Area Forecast Discussion
Issued by NWS Billings, MT

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FXUS65 KBYZ 180956

Area Forecast Discussion
National Weather Service Billings MT
356 AM MDT Fri Aug 18 2017

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

Fairly quiet weather pattern in store for the next couple of
days. High pressure ridging will build back once again across the
forecast area today. This will result in rising heights and
afternoon highs a few degrees warmer than yesterday with readings
in the upper 80s to lower 90s. A few clouds will be around but
overall a mostly sunny day can be expected.

The ridge breaks down once again on Saturday as another Pacific
front moves across the forecast area during the morning. The front
will cause winds to become northwest from late morning through
the afternoon. Models show the winds looking to be the gustiest
during the morning hours when humidities are highest, then as
humidities drop into the teens during the afternoon, the winds
begin to decrease. However, 700mb winds look to be in the 15 to 25
mph range but not perfectly linked to 850mb winds so the amount
of mixing is a bit uncertain at this time. The main area of
possible impact looks to be from northern Rosebud County east to
Fallon County. However, we will hold off on a Fire Weather Watch
for these areas for now and see how the next model runs handle the
winds. Hooley

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

No significant weather is expected through the first half of next
week. Zonal flow will prevail through Monday with a series of
weak short waves which may produce some thunderstorms toward the
SE corner of Montana as it interacts with a little better low
level moisture and some low level convergence. A ridge is progged
to build over the region Tuesday into Wednesday with limited if
any chance of precipitation. A strong upper trough is then
expected to work toward the Rockies Thursday into Friday.
Increasing SW flow aloft should lead to tapping monsoonal moisture
and lead to an increasing chance of convection in our western
zones, especially over the mountains. Some of this may spill out
into the lower elevations/plains each evening. At this time, a
return to a zonal dry flow is expected for Saturday and Sunday.

Eclipse viewing... A short wave on Monday may bring some cloud
cover over the region. We will keep an eye on this through the
weekend for any eclipse viewing impacts. BT



No significant hazards to aviation are expected through today. BT



    Tdy Sat     Sun     Mon     Tue     Wed     Thu
BIL 091 059/088 059/085 059/084 057/088 059/089 060/086
    0/U 00/U    10/U    00/B    00/U    00/U    02/T
LVM 090 051/088 048/087 050/085 047/090 050/089 051/087
    0/U 00/U    10/U    01/B    00/U    00/U    23/T
HDN 093 056/090 057/088 056/086 053/090 056/090 057/088
    0/U 00/U    10/U    01/B    00/U    00/U    02/T
MLS 092 060/090 060/090 060/086 057/089 061/091 062/089
    0/U 00/U    21/B    01/B    00/U    00/U    02/T
4BQ 091 057/091 058/091 058/086 055/089 059/090 059/088
    0/U 00/U    21/U    12/T    10/U    00/U    02/T
BHK 088 057/090 055/085 055/083 053/086 055/088 057/086
    0/U 00/U    22/T    22/T    10/U    00/U    02/T
SHR 089 054/088 052/088 052/085 051/087 053/088 053/086
    0/U 00/U    00/U    01/U    10/U    00/U    02/T


MT...Red Flag Warning in effect from noon today to 6 AM MDT
      Saturday FOR ZONE 117.


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