315
WWUS73 KFSD 212110
NPWFSD
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SIOUX FALLS SD
410 PM CDT MON JUL 21 2025
IAZ001-002-012-013-021-032-MNZ098-SDZ054-055-061-062-067-220100-
/O.EXA.KFSD.HT.Y.0002.000000T0000Z-250722T0100Z/
LYON-OSCEOLA-SIOUX-O'BRIEN-CHEROKEE-IDA-ROCK-MINER-LAKE-MCCOOK-
MINNEHAHA-LINCOLN-
INCLUDING THE CITIES OF LENNOX, INWOOD, HOLSTEIN, CHEROKEE, IDA
GROVE, BATTLE CREEK, LARCHWOOD, BRIDGEWATER, LUVERNE, ORLAND,
MADISON, ROCK RAPIDS, HAWARDEN, SHELDON, SALEM, HARTLEY,
HARRISBURG, MONTROSE, GEORGE, CANISTOTA, CANTON, SANBORN, ORANGE
CITY, HOWARD, TEA, SIBLEY, SIOUX FALLS, SIOUX CENTER, HULL, AND
ROCK VALLEY
410 PM CDT MON JUL 21 2025
..HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING
* WHAT...HEAT INDEX VALUES UP TO 100.
* WHERE...PORTIONS OF NORTHWEST AND WEST CENTRAL IOWA, SOUTHWEST
MINNESOTA, AND EAST CENTRAL AND SOUTHEAST SOUTH DAKOTA.
* WHEN...UNTIL 8 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.
IAZ020-031-NEZ013-014-SDZ050-052-053-057>060-063>066-068>071-220100-
/O.CON.KFSD.HT.Y.0002.000000T0000Z-250722T0100Z/
PLYMOUTH-WOODBURY-DIXON-DAKOTA-GREGORY-JERAULD-SANBORN-BRULE-
AURORA-DAVISON-HANSON-CHARLES MIX-DOUGLAS-HUTCHINSON-TURNER-BON
HOMME-YANKTON-CLAY-UNION-
INCLUDING THE CITIES OF STICKNEY, IRENE, YANKTON, WAGNER, MENNO,
CENTERVILLE, ALLEN, PONCA, CORSICA, FREEMAN, TABOR, MITCHELL, ELK
POINT, SIOUX CITY, ARMOUR, JEFFERSON, CHAMBERLAIN, WAKEFIELD,
ALCESTER, TYNDALL, WOONSOCKET, GREGORY, CLAYTON, PLANKINTON,
HURLEY, DELMONT, AVON, SOUTH SIOUX CITY, CHANCELLOR, PLATTE,
SPRINGFIELD, MARION, BURKE, VERMILLION, KIMBALL, PARKSTON,
ALEXANDRIA, LE MARS, LAKE ANDES, PARKER, WHITE LAKE, SCOTLAND,
ALPENA, NORTH SIOUX CITY, MARTY, EMERY, VIBORG, TRIPP, WESSINGTON
SPRINGS, AND BERESFORD
410 PM CDT MON JUL 21 2025
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING
* WHAT...HEAT INDEX VALUES UP TO 105.
* WHERE...PORTIONS OF NORTHWEST AND WEST CENTRAL IOWA, NORTHEAST
NEBRASKA, AND CENTRAL, EAST CENTRAL, SOUTH CENTRAL, AND SOUTHEAST
SOUTH DAKOTA.
* WHEN...UNTIL 8 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.
IG
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