357
FNUS75 KBYZ 122214
FWSBYZ
SPOT FORECAST FOR UNIT 51 N. BRIDGERS...USFS
NATIONAL WEATHER SERVICE BILLINGS MT
414 PM MDT TUE MAY 12 2026
FORECAST IS BASED ON IGNITION TIME OF 0700 MDT ON MAY 15.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
FRIDAY WILL FEATURE A MIXED WEST WIND DECREASING THROUGH THE DAY
RESULTING IN TERRAIN DRIVEN INFLUENCE TAKING OVER. TERRAIN DRIVEN
WINDS MAY VARY FROM SW TO E THROUGH THE DAY AND EVENING. SATURDAY
WILL SEE LIGHT WINDS AGAIN WITH THE CHANCE FOR RAIN AND SNOW
SHOWERS. WITH ANY SHOWER WINDS MAY BECOME ERRATIC AND VARIABLE
WITH GUSTS UP TO 30 MPH. THERE IS ONLY A 20 PERCENT CHANCE OF
WETTING RAIN.
FRIDAY
SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.1 PERCENT.
MAX TEMPERATURE.....55-59.
MIN HUMIDITY........20-25 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 10 TO 15 MPH BECOMING SOUTHERLY AND
TERRAIN DRIVEN UP TO 15 MPH.
RIDGETOP...........WEST WINDS 25 TO 35 MPH.
MIXING HEIGHT.......INCREASING TO 11000 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 10 TO 20 MPH INCREASING TO 25 TO 35 MPH IN
THE LATE MORNING AND EARLY AFTERNOON.
TIME (MDT) 7 AM 10 AM 1 PM 4 PM
SKY (%).........9 5 5 13
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE
TSTM COV........
CHC OF LTNG (%).0 0 0 0
TEMP............40 48 54 56
RH..............44 34 28 22
20 FT WIND......W 11 W 10G20 SW 15G20 SW 15G20
FRIDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....36-41.
MAX HUMIDITY........46-50 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WINDS REMAINING TERRAIN DRIVEN UP TO 10 MPH.
RIDGETOP........... WEST WINDS AROUND 30 MPH IN THE EVENING BECOMING
SOUTHWEST AROUND 15 MPH AFTER MIDNIGHT.
MIXING HEIGHT.......DECREASING TO 700 FT AGL IN THE MORNING.
TRANSPORT WINDS..... WEST AROUND 20 MPH DECREASING TO 10 MPH AFTER MIDNIGHT.
TIME (MDT) 6 PM 9 PM MIDNGT 3 AM
SKY (%).........34 34 56 56
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE
TSTM COV........
CHC OF LTNG (%).0 0 0 0
TEMP............57 48 43 39
RH..............21 31 39 44
20 FT WIND......W 10G15 NW 10G15 VRB 4G8 VRB 4G8
SATURDAY
SKY/WEATHER.........PARTLY SUNNY. SLIGHT CHANCE OF RAIN / SNOW SHOWERS
IN THE AFTERNOON.
CWR.................20 PERCENT.
CHANCE OF LIGHTNING.10 PERCENT.
MAX TEMPERATURE.....48-53.
MIN HUMIDITY........35-39 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......TERRAIN DRIVEN WINDS UP TO 10 MPH. POTENTIALLY ERRATIC
WINDS WITH RAIN/SNOW SHOWERS.
RIDGETOP...........SOUTHWEST WINDS 25 TO 35 MPH.
MIXING HEIGHT.......INCREASING TO 10200 FT IN THE AFTERNOON.
TRANSPORT WINDS..... SOUTHWEST AROUND 15 MPH.
FORECASTER...LESTER/MCKEOWN-ROBBIE
REQUESTED BY...JAMES RAY
TYPE OF REQUEST...PRESCRIBED
.TAG 2613491.0/BYZ
.DELDT 05/12/26
.FORMATTERVERSION 2.0.0
.EMAIL JAMES.M.RAY@USDA.GOV
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