169  
FNUS73 KFSD 231240  
FWSFSD  
 
SPOT FORECAST FOR SERTOMA RX...SIOUX FALLS FIRE  
NATIONAL WEATHER SERVICE SIOUX FALLS SD  
740 AM CDT FRI MAY 23 2025  
 
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION  
 
WINDS AT THE SURFACE MAY REMAIN QUITE VARIABLE THROUGHOUT THE  
MORNING AND INTO EARLY AFTERNOON. WHILE AT TIME THERE MAY BE A  
SLIGHT SOUTH TO SOUTHWEST PREFERENCE FOR LIGHT WINDS, BY NOON,  
MOST WINDS WILL TURN NEARLY VARIABLE IN DIRECTION.  
 
CLOUDS THICKEN BY MID-DAY AS WELL, WITH AN INCREASING RISK FOR  
LIGHT RAIN SHOWERS MOVING IN AFTER 2PM. FOCUS FOR LIGHT RAIN  
CONTINUES INTO THE EVENING HOURS.  
 
   
REST OF TODAY  
 
MAX TEMPERATURE.....AROUND 64.  
MIN HUMIDITY........42 PERCENT.  
 
TIME (CDT) 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY COVER.......MC MC MC MC CDY CDY CDY  
SKY (%).........77 80 82 87 92 93 94  
WEATHER COV..... CHC CHC LKY DEF  
WEATHER TYPE.... RW RW RW RW  
TSTM COV........  
CHC OF PCPN (%).10 10 10 30 50 70 100  
CHC OF THDR (%).0 0 10 10 10 10 10  
TEMP............61 63 64 64 63 61 60  
DEWPOINT........42 42 41 41 41 41 43  
RH..............49 45 42 42 44 48 54  
20 FT WIND DIR..SW S S SSE S S SSE  
20 FT WIND SPD..3 3 4 4 5 6 6  
20 FT WIND GUST.5 5 6 6 7 12 10  
MIX HGT (KFT)...4.9 5.2 5.5 5.3 5.1 3.7 2.3  
TRANSP WIND DIR.SW S S SE E SSE S  
TRANSP WIND SPD.6 6 6 7 7 7 8  
SMOKE DISPERSAL.FR FR FR GD GD FR FR  
   
TONIGHT  
 
MIN TEMPERATURE.....AROUND 49.  
MAX HUMIDITY........87 PERCENT.  
 
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY COVER.......CLOUDY CLOUDY CLOUDY CLOUDY CLOUDY CLOUDY  
SKY (%).........94 96 98 93 89 89  
WEATHER COV.....DEFNTE DEFNTE LIKELY CHANCE CHANCE S CHC  
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR  
TSTM COV........  
CHC OF PCPN (%).90 80 60 40 30 20  
CHC OF THDR (%).10 10 10 10 10 10  
TEMP............58 56 53 53 52 50  
DEWPOINT........45 46 47 46 46 46  
RH..............60 68 79 78 81 87  
20 FT WIND......SE 6 E 5 NE 5 NE 3 ENE 5 ENE 5  
20 FT WIND GUST.10 8 7 6 6 7  
MIX HGT (FT)....1600 1200 800 800 700 500  
TRANSPORT WIND..S 6 ESE 8 E 8 ENE 8 ENE 8 ENE 9  
SMOKE DISPERSAL.POOR POOR POOR POOR POOR POOR  
   
SATURDAY  
 
MAX TEMPERATURE.....AROUND 65.  
MIN HUMIDITY........52 PERCENT.  
 
TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM  
SKY COVER.......CLOUDY CLOUDY MCLDY MCLDY MCLDY MCLDY  
SKY (%).........93 91 83 78 77 77  
WEATHER COV.....S CHC S CHC S CHC S CHC S CHC  
WEATHER TYPE....RNSHWR NONE RNSHWR RNSHWR RNSHWR RNSHWR  
TSTM COV........  
CHC OF PCPN (%).20 10 20 20 20 20  
CHC OF THDR (%).10 0 0 0 0 0  
TEMP............49 50 55 59 62 64  
DEWPOINT........45 46 48 46 46 46  
RH..............85 87 78 63 56 53  
20 FT WIND......ENE 6 ENE 6 E 7 E 9 E 9 ESE 8  
20 FT WIND GUST.8 10 12 14 16 15  
MIX HGT (FT)....600 800 1400 2800 3900 4100  
TRANSPORT WIND..ENE 9 E 9 E 13 E 14 E 13 SE 9  
SMOKE DISPERSAL.POOR POOR FAIR GOOD GOOD GOOD  
 
 
FORECASTER...DUX  
REQUESTED BY...FIRB CODY  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2514576.0/FSD  
.DELDT 05/23/25  
.FORMATTERVERSION 2.0.0  
.EMAIL CODY.VOSBURG@SIOUXFALLS.GOV  
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