475
FXUS65 KTFX 260004
AFDTFX

Area Forecast Discussion
National Weather Service Great Falls MT
600 PM MDT Wed Sep 25 2024

Updated Aviation Discussion

.SYNOPSIS...
A Pacific front will move eastward across Montana tonight. A few
showers or thunderstorms will affect areas around Glacier Park and
Cut Bank this evening, otherwise dry conditions are expected until
at least Sunday night. Afternoon temperatures will not be as warm
tomorrow, but do return close to 80 degrees for Friday and
Saturday.

&&

.DISCUSSION...
Tonight through Sunday...A Pacific cool front will move eastward
across the CWA tonight. Expect windy conditions to develop over
the northwestern portions of the CWA this evening, and then
continue into Thursday morning. Some probabilities for 60 mph
wind gusts have lowered to about 60 percent. Also, a few isolated
thunderstorms are possible in the Glacier Park/Browning/Cut Bank
areas, with an isolated strong wind gust possible. Thus the high
wind warning will continue. Afternoon temperatures will be
slightly cooler on Thursday, but then warm back up for
Fri/Sat...only to cool a few degrees on Sunday.

Sunday night through Wednesday...Expect a changeable weather
pattern starting Sunday night and then continuing into the middle
portions of next week. At this time, the changes in temperatures
will be most noticeable, as any precipitation that does fall
is expected to light at this time. Also, if any precipitation
does fall Sunday night, it will mostly be over the northern
portions of the CWA. Temperatures early next week do begin to vary
daily, with upper level trofs moving through. Even though
overnight lows will be near freezing at times, day times highs
will mostly be in the 60s/70s. Brusda

&&

.AVIATION...
26/00Z TAF Period

A Pacific cold front crosses the Northern Rockies tonight with a few
showers and thunderstorms tracking NE this evening in the Glacier NP
vicinity and additional showers confined to areas along the
Continental divide north of Lincoln following the frontal passage
late tonight through Thursday morning. Otherwise, an increase in
mainly mid-high level clouds and VFR conditions are expected at most
terminals with primary aviation impacts related to wind.
Gusty/erratic winds are possible near showers/thunderstorms near
Glacier NP this evening with gusty southwest winds elsewhere
diminishing some this evening before re-intensifying and turning
westerly with the arrival and passage of the cold front later
tonight. Mountain wave turbulence and localized low level wind shear
may increase later tonight through Thursday as flow aloft turns more
westerly. Hoenisch

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

&&

.PRELIMINARY POINT TEMPS/POPS...
GTF  53  72  49  81 /  10   0   0   0
CTB  51  64  46  74 /  20   0   0   0
HLN  54  76  48  82 /   0  10   0   0
BZN  49  78  43  82 /   0   0   0   0
WYS  38  71  33  73 /   0   0   0   0
DLN  48  75  42  79 /   0   0   0   0
HVR  54  71  45  83 /  10  10   0   0
LWT  51  71  45  80 /   0   0   0   0

&&

.TFX WATCHES/WARNINGS/ADVISORIES...
High Wind Warning from 9 PM this evening to 3 PM MDT Thursday
for East Glacier Park Region-Eastern Glacier, Western Toole, and
Central Pondera-Eastern Toole and Liberty-Northern High Plains-
Southern High Plains-Southern Rocky Mountain Front.

&&

$$

http://www.weather.gov/greatfalls