Lewiston, Idaho 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

225
FXUS66 KOTX 021821
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
1021 AM PST Mon Feb 2 2026

.KEY MESSAGES...

- Periods of light precipitation today, with temperatures
  trending warmer.

- Dry and mild Tuesday through Friday.

&&

.SYNOPSIS...
A milder pattern with periods of light precipitation is
expected through Monday. Snow will be limited to the mountains
and accumulations will be very light with little to no impacts
expected for mountain passes. The forecast then trends drier
again on Tuesday. Temperatures will remain mild and above
normal.

&&

.DISCUSSION...
Today and tonight: A weak shortwave system moves by the area.
This morning low level moisture under a low level inversion will
hold stratus and fog in place. The depth of the fog has been
vacillating, with it locally dense at times before it dissipates
some. As we continue through this morning I expect to fog will
be more persistent, with the highest confidence over the deeper
Columbia Basin into the West Plains. The incoming wave will
bring mountain rain/snow mix and lowland rain in from the west
later this morning, with the threat expanding throughout the
region this afternoon before waning through evening. The wave is
relatively weak and precipitation amounts away from the
Cascades looks light. A couple inches of snow are possible near
Stevens Pass, maybe one inch near Sherman and lighter amounts
elsewhere. Some more moderate rain amounts are possible near
the Cascades crest otherwise, while lowlands generally see a
trace to about 0.05 inches. Heading into tonight, stratus will
continue, with more fog expanding out again,

Tuesday to Saturday: ensembles remain in good agreement with a
ridge building over this period. This will largely mean dry
weather, but we will have to contend with low clouds and maybe
some patchy fog. After Tuesday the mountains and southeast CWA
will have the best chance of seeing some sun during the day. but
the remainder of the CWA will be struggling each day. There is
the potential in the afternoon and evening for its erosion and
it may eroded to a bigger extend later in the week.

Saturday night to Sunday: the frontal wave moves in, This will
expand the chance for rain and high mountains snow into the
region through Sunday, with some cooler air lowering snow levels
toward Sunday night into next Monday and potentially mixing some
down the lowlands at night.

Temperatures will largely be in the upper 30s and 40s today and
much of the area Tuesday, with some 50s coming into the
southeast CWA. Thereafter confidence wanes some. If stratus
holds on temperatures would be colder than currently forecast.
Yesterday (Sunday) the 25th percentile temperature verified in
many spots. That is the colder end of solutions. However heading
into the week even the 25th percentile values warm, but theN
NBM may not be handling the stratus well. Either way the
forecast has more 40s and lower 50s. Lows in the upper 20s and
30s will be common, with some low 50s near the L-C Valley.
/Solveig

&&

.AVIATION...
18Z TAFS: Weak system increasing mid level clouds and bringing
light rain to the region. Warmer temperatures are improving the
fog and stratus over the EAT. MVFR condtions are expected by
early afternoon. VFR condtions expected for the
GEG/SFF/COE/PUW/LWS/MWH. Models do have a low probability of
MVFR ceilings through late morning. Ceilings and visibility are
expected to degrade again overnight into Tuesday morning. The
boundary layer is expected to remain saturated and cooler temps
are leading to another round of IFR vis/cig for EAT. IFR cig is
expected for GEG/SFF/COE/MWH.

FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: Low confidence
for IFR cigs for terminals for the rest of Monday. Moderate
confidence for IFR condtions for Tuesday morning.

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

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        42  33  47  33  49  32 /  40  20   0   0   0   0
Coeur d`Alene  43  36  48  34  50  33 /  50  30   0   0   0   0
Pullman        44  37  53  36  52  35 /  40  20   0   0   0   0
Lewiston       48  39  56  38  55  36 /  30  10   0   0   0   0
Colville       39  32  43  33  47  32 /  60  20   0   0   0   0
Sandpoint      39  34  43  34  46  33 /  50  40   0   0   0   0
Kellogg        42  39  47  37  52  37 /  40  40   0   0   0   0
Moses Lake     43  33  50  33  50  32 /  30   0   0   0   0   0
Wenatchee      41  35  44  36  47  35 /  60  10   0   0   0   0
Omak           40  34  44  36  44  34 /  40  10   0   0   0   0

&&

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

&&

$$