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URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 381
NWS Storm Prediction Center Norman OK
340 PM CDT Thu Jun 29 2017
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Central and eastern Nebraska
Southeast South Dakota
* Effective this Thursday afternoon and evening from 340 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...Storms will continue to increase and intensify across the
region this afternoon near a weak surface low and multiple surface
boundaries. Relatively strong shear and ample buoyancy will support
a large hail risk. A tornado cannot be ruled out, particularly near
a boundary that extends roughly west/east across northeast Nebraska
into western Iowa. Over time, storms will likely merge and move
east-southeastward across east-central/northeast Nebraska and
western Iowa through this evening.
The severe thunderstorm watch area is approximately along and 85
statute miles north and south of a line from 20 miles west of
Burwell NE to 35 miles east northeast of Denison IA. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU1).
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 380...
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 500. Mean storm motion vector