Great Falls, MT

Weather Forecast Office

Montana Fire Weather Decision Support Site

Fire Weather Forecast:

750
FNUS55 KTFX 261000
FWFTFX

Fire Weather Planning Forecast for North-Central Montana
National Weather Service Great Falls MT
400 AM MDT Mon Oct 26 2026

.DISCUSSION...
Expect increasing clouds today, with rain and snow to move across
the districts from west to east tonight. It dries out for most
areas for Tue/Wed, but expect another round of scattered rain/snow
showers to end the work week. Overall afternoon temperatures will
generally be a bit below normal all week. Brusda

MTZ112-262300-
Eastern Glacier/Toole/Central/Eastern Pondera/Liberty-
400 AM MDT Mon Oct 26 2026

.TODAY...
* Sky/Weather...........Partly sunny. Patchy fog in the morning.
* Chance Lightning.......0 percent.
* Max Temperature.......41-48.
24 hr trend......1 degree up...9 degrees up higher elevations.
* Min Humidity..........64-73 percent.
24 hr trend......7 percent up...2 percent up higher elevations.
* Wind (20 FT).
Lower Elevations...Southeast winds 10 to 15 mph.
Ridges.............Southeast winds 10 to 15 mph.
* Mixing Height.........500-2000 ft agl.
* Transport Winds.......Southeast 20 to 25 mph.
* CWR...................0 percent.

.TONIGHT...
* Sky/Weather...........Mostly cloudy. Chance of rain and slight
chance of snow after midnight.
* Chance Lightning.......0 percent.
* Min Temperature.......27-32.
24 hr trend......6 degrees up.
* Max Humidity..........86-96 percent.
24 hr trend......Unchanged...10 percent down higher elevations.
* Wind (20 FT).
Lower Elevations...Windy. Southeast winds 10 to 15 mph
increasing to southwest around 25 mph after midnight.
Ridges.............South winds 10 to 15 mph increasing to
southwest 20 to 25 mph after midnight.
* Mixing Height.........500-1000 ft agl.
* Transport Winds.......Southeast 15 to 20 mph increasing to
southwest around 30 mph after midnight.
* CWR...................10 percent.

.TUESDAY...
* Sky/Weather...........Cloudy then becoming partly sunny. Slight
chance of rain and snow in the morning. Chance of rain in the
afternoon.
* Chance Lightning.......0 percent.
* Max Temperature.......45-53...38-43 higher elevations.
24 hr trend......10 degrees up...unchanged higher elevations.
* Min Humidity..........56-66 percent...68-78 percent higher
elevations.
24 hr trend......11 percent down...5 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...Windy. West winds 25 to 30 mph.
Ridges.............Windy. West winds 20 to 30 mph.
* Mixing Height.........500-2000 ft agl increasing to 2500-4000 ft
agl late in the morning, then increasing to 3500-5000 ft agl late
in the afternoon decreasing to 3000 ft agl late in the afternoon.
* Transport Winds.......West 40 to 45 mph.
* CWR...................10 percent.

.FORECAST DAYS 3 THROUGH 7......
.WEDNESDAY...Windy. Mostly cloudy. Chance of snow and slight
chance of rain. Lows in the upper 20s. Highs in the upper 40s.
West winds around 30 mph.
.THURSDAY...Colder. Mostly cloudy with slight chance of rain and
snow. Lows in the lower 20s. Highs in the mid 30s. North winds
15 to 20 mph.
.FRIDAY...Mostly cloudy with chance of snow. Lows in the mid 20s.
Highs in the upper 30s. East winds 10 to 15 mph.
.SATURDAY...Partly cloudy. Lows in the upper 20s. Highs in the
mid 40s.
.SUNDAY...Partly cloudy. Slight chance of rain and snow. Lows in
the mid 20s. Highs in the mid 40s.

$$

MTZ113-262300-
Hill and Blaine Counties-
400 AM MDT Mon Oct 26 2026

.TODAY...
* Sky/Weather...........Partly sunny.
* Chance Lightning.......0 percent.
* Max Temperature.......44-51...38-43 higher elevations.
24 hr trend......7 degrees up.
* Min Humidity..........65-75 percent...82-92 percent higher
elevations.
24 hr trend......16 percent up.
* Wind (20 FT).
Lower Elevations...Southeast winds 15 to 20 mph.
Ridges.............Southeast winds 15 to 20 mph.
* Mixing Height.........500-2000 ft agl increasing to 2000-2500 ft
agl early in the afternoon.
* Transport Winds.......Southeast around 30 mph.
* CWR...................0 percent.

