URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 117
NWS Storm Prediction Center Norman OK
130 PM MDT Wed May 23 2018
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Western South Dakota
* Effective this Wednesday afternoon and evening from 130 PM
until 900 PM MDT.
* 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
SUMMARY...Thunderstorms will continue to intensify over east-central
Colorado/Wyoming and spread northeastward across the watch area this
afternoon and evening. The strongest cells will pose a risk of
large hail and damaging wind gusts.
The severe thunderstorm watch area is approximately along and 60
statute miles east and west of a line from 60 miles southwest of
Sidney NE to 105 miles north northwest of Rapid City SD. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU7).
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
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector