707
FNUS75 KBYZ 160002
FWSBYZ
SPOT FORECAST FOR GREY...DNRC
NATIONAL WEATHER SERVICE BILLINGS MT
602 PM MDT FRI MAY 15 2026
FORECAST IS BASED ON FORECAST START TIME OF 1800 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
BREEZY CONDITIONS WILL TAPER OFF THIS EVENING WITH THE WINDS BECOMING
LIGHT AND EASTERLY OVERNIGHT. THERE IS ABOUT A 5% FOR A SHOWER THIS
EVENING, BUT NO ACCUMULATION WOULD BE EXPECTED. GUSTY WINDS WOULD BE
POSSIBLE UNDER ANY SHOWER. WINDS WILL TRANSITION BACK TO THE WEST
SATURDAY AFTERNOON WHEN A FRONTAL PASSAGE IS EXPECTED TO MOVE THROUGH.
THE TIMING FOR SHOWERS AND THUNDERSTORMS TO BEGIN LOOKS TO BE BETWEEN
1200-1400 MDT. THUNDERSTORMS ARE EXPECTED TO REMAIN WEAK, BUT GUSTY
WINDS UNDER SHOWERS SATURDAY EVENING WILL BE IN THE 30-40 MPH RANGE.
THERE IS CURRENTLY ABOUT AN 85% CHANCE FOR AT LEAST A QUARTER INCH OF
PRECIPITATION SATURDAY NIGHT THROUGH MONDAY.
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.1 PERCENT.
MIN TEMPERATURE.....39-43.
MAX HUMIDITY........47-52 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHWEST WINDS 5 TO 15 MPH WITH GUSTS TO AROUND 25
MPH IN THE EVENING BECOMING LIGHT.
RIDGETOP...........NORTHWEST AT 20 TO 25 MPH TRANSITIONING EAST AROUND
5 TO 10 MPH LATE EVENING.
MIXING HEIGHT.......DECREASING TO 500 FT AGL OVERNIGHT.
TRANSPORT WINDS.....NORTHEAST AROUND 9 MPH.
SATURDAY
SKY/WEATHER.........PARTLY SUNNY. CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
CWR.................8 PERCENT.
CHANCE OF LIGHTNING.18 PERCENT.
MAX TEMPERATURE.....63-67.
MIN HUMIDITY........25-29 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......EAST WINDS UP TO 5 MPH SHIFTING TO THE WEST 5
TO 9 MPH WITH GUSTS TO AROUND 20 MPH IN THE
AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS IN THE AFTERNOON.
RIDGETOP...........SOUTHEAST AROUND 5 TO 10 MPH TRANSITIONING WEST
TO 15 MPH IN THE AFTERNOON.
MIXING HEIGHT.......INCREASING TO 6900 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST TRANSITIONING WEST AROUND 7 TO 15 MPH.
SATURDAY NIGHT
SKY/WEATHER.........CLOUDY. RAIN SHOWERS IN THE EVENING, THEN RAIN
AND SNOW SHOWERS LIKELY OVERNIGHT.
CWR.................85 PERCENT.
CHANCE OF LIGHTNING.14 PERCENT.
MIN TEMPERATURE.....33-37.
MAX HUMIDITY........87-91 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 6 TO 12 MPH WITH GUSTS TO AROUND 20
MPH.
RIDGETOP...........WEST AROUND 15 MPH.
MIXING HEIGHT.......DECREASING TO 1000 FT AGL OVERNIGHT.
TRANSPORT WINDS.....WEST AROUND 17 MPH.
FORECASTER...STETZER
REQUESTED BY...DUSTIN SCIACCA
TYPE OF REQUEST...WILDFIRE
.TAG 2613719.1/BYZ
.DELDT 05/15/26
.FORMATTERVERSION 2.0.0
.EMAIL MTBDC@FIRENET.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page