875  
WWUS73 KFSD 192126  
NPWFSD  
 
URGENT - WEATHER MESSAGE  
NATIONAL WEATHER SERVICE SIOUX FALLS SD  
426 PM CDT FRI JUL 19 2019  
 
IAZ020>022-031-032-NEZ013-014-SDZ068>071-200300-  
/O.CON.KFSD.EH.W.0002.000000T0000Z-190720T0300Z/  
PLYMOUTH-CHEROKEE-BUENA VISTA-WOODBURY-IDA-DIXON-DAKOTA-BON HOMME-  
YANKTON-CLAY-UNION-  
426 PM CDT FRI JUL 19 2019  
 
...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM CDT THIS  
EVENING...  
 
* HEAT INDEX VALUES...IN EXCESS IF 110 AT TIMES, DUE TO  
TEMPERATURES IN THE MID TO UPPER 90S, AND DEWPOINTS IN THE MID  
TO UPPER 70S.  
 
* TIMING...THROUGH THIS EVENING.  
 
* IMPACTS...DANGEROUSLY HIGH TEMPERATURES AND HUMIDITY COULD  
QUICKLY CAUSE HEAT STRESS OR HEAT STROKE IF PRECAUTIONS ARE  
NOT TAKEN.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
TAKE EXTRA PRECAUTIONS...IF YOU WORK OR SPEND TIME OUTSIDE. WHEN  
POSSIBLE...RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR  
EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT  
STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN  
POSSIBLE AND DRINK PLENTY OF WATER.  
 
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.  
 
AN EXCESSIVE HEAT WARNING MEANS THAT A PROLONGED PERIOD OF  
DANGEROUSLY HOT TEMPERATURES WILL OCCUR. THE COMBINATION OF HOT  
TEMPERATURES AND HIGH HUMIDITY WILL COMBINE TO CREATE A DANGEROUS  
SITUATION IN WHICH HEAT ILLNESSES ARE LIKELY. DRINK PLENTY OF  
FLUIDS...STAY IN AN AIR-CONDITIONED ROOM...STAY OUT OF THE SUN...  
AND CHECK UP ON RELATIVES AND NEIGHBORS.  
 
YOUNG CHILDREN AND PETS SHOULD NEVER BE LEFT UNATTENDED IN  
VEHICLES UNDER ANY CIRCUMSTANCES. THIS IS ESPECIALLY TRUE DURING  
WARM OR HOT WEATHER WHEN CAR INTERIORS CAN REACH LETHAL  
TEMPERATURES IN A MATTER OF MINUTES.  
 

 
 

 
 
IAZ001>003-012>014-MNZ072-080-081-089-090-098-SDZ060>062-065>067-  
200300-  
/O.CON.KFSD.EH.W.0002.000000T0000Z-190720T0300Z/  
LYON-OSCEOLA-DICKINSON-SIOUX-O'BRIEN-CLAY-MURRAY-COTTONWOOD-  
NOBLES-JACKSON-ROCK-HANSON-MCCOOK-MINNEHAHA-HUTCHINSON-TURNER-  
LINCOLN-  
426 PM CDT FRI JUL 19 2019  
 
...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM CDT THIS  
EVENING...  
 
* HEAT INDEX VALUES...IN EXCESS OF 110 AT TIMES, DUE TO  
TEMPERATURES IN THE MID 90S, AND DEWPOINTS IN THE MID TO UPPER  
70S. SOME LOCATIONS TOWARD HIGHWAY 14 IN SOUTHWEST MINNESOTA  
COULD SEE SOMEWHAT LOWER HEAT INDEX VALUES DUE TO OUTFLOW FROM  
THUNDERSTORMS WHICH PASSED TO THE NORTH.  
 
* TIMING...THIS AFTERNOON AND EVENING.  
 
* IMPACTS...DANGEROUSLY HIGH TEMPERATURES AND HUMIDITY COULD  
QUICKLY CAUSE HEAT STRESS OR HEAT STROKE IF PRECAUTIONS ARE  
NOT TAKEN.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
TAKE EXTRA PRECAUTIONS...IF YOU WORK OR SPEND TIME OUTSIDE. WHEN  
POSSIBLE...RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR  
EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT  
STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN  
POSSIBLE AND DRINK PLENTY OF WATER.  
 
