957
FXUS65 KBYZ 010904
AFDBYZ

Area Forecast Discussion
National Weather Service Billings MT
304 AM MDT Sat Nov 1 2025

.KEY MESSAGES...

- Windy conditions return this weekend. First to the common gap
  wind areas around Livingston to Nye today, then to the rest of
  the area tonight into Sunday.

- Mild conditions expected next week with highs in the 50s to
  lower 60s most days. Periods of showers and wind at times.
&&

.DISCUSSION...

Today through Friday...

Heights continue to build over the area today, in response to an
atmospheric river pushing into the Pac NW. Warm and dry conditions
can be expected, with temperatures climbing into the upper 50s to
upper 60s. Breezy southwest to west winds will be found along the
western foothills, strongest from Livingston to Nye (gusts up to
60 mph) with favorable pressure gradients in place. As large
scale troughing continues to work into the West, the overall 500mb
pattern will begin to flatten tonight into Sunday, bringing
increasing mid-level winds (40-60 kts at 700 mb), tightening
pressure gradients (12-15mb IDA-LWT), cooler temperatures, and
shower chances (10-40%). Pressure gradients favor the Livingston
to Nye areas this evening into Sunday morning, spreading into the
Big Timber and Melville foothill areas tonight as well, ahead of
an approaching cold front. Wind gusts by this evening could gust
65 to 70 mph from Livingston to Nye with gusts potentially up to
60 mph near Big Timber. As the cold front approaches from the west
and northwest, areas farther north along US-191 (Harlowton) will
become favored for gap winds by Sunday afternoon. The probability
for wind gusts reaching 50 mph at Harlowton is around 70%, with 60
mph around 50%. Breezy west to northwest winds will spread across
the rest of the area with gusts of 25 to 45 mph common, strongest
over the north. Temperatures in the 50s are forecast for Sunday,
a good 5 to 10 degrees cooler than today. A wind advisory remains
in effect for the Livingston to Nye areas through Sunday morning,
with high wind watches for the US-191 corridor starting tonight
and Sunday morning, continuing into early Sunday evening.

Zonal flow to weak ridging looks to prevail Monday through
Wednesday. Weak waves moving through the flow will bring low
to moderate chances (20-50%) for showers at times, greatest over
the southwest mountains, as well as increased winds for the
western gap areas. Temperatures in the 50s to lower 60s are
forecast most days with lows in the 20s and 30s at night.
Ensembles point to a trough moving into the Northern Rockies on
Thursday, and potentially another system on Friday bringing the
additional precipitation chances and cooler temperatures. STP

.AVIATION...

Breezy to strong southwest winds will continue over the Beartooth
foothills, including KLVM, with gusts around 30-45 kts through the
day, increasing to 45-55 kts for overnight and into Sunday
morning. Sunday morning, winds will turn northwest, with gusts of
25-35 kts expected for all TAF sites by Sunday afternoon and
stronger gusts around 40-50 kts possible near K1KM. Archer

&&

.PRELIMINARY POINT TEMP/POPS...

    Tdy Sun     Mon     Tue     Wed     Thu     Fri
-------------------------------------------------------
BIL 066 045/057 032/053 034/059 035/058 041/060 039/057
    0/U 12/W    00/B    12/W    10/B    11/B    13/W
LVM 066 042/055 028/053 035/055 034/059 038/054 035/052
    0/N 13/W    01/B    33/W    11/E    32/W    25/W
HDN 068 041/057 029/055 030/057 032/060 038/060 035/058
    0/U 12/W    00/B    12/W    10/B    12/W    13/W
MLS 063 042/057 028/053 032/055 031/057 039/061 035/058
    0/B 11/N    00/B    01/E    10/B    11/B    12/W
4BQ 063 041/057 030/055 033/057 033/058 042/058 035/057
    0/B 00/N    00/B    01/B    10/B    01/B    12/W
BHK 059 039/058 025/053 029/056 028/054 034/058 031/057
    0/B 00/N    00/B    00/B    00/B    11/B    11/B
SHR 066 039/060 026/055 030/057 030/060 036/058 032/057
    0/B 00/N    00/U    01/B    10/B    02/W    13/W

&&

.BYZ WATCHES/WARNINGS/ADVISORIES...
MT...High Wind Watch in effect from this evening through Sunday
      evening FOR ZONES 34-141-172.
     High Wind Watch in effect from Sunday morning through Sunday
      evening FOR ZONES 42-63-228.
     Wind Advisory in effect until 11 AM MDT Sunday FOR ZONES
      65-66.
WY...None.

&&

$$
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