.TONIGHT...
* Sky/Weather...........Mostly cloudy. Chance of rain after
midnight.
* Chance Lightning.......0 percent.
* Min Temperature.......29-34.
24 hr trend......1 degree up...6 degrees up higher elevations.
* Max Humidity..........93-100 percent.
24 hr trend......20 percent up...unchanged higher elevations.
* Wind (20 FT).
Lower Elevations...Southeast winds 20 to 25 mph.
Ridges.............Southeast winds 15 to 20 mph.
* Mixing Height.........1000-1500 ft agl.
* Transport Winds.......Southeast around 25 mph.
* CWR...................10 percent.

.TUESDAY...
* Sky/Weather...........Cloudy then becoming partly sunny. Slight
chance of snow in the morning. Chance of rain through the day.
* Chance Lightning.......0 percent.
* Max Temperature.......43-51...39-44 higher elevations.
24 hr trend......2 degrees down.
* Min Humidity..........67-77 percent.
24 hr trend......5 percent up...7 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...Southwest winds 10 to 15 mph.
Ridges.............Southwest winds 10 to 15 mph.
* Mixing Height.........1000-2500 ft agl increasing to 3000-4500 ft
agl early in the afternoon.
* Transport Winds.......Southwest 20 to 25 mph increasing to west
around 30 mph in the afternoon.
* CWR...................30 percent.

.FORECAST DAYS 3 THROUGH 7......
.WEDNESDAY...Partly cloudy. Chance of rain. Lows in the lower
30s. Highs around 50. West winds 20 to 25 mph.
.THURSDAY...Mostly cloudy. Slight chance of snow. Lows in the mid
20s. Highs in the lower 40s. North winds 10 to 15 mph.
.FRIDAY...Mostly cloudy with slight chance of snow. Lows in the
upper 20s. Highs around 40. East winds 10 to 15 mph.
.SATURDAY...Mostly cloudy. Slight chance of rain and snow. Lows
in the upper 20s. Highs in the mid 40s.
.SUNDAY...Partly cloudy. Slight chance of rain and snow. Lows in
the upper 20s. Highs in the upper 40s.

$$

MTZ114-262300-
Lewis and Clark National Forest Rocky Mountain District-
Rocky Mountain Front-
400 AM MDT Mon Oct 26 2026

.TODAY...
* Sky/Weather...........Partly sunny. Areas of fog in the morning.
* Chance Lightning.......0 percent.
* Max Temperature.......40-47.
24 hr trend......7 degrees up.
* Min Humidity..........69-79 percent.
24 hr trend......6 percent down...unchanged higher elevations.
* Wind (20 FT).
Lower Elevations...Southeast winds around 5 mph.
Ridges.............Southeast winds around 5 mph.
* Mixing Height.........500-1500 ft agl.
* Transport Winds.......Southeast 15 to 20 mph.
* CWR...................0 percent.

.TONIGHT...
* Sky/Weather...........Mostly cloudy. Chance of rain and snow
through the night.
* Chance Lightning.......0 percent.
* Min Temperature.......29-35.
24 hr trend......7 degrees up.
* Max Humidity..........86-96 percent.
24 hr trend......Unchanged.
* Wind (20 FT).
Lower Elevations...Southwest winds around 5 mph increasing to
20 to 25 mph after midnight.
Ridges.............Windy. Southwest winds 10 to 15 mph
increasing to west around 30 mph after midnight.
* Mixing Height.........500-1000 ft agl.
* Transport Winds.......Southwest 15 to 20 mph increasing to west
around 35 mph after midnight.
* CWR...................10 percent.

.TUESDAY...
* Sky/Weather...........Partly sunny. Chance of snow.
* Chance Lightning.......0 percent.
* Max Temperature.......44-53...32-41 higher elevations.
24 hr trend......7 degrees up...6 degrees down higher
elevations.
* Min Humidity..........53-63 percent...73-83 percent higher
elevations.
24 hr trend......17 percent down...unchanged higher elevations.
* Wind (20 FT).
Lower Elevations...Windy. Southwest winds 25 to 35 mph.
Ridges.............Very windy. Southwest winds 25 to 35 mph.
* Mixing Height.........1000-2500 ft agl increasing to 3500-5000 ft
agl.
* Transport Winds.......West 45 to 50 mph.
* CWR...................0 percent.

