WW 441 SEVERE TSTM MT SD WY 032100Z – 040600Z
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 441
NWS Storm Prediction Center Norman OK
300 PM MDT Mon Jul 3 2023
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Far southeast Montana
Western South Dakota
Northern Wyoming
* Effective this Monday afternoon from 300 PM until Midnight MDT.
* Primary threats include...
Scattered damaging winds and isolated significant gusts to 90
mph likely
Scattered large hail and isolated very large hail events to 3
inches in diameter possible
A tornado or two possible
SUMMARY...Multiple scenarios are expected this evening. A couple
supercells should initially develop over the Black Hills and along a
front over southwest South Dakota. Very large hail will be the main
threat with these storms. A fast-moving cluster over northern
Wyoming should develop into an MCS with embedded supercells and
bowing structures spreading across western South Dakota later this
evening.
The severe thunderstorm watch area is approximately along and 70
statute miles north and south of a line from 50 miles west southwest
of Sheridan WY to 15 miles east northeast of Philip SD. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU1).
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 438...WW 439...WW 440...
AVIATION...A few severe thunderstorms with hail surface and aloft to
3 inches. Extreme turbulence and surface wind gusts to 80 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
27045.
...Grams
