461
FXUS65 KBYZ 291908
AFDBYZ

Area Forecast Discussion
National Weather Service Billings MT
108 PM MDT Thu Oct 29 2026

.KEY MESSAGES...

- Patchy fog Friday morning and Saturday morning.

- Mostly dry with seasonable temperatures today into Saturday.

- A weather system may bring cooler temperatures, precipitation,
  and windy conditions to the region Sunday into Monday.

&&

.DISCUSSION...

The rest of today through Wednesday...

Winds become light again tonight, which will allow areas of fog
to develop again, especially along river channels. After sunrise
Friday morning, fog will begin to dissipate, eroding by early
afternoon. The same scenario is likely (40-60% chance) Friday
night into Saturday morning.

Otherwise, Friday and Saturday will be mild and mostly dry. There
is a chance (20-50%) for rain and snow showers, primarily over
the mountains, as PWATs increase to 150-200% of normal and weak
shortwaves in the flow provide a little energy. Currently, only
light showers are expected, with a 30% chance of up to 0.10" of
rain and SWE over the mountains.

Sunday into Monday, a low pressure system is expected to move
onshore and through the region. Uncertainty remains in the exact
track and timing of this system. However, there is higher
confidence in conditions becoming breezy Sunday night into Monday
as a cold front associated with the system moves through and in
snow accumulation being limited to the mountains and immediate
foothills. Widespread gusts out of the northwest of 20 to 40 mph
are expected into Monday afternoon. For the plains, the current
best chance (50-70%) for at least 0.50" of rain is from Billings
east. During the overnight hours, particularly Monday night, a
little snow may mix in over the higher hills of, but the chance
of any accumulating snow is less than 20%. Over the mountains,
north facing slopes will be favored for snow. The Bighorns have
the best chance for snow, with a 70% chance of at least 6" through
Monday night. Over the Absaroka/Beartooth mountains, the chance
for the same is 50%, and over the Crazy mountains, the chance is
<20%. Those planning to recreate in the mountains should be
prepared for wintry conditions.

Behind the system exiting late Monday, Tuesday and Wednesday look
to remain mostly dry. A weak cold front late Tuesday into early
Wednesday may bring an isolated shower or two (<20% chance).
Archer

.AVIATION...

Widespread fog and low stratus are expected to impact the region
early Friday leading to IFR and LIFR conditions. These conditions
are expected to begin to form around 12 AM tonight before
becoming more widespread by around 6 AM Friday. Fog is expected
to dissipate throughout the morning and be gone by around 12 PM
Friday. Torgerson

&&

.PRELIMINARY POINT TEMP/POPS...

    Fri     Sat     Sun     Mon     Tue     Wed     Thu
-----------------------------------------------------------
BIL 033/047 034/055 037/053 041/052 036/056 036/052 031/056
    00/B    00/B    03/W    86/W    21/B    11/U    00/B
LVM 027/051 031/057 033/051 032/048 027/052 027/052 027/055
    00/B    12/W    24/W    85/W    11/B    11/U    00/U
HDN 029/052 030/056 032/058 037/053 031/058 031/054 026/059
    00/B    11/E    01/E    87/W    41/B    11/B    10/U
MLS 032/056 039/055 038/058 042/051 034/055 034/050 029/054
    00/B    11/E    11/E    77/W    42/W    11/B    10/B
4BQ 035/058 041/057 039/060 043/049 035/053 034/050 028/054
    00/B    00/E    01/B    78/W    52/W    11/B    10/U
BHK 026/053 039/059 038/059 040/051 031/051 029/048 024/052
    01/E    21/E    11/E    77/W    62/W    11/B    11/B
SHR 027/055 032/058 032/057 035/049 030/057 029/053 025/057
    00/B    11/B    02/W    88/W    41/B    11/B    11/U

&&

.BYZ WATCHES/WARNINGS/ADVISORIES...
MT...None.
WY...None.

&&

$$
weather.gov/billings