URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 460
NWS Storm Prediction Center Norman OK
530 PM MDT Thu Aug 27 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southeast Montana
Southwest North Dakota
Western and Central South Dakota
Northeast Wyoming
* Effective this Thursday afternoon and Friday morning from 530
PM until 100 AM MDT.
* Primary threats include...
Scattered damaging winds likely with isolated significant gusts
to 80 mph possible
Scattered large hail likely with isolated very large hail events
to 3 inches in diameter possible
A tornado or two possible
SUMMARY...Initially isolated severe thunderstorms including
supercells are expected to further develop and increase across the
region this evening. By late evening, one or more
eastward-accelerating clusters should evolve with an increasing wind
damage risk across South Dakota/southern North Dakota.
The severe thunderstorm watch area is approximately along and 120
statute miles east and west of a line from 45 miles north northeast
of Baker MT to 80 miles south southeast of Rapid City 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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 456...WW 457...WW
458...WW 459...
AVIATION...A few severe thunderstorms with hail surface and aloft to
3 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
28020.
...Guyer
Read morefrom SPC Forecast Products http://www.spc.noaa.gov/products/watch/ww0460.html
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