SPC Severe Thunderstorm Watch 449

By Newsroom America Feeds at 12 Aug 2017

WW 449 SEVERE TSTM CO KS NE SD 122100Z - 130500Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 449 NWS Storm Prediction Center Norman OK 300 PM MDT Sat Aug 12 2017 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Eastern Colorado Northwest Kansas Western Nebraska Southern South Dakota * Effective this Saturday afternoon and evening from 300 PM until 1100 PM MDT. * Primary threats include... Scattered large hail likely with isolated very large hail events to 3 inches in diameter possible Isolated damaging wind gusts to 70 mph possible A tornado or two possible SUMMARY...Multiple corridors of severe thunderstorms are expected to continue to increase across the region through the remainder of the afternoon into evening. The environment will support supercells capable of large hail. Clusters of southeastward-moving storms will also evolve with damaging winds and additional concern. The severe thunderstorm watch area is approximately along and 90 statute miles east and west of a line from 65 miles north of Valentine NE to 25 miles west southwest of Burlington CO. 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 447...WW 448... AVIATION...A few severe thunderstorms with hail surface and aloft to 3 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 31025. ...Guyer Read more



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