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URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 163
NWS Storm Prediction Center Norman OK
140 PM MDT Fri Jun 8 2018
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Far southeast Montana
Western South Dakota
* Effective this Friday afternoon and evening from 140 PM until
1000 PM MDT.
* Primary threats include...
Scattered damaging winds and isolated significant gusts to 75
Scattered large hail and isolated very large hail events to 3
inches in diameter possible
A tornado or two possible
SUMMARY...Isolated to scattered storms will develop off the Black
Hills and central High Plains regions through this evening. Large
hail, a tornado, and isolated severe wind gusts will be the primary
hazards initially. Storms should eventually grow into clusters and
lines with an increasing wind risk towards sunset.
The severe thunderstorm watch area is approximately along and 90
statute miles east and west of a line from 105 miles north of Rapid
City SD to 15 miles south southwest of Chadron NE. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU3).
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
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