362  
WGUS43 KFSD 211147  
FLWFSD  
BULLETIN - IMMEDIATE BROADCAST REQUESTED  
FLOOD WARNING  
NATIONAL WEATHER SERVICE SIOUX FALLS SD  
647 AM CDT FRI SEP 21 2018  
 
...THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A FLOOD  
WARNING FOR THE FOLLOWING RIVERS IN MINNESOTA...SOUTH DAKOTA...  
FLANDREAU CREEK NEAR FLANDREAU  
 
...FORECAST FLOODING CHANGED FROM MODERATE TO MAJOR SEVERITY FOR THE  
FOLLOWING RIVERS IN IOWA...  
FLOYD RIVER AT LE MARS  
 
...FORECAST FLOODING CHANGED FROM MINOR TO MODERATE SEVERITY FOR THE  
FOLLOWING RIVERS IN IOWA...  
FLOYD RIVER AT MERRILL  
 
.THE FOLLOWING RIVER FORECASTS INCLUDE FORECAST PRECIPITATION THROUGH  
TONIGHT. ANY ADDITIONAL FUTURE RAINS COULD AFFECT THE CREST  
FORECASTS.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
SAFETY MESSAGE...DO NOT DRIVE CARS THROUGH FLOODED AREAS. THE WATER  
DEPTH AND ROAD CONDITION MAY BE UNSAFE.  
 
ADDITIONAL INFORMATION IS AVAILABLE AT  
 
HTTP://WATER.WEATHER.GOV/AHPS2/INDEX.PHP?WFO=FSD  
 
STAY TUNED FOR FURTHER UPDATES BY LISTENING TO NOAA WEATHER RADIO...  
OR YOUR LOCAL RADIO AND TV STATIONS.  
 
THE NEXT SCHEDULED STATEMENT WILL BE ISSUED TOMORROW MORNING.  
 

 
 
IAC149-221547-  
/O.EXT.KFSD.FL.W.0222.000000T0000Z-180924T0316Z/  
/LMRI4.3.ER.180921T0515Z.180921T1800Z.180923T0316Z.NO/  
647 AM CDT FRI SEP 21 2018  
   
..FORECAST FLOODING INCREASED FROM MODERATE TO MAJOR SEVERITY
 
 
THE FLOOD WARNING CONTINUES FOR  
THE FLOYD RIVER AT LE MARS.  
* UNTIL SUNDAY EVENING.  
* AT 05AM FRIDAY THE STAGE WAS 23.80 FEET.  
* MODERATE FLOODING IS OCCURRING AND MAJOR FLOODING IS FORECAST.  
* FLOOD STAGE IS 20.00 FEET.  
* FORECAST...THE RIVER WILL RISE TO 24.7 FEET BY 1 PM FRIDAY.  
* AT STAGES NEAR 24.0 FEET...APPROXIMATELY 2100 ACRES OF FARM LAND  
ARE FLOODED.  
 

 
 
LAT...LON 4291 9610 4291 9603 4282 9614 4275 9618  
4275 9623 4282 9620  
 

 
 
IAC149-221547-  
/O.EXT.KFSD.FL.W.0219.180921T1142Z-180923T1624Z/  
/MRLI4.2.ER.180921T1140Z.180922T0000Z.180922T1624Z.NO/  
647 AM CDT FRI SEP 21 2018  
   
..FORECAST FLOODING INCREASED FROM MINOR TO MODERATE SEVERITY
 
 
THE FLOOD WARNING CONTINUES FOR  
THE FLOYD RIVER AT MERRILL.  
* FROM THIS MORNING TO SUNDAY MORNING.  
* AT 01AM FRIDAY THE STAGE WAS 10.30 (ESTIMATED) FEET.  
* MODERATE FLOODING IS FORECAST.  
* FLOOD STAGE IS 12.00 FEET.  
* AT STAGES NEAR 15.5 FEET...THE WEST APPROACH TO THE BRIDGE ON  
PLYMOUTH COUNTY HIGHWAY C44 AT THE GAGING LOCATION BEGINS TO FLOOD.  
 

 
 
LAT...LON 4275 9623 4275 9618 4269 9624 4263 9627  
4263 9631 4272 9627  
 

 
 
MNC117-SDC101-221547-  
/O.NEW.KFSD.FL.W.0239.180921T1147Z-000000T0000Z/  
/FCRS2.1.ER.180921T0958Z.180921T1100Z.000000T0000Z.NO/  
647 AM CDT FRI SEP 21 2018  
 
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A  
 
* FLOOD WARNING FOR  
THE FLANDREAU CREEK NEAR FLANDREAU.  
* UNTIL FURTHER NOTICE.  
* AT 06AM FRIDAY THE STAGE WAS 9.42 FEET.  
* FLOOD STAGE IS 9.00 FEET.  
* AT STAGES NEAR 9.0 FEET...SIGNIFICANT AMOUNTS OF PASTURE LAND BEGIN  
TO FLOOD.  
 

 
 
LAT...LON 4426 9632 4426 9625 4417 9629 4404 9647  
4404 9656 4407 9654 4407 9649 4418 9636  
 

 
 

 
LOCATION FLOOD LATEST OBSERVED MAXIMUM FORECAST RECENT OBSERVED  
STAGE STAGE TIME STAGE TIME CREST TIME  
 
FLOYD RIVER  
LMRI4 20.0 23.80 FRI 5 AM 24.7 FRI 1 PM  
MRLI4 12.0 E10.30 FRI 1 AM 14.8 FRI 7 PM  
 
FLANDREAU CREEK  
FCRS2 9.0 9.42 FRI 6 AM  
 
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