Area Forecast Discussion
Issued by NWS Great Falls, MT

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FXUS65 KTFX 151728
AFDTFX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
1125 AM MDT Mon Sep 15 2014

Updated Aviation

.DISCUSSION...
Today through Wednesday...Quiet weather continues for the next few
days. High pressure continues to build over the region today,
bringing warmer and dry conditions for the start of the week.
Temperatures will reach the 70s today with 80s expected Tuesday
and Wednesday. A low pressure system off the California coast will
push some moisture and instability into the region Wednesday
afternoon and evening, possibly generating some isolated
thunderstorms over Southwest Montana and the Continental Divide.

Wednesday night through Monday...An upper level low pressure trof
will move over the West Coast early Thursday and into the Pacific
Northwest by afternoon. This will begin to knock down the high
pressure ridge over Central Montana and bring moist, unsettled,
southwest flow aloft over the zones. The increase in moisture and
lowering of heights aloft will bring instability to the region,
especially over the southwest zones. A chance of showers or
thunderstorms will be greatest in this area. The trof will move
across Central Montana Friday, the air mass will cool and, with the
passage of the trof, a chance of showers will continue. With the
trof moving east, high pressure will build aloft again Saturday.
This ridge will continue to build through Sunday. A shortwave will
move into the ridge Monday but the air mass will remain quite dry
precipitation isn`t expected. Temperatures will remain well above
normals through the period. Zelzer

&&

.AVIATION...
UPDATED 1728Z.
Mainly dry and VFR conditions along with light winds will prevail
over the next 24 hours as a ridge of high pressure builds over the
region.

&&

.PRELIMINARY POINT TEMPS/POPS...
GTF  75  46  83  51 /   0   0   0   0
CTB  73  40  80  46 /   0   0   0   0
HLN  80  48  86  53 /   0   0   0   0
BZN  77  43  82  47 /   0   0   0   0
WEY  72  33  73  35 /   0   0   0   0
DLN  79  46  83  49 /   0   0   0   0
HVR  74  43  81  47 /   0   0   0   0
LWT  73  46  81  51 /   0   0   0   0

&&

.TFX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

$$

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