Saint Regis, Montana Weather Forecast Discussion

582
FXUS65 KMSO 240724
AFDMSO
Area Forecast Discussion
National Weather Service Missoula MT
124 AM MDT Wed Sep 24 2025
.DISCUSSION...
KEY MESSAGES:
- Warm and Dry Through Thursday
- Cooler and Breezy to end the week
- High Uncertainty Early Next Week: Wide range of possibilities,
  from a return to warm and dry conditions to a cooler, wetter
  pattern.
In the short term, expect cool starts to the day and warmer than
normal afternoons, with little to no wind. West winds become more
prominent Thursday and Friday as a dry trough flattens the ridge.
In response to the lowering of atmospheric heights, temperatures
cool but remain just slightly above normal for this time of year.
Over the weekend the ridge rebounds, IE atmospheric heights
increase, and temperatures warm 4 to 8 degrees as well as winds
becoming terrain driven and lighter.
Looking ahead to early next week, forecast uncertainty becomes
very high. There is significant disagreement among weather models
for the Monday-Tuesday timeframe. Some models keep our region in a
dry and unseasonably warm pattern. In contrast, other models,
particularly some AI-driven guidance, suggest a much cooler and
wetter solution. For now, the official forecast leans toward the
drier, warmer trend, but this could change significantly in the
coming days.
&&
.AVIATION...VFR conditions will prevail through Thursday under
clear skies with light, terrain-driven winds. Each morning will
be cool in the valleys with patchy frost and patchy fog. Patchy
fog will likely follow rivers through valleys and currently is not
mentioned in the Terminal Aerodrome Forecasts.
&&
.MSO WATCHES/WARNINGS/ADVISORIES...
MT...None.
ID...None.
&&
$$

NWS MSO Office Area Forecast Discussion