285
FNUS75 KBYZ 161332
FWSBYZ
SPOT FORECAST FOR UNIT 51 N BRIDGERS...USFS
NATIONAL WEATHER SERVICE BILLINGS MT
732 AM MDT SAT MAY 16 2026
FORECAST IS BASED ON IGNITION TIME OF 0700 MDT ON MAY 16.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
TODAY WILL BE A TRANSITION DAY, WITH A WEATHER SYSTEM MOVING INTO
THE REGION, BRINGING AN ASSOCIATED COLD FRONT AND INCREASING
CHANCES FOR SHOWERS TO THE BURN SITE. LOOK FOR SOUTHERLY OR
DOWNSLOPE WINDS THIS MORNING TO SHIFT OUT OF THE WEST AROUND MID
DAY WITH THE COLD FRONT. RAIN/SNOW SHOWERS THIS AFTERNOON WILL
TRANSITION TO ALL SNOW THIS EVENING WITH FALLING TEMPERATURES. A
FEW THUNDERSTORMS ARE POSSIBLE WITH THE SHOWERS THIS EVENING.
PERIODS OF SHOWERS ARE FORECAST TO CONTINUE INTO MONDAY NIGHT.
PRECIPITATION TOTALS COULD EXCEED 0.50 INCHES, WITH A FEW INCHES
OF SNOW OVER THE BURN SITE.
TODAY
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SNOW
SHOWERS LATE IN THE MORNING, THEN RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
CWR.................60 PERCENT.
CHANCE OF LIGHTNING.20 PERCENT.
MAX TEMPERATURE.....49-54.
MIN HUMIDITY........32-38 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......DOWNSLOPE/DOWNVALLEY OR SOUTHWEST 3 TO 8 MPH
THIS MORNING, BECOMING WEST UP TO 8 MPH WITH
GUSTS TO AROUND 20 MPH BY AFTERNOON. GUSTY AND
ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS.
RIDGETOP...........SOUTHWEST TO WEST 10 TO 20 MPH.
MIXING HEIGHT.......INCREASING TO 6400 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH, THEN SHIFTING
TO THE WEST AROUND 20 MPH IN THE AFTERNOON.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........92 86 75 70 75 74 79 84 76 79 89
WEATHER COV..... SCH CHC CHC LKY CHC LKY LKY DEF
WEATHER TYPE.... RS RS RW RW RW RW RW RW
TSTM COV........ SCH SCH SCH
CHC OF LTNG (%).0 0 0 0 0 10 10 10 20 20 20
TEMP............39 43 48 49 52 52 52 51 50 46 45
RH..............72 58 39 39 37 39 42 45 49 59 73
20 FT WIND DIR..S S S S SW W W W W W W
20 FT WIND SPD..3 4 5 6 6 8 8 8 8 8 6
20 FT WIND GUST.7 8 12 16 18 18 18 18 17 18 18
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY. RAIN SHOWERS AND SNOW SHOWERS IN
THE EVENING, THEN SNOW SHOWERS LIKELY
OVERNIGHT.
CWR.................85 PERCENT.
CHANCE OF LIGHTNING.10 PERCENT.
MIN TEMPERATURE.....26-30.
MAX HUMIDITY........84-90 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHWEST WINDS 6 TO 12 MPH. GUSTS UP TO 25 MPH
IN THE EVENING.
RIDGETOP...........NORTHWEST 15 TO 25 MPH.
MIXING HEIGHT.......DECREASING TO 700 FT AGL OVERNIGHT.
TRANSPORT WINDS.....NORTHWEST AROUND 20 MPH.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........96 92 95 92 93 95 95 96 95 96 82 78
WEATHER COV.....DEF DEF DEF DEF DEF LKY LKY CHC CHC CHC SCH SCH
WEATHER TYPE....RS RS RS SW SW SW SW SW SW SW SW SW
TSTM COV........
CHC OF LTNG (%).10 10 10 10 10 10 0 0 0 0 0 0
TEMP............42 40 35 34 33 32 32 31 31 30 30 29
RH..............85 85 85 85 85 85 84 84 84 84 84 84
20 FT WIND DIR..NW NW NW NW NW NW W W W W W W
20 FT WIND SPD..9 9 9 10 10 10 9 9 9 7 7 7
20 FT WIND GUST.19 19 20 21 19 18 17 16 16 14 14 14
SUNDAY
SKY/WEATHER.........PARTLY SUNNY. CHANCE OF SNOW SHOWERS THROUGH
THE DAY. SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
CWR.................20 PERCENT.
CHANCE OF LIGHTNING.20 PERCENT.
MAX TEMPERATURE.....37-41.
MIN HUMIDITY........63-67 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 6 TO 10 MPH WITH GUSTS TO AROUND 22
MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS.
RIDGETOP...........WEST 15 TO 25 MPH.
MIXING HEIGHT.......INCREASING TO 6400 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST TO NORTHWEST AROUND 20 MPH.
TIME (MDT) 6 AM 9 AM NOON 3 PM
SKY (%).........70 65 72 71
WEATHER COV.....CHANCE CHANCE CHANCE
WEATHER TYPE....SNSHWR NONE SNSHWR SNSHWR
TSTM COV........ S CHC
CHC OF LTNG (%).0 0 10 20
TEMP............28 31 35 37
RH..............85 74 69 65
20 FT WIND......W 7G18 W 8G20 W 7G19 NW 8G22
FORECASTER...PALMQUIST
REQUESTED BY...JAMES RAY
TYPE OF REQUEST...PRESCRIBED
.TAG 2613551.2/BYZ
.DELDT 05/16/26
.FORMATTERVERSION 2.0.0
.EMAIL JAMES.M.RAY@USDA.GOV
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