694
FXUS65 KBYZ 010224
AFDBYZ

Area Forecast Discussion
National Weather Service Billings MT
724 PM MST Sun Nov 30 2025

.KEY MESSAGES...

- Colder than normal temperatures through Monday morning; morning
  lows from the teens west to single digits below zero east.

- Increased winds along the western foothills Monday night and
  Tuesday; localized blowing snow possible.

- Another system may bring rain and snow showers Tuesday into
  Wednesday (moderate chance).

- Unsettled conditions continue Thursday into the weekend.

&&

.UPDATE...
Dry northerly flow exits over the region this evening. With snow
cover & light winds, temps have dropped quickly since sunset over
eastern valleys. Already -5F at Baker, -3F at Miles City and -2F
at Hardin as of 7pm. Have adjusted forecast lows down a few
degrees accordingly. Flow aloft is becoming anticyclonic and this
will yield warm advection and a modest increase in west winds
along the western foothills tonight. Seeing ~20 mph gusts at
Springdale now. Temps along the western foothills may have already
bottomed out before gradual warming overnight. There is an area of
fog/stratus in Carter County, and all indications are that this
will dissipate overnight with the shift to light downslope winds.
JKL

&&

.DISCUSSION...
Through Saturday...

A surface high will continue to bring cold temperatures into
Monday morning, with lows tonight and early Monday near zero for
many locations. Then, temps will warm to mid 20s over the east to
upper 30s over the west through the day as heights build in from
the west.

A klondike chinook moving through will allow a period of gusty
winds over the western mountains and foothills late Monday into
Tuesday. Currently, there is a 40% chance of wind gusts greater
than 60 mph for the Livingston/Nye area and a 30% chance of gusts
greater than 50 mph for Harlowton and Big Timber. With these
increased winds, blowing snow may become a hazard. This will be
something to monitor.

Tuesday into Wednesday, the chance for precipitation (40-80%)
returns as a splitting trough drops in from the north. Over the
mountains, there is currently a 40-60% chance of at least 4
inches of snow during this system.

Over the plains, precip will begin as snow Tuesday morning.
However, as temps warm in the afternoon, precip may become a
rain/snow mix, particularly along river valleys, before becoming
mostly snow again in the evening. This will limit the potential
for accumulating snow over lower elevations and may bring patches
of ice to roads and sidewalks during the evening commute as
temperatures drop below freezing.

Thursday into the weekend, an unsettled pattern continues, with
multiple disturbances moving through bringing a 30-60% chance for
precip each day. Additionally, there signs for additional periods
of wind over the foothills, particularly Friday into Saturday.
More details will be added as models come into better agreement.

Highs will increase to 30s to near 40 Tuesday. Then, with the next
system moving through, highs on Wednesday will be colder, ranging
from the teens over the east to low 30s over the west. Through the
rest of the week, highs will range from 20s and 30s to 30s and 40s
depending on the timing and speed of the disturbances moving
through. Archer

.AVIATION...

Other than a small area of fog/stratus in Carter County tonight
(which should dissipate before 12z), VFR will prevail regionwide
under building high pressure aloft. SW-W winds will turn breezy
along the western foothills later tonight and Monday. Look for
25-35 knot gusts at KLVM-K6S0-KHWQ. This may cause localized
blowing snow where there is snow cover, but confidence for BLSN
affecting KLVM is low. JKL

&&

.PRELIMINARY POINT TEMP/POPS...

    Mon     Tue     Wed     Thu     Fri     Sat     Sun
-----------------------------------------------------------
BIL 008/032 025/038 019/028 018/036 025/038 025/037 020/034
    00/B    15/W    51/B    01/B    22/W    34/W    31/B
LVM 011/037 026/038 018/034 019/039 025/041 027/041 024/040
    00/N    26/J    40/B    02/J    33/W    45/W    32/J
HDN 000/033 019/038 015/026 011/038 021/038 022/036 016/034
    00/B    16/W    81/B    02/J    43/W    45/W    42/J
MLS 904/028 019/036 011/018 009/035 022/035 017/030 012/031
    00/U    14/W    40/E    01/B    32/J    44/J    31/B
4BQ 004/032 019/036 015/022 013/036 023/036 023/034 019/034
    00/U    03/W    60/E    00/B    31/E    33/J    31/B
BHK 908/024 013/034 003/015 003/033 018/033 012/026 007/029
    00/U    03/J    40/E    00/B    31/E    43/J    31/B
SHR 901/037 017/038 016/029 011/039 020/040 021/039 017/039
    00/U    04/W    81/B    01/B    33/W    34/W    41/B

&&

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

&&

$$
weather.gov/billings