Area Forecast Discussion
Issued by NWS Billings, MT

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132
FXUS65 KBYZ 091608
AFDBYZ

Area Forecast Discussion
National Weather Service Billings MT
908 AM MST Sat Dec 9 2017

.UPDATE...
Quiet weather today with above normal temperatures. no updates.
borsum
&&

.SHORT TERM...valid for Tdy and Sun...

Upper ridge remains anchored over the western U.S. through Sunday
night. Warm, dry and breezy conditions will accompany the ridge,
with the breezy conditions occurring mainly from KBIL W. Some
gusts to 50 mph are possible this morning in the Big Timber area,
due to the pressure gradient in this region. Chances for 50 mph
gusts ramp up again late tonight and continue through Sunday
morning. Some guidance showed high wind criteria being met in Big
Timber during Sun., but confidence in this was low at this time.
This will be something to keep an eye on in future model runs.
Also on Sun., a wave moves S through the area which will help mix
higher winds down into KLVM. Local guidance had a high probability
of 50 mph gusts there. So, given the above, will continue the bar
graph for gusty winds W of KBIL affecting Highway 191 and I-90 at
times.

Based on recent temperature trends, and not much airmass change,
have gone a couple of degrees above blended guidance for high
temperature today. Temperatures on Sun. will be similar to today`s
readings. Arthur

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


Upper ridge dominates the weather over the area through most of
next week. This will keep dry, breezy and warm conditions in
place. Far southeast MT will see a few brief intrusions of cooler
air work in from the east with the passing of occasional upper
disturbances that will bring little to no precipitation. Models
had been progging a fairly strong disturbance to drop through the
area Tuesday night but that has now merged into the stronger flow
north and east of the area and misses the area. Ridge breakdown is
being progged for the end of next week, possibly as early as
Friday but possibly late in the weekend. This will bring more
seasonal temperatures and a chance of snow when it finally occurs.
Chambers
&&

.AVIATION...


VFR conditions will prevail across the forecast area today.
Gusty west to northwest winds will reach 25 to 40kts across the
area today. Chambers
&&

.PRELIMINARY POINT TEMP/POPS...

    Tdy Sun     Mon     Tue     Wed     Thu     Fri
-------------------------------------------------------
BIL 055 035/054 031/048 030/054 032/048 029/048 032/050
    0/N 00/N    00/B    00/U    00/B    00/B    01/B
LVM 049 029/047 029/048 031/050 029/045 027/045 031/047
    0/N 00/N    00/B    00/U    00/B    00/B    12/W
HDN 056 029/055 028/048 027/055 029/049 026/047 029/051
    0/N 00/N    00/U    00/U    00/B    00/B    02/W
MLS 052 028/051 029/043 025/050 029/045 024/042 028/047
    0/U 00/U    00/B    01/U    00/N    10/B    01/B
4BQ 053 030/054 030/044 025/052 029/045 025/043 028/048
    0/N 00/U    00/B    01/U    00/B    10/B    01/B
BHK 048 024/047 026/038 021/045 025/039 021/037 024/043
    0/U 00/U    00/N    01/B    01/N    10/B    01/B
SHR 056 028/056 028/048 025/056 028/047 024/047 027/050
    0/U 00/U    00/U    00/U    00/U    00/B    02/W

&&

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

&&

$$
weather.gov/billings



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