053  
FLUS43 KFSD 251027  
HWOFSD  
 
HAZARDOUS WEATHER OUTLOOK  
NATIONAL WEATHER SERVICE SIOUX FALLS SD  
527 AM CDT TUE JUL 25 2017  
 
MNZ071-072-080-081-097-098-SDZ038>040-050-052>066-068-261030-  
LINCOLN MN-LYON MN-MURRAY-COTTONWOOD-PIPESTONE-ROCK-BEADLE-  
KINGSBURY-BROOKINGS-GREGORY-JERAULD-SANBORN-MINER-LAKE-MOODY-  
BRULE-AURORA-DAVISON-HANSON-MCCOOK-MINNEHAHA-CHARLES MIX-DOUGLAS-  
HUTCHINSON-TURNER-BON HOMME-  
527 AM CDT TUE JUL 25 2017  
 
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST  
MINNESOTA, CENTRAL SOUTH DAKOTA, EAST CENTRAL SOUTH DAKOTA, SOUTH  
CENTRAL SOUTH DAKOTA, AND SOUTHEAST SOUTH DAKOTA.  
   
DAY ONE
 
TODAY AND TONIGHT  
 
WARM AND HUMID CONDITIONS WILL SET THE STAGE FOR THUNDERSTORMS  
TO ERUPT LATE THIS AFTERNOON INTO EARLY EVENING ALONG A LINE FROM  
CHAMBERLAIN TO HURON TO MARSHALL. INITIAL MORE ISOLATED STORMS  
WILL BE CAPABLE OF HAIL UP TO 2 INCHES IN DIAMETER AND WIND GUSTS  
TO 75 MPH. AN ISOLATED TORNADO WILL BE POSSIBLE, MAINLY ALONG THE  
HIGHWAY 14 CORRIDOR FROM HURON TO MARSHALL BETWEEN 6 PM AND 10 PM.  
STORMS WILL BECOME MORE WIDESPREAD THROUGH THE EVENING, WITH THE  
THREAT EVOLVING TOWARD DAMAGING WIND GUSTS, WITH THE STORM THREAT  
AREA GRADUALLY SHIFTING SOUTHEAST TOWARD INTERSTATE 90 TOWARD AND  
AFTER MIDNIGHT. STORMS WILL ALSO BRING A THREAT OF LOCALLY HEAVY  
RAINFALL, WITH POTENTIAL FOR UP TO 2 TO 4 INCHES OF RAIN AND FLASH  
FLOODING IN SOME LOCATIONS.  
 
HEAT INDEX VALUES FROM THE JAMES RIVER VALLEY WESTWARD WILL REACH  
A VERY UNCOMFORTABLE AND DANGEROUS 100 TO 105 DEGREES FOR A FEW  
HOURS THIS AFTERNOON.  
   
DAYS TWO THROUGH SEVEN
 
WEDNESDAY THROUGH MONDAY  
 
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.  
   
SPOTTER INFORMATION STATEMENT
 
 
SPOTTER ACTIVATION IS LIKELY AFTER 5 PM, BUT CLOSER TO 10 PM IN  
THE TRI-STATE AREA.  
 

 
 
IAZ001>003-012-013-020-031-MNZ089-090-NEZ013-014-SDZ067-069>071-  
261030-  
LYON IA-OSCEOLA-DICKINSON-SIOUX-O'BRIEN-PLYMOUTH-WOODBURY-NOBLES-  
JACKSON-DIXON-DAKOTA-LINCOLN SD-YANKTON-CLAY SD-UNION-  
527 AM CDT TUE JUL 25 2017  
 
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST IOWA,  
WEST CENTRAL IOWA, SOUTHWEST MINNESOTA, NORTHEAST NEBRASKA, AND  
SOUTHEAST SOUTH DAKOTA.  
   
DAY ONE
 
TODAY AND TONIGHT  
 
WHILE THERE IS A SMALL CHANCE OF THUNDERSTORMS BY LATE EVENING,  
THE BETTER CHANCE FOR THUNDERSTORMS IS EXPECTED AFTER MIDNIGHT.  
THE MAIN THREAT WITH STORMS WILL BE DAMAGING WIND GUSTS TO 70 MPH,  
BUT A FEW STORMS WILL BE CAPABLE OF PRODUCING QUARTER SIZE HAIL  
AND PERIODS OF HEAVY RAINFALL.  
 
HEAT INDEX VALUES THROUGH THE MISSOURI RIVER VALLEY WILL REACH  
A VERY UNCOMFORTABLE AND DANGEROUS NEAR 100 DEGREES FOR A FEW  
HOURS THIS AFTERNOON.  
   
DAYS TWO THROUGH SEVEN
 
WEDNESDAY THROUGH MONDAY  
 
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.  
   
SPOTTER INFORMATION STATEMENT
 
 
SPOTTER ACTIVATION WILL BE POSSIBLE AFTER 10 PM.  
 

 
 
IAZ014-021-022-032-261030-  
CLAY IA-CHEROKEE-BUENA VISTA-IDA-  
527 AM CDT TUE JUL 25 2017  
 
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST IOWA  
AND WEST CENTRAL IOWA.  
   
DAY ONE
 
TODAY AND TONIGHT  
 
THUNDERSTORMS WILL BE POSSIBLE BY LATE NIGHT. WHILE SEVERE WEATHER  
IS UNLIKELY, A FEW STORMS COULD PRODUCE HAIL UP TO QUARTER SIZE  
AND WINDS TO 60 MPH.  
   
DAYS TWO THROUGH SEVEN
 
WEDNESDAY THROUGH MONDAY  
 
THUNDERSTORMS WILL BE LIKELY ON WEDNESDAY. AN ISOLATED SEVERE  
STORM IS POSSIBLE, WITH THE MAIN THREATS QUARTER SIZED HAIL AND  
60 MPH WIND GUSTS.  
   
SPOTTER INFORMATION STATEMENT
 
 
SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT.  
 

 
 
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