113
FNUS75 KBYZ 162339
FWSBYZ
SPOT FORECAST FOR WEST FORK...USFS
NATIONAL WEATHER SERVICE BILLINGS MT
539 PM MDT TUE SEP 16 2025
FORECAST IS BASED ON FORECAST START TIME OF 1800 MDT ON SEPTEMBER 16.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
UNSETTLED WEATHER IS EXPECTED THROUGH THE EVENING WITH A CHANCE
OF SHOWERS AND A RUMBLE OF THUNDER POSSIBLE. THEN EXPECT PARTIAL
CLEARING WITH SOME PATCHY FOG. RH READINGS WILL REBOUND WELL
OVERNIGHT. DRIER CONDITIONS WITH AN OVERALL GRADUAL WARMING TREND
IS EXPECTED THROUGH THURSDAY. WINDS WILL BE GENERALLY FROM NORTH,
BUT MAY BE TERRAIN DRIVEN OVERNIGHT INTO EARLY MORNING. BY
THURSDAY, WINDS SHOULD BECOME MORE WEST/NORTHWEST. BT
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING.
CWR.................3 PERCENT.
CHANCE OF LIGHTNING.15 PERCENT.
MIN TEMPERATURE.....31-35.
MAX HUMIDITY........88-92 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTH WINDS 5 TO 10 MPH. GUSTS UP TO 20 MPH IN
THE EVENING. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS IN THE EVENING.
RIDGETOP...........NORTHEAST AROUND 15 MPH.
MIXING HEIGHT.......3100 FT AGL EARLY IN THE EVENING DECREASING TO
700 FT AGL OVERNIGHT.
TRANSPORT WINDS.....NORTH AROUND 11 MPH.
WEDNESDAY
SKY/WEATHER.........SUNNY. PATCHY FOG IN THE MORNING.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....58-62.
MIN HUMIDITY........41-45 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTH WINDS UP TO 6-11 MPH.
RIDGETOP...........NORTHEAST AROUND 11 MPH.
MIXING HEIGHT.......700 FT AGL EARLY IN THE MORNING INCREASING TO
6100 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHEAST AROUND 7-11 MPH.
WEDNESDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....31-35.
MAX HUMIDITY........85-89 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHEAST WINDS 6 TO 9 MPH IN THE EVENING
BECOMING LIGHT.
RIDGETOP...........NORTH AROUND 5 MPH.
MIXING HEIGHT.......4700 FT AGL EARLY IN THE EVENING DECREASING TO
500 FT AGL OVERNIGHT.
TRANSPORT WINDS.....NORTHEAST AROUND 6 MPH.
THURSDAY
SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....62-66.
MIN HUMIDITY........26-30 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING WEST 5 TO 10 MPH IN THE
AFTERNOON.
RIDGETOP...........NORTHWEST AROUND 10 MPH.
MIXING HEIGHT.......400 FT AGL EARLY IN THE MORNING INCREASING TO
7400 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST AROUND 7 MPH.
FORECASTER...TESAR
REQUESTED BY...ZACHARIAH SACHS
TYPE OF REQUEST...WILDFIRE
.TAG 2520413.27/BYZ
.DELDT 09/16/25
.FORMATTERVERSION 2.0.0
.EMAIL ZACHARIAH.SACHS@USDA.GOV,ZACHARIAH.SACHS@FIRENET.GOV
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