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SEL3 URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 633 NWS Storm Prediction Center Norman OK 435 AM CDT Sun Aug 18 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Central and Northeast Nebraska Southern South Dakota * Effective this Sunday morning from 435 AM until 1000 AM CDT. * Primary threats include... Isolated significant damaging wind gusts to 75 mph possible Isolated very large hail events to 2.5 inches in diameter possible SUMMARY...Scattered elevated supercells are forecast to continue southeast into the Watch area this morning. Large to very large hail (1 to 2.5 inches in diameter) and severe gusts (60-75 mph) are possible with the stronger storms as this activity moves southeast along an instability gradient in advance of a mid-level disturbance. The severe thunderstorm watch area is approximately along and 55 statute miles east and west of a line from 80 miles north northeast of Ainsworth NE to 35 miles south southeast of Burwell NE. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU3). 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 2.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 550. Mean storm motion vector 32030. ...Smith