.FORECAST DAYS 3 THROUGH 7......
.WEDNESDAY...Windy. Partly cloudy. Chance of snow and slight
chance of rain. Lows in the lower 30s. Highs in the mid 40s.
Southwest winds around 30 mph.
.THURSDAY...Colder. Mostly cloudy with chance of snow and slight
chance of rain. Lows in the mid 20s. Highs in the mid 30s. North
winds 10 to 15 mph.
.FRIDAY...Mostly cloudy with chance of snow. Lows in the mid 20s.
Highs in the upper 30s. East winds 10 to 15 mph.
.SATURDAY...Mostly cloudy. Slight chance of snow. Lows in the
upper 20s. Highs in the mid 40s.
.SUNDAY...Mostly cloudy. Slight chance of rain and snow. Lows in
the upper 20s. Highs in the mid 40s.

$$

MTZ115-262300-
Chouteau and Fergus Counties-
400 AM MDT Mon Oct 26 2026

.TODAY...
* Sky/Weather...........Partly sunny. Areas of fog in the morning.
* Chance Lightning.......0 percent.
* Max Temperature.......46-52...40-47 higher elevations.
24 hr trend......8 degrees up...3 degrees up higher elevations.
* Min Humidity..........61-71 percent.
24 hr trend......3 percent up...11 percent up higher elevations.
* Wind (20 FT).
Lower Elevations...Southeast winds 15 to 20 mph.
Ridges.............Southeast winds 15 to 20 mph.
* Mixing Height.........500-2000 ft agl increasing to 2500 ft agl
late in the afternoon.
* Transport Winds.......Southeast 25 to 30 mph.
* CWR...................0 percent.

.TONIGHT...
* Sky/Weather...........Mostly cloudy. Chance of rain after
midnight.
* Chance Lightning.......0 percent.
* Min Temperature.......31-36.
24 hr trend......8 degrees up.
* Max Humidity..........88-98 percent.
24 hr trend......Unchanged.
* Wind (20 FT).
Lower Elevations...Southeast winds 15 to 20 mph.
Ridges.............Southeast winds 15 to 20 mph shifting to
the southwest after midnight.
* Mixing Height.........500-1000 ft agl.
* Transport Winds.......South 25 to 30 mph.
* CWR...................10 percent.

.TUESDAY...
* Sky/Weather...........Mostly cloudy then becoming mostly sunny.
Slight chance of rain.
* Chance Lightning.......0 percent.
* Max Temperature.......47-54...40-46 higher elevations.
24 hr trend......2 degrees up.
* Min Humidity..........50-60 percent.
24 hr trend......9 percent down.
* Wind (20 FT).
Lower Elevations...Windy. West winds around 25 mph.
Ridges.............West winds 20 to 25 mph.
* Mixing Height.........1000-2000 ft agl increasing to 3000-4000 ft
agl late in the morning, then increasing to 5000-5500 ft agl in
the afternoon decreasing to 2500 ft agl late in the afternoon.
* Transport Winds.......West 30 to 35 mph.
* CWR...................20 percent.

.FORECAST DAYS 3 THROUGH 7......
.WEDNESDAY...Windy. Partly cloudy. Lows in the mid 30s. Highs in
the lower 50s. West winds around 30 mph.
.THURSDAY...Colder. Mostly cloudy. Slight chance of rain. Lows in
the upper 20s. Highs in the lower 40s. North winds 10 to 15 mph.
.FRIDAY...Mostly cloudy with slight chance of snow. Lows in the
upper 20s. Highs in the lower 40s. East winds 10 to 15 mph.
.SATURDAY...Partly cloudy. Slight chance of rain and snow. Lows
around 30. Highs in the upper 40s.
.SUNDAY...Partly cloudy. Slight chance of rain and snow. Lows
around 30. Highs in the upper 40s.

$$

MTZ116-118-262300-
Lincoln Ranger District of the Helena National Forest-
Helena and Townsend Ranger Districts of the Helena National
Forest-
400 AM MDT Mon Oct 26 2026

.TODAY...
* Sky/Weather...........Partly sunny. Areas of dense fog in the
morning.
* Chance Lightning.......0 percent.
* Max Temperature.......42-52.
24 hr trend......11 degrees up.
* Min Humidity..........66-76 percent.
24 hr trend......21 percent down...10 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...Southeast winds 10 to 15 mph.
Ridges.............South winds 10 to 15 mph.
* Mixing Height.........500-2000 ft agl.
* Transport Winds.......South 15 to 20 mph.
* CWR...................0 percent.

.TONIGHT...
* Sky/Weather...........Mostly cloudy. Rain and snow in the
evening, then chance of rain and snow after midnight.
* Chance Lightning.......0 percent.
* Min Temperature.......29-36.
24 hr trend......7 degrees up.
* Max Humidity..........87-97 percent.
24 hr trend......1 percent up...9 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...South winds 10 to 15 mph increasing to
southwest 20 to 25 mph after midnight.
Ridges.............Windy. Southwest winds 10 to 15 mph
increasing to west around 30 mph after midnight.
* Mixing Height.........500-1000 ft agl.
* Transport Winds.......South 15 to 20 mph increasing to west
around 35 mph after midnight.
* CWR...................20 percent.