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.  
 
AN EXCESSIVE HEAT WARNING MEANS THAT A PROLONGED PERIOD OF  
DANGEROUSLY HOT TEMPERATURES WILL OCCUR. THE COMBINATION OF HOT  
TEMPERATURES AND HIGH HUMIDITY WILL COMBINE TO CREATE A DANGEROUS  
SITUATION IN WHICH HEAT ILLNESSES ARE LIKELY. DRINK PLENTY OF  
FLUIDS...STAY IN AN AIR-CONDITIONED ROOM...STAY OUT OF THE SUN...  
AND CHECK UP ON RELATIVES AND NEIGHBORS.  
 
YOUNG CHILDREN AND PETS SHOULD NEVER BE LEFT UNATTENDED IN  
VEHICLES UNDER ANY CIRCUMSTANCES. THIS IS ESPECIALLY TRUE DURING  
WARM OR HOT WEATHER WHEN CAR INTERIORS CAN REACH LETHAL  
TEMPERATURES IN A MATTER OF MINUTES.  
 

 
 

 
 
SDZ038>040-052-192300-  
/O.CON.KFSD.HT.Y.0008.000000T0000Z-190719T2300Z/  
BEADLE-KINGSBURY-BROOKINGS-JERAULD-  
426 PM CDT FRI JUL 19 2019  
   
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 6 PM CDT THIS EVENING
 
 
* HEAT INDEX VALUES...100 TO 105 DUE TO TEMPERATURES IN THE UPPER  
80S TO LOWER 90S, AND DEWPOINTS IN THE MID 70S.  
 
* TIMING...THIS AFTERNOON.  
 
* IMPACTS...THE HEAT AND HUMIDITY MAY CAUSE HEAT STRESS DURING  
OUTDOOR EXERTION OR EXTENDED EXPOSURE.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES IS  
EXPECTED. THE COMBINATION OF HOT TEMPERATURES AND HIGH HUMIDITY  
WILL COMBINE TO CREATE A SITUATION IN WHICH HEAT ILLNESSES ARE  
POSSIBLE. DRINK PLENTY OF FLUIDS...STAY IN AN AIR-CONDITIONED  
ROOM...STAY OUT OF THE SUN...AND CHECK UP ON RELATIVES AND  
NEIGHBORS.  
 
TAKE EXTRA PRECAUTIONS...IF YOU WORK OR SPEND TIME OUTSIDE. WHEN  
POSSIBLE...RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR  
EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT  
STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN  
POSSIBLE AND DRINK PLENTY OF WATER.  
 
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.  
 

 
 

 
 
MNZ071-097-SDZ050-053>059-063-064-200100-  
/O.CON.KFSD.HT.Y.0008.000000T0000Z-190720T0100Z/  
LINCOLN-PIPESTONE-GREGORY-SANBORN-MINER-LAKE-MOODY-BRULE-AURORA-  
DAVISON-CHARLES MIX-DOUGLAS-  
426 PM CDT FRI JUL 19 2019  
   
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING
 
 
* HEAT INDEX VALUES...UP TO 105 DUE TO TEMPERATURES IN THE MID  
90S, AND DEWPOINTS IN THE MID 70S.  
 
* TIMING...THIS AFTERNOON AND EARLY EVENING.  
 
* IMPACTS...THE HEAT AND HUMIDITY MAY CAUSE HEAT STRESS DURING  
OUTDOOR EXERTION OR EXTENDED EXPOSURE.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES IS  
EXPECTED. THE COMBINATION OF HOT TEMPERATURES AND HIGH HUMIDITY  
WILL COMBINE TO CREATE A SITUATION IN WHICH HEAT ILLNESSES ARE  
POSSIBLE. DRINK PLENTY OF FLUIDS...STAY IN AN AIR-CONDITIONED  
ROOM...STAY OUT OF THE SUN...AND CHECK UP ON RELATIVES AND  
NEIGHBORS.  
 
TAKE EXTRA PRECAUTIONS...IF YOU WORK OR SPEND TIME OUTSIDE. WHEN  
POSSIBLE...RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR  
EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT  
STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN  
POSSIBLE AND DRINK PLENTY OF WATER.  
 
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.  
 

 
 

 
 
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