134  
FNUS73 KDLH 240817  
FWSDLH  
 
SPOT FORECAST FOR BYSTROM BAY...USFS  
NATIONAL WEATHER SERVICE DULUTH MN  
317 AM CDT FRI OCT 24 2025  
 
FORECAST IS BASED ON IGNITION TIME OF 0600 CDT ON OCTOBER 24.  
IF THERE ARE QUESTIONS OR CONCERNS WITH THIS FORECAST, OR IF  
CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL  
WEATHER SERVICE IN DULUTH AT 218-729-0653.  
   
DISCUSSION  
 
LIGHT SOUTH WINDS WILL INCREASE THIS AFTERNOON/EVENING. THERE IS  
A CHANCE THAT RAIN COULD DEVELOP THIS EVENING - MODEL GUIDANCE IS  
QUITE VARIED ON THIS. THINKING A FEW SPRINKLES. SOUTH WINDS STAY  
ELEVATED SATURDAY.  
   
TODAY  
 
SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT).  
CHANCE OF PCPN......0 PERCENT.  
MAX TEMPERATURE.....AROUND 47.  
MIN HUMIDITY........52 PERCENT.  
WIND (20 FT)........LIGHT WINDS BECOMING SOUTH AROUND 5 MPH LATE IN  
THE AFTERNOON, THEN BECOMING LIGHT LATE IN THE  
AFTERNOON.  
MIXING HEIGHT.......2100 FT AGL INCREASING TO 2800 FT AGL IN THE  
AFTERNOON.  
TRANSPORT WINDS.....SOUTH 3 TO 8 MPH.  
SMOKE DISPERSAL.....POOR TO FAIR (1300-19500 KNOT-FT).  
PCPN AMOUNT.........0.00 INCHES.  
 
TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM  
SKY COVER.......PCLDY MCLDY MCLDY PCLDY MCLEAR MCLEAR  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 0 0  
TEMP............25 28 33 40 44 47  
RH..............98 94 84 68 57 52  
20 FT WIND......N 0 SE 1 SE 1 S 2 S 3 S 4  
20 FT WIND GUST.2 3 5 8 11 11  
MIX HGT (FT)....400 400 1100 2100 2600 2700  
TRANSPORT WIND..SW 3 S 3 S 5 S 7 S 8 S 8  
SDSPL KT-FT/10001 1 5 13 19 19  
   
TONIGHT  
 
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) THEN BECOMING  
MOSTLY CLOUDY (60-70 PERCENT).  
CHANCE OF PCPN......10 PERCENT.  
MIN TEMPERATURE.....AROUND 34.  
MAX HUMIDITY........94 PERCENT.  
WIND (20 FT)........LIGHT WINDS BECOMING SOUTH 5 TO 6 MPH IN THE  
LATE EVENING AND OVERNIGHT.  
MIXING HEIGHT.......600 FT AGL.  
TRANSPORT WINDS.....SOUTH 8 TO 14 MPH.  
SMOKE DISPERSAL.....POOR (3600 KNOT-FT).  
PCPN AMOUNT.........0.00 INCHES.  
 
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY COVER.......PC PC MC MC MC MC MC MC MC MC MC MC  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CHC OF PCPN (%).0 10 10 10 10 10 10 10 10 0 0 0  
TEMP............43 40 36 37 36 36 35 36 36 36 35 36  
RH..............63 73 84 83 84 84 87 89 90 90 92 94  
20 FT WIND DIR..SE SE SE SE S S S S S S S S  
20 FT WIND SPD..3 3 3 3 4 4 4 4 4 5 5 5  
20 FT WIND GUST.11 11 11 11 11 12 12 12 12 12 12 12  
MIX HGT (KFT)...0.6 0.5 0.4 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.6 0.6  
TRANSP WIND DIR.S S S S S S S S S S S S  
TRANSP WIND SPD.8 9 9 12 12 13 13 13 14 14 14 13  
SDSPL KT-FT/10004 4 4 5 5 6 6 6 6 6 8 6  
   
SATURDAY  
 
SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT).  
CHANCE OF PCPN......0 PERCENT.  
MAX TEMPERATURE.....AROUND 52.  
MIN HUMIDITY........64 PERCENT.  
WIND (20 FT)........SOUTH WINDS 6 TO 7 MPH.  
MIXING HEIGHT.......2400 FT AGL INCREASING TO 2500 FT AGL LATE IN  
THE AFTERNOON.  
TRANSPORT WINDS.....SOUTH 13 TO 18 MPH.  
SMOKE DISPERSAL.....POOR TO FAIR (5800-23900 KNOT-FT) INCREASING TO  
FAIR TO GOOD (26800-40700 KNOT-FT) LATE IN THE  
MORNING.  
PCPN AMOUNT.........0.00 INCHES.  
 
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY COVER.......MC PC PC MCR MCR PC PC PC PC PC PC PC  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............36 36 37 39 42 46 49 50 51 52 52 50  
RH..............94 94 92 92 86 76 68 67 65 64 64 67  
20 FT WIND DIR..S S S S S S S S S S S S  
20 FT WIND SPD..5 5 5 5 6 6 7 7 7 7 7 6  
20 FT WIND GUST.12 12 13 14 14 14 14 15 16 16 16 15  
MIX HGT (KFT)...0.5 0.6 0.9 1.2 1.5 1.7 1.8 2.0 2.2 2.4 2.5 2.2  
TRANSP WIND DIR.S S S S S S S S S S S S  
TRANSP WIND SPD.13 14 16 18 18 18 18 18 18 18 18 17  
SDSPL KT-FT/10006 7 13 19 24 27 30 32 35 38 41 33  
 
 
FORECASTER...JONATHAN  
REQUESTED BY...NATHAN HAFEMAN  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2524387.0/DLH  
.DELDT 10/24/25  
.FORMATTERVERSION 2.0.0  
.EMAIL TRAVIS.DURKIN@USDA.GOV,JEB.BACKE@USDA.GOV,NATHAN.HAFEMAN@USDA.GOV  
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