Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 232030

Area Forecast Discussion
National Weather Service Missoula MT
230 PM MDT Sun Jul 23 2017

.DISCUSSION...We are still expecting the ridge of high pressure to
begin to break down overnight and tomorrow. A front will be
sliding south out of Alberta tomorrow morning, that will bring
north-northeasterly winds to those along the Continental Divide
around Glacier National Park. A light easterly breeze could
possibly make it as far west as Lincoln County. The bad news, no
precipitation is expected with this front. Elsewhere across
western Montana and north-central Idaho, an increase in west-
northwest winds will occur in the afternoon. Winds will be
stronger in western Montana and Lemhi county, where they could be
gusting up to 25-30 mph for a short period of time. This could
translate to another critical fire weather day.

No major changes where made to the forecast for Tuesday through
next week. The forecast continues to show a lesser extend of
showers and thunderstorms from past days Monday and Tuesday. Those
that do see any showers will be hit and miss, and confined to
southwest Montana and Lemhi County.

We still do see a chance for more showers and thunderstorms for
Wednesday. They could spread as far north as the I-90 Corridor in
western Montana, but the confidence in showers moving further
north is low. Also, the amount of moisture that will be associated
with these showers and thunderstorms, are not as great as
previously thought a few days ago.

The extended forecast continues to show hot and mostly dry
conditions through next weekend. There will be a slight chance for
afternoon and evening showers and thunderstorms Friday and
Saturday. Stay tuned to the forecast for further changes.


.AVIATION...Winds are expected to increase this afternoon
generally between 10-20 kts. These winds will decrease around
24/0300z, but a north and northeast pressure gradient will develop
overnight with the passage of a weak front, so easterly winds
will increase during the early morning in northwest Montana. Wild
fire smoke is again on the increase this afternoon so continued
hazy conditions and reductions to visibility in smoke will
continue. Monday will become breezy by with the passage of a dry



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