752
FXUS65 KBYZ 202339
AFDBYZ

Area Forecast Discussion...Updated
National Weather Service Billings MT
539 PM MDT Thu Aug 20 2026

.KEY MESSAGES...

- Hot and mostly dry today through Friday.

- Weather system brings the chance of precipitation back to the
  region Saturday and Sunday. The risk of severe thunderstorms is
  low. Thunderstorms could produce heavy rainfall.

- Drier with an occasional chance of precipitation next week.

&&

.DISCUSSION...

Today through Wednesday...

Today and Friday will be hot and mostly dry as a ridge of high
pressure builds in aloft. High temperatures during this time will
be in the 80s and 90s, warmest today. While the majority of the
area will remain dry with low humidity, a shower or weak
thunderstorm is possible (15 percent chance) over the Absaroka-
Beartooth Mountains during the afternoon and early evening both
days. In addition, some breezy winds will exist today and Friday,
generally out of the west to northwest today and then out of the
east Friday. The breezy winds will be the most widespread Friday.

Saturday and Sunday will remain hot with high temperatures in the
80s and 90s. The main difference is that the chance of
precipitation returns for both days (25 to 50 percent chance,
greatest over the mountains) as the ridge of high pressure is
replaced by a passing low pressure system to the north. With
precipitable water values well above normal (around 1.0 to 1.5
inches), any showers or thunderstorms that develop Saturday and
Sunday could produce moderate to heavy rainfall. At this time, the
risk of severe thunderstorms is low, though a stronger
thunderstorm cannot be ruled out. In addition to the chance of
precipitation, windy conditions will exist at times both Saturday
and Sunday ahead of and behind a cold front passage. While the
increased atmospheric moisture will limit the fire weather risk a
bit for much of the weekend, dry conditions behind the cold front
Sunday may result in a short period of increased fire weather
conditions.

Monday through Wednesday will remain warm with high temperatures
in the 80s to near 90 degrees. While drier conditions will return,
an occasional chance of precipitation remains. LA

.AVIATION...

00z TAF Discussion...VFR conditions will prevail across the area
for the next 36 hours. An isolated light shower/thunderstorm can`t
be ruled out for the southern mountains through 03z this evening
and again on Friday afternoon/evening, however this activity
should not impact flight conditions. Wildfire smoke concentrations
will remain light to moderate through tomorrow. Do not expect
surface visibility to be restricted by smoke, but slant range
visibility will be impacted at times. Chambers

&&

.PRELIMINARY POINT TEMP/POPS...

    Tdy Fri     Sat     Sun     Mon     Tue     Wed
-------------------------------------------------------
BIL 094 063/091 064/091 064/093 062/087 060/085 061/088
    0/U 00/K    02/W    32/T    31/B    10/B    11/B
LVM 093 056/094 057/089 055/088 051/086 050/084 051/086
    0/B 00/K    03/T    54/T    21/U    21/B    22/T
HDN 094 060/092 062/095 062/095 060/089 057/087 058/090
    0/U 00/K    02/W    32/W    21/B    11/U    11/B
MLS 091 062/090 062/091 067/095 065/089 059/085 058/088
    0/U 00/U    00/U    31/B    20/U    11/U    11/U
4BQ 091 064/092 062/091 066/094 065/089 060/085 059/088
    0/K 00/K    01/B    31/U    31/U    21/B    12/W
BHK 089 057/090 054/088 060/092 061/090 055/085 052/087
    0/U 00/U    00/B    41/B    20/U    10/U    11/U
SHR 093 059/093 058/092 060/091 057/086 055/084 054/086
    0/U 00/K    01/B    33/T    22/T    32/T    22/T

&&

.BYZ WATCHES/WARNINGS/ADVISORIES...
MT...None.
WY...None.

&&

$$
weather.gov/billings