369
FLUS43 KFSD 210817
HWOFSD
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SIOUX FALLS SD
317 AM CDT WED OCT 21 2026
IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097-
098-NEZ013-014-SDZ038>040-050-052>071-220830-
LYON-OSCEOLA-DICKINSON-SIOUX-O'BRIEN-CLAY-PLYMOUTH-CHEROKEE-
BUENA VISTA-WOODBURY-IDA-LINCOLN-MURRAY-COTTONWOOD-NOBLES-JACKSON-
PIPESTONE-ROCK-DIXON-DAKOTA-BEADLE-KINGSBURY-BROOKINGS-GREGORY-
JERAULD-SANBORN-MINER-LAKE-MOODY-BRULE-AURORA-DAVISON-HANSON-MCCOOK-
MINNEHAHA-CHARLES MIX-DOUGLAS-HUTCHINSON-TURNER-BON HOMME-YANKTON-
UNION-
317 AM CDT WED OCT 21 2026
THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST IOWA, WEST CENTRAL
IOWA, SOUTHWEST MINNESOTA, NORTHEAST NEBRASKA, CENTRAL SOUTH
DAKOTA, EAST CENTRAL SOUTH DAKOTA, SOUTH CENTRAL SOUTH DAKOTA AND
SOUTHEAST SOUTH DAKOTA.
DAY ONE
TODAY AND TONIGHT.
PATCHY VALLEY FOG IS POSSIBLE LATER THIS MORNING, WHICH COULD LEAD TO
VISIBILITY BELOW TWO MILES AT TIMES, ESPECIALLY ACROSS THE JAMES
RIVER VALLEY.
DAYS TWO THROUGH SEVEN
THURSDAY THROUGH TUESDAY.
MORE WIDESPREAD VALLEY FOG WITH VISIBILITY BELOW TWO MILES MAY
DEVELOP AGAIN THURSDAY MORNING.
ELEVATED FIRE DANGER IS EXPECTED THURSDAY AS WARM, DRY, AND BREEZY
CONDITIONS PREVAIL. MORE WIDESPREAD AND POTENTIALLY CRITICAL FIRE
DANGER IS POSSIBLE FRIDAY, DUE TO STRONGER WINDS. USE CAUTION TO
PREVENT SPARKS, ESPECIALLY WITH HARVEST ACTIVITIES. FIRES MAY SPREAD
QUICKLY FRIDAY.
RAIN CHANCES RETURN THIS WEEKEND, WITH VERY ISOLATED NON-SEVERE
THUNDERSTORMS POSSIBLE.
SPOTTER INFORMATION STATEMENT
SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
NWS SIOUX FALLS WILL DISCONTINUE THE HAZARDOUS WEATHER OUTLOOK
PRODUCT (HWO) ON NOVEMBER 8, 2026. WEATHER HAZARDS AND OUTLOOKS
WILL CONTINUE TO BE PROVIDED THROUGH OTHER STANDARD NWS PRODUCTS,
INCLUDING WEATHER BRIEFING PACKETS, FORECAST DISCUSSIONS, WEATHER
STORY GRAPHICS, THE GRAPHICAL HAZARDOUS WEATHER OUTLOOK, AND UPDATED
HAZARD MESSAGING. ALL LOCAL PRODUCTS AND VISUAL TOOLS ARE ACCESSIBLE
DIRECTLY AT: WEATHER.GOV/SIOUXFALLS.
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