Peshastin, Washington Weather Forecast Discussion

487
FXUS66 KOTX 161830
AFDOTX
Area Forecast Discussion
National Weather Service Spokane WA
1130 AM PDT Tue Sep 16 2025
.KEY MESSAGES...
- Breezy easterly winds tonight into Tuesday across the
  Cascades.
- Warm and dry Tuesday through the end of the week.
&&
.SYNOPSIS...
Winds will be breezy from the east on Tuesday. High pressure
over the region with a warm and dry conditions through the work
week. Unsettled weather returns this weekend.
&&
.DISCUSSION...
Tuesday through Thursday: An upper-level ridge building over the
Pacific Northwest has brought clear skies to the Inland Northwest.
Following Sunday and Mondays rain, lingering boundary layer
moisture and light winds have allowed fog and low stratus to develop
in the valleys of northeast Washington and north Idaho, which is
evident on nighttime microphysics imagery. Temperatures trend warmer
for today (Tuesday) especially in eastern Washington and north
Idaho where widespread cloud cover kept highs in the upper 50s
to low 60s on Monday. Highs today will run about 5F warmer in
central Washington and up to 20F warmer in eastern Washington
and north Idaho. Initially the center of the upper-level ridge
will be west of the Cascades with a thermally-induced surface
trough and offshore (easterly) flow across the PNW. By Wednesday
the ridge shifts east of the Cascades as a weakening front and
upper- level trough brush western Washington. This feature will
struggle to move inland but will amplify the ridge downstream.
Highs will warm into the 80s to low 90s Wednesday and remain
consistent through the end of the workweek.
Friday through Monday: Models and ensembles agree that another
trough and cold front will move into the Pacific Northwest this
weekend, though timing and strength remain uncertain. Current
guidance suggests this front will be stronger than recent ones,
bringing increasing chances for precipitation and gusty winds. The
best precipitation chances remain in the mountains (15-30%) with
less than 10% in the lowlands. The NBM shows a 20-30% chance of wind
gusts over 40 mph from the lee of the Cascades into the Columbia
Basin, West Plains, and Palouse on Saturday, increasing to 40-60% on
Sunday. This will be a period to monitor closely. /vmt
&&
.AVIATION...
18Z TAFS: General winds will remain out of the east to
northeast through the day with clear skies.
FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: High confidence
in VFR conditions through the TAF period.
-----------------------
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:/weather.gov/otx/avndashboard
&&
.Preliminary Point Temps/PoPs...
Spokane        81  54  88  54  87  56 /   0   0   0   0   0   0
Coeur d`Alene  81  55  86  55  89  56 /   0   0   0   0   0   0
Pullman        78  51  85  50  86  51 /   0   0   0   0   0   0
Lewiston       83  57  88  59  89  60 /   0   0   0   0   0   0
Colville       81  44  87  44  87  46 /   0   0   0   0   0   0
Sandpoint      79  50  85  49  84  51 /   0   0   0   0   0   0
Kellogg        80  56  86  57  86  59 /   0   0   0   0   0   0
Moses Lake     83  52  88  52  87  54 /   0   0   0   0   0   0
Wenatchee      81  59  87  60  86  61 /   0   0   0   0   0   0
Omak           83  55  88  57  88  59 /   0   0   0   0   0   0
&&
.OTX WATCHES/WARNINGS/ADVISORIES...
WA...None.
ID...None.
&&
$$

NWS OTX Office Area Forecast Discussion