Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 250549
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
1049 PM PDT Sun Sep 24 2017

.SYNOPSIS...
Fall coolness and considerable cloudiness will be across the
Inland Northwest into Monday. Light showers or sprinkles will
possible with temperatures in the 60s. The weather will warm up
and dry out Tuesday through the end of the week. Look for
temperatures topping out in the upper 70s and lower 80s Thursday
and Friday. More seasonal and showery weather can be expected for
the upcoming weekend.

&&

.DISCUSSION...
Tonight through Tuesday: Northerly flow aloft will continue into
early next week as bands of moisture brush through the regions.
Each band is associated with a weak warm air front aloft and
leading to light showers or sprinkles from the mid level cloud
deck with its passage. One of features will graze along the
Canadian border late tonight and overnight, weakening as it moves
east. Could see some isolated mountain showers overnight, but not
much measureable precipitation. A second but strong warm front
will arrive Monday into Monday evening with a slightly better
chance of showers across the mountains and mere sprinkles across
the low lands. Overnight lows will moderate tonight, although the
increase in clouds and added moisture for Monday looks to limit
the warming at the surface. It`s not until Tuesday that less cloud
cover and the building ridge will yield to warming temperatures.
As temperatures stay below normal, winds will remain light through
the start of the new week. /rfox.

Tuesday night through Sunday: An upper ridge builds Wednesday and
Thursday. This will result in mostly clear skies and a warming
trend with 850mb temperatures warming to 13-15C Wednesday and 15-17C
Thursday. This should translate to valley highs climbing well into
the 70s with the warmest spots in the lower 80s. The ridge
flattens Friday through the weekend which should bring a gradual
cool down as west to northwest flow develops with mid level clouds
spilling into the area. Not much moisture showing up through this
period as the jet axis remains primarily north of the area into
British Columbia. Although there may be just enough moisture/lift
to squeeze out light showers at times over the Cascade crest,
northern mountains, and Idaho Panhandle. JW

&&

.AVIATION...
06Z TAFS: Mid level clouds with cigs above 7 kft agl will remain
over much of the region tonight and mainly east of a line from
KMWH to KOMK. A mid level frontal band is also moving onshore off
of the easter Pacific this evening. This feature will spread high
level clouds into the Cascades overnight. Cloud cover along the
incoming front will thicken through the day Monday. Precipitation
is not expect with this front, but virga showers will be possible
Monday afternoon and evening. /SVH

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        46  66  47  69  49  74 /  10  10  10   0   0   0
Coeur d`Alene  45  64  45  69  45  74 /  10  10  10  10   0   0
Pullman        43  65  46  69  45  73 /   0  10  10  10   0   0
Lewiston       48  69  50  73  50  76 /   0  10  10   0   0   0
Colville       45  69  44  74  45  78 /  10  20  10   0   0   0
Sandpoint      43  62  42  67  42  72 /  10  20  20  10   0   0
Kellogg        41  61  42  65  44  71 /  10  10  20  10   0   0
Moses Lake     47  72  47  76  48  79 /   0  10  10   0   0   0
Wenatchee      52  71  52  76  53  79 /  10  10  10   0   0   0
Omak           49  71  48  77  48  80 /  10  10  10   0   0   0

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...None.
WA...None.

&&

$$



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