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Area forecast discussion 
National Weather Service Great Falls Montana
544 am MDT Tuesday may 26 2015

..update to aviation...

Discussion...

Today through Thursday...an upper level closed low currently over
Washington state will linger over the Pacific northwest and Great
Basin through the short term period. The low will move very
slowly to the southeast and should reach southeast Idaho Thursday
afternoon. This systems proximity to western and central Montana
will result in cloudy skies with scattered to numerous showers
and a chance of thunderstorms each day. Temperatures remain near
seasonal averages and winds will be light. Precipitation totals
during the short term period are expected to range from one half
inch to about an inch across the region. At this time, flooding
does not appear to be a threat but rivers and small streams will
continue to be monitored. Mpj

Thursday night through Tuesday...weak ridging aloft
over the Pacific northwest Thursday night will finally displace
the remnant open wave departing into the High Plains. Fair and
warmer weather ensues for the weekend...but with adequate
instability to support isolated to scattered afternoon showers and
a few thunderstorms. The passage of a weak Pacific front is
indicated Saturday afternoon/evening with a passing shortwave
through western Canada. Both the GFS and European model (ecmwf) bring the next wave
across Oregon on Monday night. Have thus trended probability of precipitation up with
cooler temperatures to start next week. Nutter

&&

Aviation...
updated 1144z.

Upper level low will linger over the Pacific northwest through early
Wednesday morning. Widespread cloud cover with scattered to numerous
showers will prevail with mountain obscurations expected through the
forecast period. Scattered thunderstorms possible from around 20z
through 04z. VFR conditions will prevail with areas MVFR in
precipitation and low clouds. Mpj

&&

Preliminary point temps/pops...
gtf 66 48 68 48 / 70 40 50 40
ctb 64 44 69 45 / 70 40 60 40
hln 71 50 68 48 / 50 40 60 40
bzn 67 44 65 44 / 60 50 50 50
wey 57 36 58 35 / 50 50 50 50
dln 65 42 63 44 / 60 50 60 50
hvr 74 47 75 46 / 50 30 50 40
lwt 65 45 67 46 / 60 40 70 40

&&

Tfx watches/warnings/advisories...
none.
&&

$$

Weather.Gov/greatfalls

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