SPC Severe Thunderstorm Watch 643

WW 643 SEVERE TSTM MT 220025Z – 220700Z
WW 0643 Image

 URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 643
NWS Storm Prediction Center Norman OK
625 PM MDT Wed Aug 21 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northeast Montana * Effective this Wednesday night and Thursday morning from 625 PM until 100 AM MDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 75 mph possible Scattered large hail and isolated very large hail events to 2.5 inches in diameter possible SUMMARY...Thunderstorms should continue to intensify this evening
across parts of northeast Montana, while posing a threat for large
to very large hail around 1.5-2.5 inches in diameter, along with
severe/damaging winds up to 65-75 mph. The severe thunderstorm watch area is approximately along and 120
statute miles east and west of a line from 50 miles north of Glasgow
MT to 95 miles south of Glasgow MT. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU3). 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 642... AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
26025. ...Gleason 

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SPC Severe Thunderstorm Watch 642

WW 642 SEVERE TSTM MT SD 212100Z – 220400Z
WW 0642 Image

 URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 642
NWS Storm Prediction Center Norman OK
400 PM CDT Wed Aug 21 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Southeast Montana Western South Dakota * Effective this Wednesday afternoon and evening from 400 PM until 1100 PM CDT. * Primary threats include... Scattered damaging wind gusts to 70 mph likely Scattered large hail and isolated very large hail events to 2 inches in diameter possible SUMMARY...Thunderstorms will develop across southeast Montana and
western South Dakota through the afternoon and evening. The
strongest cells may produce damaging winds and large hail. The severe thunderstorm watch area is approximately along and 55
statute miles north and south of a line from 145 miles west
northwest of Broadus MT to 25 miles north northeast of Philip SD.
For a complete depiction of the watch see the associated watch
outline update (WOUS64 KWNS WOU2). 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
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
25030. ...Hart 

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