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FNUS75 KBYZ 300113
FWSBYZ

Spot Forecast for Elk Fire...USFS
National Weather Service Billings MT
713 PM MDT Sun Sep 29 2024

Forecast is based on forecast start time of 1900 MDT on September 29.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office if you have questions
or concerns with this forecast.

.DISCUSSION...

A cold front will quickly shift winds out of the northwest late
this evening around 11 PM MDT. With this, gusts of 30 to 35 mph
are possible with the initial frontal passage. Expect ridgetop
winds to be strong this evening before decreasing by midnight.
Otherwise, breezy northwesterly surface winds will continue behind
the front tonight through Monday before light winds return Monday
evening and night. Winds will turn back out of the southwest
Tuesday. Relative humidities will temporarily increase behind the
front tonight, but will decrease again early Monday morning with
only moderate recoveries again Monday night.

.TONIGHT...

Sky/weather.........Mostly clear.
CWR.................0 percent.
LAL.................1...no thunderstorms.
Min temperature.....33-36.
Max humidity........40-44 percent.
Wind (20 ft)........
 Slope/valley.......West 10 to 15 mph early becoming northwest
                    10 to 15 mph with gusts to 25 mph by 11 PM MDT.
 Ridgetop...........West 30 to 40 mph early decreasing to west to
                    northwest around 15 to 20 mph by midnight.
Mixing height.......Decreasing to 800 ft AGL.
Transport winds.....Northwest around 20 mph.

.MONDAY...

Sky/weather.........Sunny.
CWR.................0 percent.
LAL.................1...no thunderstorms.
Max temperature.....44-48.
Min humidity........26-30 percent.
Wind (20 ft)........
 Slope/valley.......Northwest 9 to 14 mph with gusts to
                    around 25 mph.
 Ridgetop...........West around 20 mph.
Mixing height.......Increasing to 4500 ft AGL.
Transport winds.....Northwest around 20 mph.
Haines index........3.

.MONDAY NIGHT...

Sky/weather.........Mostly clear.
CWR.................0 percent.
LAL.................1...no thunderstorms.
Min temperature.....30-34.
Max humidity........36-40 percent.
Wind (20 ft)........
 Slope/valley.......Downslope/valley 4 to 7 mph.
 Ridgetop...........West around 15 mph.
Mixing height.......Decreasing to 700 ft AGL.
Transport winds.....West around 15 mph.

.TUESDAY...

Sky/weather.........Mostly sunny.
CWR.................0 percent.
LAL.................1...no thunderstorms.
Max temperature.....60-64.
Min humidity........15-19 percent.
Wind (20 ft)........
 Slope/valley.......Southwest 9 to 13 mph.
 Ridgetop...........West around 15 mph.
Mixing height.......Increasing to 4000 ft AGL.
Transport winds.....West around 15 mph.
Haines index........4.

$$
Forecaster...Lester/Arends
Requested by...TRAVIS PARDUE
Type of request...WILDFIRE
.TAG 2423166.2/BYZ
.DELDT 09/29/24
.FormatterVersion 2.0.0
.EMAIL travis.pardue@wyo.gov