Silesia, Montana Weather Forecast Discussion

539
FXUS65 KBYZ 230800
AFDBYZ
Area Forecast Discussion
National Weather Service Billings MT
200 AM MDT Tue Sep 23 2025
.KEY MESSAGES...
- Localized valley fog this morning.
- Warm and dry through the weekend.
&&
.DISCUSSION...
Today through Monday...
Today will be a nice fall day with temperatures starting out in
the 30s and 40s before warming up into the 70s under clear to
mostly clear skies. With the recent moisture, localized valley fog
is possible early over south-central Montana and northern
Wyoming, but any fog that does develop should lift around 9AM.
The forecast for the rest of the week into the weekend is warm
(upper 70s and 80s) and dry as upper level ridging builds over the
region. The only weather systems to watch during this time are
two waves passing mainly north of our region through Canada. While
the first looks to remain north enough to be a non-player for our
region, the second wave late Thursday into early Friday has
trended a bit deeper and farther south over the past 24 hours.
Therefore, this could be something to watch should the trend south
continue. At this time, the only impacts from this second system
look to be a dry cold front passage that brings a period of
increased cloud cover and winds to the region, as well as slightly
cooler temperatures for Friday.
By early next week, cluster analysis suggests the upper level
ridge axis could shift east of our region, allowing winds aloft to
back out of the southwest. This would subsequently allow Pacific
moisture and energy to be reintroduced to the region, potentially
bringing back daily precipitation chances mainly over the
mountains and foothills. Arends
.AVIATION...
Localized valley fog is possible this morning for areas that saw
precipitation yesterday. Therefore, KLVM, KBIL, and KSHR could see
fog this morning, but confidence remains lower on impacts to the
runways. Any fog that does develop should dissipate around 15z.
Otherwise, skies will remain mostly clear and winds will remain
mostly light through the TAF period. Archer/Arends
&&
.PRELIMINARY POINT TEMP/POPS...
Tdy Wed     Thu     Fri     Sat     Sun     Mon
-------------------------------------------------------
BIL 073 050/082 051/083 054/080 048/082 052/081 051/082
    0/U 00/U    00/U    00/U    00/U    00/U    00/U
LVM 073 040/082 044/084 046/078 043/081 047/080 045/079
    0/U 00/U    00/U    00/U    00/U    00/U    01/U
HDN 074 045/084 046/085 049/080 046/082 047/082 047/083
    0/U 00/U    00/U    00/U    00/U    00/U    00/U
MLS 075 048/085 048/082 051/080 046/082 051/082 050/082
    0/U 00/U    00/U    00/U    00/U    00/U    00/U
4BQ 072 048/082 048/082 052/078 048/080 053/082 051/081
    0/U 00/U    00/U    00/U    00/U    00/U    00/U
BHK 075 046/083 046/081 049/079 043/080 049/082 048/079
    0/U 00/U    00/U    00/U    00/U    00/U    00/U
SHR 072 042/081 046/083 048/079 043/081 047/082 047/081
    0/U 00/U    00/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