693  
FNUS73 KMPX 191243  
FWSMPX  
 
SPOT FORECAST FOR FORT SITE...MN DMA  
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN  
743 AM CDT TUE OCT 19 2021  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON OCTOBER 19.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
ANOTHER WARM DAY IS EXPECTED, WITH TEMPERATURES EXPECTED TO WARM  
INTO THE UPPER 60S BY MID-AFTERNOON. RELATIVE HUMIDITY IS FORECAST  
TO DROP TO THE 40-45% RANGE BY EARLY AFTERNOON, BUT INCREASING  
CLOUD COVER DURING THE MID AND LATE AFTERNOON SHOULD LIMIT THE  
POTENTIAL FOR RH VALUES TO DROP MUCH BELOW 40%. WINDS WILL START  
OUT SOUTHERLY AROUND 10 MPH, BUT DIMINISH IN SPEED AND BECOME  
WESTERLY THROUGH THE AFTERNOON. A COLD FRONT AND NORTHERLY WIND  
SHIFT IS EXPECTED DURING THE LATE AFTERNOON TO EARLY EVENING, BUT  
THIS LIKELY WILL NOT OCCUR UNTIL SUNSET OR LATER.  
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
TEMPERATURE.........54 AT IGNITION...MAX 70.  
RH..................69 PERCENT AT IGNITION...MIN 44 PERCENT.  
WIND (20 FT)........WINDS SOUTH AT 6 MPH AT IGNITION...OTHERWISE  
SOUTHWEST WINDS 5 TO 6 MPH LATE IN THE MORNING  
BECOMING LIGHT, THEN BECOMING NORTH AROUND 5  
MPH LATE IN THE AFTERNOON.  
MIXING HEIGHT.......700 FT AGL AT IGNITION...OTHERWISE 700-2600 FT  
AGL.  
TRANSPORT WINDS.....SOUTHEAST 3 TO 9 MPH SHIFTING TO THE NORTHEAST  
AROUND 12 MPH LATE IN THE AFTERNOON.  
MIXING WINDS........SOUTHEAST 3 TO 9 MPH SHIFTING TO THE NORTHEAST  
AROUND 12 MPH LATE IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR /5500 KNOT-FT/ AT IGNITION. MAX...POOR  
/12400 KNOT-FT/.  
HAINES INDEX........4 LOW AT IGNITION...MAX 4.  
 
TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM  
TEMP............54 59 62 66 68 70 70 68 65  
RH..............69 60 54 48 47 44 44 47 52  
20 FT WIND DIR..S SW SW SW W W NW NW N  
20 FT WIND SPD..6 6 4 3 3 3 3 4 5  
20 FT WIND GUST.10 8 7 6 5 5 5 6 7  
MIX HGT (KFT)...0.7 1.1 1.3 1.9 2.1 2.4 2.6 1.8 1.1  
TRANSP WIND DIR.SW SW SW SW S S S SE NE  
TRANSP WIND SPD.9 7 5 3 3 3 3 8 12  
MIXING WIND DIR.SW SW SW SW S S S SE NE  
MIXING WIND SPD.9 7 5 3 3 3 3 8 12  
HAINES INDEX....4 4 4 4 4 4 4 4 4  
SDSPL KT-FT/10006 7 5 6 6 7 8 12 11  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.  
TEMPERATURE.........MIN 45.  
RH..................MAX 86 PERCENT.  
WIND (20 FT)........NORTHEAST WINDS 5 TO 9 MPH.  
MIXING HEIGHT.......800-1500 FT AGL.  
TRANSPORT WINDS.....NORTHEAST 14 TO 23 MPH INCREASING TO AROUND 24  
MPH EARLY IN THE MORNING.  
MIXING WINDS........NORTHEAST 14 TO 23 MPH INCREASING TO AROUND 24  
MPH EARLY IN THE MORNING.  
SMOKE DISPERSAL.....POOR TO GOOD (9500-30500 KNOT-FT).  
 
TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM  
TEMP............61 55 52 50 49 47  
RH..............60 72 77 80 80 83  
20 FT WIND......N 6 N 6 N 7 N 8 NE 9 NE 8  
20 FT WIND GUST.10 10 12 13 14 14  
MIX HGT (FT)....800 1200 1200 1400 1400 1400  
TRANSPORT WIND..N 14 N 20 N 22 NE 23 NE 23 NE 23  
MIXING WIND.....N 14 N 20 N 22 NE 23 NE 23 NE 23  
HAINES INDEX....3 3 3 3 3 3  
SDSPL KT-FT/100010 21 23 28 28 29  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS IN THE  
MORNING, THEN RAIN SHOWERS LATE IN THE MORNING.  
CHANCE OF SHOWERS 80 PERCENT.  
TEMPERATURE.........MAX 49.  
RH..................MIN 76 PERCENT.  
WIND (20 FT)........NORTHEAST WINDS 5 TO 10 MPH. GUSTS UP TO 23 MPH  
EARLY IN THE MORNING.  
MIXING HEIGHT.......1600-2100 FT AGL.  
TRANSPORT WINDS.....NORTHEAST 23 TO 26 MPH.  
MIXING WINDS........NORTHEAST 23 TO 26 MPH.  
SMOKE DISPERSAL.....GOOD (34300 KNOT-FT).  
HAINES INDEX........2 VERY LOW.  
 
TIME (CDT) 7 AM 9 AM 11 AM 1 PM 3 PM 5 PM  
TEMP............46 46 47 45 45 45  
RH..............83 83 79 86 82 79  
20 FT WIND......NE 8 NE 9 NE 10 NE 10 NE 9 NE 9  
20 FT WIND GUST.14 16 17 18 18 18  
MIX HGT (FT)....1600 2100 2100 1900 1800 1800  
TRANSPORT WIND..NE 24 NE 25 NE 25 NE 25 NE 25 NE 24  
MIXING WIND.....NE 24 NE 25 NE 25 NE 25 NE 25 NE 24  
HAINES INDEX....2 2 2 2 2 2  
SDSPL KT-FT/100034 46 46 43 39 38  
 

 
FORECASTER...AHASIC  
REQUESTED BY...JASON LINKERT  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2119708.0/MPX  
.EMAIL JASON.D.LINKERT.NFG@MAIL.MIL  
 
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