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SEL6 URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 456 NWS Storm Prediction Center Norman OK 500 PM CDT Sun Aug 22 2021 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of North-central Kansas South-central Nebraska * Effective this Sunday afternoon and evening from 500 PM until 1000 PM CDT. * Primary threats include... Scattered large hail and isolated very large hail events to 2 inches in diameter possible Isolated significant damaging wind gusts to 75 mph possible A tornado or two possible SUMMARY...A couple splitting supercells may develop across central portions of the Kansas-Nebraska border this evening. The severe thunderstorm watch area is approximately along and 60 statute miles north and south of a line from 40 miles west northwest of Hill City KS to 10 miles east southeast of Hastings NE. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU6). 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 455... 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 550. Mean storm motion vector 24025. ...Grams