545  
FNUS63 KFSD 180803  
RFDFSD  
 
RANGELAND FIRE DANGER STATEMENT  
NATIONAL WEATHER SERVICE SIOUX FALLS SD  
303 AM CDT SAT OCT 18 2025  
   
DISCUSSION
 
 
A FRONT WILL SWEEP ACROSS THE AREA ON SATURDAY, BRINGING  
NORTHWESTERLY WINDS TO THE REGION. AT TIMES, WINDS MAY GUST OVER  
30 MPH, WITH 40+ MPH WINDS IN THE MISSOURI RIVER VALLEY. BY LATE  
MORNING, A NARROW BAND OF LIGHT RAIN WILL BEGIN TO MOVE SOUTHEAST,  
EXITING NORTHWEST IOWA IN THE LATE AFTERNOON. A LIGHT WETTING  
RAIN WILL BE POSSIBLE WITH THIS FRONT, BUT TOTAL PRECIPITATION  
WILL LIKELY REMAIN UNDER 0.10 INCHES.  
 
A LOWER WIND DAY IS EXPECTED SUNDAY BEFORE WINDS INCREASE ONCE  
AGAIN BY MONDAY MORNING. THROUGH THE DAY ON MONDAY, AND ESPECIALLY  
BY MONDAY AFTERNOON 35 TO 45 MPH WIND GUSTS MAY BE POSSIBLE.  
WHILE RELATIVE HUMIDITY VALUES REMAIN WELL ABOVE CRITICAL  
THRESHOLDS, WILDFIRE DANGER WILL INCREASE WITH HIGH TO VERY HIGH  
GFDI VALUES EXPECTED.  
 
WINDS MAY CONTINUE TO REMAIN STRONG THROUGH TUESDAY, KEEPING AN  
ELEVATED FIRE DANGER RISK IN THE REGION.  
 
SDZ050-052-057>059-063>066-068-069-181115-  
GREGORY-JERAULD-BRULE-AURORA-DAVISON-CHARLES MIX-DOUGLAS-  
HUTCHINSON-TURNER-BON HOMME-YANKTON-  
   
..HIGH FIRE DANGER
 
 
THE GRASSLAND FIRE DANGER INDEX WILL REACH THE HIGH CATEGORY  
THIS AFTERNOON. UNFAVORABLE WEATHER CONDITIONS AND LOW  
MOISTURE CONTENT OF GRASSES, AND OTHER DRY ORGANIC MATERIAL  
ON THE GROUND, INDICATE THAT THERE IS A HIGH POTENTIAL FOR  
A FIRE TO SPREAD.. OUTDOOR BURNING SHOULD BE RESTRICTED TO  
EARLY MORNING OR EVENING HOURS, WHEN WIND SPEEDS ARE USUALLY  
LOWER AND THE RELATIVE HUMIDITY IS HIGHER.  
 
OUTLOOK FOR SUNDAY AFTERNOON...THE GRASSLAND FIRE DANGER INDEX  
WILL REACH THE MODERATE CATEGORY.  
 
THE GRASSLAND FIRE DANGER PRODUCT REFLECTS FIRE DANGER FOR NATIVE  
GRASSES. IT IS NOT INTENDED FOR CURED AGRICULTURAL CROPS, NOR  
WILL IT REFLECT CONDITIONS IN ROAD DITCHES WHICH HAVE BEEN MOWED.  
 

 
 
IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097-  
098-NEZ013-014-SDZ038>040-053>056-060>062-067-070-071-181115-  
LYON-OSCEOLA-DICKINSON-SIOUX-O'BRIEN-CLAY-PLYMOUTH-CHEROKEE-  
BUENA VISTA-WOODBURY-IDA-LINCOLN-MURRAY-COTTONWOOD-NOBLES-JACKSON-  
PIPESTONE-ROCK-DIXON-DAKOTA-BEADLE-KINGSBURY-BROOKINGS-SANBORN-  
MINER-LAKE-MOODY-HANSON-MCCOOK-MINNEHAHA-UNION-  
   
..MODERATE FIRE DANGER
 
 
THE GRASSLAND FIRE DANGER INDEX WILL REACH THE MODERATE  
CATEGORY THIS AFTERNOON. MARGINAL WEATHER CONDITIONS OR  
LOWERING MOISTURE CONTENT OF GRASSES, AND OTHER DRY ORGANIC  
MATERIAL ON THE GROUND, INDICATE THAT THERE IS SOME POTENTIAL  
FOR A FIRE TO SPREAD. ANY OUTDOOR BURNING SHOULD BE CLOSELY  
MONITORED.  
 
OUTLOOK FOR SUNDAY AFTERNOON...THE GRASSLAND FIRE DANGER INDEX  
WILL REACH THE MODERATE CATEGORY.  
 
THE GRASSLAND FIRE DANGER PRODUCT REFLECTS FIRE DANGER FOR NATIVE  
GRASSES. IT IS NOT INTENDED FOR CURED AGRICULTURAL CROPS, NOR  
WILL IT REFLECT CONDITIONS IN ROAD DITCHES WHICH HAVE BEEN MOWED.  
 

 
 
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