Weather Service Report

FXUS65 KBYZ 210952

Area Forecast Discussion
National Weather Service Billings MT 
352 AM MDT Fri Oct 21 2016

.SHORT TERM...valid for Tdy and Sat...

Quiet weather in store across the forecast area through the short
term. High pressure ridging will build across the northern Rockies
today resulting in rising heights and mild temperatures. Pressure
gradients will begin to slacken later this morning across the
Upper Yellowstone and Stillwater Valleys as a surface low moves
east across southern Canada. As a result, the strong gusty winds
across these areas will subside. Afternoon temperatures will be in
the lower 60s west and central with middle 60s to near 70 degrees
across the southeast.

For Saturday, high pressure ridging gets flattened somewhat as a
disturbance moves across the northern half of the state. This will
sweep a Pacific cold front across the area late morning/early
afternoon ushering in gusty northwest winds. The majority of the
energy with the disturbance will stay north of our forecast area
across north central and northeast Montana. However, a slight
shower chance will be possible from northern Park County into
Wheatland County. Temperatures Saturday will be slightly cooler
but still above normal for this time of year. Hooley

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

Sunday anticyclonic flow over the area brings increased sunshine
but weak high pressure over eastern Montana and the Dakotas will
keep a light upslope weak mixing scenario across the forecast
area. This will keep temperatures in the 5 to 7 degrees above
normal range. Monday a surface trough begins to form over the area
bringing better mixing and warming temperatures and additional 5
degrees on average. 

Monday night a bit of subtropical moisture streams into the area
as the ridge axis slides a bit eastward. Little in the way of
dynamic support but enough for mountain showers with not much
reaching the ground.

Tuesday and beyond look to have a mostly west flow aloft with
troughing in the lee of the rockies. Pattern does not want to be
too windy and wants to stay mostly dry aside from some orographic
precipitation. Not a strong downslope over the plains but enough
to keep mixing going with above normal temperatures and making it
hard for precipitation to reach the ground. borsum 



Winds will be decreasing at KLVM during the morning hours.
Otherwise only high level clouds expected through the period with
no impacts to aviation expected. borsum 



    Tdy Sat     Sun     Mon     Tue     Wed     Thu     
BIL 067 043/064 040/062 043/068 044/065 044/062 042/060
    0/B 00/U    00/B    01/B    11/B    11/B    11/B
LVM 066 039/063 034/063 041/066 042/063 041/059 040/060
    0/N 01/B    00/B    01/B    12/W    22/W    22/W
HDN 068 039/065 039/064 040/069 042/067 041/064 039/061
    0/B 00/U    00/B    01/B    11/B    01/B    11/B
MLS 065 039/064 038/061 040/065 042/065 043/061 038/058
    0/U 00/N    00/U    01/B    11/U    11/B    11/B
4BQ 067 038/070 038/064 040/070 042/068 042/063 038/061
    0/B 00/N    00/U    00/B    01/B    01/B    11/B
BHK 064 036/065 035/059 037/063 038/064 040/059 036/056
    0/N 00/N    00/U    00/B    00/B    11/B    11/B
SHR 068 033/068 033/063 040/070 039/066 038/063 037/062
    0/U 00/U    00/B    00/B    01/B    11/B    11/B





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