972
FXUS65 KTFX 010529
AFDTFX

Area Forecast Discussion
National Weather Service Great Falls MT
1129 PM MDT Wed Sep 30 2026

Aviation Section Updated.

.KEY MESSAGES...

 - Seasonable temperatures today and tomorrow, with a brief warm
   up through this weekend.

 - Generally dry through next week, with light rain showers
   dissipating this evening.

&&

.DISCUSSION...
/Issued 536 PM MDT Wed Sep 30 2026/

 - Meteorological Overview:

Zonal flow aloft will continue throughout today, before weak
ridging begins to build off to the west tomorrow. This will allow
temperatures to remain seasonable today and tomorrow, with highs
in the mid 60s to low 70s across much of the CWA. Some areas north
of the Hi-Line will see cooler highs in the mid 50s. Light rain
showers will continue across Central/North-Central MT through this
afternoon, dissipating as the evening approaches.

Friday presents a similar situation, with weak ridging aloft
allowing temperatures to continue to warm to highs in the 70s. A
weak shortwave will move through Saturday, causing a brief
cooldown in temperatures, before stronger ridging aloft builds on
Sunday. The upper level high pressure on Sunday and Monday will
cause temperatures to rise, before an upper level trough moves in
lowering temperatures back down to seasonably normal by the middle
of next week.

 - Forecast Confidence & Scenarios:

The weather will be generally mild throughout the forecast
period. However, there is the potential for fire weather concerns
on Monday. High temperatures in the 70s to mid 80s, minimum RH
values in the teens to mid 20s, and winds gusting 20-30 mph are
expected. While at the moment nothing appears critical, we will be
keeping an eye on how these conditions progress. -Dzomba

&&

.AVIATION...
01/06Z TAF Period

VFR conditions are expected to prevail through the TAF period with
persistent mid-level clouds and generally light winds. Patchy fog
is possible overnight at terminals that received rain yesterday
but confidence is not high enough to include it in the TAF.
-thor

&&

.PRELIMINARY POINT TEMPS/POPS...
GTF  43  63  44  77 /  20   0   0   0
CTB  36  59  37  70 /   0   0   0   0
HLN  43  67  41  75 /   0   0   0   0
BZN  40  67  39  75 /   0   0   0   0
WYS  30  67  32  68 /   0   0   0   0
DLN  40  70  41  76 /   0   0   0   0
HVR  38  63  36  73 /   0  10   0   0
LWT  41  61  40  75 /  20  20  10   0

&&

.TFX WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$
http://www.weather.gov/greatfalls