927
FNUS75 KBYZ 130828
FWSBYZ
SPOT FORECAST FOR UNIT 51 N BRIDGERS...USFS
NATIONAL WEATHER SERVICE BILLINGS MT
228 AM MDT WED MAY 13 2026
FORECAST IS BASED ON IGNITION TIME OF 0600 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
AFTER AN ACTIVE PERIOD OF WEATHER WEDNESDAY AND THURSDAY WITH THE
THREAT OF DRY THUNDERSTORMS AND WIDESPREAD STRONG WINDS, WE WILL
SEE A RELATIVELY QUIET PERIOD FRIDAY WITH ZONAL FLOW OVER OUR
REGION. HOWEVER, THIS WILL LEAD TO SOMEWHAT BREEZY CONDITIONS LATE
MORNING THROUGH THE AFTERNOON. MINIMUM RH READINGS WILL DROP INTO
THE UPPER TEENS LATE.
CONFIDENCE IS INCREASING THAT ANOTHER WEATHER SYSTEM WILL MOVE
INTO THE REGION SATURDAY. THIS SYSTEM WILL BRING A CHANCE OF
SHOWERS AND A SLIGHT CHANCE OF THUNDERSHOWERS. SOME SNOW IS EVEN
POSSIBLE BY SATURDAY EVENING...THOUGH LITTLE ACCUMULATION IS
EXPECTED AT THIS TIME. SOUTHERLY WINDS SATURDAY MORNING WILL TURN
WESTERLY IN THE AFTERNOON. BT
FRIDAY
SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....54-58.
MIN HUMIDITY........17-21 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 7 TO 16 MPH WITH GUSTS TO AROUND 25
MPH.
RIDGETOP...........WEST AROUND 25 MPH.
MIXING HEIGHT.......1900 FT AGL EARLY IN THE MORNING INCREASING TO
11300 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 17 MPH INCREASING TO 25 MPH.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........12 12 7 7 7 3 3 3 22 22 22
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0
TEMP............40 44 48 50 51 53 54 55 56 56 56
RH..............40 35 31 28 26 24 22 20 19 18 19
20 FT WIND DIR..W W W W W W W W W W W
20 FT WIND SPD..08 09 12 14 15 16 17 17 17 16 14
20 FT WIND GUST.13 16 18 20 22 23 24 24 24 23 22
FRIDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....33-37.
MAX HUMIDITY........44-51 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHWEST WINDS 7 TO 14 MPH WITH GUSTS TO
AROUND 21 MPH, BECOMING LIGHT AND VARIABLE LATE.
RIDGETOP...........WEST AROUND 20-30 MPH.
MIXING HEIGHT.......9800 FT AGL EARLY IN THE EVENING DECREASING TO
0 FT AGL OVERNIGHT.
TRANSPORT WINDS.....WEST 18 MPH.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........35 35 35 50 50 50 40 40 40 45 45 45
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............54 52 49 46 44 42 41 40 38 37 36 36
RH..............20 23 27 31 33 36 38 40 41 42 45 47
20 FT WIND DIR..W W W NW NW NW N N N SE SE SE
20 FT WIND SPD..16 16 16 7 7 7 5 5 5 6 6 6
20 FT WIND GUST.22 22 22 17 17 17 11 11 11 11 11 11
SATURDAY
SKY/WEATHER.........PARTLY SUNNY. SLIGHT CHANCE OF RAIN SHOWERS, POSSIBLY
SNOW SHOWERS LATE IN THE AFTERNOON.
CWR.................5 PERCENT.
CHANCE OF LIGHTNING.9 PERCENT.
MAX TEMPERATURE.....47-52.
MIN HUMIDITY........34-39 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 6 TO 12 MPH. GUSTS UP TO 28 MPH IN
THE LATE MORNING AND AFTERNOON.
RIDGETOP...........WEST AROUND 20 MPH.
MIXING HEIGHT.......500 FT AGL EARLY IN THE MORNING INCREASING TO
7000 FT AGL IN THE AFTERNOON IN THE MORNING AND
EARLY AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 9 TO 17 MPH IN THE MORNING AND EARLY
AFTERNOON.
TIME (MDT) 6 AM 9 AM NOON 3 PM
SKY (%).........52 51 57 66
WEATHER COV..... S CHC S CHC
WEATHER TYPE....NONE NONE RNSN RNSN
TSTM COV........
CHC OF LTNG (%).0 0 10 10
TEMP............36 43 46 48
RH..............44 38 38 41
20 FT WIND......S 6G11 W 8G17 W 12G23 W 12G23
FORECASTER...TESAR
REQUESTED BY...JAMES RAY
TYPE OF REQUEST...PRESCRIBED
.TAG 2613173.3/BYZ
.DELDT 05/13/26
.FORMATTERVERSION 2.0.0
.EMAIL JAMES.M.RAY@USDA.GOV
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