Hayden, Idaho 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

784
FXUS66 KOTX 132204
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
204 PM PST Tue Jan 13 2026

.KEY MESSAGES...

- Dry and stagnant pattern under strong ridge of high pressure
  by mid week into the weekend.

&&

.SYNOPSIS...
Strong high pressure will remain in place through the upcoming
weekend. Low clouds and fog is expected to expand into some of
the valleys Tuesday night into Wednesday, then become
established across much of the Inland Northwest by Thursday.

&&

.DISCUSSION...
Today through next Tuesday: High pressure will dominate the period
leading to stagnant conditions in the Inland Northwest. Strong
inversions will be efficient at trapping pollutants near the ground,
potentially leading to degraded air quality. These inversions are
leading to quite warm temperatures in the mountains today (40s and
50s above 4000`). A weak shortwave and cold front passage Wednesday
evening will usher in drier air and temporarily disrupt stagnant
conditions (especially the Okanogan Valley) as northerly transport
winds increase above 10 mph. A few sprinkles may come out of the
sky with areas covered in stratus, otherwise this passage will be
mostly dry. The ridge center will stay offshore through at least
Sunday, leading to continuing dry and stagnant conditions. Ensembles
signal the return of unsettled conditions around Tuesday with 75%
showing weak troughing off the WA coast. DB

&&

.AVIATION...
18Z TAFs: Thick mid and high clouds streaming over the region
this morning have allowed for VFR skies for much of the Basin,
Palouse, and L-C Valley. Fog is limited to the Cascade valley
while areas of MVFR stratus impact terminals across far North
Idaho between COE, SZT, 65S, CQV, DEW. High clouds thin this
evening into the overnight with light boundary layer winds. This
will favor an increase in fog across the northern valleys (where
stratus is not established at sundown) down into the
Spokane/Coeur d`Alene area, Cascade valleys, and possibly the
Moses Lake area. There is moderate confidence for VFR skies to
remain PUW-LWS due to a persistent east/southeast, drier wind.

FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS:
High confidence that fog and stratus today will be patchy and
limited to mainly the Cascade valleys with some marginal MVFR
conditions in the northern valleys and ID Panhandle. There is
also high confidence that Tuesday Night the thinning of high
clouds, light winds, and strengthening inversions will allow for
an increase in IFR/LIFR fog and stratus. But confidence is only
low to moderate on timing and coverage of when conditions
deteriorate at KGEG/KSFF/KCOE/KEAT/KMWH. SB

-----------------------

Confidence descriptors:
Low - Less than a 30 percent chance
Moderate - 30 to 70 percent chance
High - Greater than a 70 percent chance

For additional probabilistic information for NWS Spokane
airports,please refer to the Aviation Dashboard on our
webpage: https:/www.weather.gov/otx/avndashboard

&&

.Preliminary Point Temps/PoPs...
Spokane        30  36  28  34  26  40 /   0   0   0   0   0   0
Coeur d`Alene  31  40  28  36  27  41 /   0   0   0   0   0   0
Pullman        34  46  30  43  28  42 /   0   0   0   0   0   0
Lewiston       34  48  32  37  31  43 /   0   0   0   0   0   0
Colville       32  37  28  36  25  42 /   0   0   0   0   0   0
Sandpoint      33  38  29  35  27  38 /   0   0   0   0   0   0
Kellogg        35  46  30  41  28  42 /   0   0   0   0   0   0
Moses Lake     30  37  29  38  27  42 /   0   0   0   0   0   0
Wenatchee      37  38  34  39  32  44 /   0   0   0   0   0   0
Omak           34  37  31  38  28  41 /   0   0   0   0   0   0

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
WA...Air Stagnation Advisory until 10 AM PST Friday for Central
     Chelan County-Northeast Mountains-Okanogan Highlands-
     Okanogan Valley-Wenatchee Area-Western Chelan County-
     Western Okanogan County.
ID...Air Stagnation Advisory until 10 AM PST Friday for Central
     Panhandle Mountains-Lewis and Southern Nez Perce Counties-
     Lewiston Area-Northern Panhandle.

&&

$$