WWUS20 KWNS 260030
SPC WW 260030
URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 620
NWS Storm Prediction Center Norman OK
630 PM MDT Sun Aug 25 2019
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Western and south-central South Dakota
* Effective this Sunday night and Monday morning from 630 PM
until 100 AM MDT.
* Primary threats include…
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Isolated significant damaging wind gusts to 75 mph possible
SUMMARY…Severe storms will likely continue to increase in
coverage/intensity across northeast Wyoming this evening, and then
spread into southwest/south-central South Dakota later this evening.
Damaging winds and large hail will be possible.
The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 100 miles west of Rapid
City SD to 40 miles south southeast of Pierre SD. 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