774  
FLUS43 KFSD 211058  
HWOFSD  
 
HAZARDOUS WEATHER OUTLOOK  
NATIONAL WEATHER SERVICE SIOUX FALLS SD  
558 AM CDT THU SEP 21 2017  
 
MNZ071-072-097-SDZ038>040-050-052>066-068-069-221100-  
LINCOLN MN-LYON MN-PIPESTONE-BEADLE-KINGSBURY-BROOKINGS-GREGORY-  
JERAULD-SANBORN-MINER-LAKE-MOODY-BRULE-AURORA-DAVISON-HANSON-  
MCCOOK-MINNEHAHA-CHARLES MIX-DOUGLAS-HUTCHINSON-TURNER-BON HOMME-  
YANKTON-  
558 AM CDT THU SEP 21 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  
 
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.  
   
DAYS TWO THROUGH SEVEN
 
FRIDAY THROUGH WEDNESDAY  
 
RAINFALL CHANCES INCREASE BY LATER FRIDAY AND CONTINUE AT TIMES  
INTO EARLY NEXT WEEK, WITH THE THREAT FOR PERIODS OF HEAVY  
RAINFALL. POTENTIALLY TOTALING SEVERAL INCHES OF RAIN FOR SOME  
AREAS OVER THE THREE DAY PERIOD FROM FRIDAY NIGHT THROUGH MONDAY  
NIGHT, THERE IS A THREAT FOR SIGNIFICANT PONDING OF WATER AND SOME  
FLASH FLOODING.  
 
OTHERWISE, AS THUNDERSTORMS DEVELOP VERY LATE FRIDAY AFTERNOON  
AND EVENING FROM SOUTH CENTRAL TO EAST CENTRAL SD, AND A FEW  
STORMS COULD BE STRONG TO SEVERE WITH LARGE HAIL, DAMAGING WIND,  
AND EVEN A TORNADO. AFTER THIS, LOCATION OF THE SEVERE WEATHER  
THREAT BOTH SATURDAY AND SUNDAY REMAINS DIFFICULT TO DETERMINE,  
DEPENDENT ON WHERE THE THE BOUNDARY SETS UP.  
   
SPOTTER INFORMATION STATEMENT
 
 
SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.  
 

 
 
IAZ001>003-012>014-020>022-031-032-MNZ080-081-089-090-098-NEZ013-  
014-SDZ067-070-071-221100-  
LYON IA-OSCEOLA-DICKINSON-SIOUX-O'BRIEN-CLAY IA-PLYMOUTH-CHEROKEE-  
BUENA VISTA-WOODBURY-IDA-MURRAY-COTTONWOOD-NOBLES-JACKSON-ROCK-  
DIXON-DAKOTA-LINCOLN SD-CLAY SD-UNION-  
558 AM CDT THU SEP 21 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  
 
NO HAZARDOUS WEATHER IS EXPECTED TODAY AND TONIGHT.  
   
DAYS TWO THROUGH SEVEN
 
FRIDAY THROUGH WEDNESDAY  
 
THUNDERSTORM RISKS WILL RETURN BY LATE FRIDAY AND CONTINUE AT  
TIMES INTO EARLY NEXT WEEK. AT THIS TIME, WHILE A WIDESPREAD  
SEVERE WEATHER RISK IS UNLIKELY, AN ISOLATED STRONG TO SEVERE  
STORMS APPEARS POSSIBLE SATURDAY OR SUNDAY, DEPENDING ON WHERE  
THE BOUNDARY SETS UP. IN ADDITION, SOME AREAS OF HEAVY RAINFALL  
ARE LIKELY, ALONG WITH A RISK FOR SIGNIFICANT PONDING OR FLASH  
FLOODING, ESPECIALLY NEAR AND WEST OF A WINDOM TO SIOUX CITY LINE.  
   
SPOTTER INFORMATION STATEMENT
 
 
SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.  
 

 
 
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