Day: August 19, 2024

SPC Severe Thunderstorm Watch 640

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WW 640 SEVERE TSTM ID MT 192050Z – 200400Z
WW 0640 Image

 URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 640
NWS Storm Prediction Center Norman OK
250 PM MDT Mon Aug 19 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northeast Idaho Western and Central Montana * Effective this Monday afternoon and evening from 250 PM until 1000 PM MDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Isolated large hail events to 1.5 inches in diameter possible SUMMARY...Thunderstorms are forming over the mountains of northern
Idaho and western Montana. These storms will intensify and organize
through the afternoon and spread northeastward across the watch
area. Damaging wind gusts will be possible in the strongest storms. The severe thunderstorm watch area is approximately along and 70
statute miles east and west of a line from 35 miles east southeast
of Salmon ID to 35 miles northeast of Cut Bank MT. 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 639... AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
23025. ...Hart

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SPC Severe Thunderstorm Watch 639

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WW 639 SEVERE TSTM CO NE WY 191945Z – 200300Z
WW 0639 Image

 URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 639
NWS Storm Prediction Center Norman OK
145 PM MDT Mon Aug 19 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Eastern Colorado Nebraska Panhandle Southeast Wyoming * Effective this Monday afternoon and evening from 145 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 are expected to build eastward off the
foothills of this afternoon, spreading across the watch area. The
strongest storms will pose a risk of large hail and locally damaging
wind gusts. The severe thunderstorm watch area is approximately along and 35
statute miles east and west of a line from 25 miles southeast of
Pueblo CO to 20 miles northwest of Chadron NE. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU9). 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
24025. ...Hart

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