SPC Severe Thunderstorm Watch 421 Status Reports
WW 0421 Status Updates STATUS REPORT ON WW 421 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 WNW VTN TO 40 NE RAP TO 45 SSW 2WX TO 50 ESE 4BQ. ..KERR..06/16/25 ATTN...WFO...UNR...ABR... STATUS REPORT FOR WS 421 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS SDC021-031-041-055-063-065-071-075-085-095-105-107-117-119-121- 123-129-137-160640- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE CAMPBELL CORSON DEWEY HAAKON HARDING HUGHES JACKSON JONES LYMAN MELLETTE PERKINS POTTER STANLEY SULLY TODD TRIPP WALWORTH ZIEBACH THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
SPC Severe Thunderstorm Watch 421
WW 421 SEVERE TSTM SD WY 160050Z - 160700Z URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 421 NWS Storm Prediction Center Norman OK 650 PM MDT Sun Jun 15 2025 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Western and Central South Dakota Far Northeast Wyoming * Effective this Sunday night and Monday morning from 650 PM until 100 AM MDT. * Primary threats include... Widespread damaging winds and isolated significant gusts to 85 mph likely Isolated very large hail events to 2 inches in diameter possible SUMMARY...An organized wind-producing squall