Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 202012

Area Forecast Discussion
National Weather Service Missoula MT
212 PM MDT MON APR 20 2015

.DISCUSSION...Pleasant springtime conditions will persist through
Tuesday as high pressure remains in dominant control across the
region. Tuesday afternoon is likely to be the warmest day of the
week with perhaps a few weak showers or thunderstorms forming over
the mountains of SW Montana and along the Continental Divide.

Model continue their trend towards a stronger, perhaps colder
weather system cutting off from the main jet stream over NW
Washington Wednesday morning and swing it slowly towards NW
Montana by Wednesday night or early Thursday morning. The lack of
upper level jet support should ultimately support slower movement
of this system. So have increased chances for precipitation
Wednesday while slowly decreasing precipitation chances Wednesday
night. The apparent temperature difference with this approaching
system will help produce some gusty afternoon winds, especially
across NW Montana and should help kick off a few thunderstorms
both Wednesday and Thursday afternoon.

The general model trend still supports near normal temperatures
this weekend with increasing potential for precipitation Saturday
and especially Sunday. It could also be particularly gusty during
the afternoon hours.


.AVIATION...High pressure continues, making for pleasant flying
conditions today. A diurnal wind after 20/2100Z is likely at all
terminals, lasting through roughly 21/0200Z.



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