169  
WWUS73 KFSD 091732  
NPWFSD  
 
URGENT - WEATHER MESSAGE  
NATIONAL WEATHER SERVICE SIOUX FALLS SD  
1232 PM CDT TUE JUN 9 2026  
 
IAZ001-002-012>014-020>022-031-032-NEZ013-014-SDZ059>071-100200-  
/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 ALLEN, DELMONT, CHEROKEE, TABOR, LAKE  
ANDES, LARCHWOOD, AVON, MITCHELL, BERESFORD, MENNO, BATTLE CREEK,  
SHELDON, SCOTLAND, SANBORN, PONCA, EMERY, YANKTON, NORTH SIOUX  
CITY, WAGNER, SIOUX CENTER, WAKEFIELD, GEORGE, LE MARS, SIOUX  
FALLS, CENTERVILLE, MARION, CANISTOTA, ORANGE CITY, ALCESTER,  
ROCK VALLEY, IRENE, HOLSTEIN, JEFFERSON, TEA, HARTLEY, TYNDALL,  
PARKER, CLAYTON, SPRINGFIELD, ROCK RAPIDS, SOUTH SIOUX CITY,  
VIBORG, ALEXANDRIA, FREEMAN, VERMILLION, LENNOX, CORSICA, CANTON,  
SALEM, HURLEY, CHANCELLOR, STORM LAKE, ELK POINT, HAWARDEN,  
PLATTE, ARMOUR, INWOOD, SIOUX CITY, HULL, SIBLEY, IDA GROVE,  
MONTROSE, SPENCER, PARKSTON, HARRISBURG, MARTY, BRIDGEWATER, AND  
TRIPP  
1232 PM CDT TUE JUN 9 2026  
   
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 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...UNTIL 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.  
 
 
 
 
 
SAMET  
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