URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 310
NWS Storm Prediction Center Norman OK
900 PM MDT Sat Jun 10 2017
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Western and central South Dakota
Northeastern Wyoming
* Effective this Saturday night and Sunday morning from 900 PM
until 400 AM MDT.
* Primary threats include...
Scattered damaging winds and isolated significant gusts to 75
mph possible
Isolated large hail events to 1.5 inches in diameter possible
SUMMARY...Thunderstorms should continue to develop and gradually
increase in both coverage and intensity over the Black Hills region,
strengthening to severe levels over the next few hours. A mix of
damaging wind and large hail is expected in the early stages.
Activity then should shift into central South Dakota, assuming more
of an organized wind threat with time late tonight.
The severe thunderstorm watch area is approximately along and 50
statute miles north and south of a line from 65 miles west of Rapid
City SD to 80 miles east northeast of Pierre SD. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU0).
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.
&&
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
26035.
...Edwards
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