875
FNUS75 KBYZ 141251
FWSBYZ

Spot Forecast for Phennock Creek...Custer Co Fire
National Weather Service Billings MT
651 AM MDT Mon Sep 14 2026

Forecast is based on forecast start time of 0700 MDT on September 14.
If conditions become unrepresentative...contact the National Weather
Service.

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

.DISCUSSION...

***Resent due to wrong email***

.DISCUSSION...

A cold frontal passage is expected to move over the fire over the
between now and 0700 MDT. Precipitation is expected to move over the
fire through around 0800 MDT. Around a tenth of an inch of rain has
been common with these showers. There is a small chance for an
embedded thunderstorm through around this same time. Expect west wind
gusts 25 to 35 mph through the morning, increasing to 35 to 45 mph
during the afternoon and lingering through the evening.

.TODAY...

Sky/weather.........Partly cloudy then becoming sunny. Chance of
                    rain showers and slight chance of a thunderstorm
in the early morning.
CWR.................35 percent.
Chance of lightning.15 percent.
Max temperature.....70-74.
Min humidity........25-29 percent.
Wind (20 ft)........
 Slope/valley.......Breezy. Northwest to west winds 11 to 16 mph
increasing to 22 to 27 mph in the afternoon.
Gusts 35 to 45 mph through the afternoon and
early evening.
 Ridgetop...........West around 35 to 45 mph.
Mixing height.......Increasing to 9100 ft AGL in the afternoon.
Transport winds.....West around 25 mph increasing to 40 mph in the
afternoon.

.TONIGHT...

Sky/weather.........Mostly clear.
CWR.................0 percent.
Chance of lightning.1 percent.
Min temperature.....43-47.
Max humidity........93-97 percent.
Wind (20 ft)........
 Slope/valley.......Northwest winds 10 to 24 mph with gusts to
                    around 30 to 40 mph decreasing to 5 to 12 mph
                    with gusts 15 to 20 mph after midnight.
 Ridgetop...........Northwest around 35 mph decreasing to 15 mph.
Mixing height.......Decreasing to 500 ft AGL overnight.
Transport winds.....Northwest around 30 mph decreasing to 15 mph.

$$
Forecaster...Stetzer
Requested by...Cory Cheguis
Type of request...WILDFIRE
.TAG 2621812.1/BYZ
.DELDT 09/14/26
.FormatterVersion 2.0.0
.EMAIL c.cheguis@custercounty.mt.gov