakota
* Effective this Friday afternoon and evening from 355 PM until
1000 PM CDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
A tornado or two possible
SUMMARY...Thunderstorms will continue to develop over the watch area
this afternoon and early evening. The strongest cells will be
capable of large hail and damaging winds.
The severe thunderstorm watch area is approximately along and 50
statute miles north and south of a line from 35 miles north
northwest of Sioux City IA to 35 miles northeast of Lonerock WI. For
a complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU0).
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
OTHER WATCH INFORMATION...CONTINUE...WW 338...WW 339...
AVIATION...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 500. Mean storm motion vector