564
WWUS73 KFSD 090903
NPWFSD
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SIOUX FALLS SD
403 AM CDT TUE JUN 9 2026
IAZ001-002-012>014-020>022-031-032-NEZ013-014-SDZ059>071-092000-
/O.CON.KFSD.HT.Y.0001.260609T1800Z-260610T0200Z/
LYON-OSCEOLA-SIOUX-O'BRIEN-CLAY-PLYMOUTH-CHEROKEE-BUENA VISTA-
WOODBURY-IDA-DIXON-DAKOTA-DAVISON-HANSON-MCCOOK-MINNEHAHA-CHARLES
MIX-DOUGLAS-HUTCHINSON-TURNER-LINCOLN-BON HOMME-YANKTON-CLAY-
UNION-
INCLUDING THE CITIES OF SIOUX CENTER, HOLSTEIN, ALLEN, HAWARDEN,
SPENCER, LAKE ANDES, CENTERVILLE, DELMONT, CANTON, YANKTON, ELK
POINT, CORSICA, PARKSTON, ORANGE CITY, MITCHELL, BRIDGEWATER,
PONCA, ALCESTER, IDA GROVE, SALEM, WAGNER, TEA, SHELDON, VIBORG,
BERESFORD, ROCK VALLEY, SOUTH SIOUX CITY, HURLEY, ARMOUR, PLATTE,
MARTY, SIOUX FALLS, SANBORN, CHEROKEE, FREEMAN, MARION, MENNO,
CHANCELLOR, SIBLEY, STORM LAKE, LENNOX, ALEXANDRIA, PARKER,
BATTLE CREEK, SIOUX CITY, GEORGE, CLAYTON, TRIPP, NORTH SIOUX
CITY, IRENE, MONTROSE, CANISTOTA, INWOOD, WAKEFIELD, SCOTLAND,
JEFFERSON, ROCK RAPIDS, EMERY, HARRISBURG, LARCHWOOD, AVON,
SPRINGFIELD, TABOR, VERMILLION, HULL, HARTLEY, TYNDALL, AND LE
MARS
403 AM CDT TUE JUN 9 2026
...HEAT ADVISORY REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO 9 PM
CDT THIS EVENING...
* WHAT...HEAT INDEX VALUES UP TO 105 EXPECTED, HOTTEST SOUTH OF
HIGHWAY 18.
* WHERE...PORTIONS OF NORTHWEST AND WEST CENTRAL IOWA, NORTHEAST
NEBRASKA, AND SOUTH CENTRAL AND SOUTHEAST SOUTH DAKOTA.
* WHEN...FROM 1 PM THIS AFTERNOON TO 9 PM CDT THIS EVENING.
* IMPACTS...HOT TEMPERATURES AND HIGH HUMIDITY MAY CAUSE HEAT
ILLNESSES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DRINK PLENTY OF FLUIDS, STAY IN AN AIR-CONDITIONED ROOM, STAY OUT OF
THE SUN, AND CHECK UP ON RELATIVES AND NEIGHBORS.
DO NOT LEAVE YOUNG CHILDREN AND PETS IN UNATTENDED VEHICLES. CAR
INTERIORS WILL REACH LETHAL TEMPERATURES IN A MATTER OF MINUTES.
TO REDUCE RISK DURING OUTDOOR WORK, THE OCCUPATIONAL SAFETY AND
HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN
SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT
SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN
EMERGENCY! CALL 9 1 1.
JH
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