435
FNUS75 KBYZ 140922
FWSBYZ
SPOT FORECAST FOR UNIT 51 N BRIDGERS...USFS
NATIONAL WEATHER SERVICE BILLINGS MT
322 AM MDT THU MAY 14 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
DRY ZONAL FLOW WILL PREVAIL ACROSS THE BURN SITE DURING THE
FORECAST PERIOD. IT WILL BE RELATIVELY QUIET FRIDAY, ALBEIT
SOMEWHAT BREEZY. MINIMUM RH READINGS WILL DROP TO THE UPPER TEENS
FOR A BRIEF TIME LATE IN THE DAY.
ANOTHER STRONG WEATHER SYSTEM WILL MOVE INTO THE REGION LATE
SATURDAY. THIS SYSTEM WILL BRING A CHANCE OF SHOWERS AND A SLIGHT
CHANCE OF THUNDERSHOWERS BY MID AFTERNOON. 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. LOOKING AHEAD FURTHER, SUNDAY INTO
EARLY NEXT WEEK LOOKS COOLER WITH A GOOD CHANCE OF RAIN/SNOW
SHOWERS. A COUPLE OF INCHES OF WET SNOW ON THE BURN SITE BY MONDAY
NIGHT IS NOT OUT OF THE QUESTION. BT
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....55-59.
MIN HUMIDITY........17-21 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 6 TO 16 MPH. GUSTS UP TO 28 MPH IN
THE LATE MORNING AND AFTERNOON.
RIDGETOP...........WEST AROUND 30-35 MPH.
MIXING HEIGHT.......1200 FT AGL EARLY IN THE MORNING INCREASING TO
11100 FT AGL IN THE AFTERNOON
TRANSPORT WINDS.....WEST 20-25 MPH.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........36 36 17 17 17 11 11 11 17 17 17
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0
TEMP............41 45 47 49 50 51 53 54 55 55 56
RH..............40 37 35 34 31 29 26 23 21 19 19
20 FT WIND DIR..W W W W W W W W W W W
20 FT WIND SPD..11 11 13 15 17 17 15 15 13 13 13
20 FT WIND GUST.14 14 17 21 23 25 22 21 18 18 18
FRIDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR THEN BECOMING MOSTLY CLOUDY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....35-39.
MAX HUMIDITY........36-40 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHWEST WINDS UP TO 10 MPH IN THE EVENING
BECOMING LIGHT AND MORE VARIABLE.
RIDGETOP...........WEST AROUND 20-25 MPH.
MIXING HEIGHT.......9200 FT AGL EARLY IN THE EVENING DECREASING TO
0 FT AGL OVERNIGHT.
TRANSPORT WINDS.....WEST 20 IN EVENING, THEN DECREASING TO 12 MPH
OVERNIGHT.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........25 25 25 24 24 24 53 53 53 69 69 69
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............55 54 51 47 44 42 41 40 39 39 38 37
RH..............20 21 24 27 30 33 35 36 37 38 39 39
20 FT WIND DIR..NW NW NW NW NW NW W W W S S S
20 FT WIND SPD..10 10 10 7 7 6 5 4 4 4 3 4
20 FT WIND GUST.14 14 14 16 16 16 8 8 8 8 8 8
SATURDAY
SKY/WEATHER.........PARTLY SUNNY. SLIGHT CHANCE OF A LIGHT SHOWER OR SPRINKLE
BEFORE EVENING.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.3 PERCENT.
MAX TEMPERATURE.....55-59.
MIN HUMIDITY........24-28 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING SOUTHWEST 5 TO 7 MPH WITH
GUSTS TO AROUND 21 MPH IN THE AFTERNOON.
RIDGETOP...........SOUTHWEST AROUND 25-30 MPH.
MIXING HEIGHT.......500 FT AGL EARLY IN THE MORNING INCREASING TO
8800 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH 9 MPH INCREASING TO SOUTHWEST 13 TO
22 MPH LATE IN THE MORNING, THEN INCREASING TO
22 TO 30 MPH IN THE AFTERNOON.
TIME (MDT) 6 AM 9 AM NOON 3 PM
SKY (%).........77 70 59 72
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE
TSTM COV........
CHC OF LTNG (%).0 0 10 10
TEMP............38 48 54 55
RH..............38 29 26 29
20 FT WIND......SE 3G10 S 4G12 SW 6G21 W 7G20
FORECASTER...TESAR
REQUESTED BY...JAMES RAY
TYPE OF REQUEST...PRESCRIBED
.TAG 2613550.0/BYZ
.DELDT 05/14/26
.FORMATTERVERSION 2.0.0
.EMAIL JAMES.M.RAY@USDA.GOV
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