076
FXUS65 KBYZ 290142
AFDBYZ

Area Forecast Discussion...Updated
National Weather Service Billings MT
742 PM MDT Wed Oct 28 2026

.KEY MESSAGES...

- Mainly dry with seasonable temperatures through the second half
  of the week.

- Chance of precipitation begins to increase late Friday into
  Saturday ahead of a potential weather system.

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

&&

.UPDATE...

Winds are gradually decreasing this evening as a subtle frontal
boundary sinks south into the area. As of 7:30 PM MDT, this front
is showing up just north of Billings on the Billings weather radar
(KBLX). As this front drops through the region this evening,
higher atmospheric moisture behind the front will allow dew point
temperatures to increase. Then, as surface temperatures cool into
the 20s and lower 30s tonight, dew point depressions could
approach zero in spots. This, combined with light winds, may allow
for patchy fog to develop, especially along the Musselshell and
lower Yellowstone River valleys (20 percent chance). Any fog that
does develop will lift after sunrise tomorrow, Thursday. Thursday
will then be a mild and dry day with high temperatures in the 50s
to lower 60s. Winds will also turn out of the northeast to east
through the day. LA

&&

.DISCUSSION...

Through Tuesday...

Breezy westerly winds along the western foothills and near the
Dakotas border will decrease into the evening hours. There is a
low chance (20% or less) of patchy fog along the Musselshell and
lower Yellowstone river valleys late tonight into Thursday morning
with dewpoint depressions approaching zero and light winds.
Troughing developing along the West Coast and high pressure over
the central US will keep mainly dry conditions and seasonable
temperatures in place into Friday. Energy advecting in from the
southwest brings a return of a low to moderate chance (20-40%) of
snow showers to the western mountains late Friday into Saturday.
High temperatures are forecast from the 40s to 50s most days,
warmest on Saturday.

Heading into early next week (Sunday and Monday), upper troughing
and an associated area of low pressure look to move inland into
the Rockies, bringing the potential for a return of unsettled
conditions to the region. There remains uncertainty in the track
of the low, and with that, the potential for cooler temperatures,
precipitation amounts and wind. Some ensembles show a more
pronounced area of low pressure, tracking it through Wyoming, and
with that the potential for more precipitation (rain and mountain
snow). While other ensembles show a weaker low, bringing less
precipitation, but more wind to the region. Will need to monitor
the system over the coming days, but cooler conditions, moderate
chances for precipitation (40-60%) and wind are all possible.
Drier conditions look to move back into the region for the middle
of next week. STP

.AVIATION...

01z Update...There is about a 20% chance for fog/low stratus at
KMLS from 09-15Z tonight. Lesser confidence (~10%) exists for KBIL
for fog, but VCFG will be included in the TAF for higher
confidence of fog along the river valleys. TS

&&

.PRELIMINARY POINT TEMP/POPS...

    Thu     Fri     Sat     Sun     Mon     Tue     Wed
-----------------------------------------------------------
BIL 029/053 032/047 033/056 038/053 038/050 035/055 033/051
    00/U    00/E    00/B    04/W    75/W    21/B    11/B
LVM 024/054 027/050 032/057 034/050 028/046 027/053 026/051
    00/U    00/B    12/W    26/W    85/W    21/B    11/B
HDN 023/056 029/053 030/058 034/057 036/052 031/057 029/054
    00/U    00/B    00/B    04/W    76/W    31/B    11/B
MLS 027/054 032/056 037/056 038/061 040/052 035/054 034/051
    10/U    00/B    00/B    01/E    76/W    42/W    11/B
4BQ 027/058 035/057 040/058 039/064 041/048 036/052 035/050
    00/U    00/B    00/B    01/E    77/W    52/W    21/B
BHK 023/057 026/055 038/061 037/064 037/052 030/053 029/050
    00/U    01/N    10/E    11/E    67/W    43/W    21/B
SHR 022/058 026/054 033/059 034/058 034/048 030/055 029/053
    00/U    00/B    00/U    04/W    87/W    42/W    21/B

&&

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

&&

$$
weather.gov/billings