020  
FNUS75 KTFX 261807  
FWSTFX  
 
SPOT FORECAST FOR HORSE GULCH...USFS  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
1200 PM MDT FRI JUL 26 2024  
 
RETRANSMITTED...  
 
FORECAST IS BASED ON FORECAST START TIME OF 0600 MDT ON JULY 26.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
FORECAST TEMPERATURES ARE RELATIVELY COOLER, DURING THIS FORECAST  
PERIOD, THAN THEY HAVE BEEN, LATELY. TODAY, WESTERLY TO  
NORTHWESTERLY WINDS GUST UP TO 25 MPH, WITH NORTHWESTERLY WINDS  
GUSTING TO NEAR 20 MPH ON SATURDAY. MINIMUM RELATIVE HUMIDITY  
VALUES AS LOW AS 10% ARE FORECAST. THUNDERSTORMS ARE NOT FORECAST  
TO IMPACT THIS SITE, TODAY; HOWEVER, TOMORROW, THERE IS A SLIGHT  
(<20%) CHANCE OF AFTERNOON/EVENING SHOWERS AND THUNDERSTORMS.  
THESE SHOWERS AND THUNDERSTORM MAY PRODUCE ERRATIC GUSTY WINDS.  
   
TODAY
 
 
SKY/WEATHER.........SUNNY (0-10 PERCENT). HAZE IN THE AFTERNOON.  
CWR.................0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....76-86.  
MIN HUMIDITY........10-15 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......NORTHWEST WINDS AROUND 5 MPH SHIFTING TO THE  
WEST 5 TO 15 MPH IN THE LATE MORNING AND  
AFTERNOON.  
RIDGETOP...........WEST 15 TO 20 MPH INCREASING TO AROUND 25 MPH  
LATE IN THE AFTERNOON.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH EARLY IN THE MORNING.  
 
TIME (MDT) 6 AM 10 AM 2 PM  
SKY (%).........4 4 7  
WEATHER COV..... DEFNTE  
WEATHER TYPE....NONE NONE HAZE  
TSTM COV........  
CWR.............0 0 0  
LAL.............1 1 1  
TEMP............53 64 76  
RH..............42 31 19  
20 FT WIND......NW 5G10 W 10G15 W 10G20  
RIDGETOP WIND...W 20 SW 15 W 15  
HAINES INDEX....M 4 4  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT). HAZE EARLY IN THE  
EVENING. HAZE EARLY IN THE EVENING.  
CWR.................0 PERCENT.  
LAL.................1.  
MIN TEMPERATURE.....51-56.  
MAX HUMIDITY........33-43 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......NORTHWEST WINDS 10 TO 15 MPH SHIFTING TO THE  
NORTH IN THE LATE EVENING AND OVERNIGHT.  
RIDGETOP...........NORTHWEST 20 TO 25 MPH BECOMING WEST AROUND 10  
MPH.  
HAINES INDEX........  
 
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........7 6 9 15 10 14 13 21 24 14 14 8  
WEATHER COV.....DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF  
WEATHER TYPE....HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ  
TSTM COV........  
CWR.............0 0 0 0 0 0 0 0 0 0 0 0  
LAL.............1 1 1 1 1 1 1 1 1 1 1 1  
TEMP............81 79 76 71 68 65 63 61 60 58 57 56  
RH..............15 16 17 19 21 22 24 26 29 30 34 35  
20 FT WIND DIR..NW NW NW N N N N N N N N N  
20 FT WIND SPD..15 15 10 10 10 5 5 5 5 5 5 5  
20 FT WIND GUST.25 20 15 15 10 10 10  
RIDGE WIND DIR..W W NW NW NW NW NW NW W W W W  
RIDGE WIND SPD..25 25 25 20 15 15 10 10 10 10 10 10  
HAINES INDEX....4 4 4 M M M M M M M M M  
   
SATURDAY
 
 
SKY/WEATHER.........SUNNY (15-25 PERCENT). HAZE THROUGH THE DAY.  
AREAS OF SMOKE LATE IN THE AFTERNOON.  
CWR.................0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....79-88.  
MIN HUMIDITY........13-18 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......NORTH WINDS UP TO 5 MPH SHIFTING TO THE WEST  
EARLY IN THE MORNING, THEN SHIFTING TO THE  
SOUTHWEST AROUND 5 MPH LATE IN THE MORNING  
SHIFTING TO THE WEST LATE IN THE MORNING  
SHIFTING TO THE NORTHWEST.  
RIDGETOP...........WEST 10 TO 15 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH EARLY IN THE MORNING.  
 
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........6 3 3 2 4 6 8 8 8 33 33 33  
WEATHER COV.....DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF  
WEATHER TYPE....HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ HAZ  
TSTM COV........  
CWR.............0 0 0 0 0 0 0 0 0 0 0 0  
LAL.............1 1 1 1 1 1 1 1 1 1 1 1  
TEMP............54 57 62 65 69 72 76 79 81 82 83 83  
RH..............36 36 33 31 28 25 22 19 18 17 17 18  
20 FT WIND DIR..N N W S SW SW W W W NW NW NW  
20 FT WIND SPD..5 5 5 5 5 5 5 5 5 10 10 10  
20 FT WIND GUST. 10 10 10 15 15 15 20 20 20  
RIDGE WIND DIR..W SW SW SW SW SW W W W W W W  
RIDGE WIND SPD..10 10 10 10 10 10 10 10 15 15 15 15  
HAINES INDEX....M M 4 4 4 4 4 4 4 4 4 4  
 

 
FORECASTER...FOGLEMAN  
REQUESTED BY...PLANS SEC CHIEF  
TYPE OF REQUEST...WILDFIRE  
.TAG 2418667.6/TFX  
.DELDT 07/26/24  
.FORMATTERVERSION 2.0.0  
.EMAIL  
 
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