.TUESDAY...
* Sky/Weather...........Partly sunny. Slight chance of snow in the
morning.
* Chance Lightning.......0 percent.
* Max Temperature.......42-50...34-42 higher elevations.
24 hr trend......2 degrees up.
* Min Humidity..........57-67 percent...67-77 percent higher
elevations.
24 hr trend......9 percent down...unchanged higher elevations.
* Wind (20 FT).
Lower Elevations...Southwest winds 20 to 25 mph.
Ridges.............Windy. Southwest winds around 30 mph
decreasing to 20 to 25 mph in the afternoon.
* Mixing Height.........1000-2500 ft agl increasing to 3500-4500 ft
agl late in the morning, then increasing to 5500-6000 ft agl in
the afternoon decreasing to 3500 ft agl late in the afternoon.
* Transport Winds.......Southwest 35 to 40 mph.
* CWR...................10 percent.

.FORECAST DAYS 3 THROUGH 7......
.WEDNESDAY...Windy. Partly cloudy. Chance of snow. Lows in the
upper 20s. Highs in the mid 40s. Southwest winds around 25 mph.
.THURSDAY...Partly cloudy. Slight chance of rain and snow. Lows
in the mid 20s. Highs in the lower 40s. South winds 15 to 20 mph.
.FRIDAY...Mostly cloudy with slight chance of rain and snow. Lows
in the upper 20s. Highs in the lower 40s. Northeast winds 15 to
20 mph.
.SATURDAY...Mostly cloudy. Chance of rain and snow. Lows around
30. Highs in the mid 40s.
.SUNDAY...Mostly cloudy. Chance of rain and snow. Lows in the
lower 30s. Highs in the mid 40s.

$$

MTZ117-262300-
Central and Eastern Lewis and Clark National Forest Areas-
400 AM MDT Mon Oct 26 2026

.TODAY...
* Sky/Weather...........Mostly sunny. Patchy fog in the morning.
* Chance Lightning.......0 percent.
* Max Temperature.......42-50.
24 hr trend......6 degrees up.
* Min Humidity..........63-73 percent.
24 hr trend......3 percent down...14 percent up higher
elevations.
* Wind (20 FT).
Lower Elevations...Southeast winds 20 to 25 mph.
Ridges.............Southeast winds 10 to 20 mph.
* Mixing Height.........500-2000 ft agl.
* Transport Winds.......Southeast around 25 mph.
* CWR...................0 percent.

.TONIGHT...
* Sky/Weather...........Mostly cloudy. Chance of rain through the
night. Chance of snow after midnight.
* Chance Lightning.......0 percent.
* Min Temperature.......28-35.
24 hr trend......9 degrees up.
* Max Humidity..........84-94 percent.
24 hr trend......Unchanged...14 percent down higher elevations.
* Wind (20 FT).
Lower Elevations...Windy. Southeast winds 20 to 25 mph
shifting to the southwest after midnight.
Ridges.............Windy. South winds 20 to 25 mph increasing
to southwest around 30 mph after midnight.
* Mixing Height.........500-1000 ft agl.
* Transport Winds.......South around 25 mph increasing to southwest
around 35 mph after midnight.
* CWR...................10 percent.

.TUESDAY...
* Sky/Weather...........Mostly sunny. Slight chance of rain and
snow in the morning.
* Chance Lightning.......0 percent.
* Max Temperature.......41-51...34-43 higher elevations.
24 hr trend......7 degrees up...6 degrees down higher
elevations.
* Min Humidity..........57-67 percent.
24 hr trend......17 percent down...2 percent down higher
elevations.
* Wind (20 FT).
Lower Elevations...Very windy. Southwest winds around 35 mph.
Ridges.............Very windy. Southwest winds around 35 mph.
* Mixing Height.........1000-2500 ft agl increasing to 3000-4000 ft
agl late in the morning, then increasing to 5000-5500 ft agl in
the afternoon decreasing to 3500 ft agl late in the afternoon.
* Transport Winds.......West around 45 mph.
* CWR...................10 percent.

