Area Forecast Discussion
Issued by NWS Boise, ID

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FXUS65 KBOI 260248

Area Forecast Discussion
National Weather Service Boise ID
848 PM MDT Mon Sep 25 2017

.DISCUSSION...No change from previous thinking. Clouds continue to
move southeast into the area, with very light returns showing up
on radar over the higher terrain of Baker County, northern Harney
and Malheur Counties, and the West-Central Mountains. It is
unlikely that any of this is reaching the ground below around 7000
feet. The weak system bringing these clouds and radar echoes will
move through overnight and early Tue, leading to clearing by
tomorrow afternoon and slight warming compared to today. No
changes are planned to the forecast at this time.


.AVIATION...VFR. Mid-upper level cloud cover overnight with
clearing skies Tuesday. Surface winds light and variable. Winds
aloft to 10k feet MSL, north-northeast 10-15 kts.


SHORT TERM...Warm-frontal clouds will continue over northern
areas tonight with isolated rain and snow showers over northern-
most mountains. Clouds will decrease Tuesday. Southern areas will
stay mostly clear. Slightly warmer Tuesday and again Wednesday as
upper level high pressure gradually builds over the interior
northwest. Light winds through Wednesday.

LONG TERM...Wednesday night through Monday...The upper level ridge
will continue to slide into the region for increasing temperatures
and clear and dry conditions. Thursday will be near normal, and
Friday a few degrees above normal. Friday looks to be the warmest
day of the period as the ridge-axis moves east of the region and a
southerly flow kicks in. Beginning Friday night through Saturday, an
upper level trough will sweep across the region, bringing showers to
the mountains, generally north of a Burns-to-Fairfield line.
Temperatures are expected to drop 3-7 degrees behind the trough`s
associated cold front. Beyond Saturday, there is little model
agreement; however, conditions look favorable for cool and unsettled





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