NOAA
SPC Severe Thunderstorm Watch 631
WW 631 SEVERE TSTM CA OR WA 172020Z – 180400Z 
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 631 NWS Storm Prediction Center Norman OK 120 PM PDT Sat Aug 17 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northern California Western Oregon Southwest Washington * Effective this Saturday afternoon and evening from 120 PM until 900 PM PDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Scattered large hail events to 1.5 inches in diameter possible SUMMARY...Thunderstorms will intensify this afternoon along and west of the Cascade Range, tracking northward across the watch area. A few severe storms are expected, capable 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 65 miles south southwest of Mount Shasta CA to 60 miles north northeast of Portland OR. 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 630... 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 20030. ...Hart
SPC Severe Thunderstorm Watch 630
WW 630 SEVERE TSTM UT WY 171850Z – 180100Z 
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 630 NWS Storm Prediction Center Norman OK 1250 PM MDT Sat Aug 17 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Western and Central Utah Southwest Wyoming * Effective this Saturday afternoon and evening from 1250 PM until 700 PM MDT. * Primary threats include... Scattered damaging wind gusts to 70 mph likely Isolated large hail events to 1.5 inches in diameter possible SUMMARY...Clusters of thunderstorms will spread across much of Utah this afternoon and early evening, posing a risk of locally damaging wind gusts and hail. The severe thunderstorm watch area is approximately along and 70 statute miles east and west of a line from 40 miles east of Saint George UT to 25 miles northeast of Salt Lake City UT. 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. && 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 23030. ...Hart
SPC – No watches are valid as of Sat Aug 17 09:02:01 UTC 2024
No watches are valid as of Sat Aug 17 09:02:01 UTC 2024.
SPC Severe Thunderstorm Watch 629
WW 629 SEVERE TSTM AR 170200Z – 170700Z 
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 629 NWS Storm Prediction Center Norman OK 900 PM CDT Fri Aug 16 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of West-central to north-central Arkansas * Effective this Friday night and Saturday morning from 900 PM until 200 AM CDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 75 mph possible Isolated very large hail events to 2 inches in diameter possible SUMMARY...A complex of severe thunderstorms -- with a history of severe as recently as a 56-kt gust at NW AR Regional (XNA) at 141Z -- is expected to pose a continuing severe-wind and hail threat southeastward into more of AR this evening. Some expansion or shift in motion toward southward also is possible. The severe thunderstorm watch area is approximately along and 40 statute miles north and south of a line from 10 miles south of Fort Smith AR to 55 miles northeast of Russellville AR. 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. && OTHER WATCH INFORMATION...CONTINUE...WW 628... AVIATION...A few severe thunderstorms with hail surface and aloft to 2 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 600. Mean storm motion vector 32035. ...Edwards
SPC Severe Thunderstorm Watch 628
WW 628 SEVERE TSTM AR MO OK 162035Z – 170400Z 
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 628 NWS Storm Prediction Center Norman OK 335 PM CDT Fri Aug 16 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northwest Arkansas Extreme southwest Missouri Northern Oklahoma * Effective this Friday afternoon and evening from 335 PM until 1100 PM CDT. * Primary threats include... Scattered damaging winds likely with isolated significant gusts to 75 mph possible Scattered large hail likely with isolated very large hail events to 2.5 inches in diameter possible SUMMARY...Multiple areas of thunderstorm development are possible along and south of the Kansas/Oklahoma border through late evening, in a storm environment favoring organized clusters and supercells. The more intense storms will be capable of producing very large hail up to 2.5 inches in diameter, as well as severe outflow winds up to 75 mph. The severe thunderstorm watch area is approximately along and 35 statute miles north and south of a line from 40 miles west southwest of Alva OK to 30 miles south southeast of Monett MO. 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 627... 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 600. Mean storm motion vector 30025. ...Thompson