.FORECAST DAYS 3 THROUGH 7......
.WEDNESDAY...Windy. Mostly clear. Lows in the upper 20s. Highs in
the mid 40s. Southwest winds around 30 mph.
.THURSDAY...Partly cloudy. Slight chance of rain and snow. Lows
in the mid 20s. Highs around 40. Southwest winds 10 to 15 mph.
.FRIDAY...Mostly cloudy with slight chance of snow. Lows in the
upper 20s. Highs in the lower 40s. East winds 15 to 20 mph.
.SATURDAY...Mostly cloudy. Slight chance of snow and rain. Lows
around 30. Highs in the mid 40s.
.SUNDAY...Partly cloudy. Chance of snow and rain. Lows in the
upper 20s. Highs in the mid 40s.

$$

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431
FXUS65 KTFX 261015
AFDTFX

Area Forecast Discussion
National Weather Service Great Falls MT
415 AM MDT Mon Oct 26 2026

.KEY MESSAGES...

- Dense fog will continue to affect Southwest MT through this
morning.

- Light rain and snow will move from west to east across the CWA
overnight tonight.

- Another round of light rain or snow showers is expected to end
the work week.

- Overall, afternoon temperatures will generally be near to a bit
below normal all week.

&&

.DISCUSSION...

- Meteorological Overview:
Low clouds and dense fog continue to affect Southwest MT this
morning. Increasing high clouds will prevent the dense fog from
expanding in areal coverage, but will also prevent the dense fog
from burning off quickly this morning. Thus the no changes to the
current dense fog advisory statement. Otherwise, the main concern
later today/tonight will be the increasing chances for rain/snow
as the next upper level trof approaches from the West. The
heaviest precipitation should fall in the mountains with this
system, with the southwest mountains being the favored area. Thus
a winter weather advisory has been issued for tonight for the
southwest mountains around Pony, Big Sky and West Yellowstone.

This will be a quick moving trof, with most of the precipitation
ending by early Tuesday morning. For the rest of Tue/Wed, the
airmass will remain a bit unstable for a few passing light
rain/snow showers, but most/if any of the precipitation that falls
should be in the mountains.

For later in the work week...mostly Thu into Fri...an upper level
low will develop off the coast of the Pacific Northwest, but
generally stall over that region. This will result in a moist
southwesterly flow aloft developing over MT, which will allow for
scattered rain/snow showers to move through the CWA from time to
time. The upper level trof will begin to move slowly eastward over
the weekend, and then moving across MT early next week. Thus the
chances for light rain/snow showers will continue for several
days.

Overall, afternoon temperatures will generally be a bit below
normal across the CWA, with a few locations possibly seeing near
normal temperatures Tue/Wed.

- Forecast Confidence & Scenarios:
The main concern tonight will be the light snow across Southwest
MT. Overall snow accumulations look to be on the lighter side,
thus a winter weather advisory has been issued for one mountain
zone...330...for this system. Rain is likely to change to snow at
all elevations by Tue morning, but any snow accumulations at lower
elevations generally look to be less than an inch at this time.

Periods of light snow are expected in the mountains later this
week and into this weekend. Overall most of the snow accumulations
will continue to be on the light side, but a winter statement
might be needed from time to time over portions of the CWA later
this week and into this weekend. Brusda

&&

.AVIATION...
26/12Z TAF Period

The main concern this morning will be areas of dense fog over
Southwest MT, with visibility below 1/2SM at times. The fog will
be a bit slow to burn off, thinking late morning, with low
ceilings continuing into mid afternoon. Then the next round of
light rain/snow moves into the western portions of the CWA by 00z
Tue. Expect this band of precipitation to move from west to east
across the CWA tonight. Mountains/passes will be obscured by
clouds/precipitation across the CWA through the period. Brusda

&&

.PRELIMINARY POINT TEMPS/POPS...
GTF 43 32 51 35 / 0 60 20 0
CTB 43 26 50 28 / 0 40 30 0
HLN 48 33 51 28 / 0 90 10 0
BZN 51 29 47 23 / 0 90 20 0
WYS 48 19 37 15 / 10 100 60 20
DLN 52 31 45 24 / 0 80 0 0
HVR 52 29 50 29 / 0 40 70 40
LWT 49 30 47 29 / 0 60 40 0

&&

.TFX WATCHES/WARNINGS/ADVISORIES...

Dense Fog Advisory until noon MDT today for Beaverhead and
Western Madison below 6000ft-Canyon Ferry Area-Elkhorn and
Boulder Mountains-Gallatin Valley-Gallatin and Madison County
Mountains and Centennial Mountains-Madison River Valley-Missouri
Headwaters-Northwest Beaverhead County.

Winter Weather Advisory from 9 PM this evening to 6 AM MDT
Tuesday for Gallatin and Madison County Mountains and Centennial
Mountains.

&&

$$
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