Area Forecast Discussion
Issued by NWS Billings, MT

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FXUS65 KBYZ 072228

Area Forecast Discussion
National Weather Service Billings MT
328 PM MST Thu Dec 7 2017

.SHORT TERM...valid for Fri and Sat...

Breezy conditions anticipated tonight from Billings/Roundup and
westward to the mountain foothills as strong pressure gradients
set up across these zones tonight. Locations like Harlowton, Big
Timber and west towards Livingston will see strong winds thanks
to a west-east oriented pressure gradient across the Rocky
mountain front. Folks should expect 45 to 55 mph wind gusts by
early Friday morning along highway 191, and portions of I-90 from
Big Timber to Livingston. Not expecting 60 mph winds across this
area as the northwest/north oriented mid-level flow is not the
most efficient at producing high wind gusts across these areas.
Expect the strongest wind gusts between 3 am and 3 pm Friday
before wind gusts decrease slightly in the evening. Locations east
of Billings/Roundup will see lighter winds overnight...but as
conditions warm tomorrow...wind gusts climb to 25 to 35 mph
before lessening Friday night. A warmer day is anticipated with
high temperatures warming into the low to mid 50s across the
region. Further east, and away from the downslope conditions,
temperatures will be cooler and generally in the 40s in locations
in and east of Miles City/Broadus.

Breezy, warm, and dry, conditions continue along the mountain
foothills through Sunday morning. Temperatures will be in the mid
40s to low 50s on Saturday. Away from the mountain foothills,
expect less wind on Saturday. Dobbs

.LONG TERM...valid for Sun...Mon...Tue...Wed...Thu...

Very few changes were made to the extended forecast with this
issuance. A large ridge of high pressure will basically dominate
the northern Rockies through next week. The axis of the ridge will
mainly be over the Pacific Northwest allowing for a northwest
flow aloft across our forecast area. However, the axis will waver
slightly east and west at times. As a result, as it shifts east,
heights will rise somewhat with milder temperatures, but as it
shifts back west, this will allow for colder air to filter down
into the area, especially close to the Montana/Dakota border. In
addition, pressure gradients will be tight at times from Big
Timber to Livingston resulting in periods of gusty downslope

The best chances for any snow look to be possibly Sunday night
into Monday and Tuesday night into Wednesday as a couple clipper
type systems drop south out of Canada. But at this time, these
systems do not look to have a big impact. Overall, through the
period, conditions look mainly dry with temperatures above normal
with readings in the 40s and 50s. Hooley



VFR will prevail over the area tonight. Surface winds will be
gusty this evening. Then LLWS is possible over south central and
southeast MT and north central WY overnight into Friday morning. RMS



    Fri     Sat     Sun     Mon     Tue     Wed     Thu
BIL 033/056 029/051 033/052 030/049 031/052 030/048 028/043
    00/N    00/N    00/N    00/N    00/N    01/B    11/B
LVM 028/052 028/050 028/048 028/048 031/048 027/044 027/041
    00/N    00/N    00/N    00/U    00/N    01/B    11/B
HDN 027/054 023/052 027/053 027/049 027/053 027/049 026/043
    00/U    00/U    00/U    00/B    00/U    01/B    12/S
MLS 027/047 022/049 026/049 028/045 026/049 027/044 024/039
    00/U    00/U    00/U    01/B    00/U    01/B    12/S
4BQ 029/045 022/049 028/050 027/045 026/050 027/044 025/039
    00/U    00/U    00/U    01/B    00/U    01/B    02/S
BHK 023/040 019/045 024/044 025/041 024/045 024/039 022/035
    00/N    00/U    00/U    11/B    00/B    11/B    02/S
SHR 027/055 024/053 025/053 025/049 025/054 024/046 022/041
    00/U    00/U    00/U    00/B    00/U    01/B    11/B




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