684
FXUS65 KBYZ 290105
AFDBYZ
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE BILLINGS MT
705 PM MDT TUE OCT 28 2025
KEY MESSAGES
- PERIODS OF WIND THROUGH THE WEEK, MAINLY WEDNESDAY/THURSDAY AND
SATURDAY/SUNDAY. STRONGEST ON SUNDAY.
- COOL AND DRY CONDITIONS FOR HALLOWEEN, TEMPS IN THE 40S AND 50S.
UPDATE
A QUIET AND COOL NIGHT FOR MOST OF THE REGION TONIGHT. A
TIGHTENING IDAHO FALLS TO LEWISTOWN PRESSURE GRADIENT OVERNIGHT
AND 700 MB WINDS NEAR 40 KTS WILL LEAD TO INCREASING FOOTHILLS
WINDS WITH LOCATIONS SUCH AS LIVINGSTON AND NYE LIKELY GUSTING
INTO THE 40S OR 50S MPH BY MORNING. MOST LOCATIONS WILL SEE
TEMPERATURES IN THE 20S F DESPITE INCREASING CLOUDS. TORGERSON
DISCUSSION
THROUGH MONDAY...
RIDGING BUILDS OVER THE REGION TONIGHT INTO WEDNESDAY, AHEAD OF AN
APPROACHING SHORTWAVE AND ASSOCIATED COLD FRONT. IN RESPONSE,
PRESSURE GRADIENTS WILL TIGHTEN ALONG THE WESTERN FOOTHILLS,
FAVORING THE LIVINGSTON TO NYE GAP AREAS. THERE IS A MODERATE
CHANCE (60%) FOR WIND GUSTS TO REACH 50 MPH LATE TONIGHT INTO
WEDNESDAY MORNING IN THESE AREAS. WEDNESDAY WILL BE WARMER, WITH
HIGHS IN THE 50S TO NEAR 60 DEGREES AHEAD OF THE AFOREMENTIONED
SHORTWAVE AND COLD FRONT. THE FRONT WILL BE MAINLY DRY WITH THE
BEST CHANCE FOR A SHOWER OR TWO OVER THE NORTHEAST (15% OR LESS
CHANCE). THE MAIN IMPACT WITH THIS FRONT WILL BE BREEZY NW WINDS,
WITH GUSTS IN THE 20-40S MPH (HIGHEST NORTH AND WEST OF BILLINGS).
AS THE WAVE WRAPS UP INTO AN UPPER LOW IN SOUTHERN CANADA,
EVENTUALLY DROPPING THROUGH THE DAKOTAS, EXPECT BREEZY NW WINDS TO
RETURN THURSDAY AFTERNOON AND EVENING IN THE FAR EAST WITH WIND
GUSTS OF 20-40 MPH. TEMPERATURES IN THE UPPER 40S TO LOWER 50S
ARE FORECAST FOR THURSDAY.
RIDGING BRIEFLY REBUILDS FOR FRIDAY, BRINGING DRY, BUT COOL
CONDITIONS FOR HALLOWEEN WITH HIGHS IN THE 40S TO MID 50S. WINDS
LOOK TO BE LIGHT AS WELL.
THE RIDGE BEGINS TO FLATTEN SATURDAY THROUGH SUNDAY AS AN
ATMOSPHERIC RIVER BEGINS PUSHING INTO THE PAC NW. THIS WILL ALLOW
FOR PRESSURE GRADIENTS TO TIGHTEN ALONG THE WESTERN FOOTHILLS,
FAVORING LIVINGSTON TO NYE. CONFIDENCE FOR WINDS TO REACH 50 MPH
IS MODERATE AT THIS TIME. ENSEMBLES CONTINUE TO POINT TO A
POTENTIAL PERIOD OF INCREASED WINDS ACROSS THE ENTIRE AREA AND
SOME PRECIPITATION CHANCES SUNDAY INTO MONDAY (15-40%), THOUGH
THERE REMAINS A GOOD AMOUNT OF UNCERTAINTY. STRONGER RIDGING WOULD
MEAN LESS WIND, WHILE A ZONAL FLOW WOULD BRING A BREEZIER
FORECAST. STP
AVIATION
VFR CONDITIONS WILL PREVAIL THROUGH THE PERIOD. BREEZY SOUTHWEST
WINDS WILL BEGIN TO PICK UP EARLY WEDNESDAY MORNING AT KLVM. THE
STRONGEST GUSTS ARE EXPECTED TO BE FROM 12-18Z, UP TO 45 KTS. TS
PRELIMINARY POINT TEMP/POPS
WED THU FRI SAT SUN MON TUE
-----------------------------------------------------------
BIL 030/058 034/053 029/049 034/063 044/062 036/053 033/054
00/B 00/U 00/B 11/E 23/W 11/B 11/B
LVM 027/060 025/052 026/055 037/062 042/060 033/053 032/057
00/N 00/U 00/U 11/N 33/W 11/B 11/B
HDN 024/058 030/053 025/048 029/062 039/061 033/054 029/055
00/B 00/U 00/B 11/B 34/W 11/U 11/B
MLS 026/056 034/053 026/044 027/060 042/060 033/052 030/052
00/B 00/N 00/B 11/B 22/W 10/U 11/B
4BQ 025/055 034/050 027/044 027/060 042/061 034/052 032/054
00/B 00/U 00/B 01/B 12/W 00/U 10/B
BHK 021/053 029/051 023/043 021/055 036/060 029/052 027/054
00/N 10/N 00/B 00/B 11/N 00/U 00/B
SHR 019/059 027/050 022/047 027/062 037/063 029/052 028/056
00/B 00/U 00/B 01/B 23/W 10/U 11/B
BYZ WATCHES/WARNINGS/ADVISORIES
MT...NONE.
WY...NONE.
WEATHER.GOV/BILLINGS
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