Sanders, Montana Weather Forecast Discussion

948
FXUS65 KBYZ 202014
AFDBYZ
Area Forecast Discussion
National Weather Service Billings MT
214 PM MDT Sat Sep 20 2025
.KEY MESSAGES...
- Dry and warmer conditions into Sunday.
- Weather system late Sunday into Monday brings chance of
  precipitation (40-80% >0.25" west of Rosebud Co), cooler
  temperatures, and gusty northwest winds to the region.
- Warmer and drier conditions return by the middle of next week.
&&
.DISCUSSION...
The rest of today through next Saturday...
Warm and dry conditions will continue into the first half of
Sunday under weak ridging. Then, a weather system and associated
cold front will bring a chance of precipitation and breezy
conditions (20-30 mph) late Sunday into Monday.
Ahead of the front, the chance of showers and thunderstorms will
be 20-40% over the Absaroka/Beartooth mountains and foothills
Sunday afternoon. Then, Sunday evening into Monday, the chance of
precip increases as the front moves through, with a 40-60% chance
of at least 0.25" over the plains for locations west of Rosebud
county and a 60-80% chance of the same over the mountains and
foothills. The chance quickly drops below 20% east of Rosebud
county. The system then exits the region late Monday.
Over the mountains, snow levels are expected to fall to around
9000 ft by Monday morning, allowing a few inches of wet snow over
the highest peaks. Currently, there is only a 20% chance of more
than 4 inches of snow over the highest peaks of the
Absaroka/Beartooth mountains. Only light snow is expected at this
time over the Beartooth pass, with a 15% chance of up to 2 inches
of snow over the Wyoming side of the pass. Those with recreation
or travel plans in the mountains should prepare for wintry
impacts during this time.
After the system exits, warm and dry conditions look to return for
Tuesday into the weekend as upper level ridging builds in again.
High temperatures Sunday will be generally in the 80s, decreasing
Monday behind the front to 60s to low 70s. As ridging builds in,
highs return to generally 80s by the middle of the week into the
weekend. Archer
.AVIATION...
In general, VFR will prevail into Sunday with high pressure
overhead. There is moderate confidence (>50% chance) for an area
of fog/stratus to impact far southeast MT Sunday morning
(09-15z). IFR or lower is possible, and fog may spread far enough
north to include K97M & KBHK. Showers and thunderstorms begin
spreading into the southwest mountains Sunday afternoon as the
next disturbance approaches from the west. STP
&&
.PRELIMINARY POINT TEMP/POPS...
Sun     Mon     Tue     Wed     Thu     Fri     Sat
-----------------------------------------------------------
BIL 055/086 055/066 046/074 049/082 054/081 050/082 052/080
    00/U    76/W    00/U    00/U    00/U    00/U    00/U
LVM 047/081 045/064 036/074 042/082 046/081 045/081 046/079
    02/T    94/W    00/U    00/U    00/U    00/U    01/U
HDN 050/086 052/066 043/074 044/082 046/082 047/083 047/082
    00/U    56/W    10/U    00/U    00/U    00/U    00/U
MLS 050/085 053/069 046/073 048/083 050/081 048/082 049/081
    00/U    14/W    00/U    00/U    00/U    00/U    00/U
4BQ 050/083 053/065 047/070 047/079 051/081 049/081 050/080
    00/U    04/W    10/U    00/U    00/U    00/U    00/U
BHK 046/083 048/069 045/073 046/080 048/079 045/077 047/078
    00/U    01/B    10/U    00/U    00/U    00/U    00/U
SHR 047/083 047/061 040/071 042/079 046/081 045/082 047/080
    00/U    27/T    20/U    00/U    00/U    00/U    00/U
&&
.BYZ WATCHES/WARNINGS/ADVISORIES...
MT...None.
WY...None.
&&
$$
weather.gov/billings

NWS BYZ Office Area Forecast Discussion