Severe Thunderstorm Watch: Aurora, SD; Bon Homme, SD; Brookings, SD; Charles Mix, SD; Clay, SD; Davison, SD; Douglas, SD; Gregory, SD; Hanson, SD; Hutchinson, SD; Kingsbury, SD; Lake, SD; Lincoln, SD; McCook, SD; Miner, SD; Minnehaha, SD; Moody, SD; Sanborn, SD; Turner, SD; Yankton, SD

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Severe Thunderstorm Watch — Aurora, SD; Bon Homme, SD; Brookings, SD; Charles Mix, SD; Clay, SD; Davison, SD; Douglas, SD; Gregory, SD; Hanson, SD; Hutchinson, SD; Kingsbury, SD; Lake, SD; Lincoln, SD; McCook, SD; Miner, SD; Minnehaha, SD; Moody, SD; Sanborn, SD; Turner, SD; Yankton, SD Severity: Severe. Certainty: Possible. THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 664 IN EFFECT UNTIL 2 AM CDT TUESDAY FOR THE FOLLOWING AREAS IN SOUTH DAKOTA THIS WATCH INCLUDES 20 COUNTIES IN EAST CENTRAL SOUTH DAKOTA BROOKINGS KINGSBURY LAKE MINER MOODY SANBORN IN SOUTH CENTRAL SOUTH DAKOTA AURORA CHARLES MIX DOUGLAS GREGORY IN SOUTHEAST SOUTH DAKOTA BON HOMME CLAY DAVISON HANSON HUTCHINSON LINCOLN MCCOOK MINNEHAHA TURNER YANKTON THIS INCLUDES THE CITIES OF ALEXANDRIA, ARLINGTON, ARMOUR, AVON, BRIDGEWATER, BROOKINGS, BURKE, CANISTOTA, CANTON, CENTERVILLE, CHANCELLOR, CLAYTON, CORSICA, DE SMET, DELMONT, EMERY, FLANDREAU, FREEMAN, GREGORY, HARRISBURG, HOWARD, HURLEY, IRENE, LAKE ANDES, LAKE PRESTON, LENNOX, MADISON, MARION, MARTY, MENNO, MITCHELL, MONTROSE, ORLAND, PARKER, PARKSTON, PLANKINTON, PLATTE, SALEM, SCOTLAND, SIOUX FALLS, SPRINGFIELD, STICKNEY, TABOR, TEA, TRIPP, TYNDALL, VERMILLION, VIBORG, WAGNER, WHITE LAKE, WOONSOCKET, AND YANKTON.