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Lewiston, Idaho 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Lewiston ID
National Weather Service Forecast for: Lewiston ID
Issued by: National Weather Service Spokane, WA
Updated: 12:29 am PST Feb 7, 2025
 
Overnight

Overnight: Snow likely, mainly after 4am.  Cloudy, with a low around 29. Calm wind.  Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.
Snow Likely

Friday

Friday: Snow likely, mainly before 7am.  Cloudy, then gradually becoming mostly sunny, with a high near 34. Light and variable wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 22 mph.  Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Snow Likely

Friday
Night
Friday Night: A 20 percent chance of snow before 10pm.  Partly cloudy, with a low around 20. Light and variable wind.
Slight Chance
Snow then
Mostly Cloudy
Saturday

Saturday: A chance of snow showers after 10am, mixing with rain after 4pm.  Mostly cloudy, with a high near 36. Light south wind.  Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.
Chance Snow
Showers then
Chance
Rain/Snow
Saturday
Night
Saturday Night: A chance of rain and snow showers before 7pm, then a chance of snow showers.  Mostly cloudy, with a low around 27. Calm wind.  Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Chance
Rain/Snow
then Chance
Snow Showers
Sunday

Sunday: A 30 percent chance of snow, mainly before 4pm.  Mostly cloudy, with a high near 37. Little or no snow accumulation expected.
Chance Snow

Sunday
Night
Sunday Night: A 20 percent chance of snow before 10pm.  Mostly cloudy, with a low around 21.
Slight Chance
Snow then
Mostly Cloudy
Monday

Monday: Mostly cloudy, with a high near 32.
Mostly Cloudy

Monday
Night
Monday Night: Partly cloudy, with a low around 12.
Partly Cloudy

Lo 29 °F Hi 34 °F Lo 20 °F Hi 36 °F Lo 27 °F Hi 37 °F Lo 21 °F Hi 32 °F Lo 12 °F

 

Overnight
 
Snow likely, mainly after 4am. Cloudy, with a low around 29. Calm wind. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.
Friday
 
Snow likely, mainly before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 34. Light and variable wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday Night
 
A 20 percent chance of snow before 10pm. Partly cloudy, with a low around 20. Light and variable wind.
Saturday
 
A chance of snow showers after 10am, mixing with rain after 4pm. Mostly cloudy, with a high near 36. Light south wind. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.
Saturday Night
 
A chance of rain and snow showers before 7pm, then a chance of snow showers. Mostly cloudy, with a low around 27. Calm wind. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Sunday
 
A 30 percent chance of snow, mainly before 4pm. Mostly cloudy, with a high near 37. Little or no snow accumulation expected.
Sunday Night
 
A 20 percent chance of snow before 10pm. Mostly cloudy, with a low around 21.
Monday
 
Mostly cloudy, with a high near 32.
Monday Night
 
Partly cloudy, with a low around 12.
Tuesday
 
Mostly sunny, with a high near 26.
Tuesday Night
 
Partly cloudy, with a low around 7.
Wednesday
 
Partly sunny, with a high near 26.
Wednesday Night
 
A 20 percent chance of snow. Mostly cloudy, with a low around 13.
Thursday
 
A chance of rain and snow. Partly sunny, with a high near 31. Chance of precipitation is 50%.

 

Forecast from NOAA-NWS for Lewiston ID.

Weather Forecast Discussion
601
FXUS66 KOTX 070532
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
932 PM PST Thu Feb 6 2025

.SYNOPSIS...
Next round of light snow moves into extreme southeast WA and the
southern ID Panhandle early Friday morning. More widespread snow
showers are forecast for Saturday. Temperatures will remain below
average through the weekend into next week. Widespread single
digits to low teens will be possible around the middle part of
next week.

&&

.DISCUSSION...
Evening update: Forecast is generally on track for tonight into
Friday although made a few updates to the forecast. One update was
to increase the winds overnight into early Friday down the
Okanogan Valley, through the Purcell Trench in north Idaho, and
across the Upper Columbia Basin. A surface low tracking towards
Boise, ID overnight will strengthen the northerly pressure
gradient with winds increasing to 15-25 MPH with gusts up to 35
MPH. Localized drifting snow is possible for areas with stronger
gusts. The winds down the Okangoan Valley into the Moses Lake area
will also keep low temperatures up a little higher than
previously forecast, with some upward adjustments. But don`t let
that fool you as the wind creates cold wind chills in the single
digits for much of the region overnight. The northeast winds
across NE WA/N Idaho has already eroded most of the stratus this
evening, while stratus remains banked up along the East Slopes of
the Cascades. So far this is holding the "heat" in with Winthrop a
balmy 18F compared to the frigid -3F reading from 8 PM yesterday.
Eventually the stratus is expected to clear overnight as the drier
air erodes the stratus, but there is higher uncertainty with the
precise lows for the Methow Valley which will depend on when the
stratus clears. Kept the forecast untouched for Winthrop with -5F
forecast given satellite trends show continued erosing of stratus
occurring over northern WA.

The snow forecast remains unchanged as light snow slowly moves
north across the Blue Mountains, Camas Prairie, and LC valley
overnight.  JW

&&

.AVIATION...
06Z TAFS: A weather system passing south of the area into Oregon
and Central ID will result in snow staying mainly south of the
area, except for a 60% chance of light snow moving up into KLWS
13z-18z Friday, and a 40% chance for KPUW. The weather system is
inducing a tight north-northeast pressure gradient which has
helped to clear out the stratus over most of the region, except
near the Cascades where a marginal MVFR deck lingers over
Winthrop and Wenatchee as of 05z. But even this is expected to
clear as the stratus continues to erode. Thus for most of the area
VFR conditions are forecast through the TAF period with gusty
northeast winds expected for KCOE/KSZT overnight into Friday
morning with gusts of 20-25 kts. The exception to the VFR
conditions is KPUW/KLWS where shifting boundary layer winds to
west-northwest Friday morning combined with light snow may lead
to MVFR conditions, with the best chances at KLWS. JW

FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: High confidence in
VFR conditions for KGEG/KSFF/KCOE/KMWH through the TAF period.
There is moderate confidence that KEAT will remain VFR. For
KLWS there is moderate confidence in CIGS dropping to MVFR after
light snow develops after 12z Friday. The HREF suggests around a
30% chance that KPUW will drop to MVFR after 12z Friday. JW


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

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

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        16  29  17  30  14  28 /   0  10  10  50  20  10
Coeur d`Alene  17  29  17  30  17  29 /   0  20  10  60  30  20
Pullman        22  26  15  29  22  28 /  20  40  20  70  60  40
Lewiston       27  33  19  35  25  34 /  40  60  20  20  40  30
Colville        8  29  10  29   6  28 /   0   0   0  20  10   0
Sandpoint      16  27  15  28  17  28 /   0  10  10  40  20  20
Kellogg        19  26  15  29  20  28 /  10  40  20  60  50  40
Moses Lake     20  33  20  33  16  32 /  10  10   0  10   0   0
Wenatchee      18  30  17  31  15  29 /   0   0   0  10   0   0
Omak           15  28  12  28  11  29 /   0   0   0  10   0   0

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...Winter Weather Advisory from 2 AM to 3 PM PST Friday for Lewis
     and Southern Nez Perce Counties.

WA...None.
&&

$$
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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