Area Forecast Discussion
Issued by NWS Billings, MT

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FXUS65 KBYZ 171548

Area Forecast Discussion
National Weather Service Billings MT
948 AM MDT Sat Mar 17 2018


Quick update this morning to address continued fog situation
across the region. Fog continues to impacting most of the region
this morning, and models indicate most areas may not clear out
today Furthermore, based on expected winds, at least low clouds
and patchy fog will persist most of the day. Have included patchy
fog through the afternoon across the bulk of the region. Also
cooled temps significantly across the region. Highs in low to mid
30s in most location seem much more likely than 40, with cloud
cover and saturated boundary layer in place. AAG


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

Cool and moist conditions are prevalent across the region this
morning in the wake of yesterdays weather disturbance. Widespread
stratus and areas of fog were observed across the region this
morning with some isolated locations seeing visibilities under 1
mile. Expect this fog and stratus to slowly lift this afternoon,
though cloudy conditions will remain in place through much of the
morning and early afternoon. The abundant amounts of low-level
moisture will remain in place through Saturday night so another
round of fog/low-stratus will likely fill back in this evening
across the region.

A piece of energy from a large upper level low will move into
western Montana today and overnight Saturday brining another round
of snow to our mountains and areas north and west of Livingston
and Roundup through the weekend. Can`t rule out a few isolated
rain/snow showers late this afternoon and evening, but
accumulations/rain-amounts, if any, will be light over the area
today outside the mountains.

The main piece of energy from the upper level low will slide into
eastern Colorado on Sunday afternoon but some mid-level lift in
association with this feature will move into eastern Montana and
the western Dakotas and kick off another round of snow along the
Dakotas border Sunday evening. This will be something to watch
over the weekend. For now, expecting 1 to 3 inches of new snow in
these areas Sunday night but amounts could increase in these
areas with future updates. Elsewhere across the rest of the
forecast area, mostly dry conditions are anticipated but can`t
rule out a few isolated rain/snow showers.

As for temperatures not expecting much change in temperatures over
the weekend. Expecting temperature to range from the low 40s along
the mountain foothills to the mid 30s in eastern Montana through
the weekend. Dobbs

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

Work week starts out under an unsettled, albeit un-organized,
long wave pattern. Broad cyclonic flow with split troughs from the
Oregon coast to Saskatchewan. The trough over Saskatchewan tracks
east and the trough over Oregon weakens as ridging builds over the
western CONUS by midweek. Thus, the trends of the forecast remain
in place for the extended. Look for scattered snow showers over
our CWA Monday, mainly over the eastern border and high country.
Drier and warmer conditions by midweek.

Another broad low pressure system takes shape off the Pacific
coast late Wednesday and begins to kick energy into western zones
by Thursday. Pattern looks a bit convective with a good chance of
snow showers for mountain locations and mix of rain/snow showers
in the foothills. Additional energy arrives for Friday through the
weekend with more precipitation and cooler air. The weekend
system could turn out to have some significant impacts, but for
now models are still in some disagreement with its track and
organization. As such, we choose to keep the forecast consistent
and not make any notable changes for the latter part of next
week. BT



Fog and low status will continue through the morning and may
begin to decrease by mid afternoon. Low-level moisture and light
winds are expect to continue which will allow the fog and
stratus to persist. Mountain obscurations will increase over the
Beartooths, Absarokas and Crazys today with scattered rain/snow
showers. BT/Reimer


    Tdy Sun     Mon     Tue     Wed     Thu     Fri
BIL 034 026/040 023/041 026/046 027/050 030/052 031/047
    2/O 41/B    22/J    21/B    00/U    01/B    23/W
LVM 036 024/043 024/043 026/048 027/053 030/056 030/047
    4/O 32/W    32/W    22/W    11/B    12/W    23/W
HDN 036 027/038 021/041 021/044 021/048 024/051 026/045
    2/O 21/B    22/J    21/B    00/U    01/B    23/W
MLS 033 026/034 022/033 019/037 019/043 022/043 025/038
    1/E 22/J    32/J    21/B    00/U    01/B    24/J
4BQ 035 027/036 023/037 021/042 021/046 024/049 026/044
    1/B 13/W    42/J    21/B    00/U    01/B    24/W
BHK 035 025/032 021/032 017/035 017/039 021/040 023/039
    1/E 14/J    63/J    22/J    00/U    01/B    25/J
SHR 036 027/040 022/040 022/045 022/050 026/054 029/047
    2/O 12/W    22/J    21/B    00/U    01/B    23/W




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