585
FXUS65 KBYZ 262001
AFDBYZ
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
201 PM MDT SUN OCT 26 2025
KEY MESSAGES
- PERIODS OF WIND TODAY AND MONDAY, STRONGEST OVER THE FOOTHILLS
WEST OF BILLINGS WHERE THERE IS A MODERATE CHANCE OF 50 MPH.
- PERIODS OF PRECIPITATION THROUGH MONDAY. BEST CHANCE OVER THE
LOWER ELEVATIONS IS TONIGHT INTO MONDAY (30 TO 60 PERCENT).
- LIGHT SNOW ACCUMULATIONS POSSIBLE MAINLY OVER THE FOOTHILLS AND
HIGHER HILLS OF THE PLAINS TONIGHT THROUGH MONDAY. WIDESPREAD
SNOW ACCUMULATIONS GREATER THAN 4 INCHES ABOVE 6,000 FT.
- MOSTLY DRY CONDITIONS WITH NEAR TO SLIGHTLY ABOVE NORMAL
TEMPERATURES RETURN TUESDAY INTO THE WEEKEND.
DISCUSSION
TODAY THROUGH SATURDAY...
TONIGHT, A LOW PRESSURE SYSTEM WILL MOVE OUT OF WYOMING BRINGING
PRECIPITATION ON THE BACKSIDE OF THE LOW. THIS PRECIPITATION WILL
ALIGN ALONG A 700 MB FRONTOGENESIS BAND IN FAR SOUTHEAST MONTANA.
TEMPERATURES WILL FALL INTO THE LOW TO MID 30S FOR MANY LOCATIONS
MONDAY MORNING CREATING THE CHANCE (10-20%) OF A RAIN/SNOW MIX
OVER THE HIGHER HILLS EAST OF ROSEBUD COUNTY. THERE IS A 30-60%
CHANCE FOR GREATER THAN 0.25 INCHES OF PRECIPITATION FOR A LINE
SOUTH AND EAST OF FORT SMITH TO MILES CITY. PRECIPITATION CHANCES
FROM THIS SYSTEM ARE EXPECTED TO COME TO AN END MONDAY AFTERNOON.
MONDAY MORNING, AS THE WYOMING LOW IS MOVING OF TO THE EAST, A
COLD FRONT WILL BEGIN TO ENTER THE WESTERN FORECAST AREA. THIS
WILL BRING ADDITIONAL PRECIPITATION CHANCES (20-50%) TO MUCH OF
THE REGION. TEMPERATURES ALONG THE WESTERN FOOTHILLS ARE EXPECTED
TO BE IN THE HIGH 20S TO LOW 30S F BRINGING SNOW AND RAIN/SNOW MIX
DURING THE MORNING HOURS CHANGING TO RAIN DURING THE DAY MONDAY.
ALL SNOW WILL FALL IN THE MOUNTAINS WITH RAIN/SNOW MIX CHANGING TO
RAIN DURING THE DAY FOR THE LOWER ELEVATIONS. THESE PRECIPITATION
CHANCES COME TO AN END MONDAY EVENING INTO OVERNIGHT. MOST
LOCATIONS HAVE A 20-30% CHANCE FOR GREATER THAN 0.25 INCHES OF
PRECIPITATION FROM THIS FRONT. LOCATIONS ALONG THE
ABSAROKA/BEARTOOTH FOOTHILLS HAVE A 10-20% CHANCE OF GETTING
GREATER THAN 1 INCH OF SNOWFALL. THE ABSAROKA/BEARTOOTH MOUNTAINS
HAVE A 20-40% CHANCE OF GETTING GREATER THAN 6 INCHES OF SNOWFALL
WITH A 10-20% CHANCE IN THE BIGHORN MOUNTAINS.
MONDAY WILL SEE 700 MB WINDS OF 30-40 KTS AND DEEP MIXING LEAD TO
BREEZY CONDITIONS FOR MUCH OF THE REGION. MAXIMUM WIND GUSTS IN
THE 30S MPH ARE EXPECTED ACROSS THE REGION WITH THE BEST CHANCES
(30-50%) FOR A WIND GUST OVER 50 MPH BEING LOCATIONS WEST OF A
LINE FROM WHEATLAND COUNTY TO SHERIDAN COUNTY WYOMING.
TEMPERATURES MONDAY AND TUESDAY WILL BE IN THE 40S TO NEAR 50 F.
SHORTWAVE RIDGING EXPECTED IN WEDNESDAY WILL INCREASE TEMPERATURES
INTO THE 50S TO NEAR 60 F. A COLD FRONT EARLY THURSDAY WILL
DECREASE TEMPERATURES BACK INTO THE 40S F FOR MOST LOCATIONS.
TEMPERATURES CLIMB FRIDAY INTO THE WEEKEND REACHING THE 60S F BY
SATURDAY. DRY CONDITIONS ARE EXPECTED DURING THIS PERIOD.
TORGERSON
AVIATION
18Z DISCUSSION...
SCATTERED RAIN AND SNOW SHOWERS WILL BE AROUND FOR THE MAJORITY OF
THE PERIOD. AS A FRONT MOVES IN AFTER 06Z, EXPECT MORE WIDESPREAD
PRECIP THAT MAY COME AS SNOW IN THE FOOTHILLS (KLVM/KSHR) AND A
MIX AT KBIL. CIGS MAY LOWER TO MVFR ACROSS THE REGION WITH THIS
FROPA WITH KLVM/KSHR THE MOST LIKELY TO SEE THESE CONDITIONS AS
WELL. MOUNTAINS WILL BE OBSCURED FOR THE ENTIRE PERIOD.
IN ADDITION TO PRECIP, BREEZY WINDS ARE EXPECTED AT ALL SITES,
ESPECIALLY AFTER THE FROPA, OUT OF THE NW. GUSTS UP TO 30KTS ARE
POSSIBLE AT ALL SITES AFTER 12Z.
PRELIMINARY POINT TEMP/POPS
MON TUE WED THU FRI SAT SUN
-----------------------------------------------------------
BIL 037/049 030/049 027/055 031/053 031/058 043/063 041/058
35/W 00/U 00/B 00/U 00/B 12/W 22/W
LVM 030/043 020/046 023/057 027/054 029/058 039/062 039/059
66/J 00/U 00/B 00/B 00/B 23/W 32/W
HDN 036/049 028/049 022/055 028/053 028/058 038/065 037/057
57/W 10/U 00/B 10/U 00/B 23/W 32/W
MLS 038/051 032/050 024/053 029/052 028/055 038/063 039/057
45/W 10/U 00/B 00/U 00/U 12/W 21/B
4BQ 038/047 031/045 024/052 030/052 029/055 038/062 039/057
67/W 10/U 00/U 00/U 00/U 12/W 21/B
BHK 033/048 028/047 020/052 026/052 026/053 031/060 034/056
76/W 10/N 00/U 00/U 00/B 11/N 21/N
SHR 032/045 023/045 017/055 026/052 026/056 033/064 035/060
67/W 10/U 00/U 00/U 00/B 13/W 22/W
BYZ WATCHES/WARNINGS/ADVISORIES
MT...NONE.
WY...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 6
PM MDT MONDAY FOR ZONE 198.
WEATHER.GOV/BILLINGS
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