959
FXUS65 KTFX 022304
AFDTFX

Area Forecast Discussion
National Weather Service Great Falls MT
504 PM MDT Tue Sep 2 2025

Aviation Section Updated.

.KEY MESSAGES...

- Hot temperatures persists through Wednesday, with a cool down
  expected Thursday and Friday.

- Mostly dry conditions are expected through the work week, with
  daily chances of showers and thunderstorms moving in for the
  weekend.

- Wildfire smoke from Canada will continue to plague the region
  today and Wednesday.

&&

.DISCUSSION...
/Issued 208 PM MDT Tue Sep 2 2025/

 - Meteorological Overview:

The upper-level ridge parked over the Pacific Northwest will keep
the region mostly dry through the work week and hot temperatures
this afternoon and Wednesday. However, there will be isolated
terrain-induced showers/a rogue thunderstorm this afternoon. A
weak front pushing south from northern MT this afternoon will
bring down smoke and haze from Canadian wildfires through
Wednesday. There will be a relief in the heat on Thursday, as a
cold front pushing through will drop temperatures to below normal
through Friday. This front is expected to mix down gusty winds to
the surface on Thursday.

As we head towards the weekend, a digging trough out towards the
Pacific will bring a southwest flow aloft pattern. Although the
position and strength of this trough remains uncertain, models
hint at there being enough moisture advection and lift to provide
afternoon showers and thunderstorms through the beginning of next
week.Temperatures warm a little bit to near to slightly above
normal during the weekend and the first half of next week.

 - Forecast Confidence & Scenarios:

For winds on Thursday, there`s a 30-50% chance for 34kts wind
gusts across the region. Farther east towards central/eastern
Blaine County, the chances increases to 60-90% chance. This
coincides with where the stronger mid/low level jet is forecasted
to be. In terms of fire weather conditions, minimum relative
humidities and the energy release components in fuels don`t look
to be critical for red flag conditions. However, the gusty winds
will bring an elevated fire weather risk to any new fire starts.

For precipitation this weekend and beginning of next week,
nothing stands out in terms of severe weather chances or abnormal
rainfall amounts with precipitation. Though, we will continue to
monitor trends for stronger storms as we get closer. -Wilson

&&

.AVIATION...
03/00Z TAF Period

VFR conditions will prevail across all terminals during this TAF
Period except at the KHVR and KCTB terminals. Smoke from
wildfires in Canada will reduce visibility to MVFR levels at the
KHVR and KCTB terminals during at least a portion of this
TAF Period. Across all terminals during this TAF Period slantwise
visibility will be reduced by smoke from wildfires in Canada. -IG


Refer to weather.gov/zlc for more detailed regional aviation
weather and hazard information.

&&

.PRELIMINARY POINT TEMPS/POPS...
GTF  53  89  56  72 /   0   0   0   0
CTB  49  87  55  69 /   0   0   0   0
HLN  56  93  58  76 /   0   0   0   0
BZN  51  89  51  80 /   0   0   0   0
WYS  39  81  40  78 /   0   0   0   0
DLN  51  86  51  81 /   0   0   0   0
HVR  50  79  56  70 /   0   0   0   0
LWT  50  81  54  69 /   0   0   0   0

&&

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

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