636
FNUS75 KBYZ 200918
FWSBYZ
SPOT FORECAST FOR LONESOMEWOOOD RX...USFS
NATIONAL WEATHER SERVICE BILLINGS MT
318 AM MDT SUN SEP 20 2026
FORECAST IS BASED ON IGNITION TIME OF 0600 MDT ON SEPTEMBER 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS OR CONCERNS WITH
THIS FORECAST.
DISCUSSION
A WARMING & DRYING TREND BEGINS TODAY, BUT CANNOT RULE OUT AN
ISOLATED LIGHT SHOWER DURING THE AFTERNOON. AFTER ANOTHER VERY
GOOD HUMIDITY RECOVERY TONIGHT, MONDAY WILL BE WARMER & DRIER WITH
MIN RH NEAR 30 PERCENT. WINDS WILL BE LIGHT AND TERRAIN DRIVEN
THROUGH THE NEXT COUPLE OF DAYS. LOOKING AHEAD, CONFIDENCE IS
INCREASING FOR A SHORT WINDOW OF POTENTIAL SHOWERS LATE TUESDAY
INTO WEDNESDAY. THURSDAY & FRIDAY ARE LOOKING WARM AND DRY.
TODAY
SKY/WEATHER.........MOSTLY CLOUDY EARLY, THEN PARTLY SUNNY. ISOLATED
AFTERNOON SHOWERS.
CWR.................LESS THAN 5 PERCENT.
CHANCE OF LIGHTNING.5 PERCENT.
MAX TEMPERATURE.....58-62.
MIN HUMIDITY........52-56 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......DOWNSLOPE/DOWNVALLEY 1-4 MPH EARLY, THEN EAST
3-7 MPH.
RIDGETOP...........NORTHWEST 5-9 MPH.
MIXING HEIGHT.......INCREASING TO 5000 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 8 MPH.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........80 77 69 55 45 48 36 32 40 35 43 35
WEATHER COV..... ISO ISO ISO ISO ISO ISO
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........
CHC OF LTNG (%).0 0 0 0 0 0 0 5 5 5 5 5
TEMP............40 38 40 41 45 49 52 55 56 58 60 58
RH..............100 100 99 96 91 85 78 71 65 58 54 55
20 FT WIND DIR..W W W W NW NE E E E SE E E
20 FT WIND SPD..1 1 1 1 1 2 3 4 5 5 4 4
20 FT WIND GUST.2 2 2 3 3 4 6 6 6 7 7 7
TONIGHT
SKY/WEATHER.........CLEARING.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....30-34.
MAX HUMIDITY........90-95 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......DOWNSLOPE/DOWNVALLEY 1-4 MPH.
RIDGETOP...........WEST TO NORTHWEST 4-7 MPH.
MIXING HEIGHT.......DECREASING TO 400 FT AGL OVERNIGHT.
TRANSPORT WINDS.....WEST 4 MPH.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........45 46 43 31 24 21 17 20 19 20 16 12
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF LTNG (%).5 0 0 0 0 0 0 0 0 0 0 0
TEMP............56 54 49 45 44 43 41 40 39 37 35 33
RH..............56 63 68 72 74 77 80 86 88 89 90 93
20 FT WIND DIR..E SE SW W W W W NW W W NW W
20 FT WIND SPD..2 2 1 1 1 1 1 2 3 3 2 3
20 FT WIND GUST.5 4 2 4 2 2 2 3 4 4 3 4
MONDAY
SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....65-69.
MIN HUMIDITY........33-37 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......DOWNSLOPE/DOWNVALLEY 1-4 MPH EARLY, THEN EAST
TO SOUTHEAST 4-8 MPH.
RIDGETOP...........SOUTHWEST TO WEST 5-10 MPH.
MIXING HEIGHT.......INCREASING TO 6500 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 9 MPH.
TIME (MDT) 6 AM 9 AM NOON 3 PM
SKY (%).........10 14 8 7
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE
TSTM COV........
CHC OF LTNG (%).0 0 0 0
TEMP............34 39 57 65
RH..............98 92 57 36
20 FT WIND......NW 1G2 SE 1G4 E 3G6 E 4G8
FORECAST DAYS 3 THROUGH 7
TUESDAY
PARTLY SUNNY. SLIGHT CHANCE OF SHOWERS LATE. LOWS IN THE MID 30S.
HIGHS IN THE UPPER 60S. LIGHT TERRAIN-DRIVEN WINDS.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS IN THE UPPER 30S.
HIGHS IN THE UPPER 60S. WEST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 70S.
SOUTHWEST WINDS 10 TO 15 MPH.
FRIDAY
MOSTLY CLEAR. LOWS AROUND 40. HIGHS IN THE LOWER 70S.
SATURDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS IN THE LOWER 40S.
HIGHS IN THE UPPER 60S.
FORECASTER...LESTER
REQUESTED BY...CHRIS ENRIQUEZ
TYPE OF REQUEST...PRESCRIBED
.TAG 2621360.11/BYZ
.DELDT 09/20/26
.FORMATTERVERSION 2.0.0
.EMAIL NICHOLAS.NELSON@USDA.GOV,TYLER.KUHN@USDA.GOV,CHRISTIAN.ENRIQUEZ@USDA.GOV
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