NOAA
SPC Severe Thunderstorm Watch 640
WW 640 SEVERE TSTM ID MT 192050Z – 200400Z 
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
SPC Severe Thunderstorm Watch 639
WW 639 SEVERE TSTM CO NE WY 191945Z – 200300Z 
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
SPC – No watches are valid as of Mon Aug 19 08:02:02 UTC 2024
No watches are valid as of Mon Aug 19 08:02:02 UTC 2024.
SPC Severe Thunderstorm Watch 638
WW 638 SEVERE TSTM AL FL GA CW 182310Z – 190600Z 
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 638 NWS Storm Prediction Center Norman OK 710 PM EDT Sun Aug 18 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Southern Alabama Florida Panhandle Southern Georgia Coastal Waters * Effective this Sunday night and Monday morning from 710 PM until 200 AM EDT. * Primary threats include... Scattered damaging wind gusts to 65 mph possible SUMMARY...Clusters of storms capable of wind damage and possibly some hail will continue south-southeastward across the region this evening within a hot/moist environment. The severe thunderstorm watch area is approximately along and 55 statute miles north and south of a line from 50 miles northwest of Pensacola FL to 30 miles east southeast of Vidalia GA. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU8). 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 634...WW 635...WW 636...WW 637... AVIATION...A few severe thunderstorms with hail surface and aloft to 1 inch. Extreme turbulence and surface wind gusts to 55 knots. A few cumulonimbi with maximum tops to 550. Mean storm motion vector 31025. ...Guyer
SPC Severe Thunderstorm Watch 637
WW 637 SEVERE TSTM AR LA MS 182030Z – 190300Z 
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 637 NWS Storm Prediction Center Norman OK 330 PM CDT Sun Aug 18 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Central Arkansas Northeast Louisiana Western Mississippi * Effective this Sunday afternoon and evening from 330 PM until 1000 PM CDT. * Primary threats include... Scattered damaging winds likely with isolated significant gusts to 75 mph possible Scattered large hail events to 1.5 inches in diameter possible SUMMARY...Thunderstorms are expected to intensify through the late afternoon across central Arkansas and track southeastward across the watch area. a few intense storms capable of damaging wind gusts and large hail are expected. The severe thunderstorm watch area is approximately along and 60 statute miles north and south of a line from 15 miles north northwest of Fort Smith AR to 60 miles southeast of Greenville MS. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU7). 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 634...WW 635...WW 636... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 30030. ...Hart
