SPC Severe Thunderstorm Watch 239

WW 239 SEVERE TSTM CO NE 212055Z - 220400Z URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 239 NWS Storm Prediction Center Norman OK 255 PM MDT Thu May 21 2026 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northeast Colorado Nebraska Panhandle * Effective this Thursday afternoon and evening from 255 PM until 1000 PM MDT. * Primary threats include... Scattered large hail and isolated very large hail events to 2 inches in diameter possible Isolated damaging wind gusts to 70 mph possible A tornado or two possible SUMMARY...Thunderstorms will develop this afternoon and spread eastward across the watch area. A few supercells are possible, posing a risk of large hail. A tornado or two is possible by early evening as storms track into the eastern half of the watch. The severe thunderstorm watch area is approximately along and 50 statute miles east and west of a line from 55 miles north northwest of Sidney NE to 50 miles 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 238... 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 28030. ...Hart Read more