Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 311005

Area Forecast Discussion
National Weather Service Missoula MT
405 AM MDT Thu Jul 31 2014



High pressure will remain in-place over the Northern Rockies
through the weekend. Moisture from the Desert Southwest will
continue to be drawn northward during this time, with afternoon
and evening thunderstorm activity each day. The most noteworthy
surge of moisture in the current monsoon episode will arrive
Friday: the remnants of a previous tropical system. Some
impressive rainfall and minor flooding is possible from
thunderstorms that develop on Friday afternoon, with southwest
Montana and along the Continental Divide to be the areas of most
concern. Aside from rain-cooled locations, temperatures will
remain among the warmest of the summer thus far. Many low
elevation locations are anticipated to warm well into the 90s and
low 100s each afternoon through Saturday. Overnight temperatures
will also continue to remain warm, particularly on higher terrain.

All indications are that the high pressure will weaken early next
week, with relatively dry and continued warm conditions present
throughout the region. However, another monsoon-like high pressure
pattern is expected to re-emerge over the western U.S. by the
middle of next week, reintroducing daily thunderstorms and keeping
the warm temperatures in-place.


.AVIATION...High pressure will remain over the Northern Rockies
during the next 24 hours. Monsoon moisture will continue to be
present during this time, with thunderstorms developing over
terrain surrounding KSMN and KBTM from 31/1800Z through 01/0200Z.
Some erratic wind gusts are possible in the presence of any
shower/thunderstorm development. Otherwise, modest afternoon
breezes will be present at area airfields. Occasional terrain
obscurations due to shower/thunderstorms will be present over
southwest Montana and north central Idaho during this time as





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