Pomeroy, Washington Weather Forecast Discussion

455
FXUS66 KOTX 070555
AFDOTX
Area Forecast Discussion
National Weather Service Spokane WA
1055 PM PDT Sat Sep 6 2025
.KEY MESSAGES...
- Unsettled weather returning to the region over the weekend and
  into next week with increasing threat for showers and
  thunderstorms.
- Gusty outflow winds to 40 mph possible near thunderstorms
  Saturday evening and night.
- Temperatures trending cooler heading into this weekend and
  next week.
- Smoke and haze expected to continue through the weekend
&&
.SYNOPSIS...
Smoke and haze is expected to continue over the weekend. The
threat for showers and thunderstorms will increase this evening
and into Sunday. Gusty outflow winds are possible near any
thunderstorms. Additional rain chances will arrive next week
with cooler temperatures.
&&
.DISCUSSION...
Tonight through Sunday: The Low is tracking off the coast of
southern Oregon and is pushing a shortwave through northern
Oregon. The wave will continue to move north through tonight.
It will begin to impact the Inland Northwest in the next couple
of hours. It will bring light showers and isolated
thunderstorms. Confidence is fairly low on which areas will be
impacted by the thunderstorms. One concern are the winds ahead
of the wave. Some models are showing winds sustained in the
teens with gusts near 30 to 35 MPH. While the shower chances
increase across the region, the amounts are not expected to be
much for the most of the lowland locations with a few hundredths
at most. It will hopefully bring better air quality as the rain
and wind mix out the smoke.
Monday through Friday: The Low will slowly move South of the
Inland Northwest through the period. It will continue to pump
moisture and bring widespread shower chances through the
Friday. Precip amounts range from a tenth or two for the
lowlands and a quarter to 3 quarters of an inch for the higher
terrains. Ensembles support isolated thunderstorm threat. With
this pattern, temperatures will moderate to season normals.
Highs will be in 70s and low 80s. Overnight lows will be in the
50s. /JDC
&&
.AVIATION...
06Z TAFS: Low-level smoke has improved across portions of
Eastern WA and the lower Idaho Panhandle as southwest winds
increased this evening. Locations like Spokane, Coeur D Alene,
Pullman, and Lewiston have achieved 6SM or greater. With steady
southerly winds overnight, there is low confidence for
conditions to deteriorate and is captured in the HRRR near
surface smoke model. The disturbance lifting northward is also
trending weaker with time and showers were removed from Spokane
Area overnight. In Central WA, there will be scattered showers
and embedded thunderstorms with the highest risk for lightning
over the Cascades. On Sunday, the threat for isolated
thunderstorms will over the Cascades and northern mountains with
a second area stretching from NE Oregon into the Central
Panhandle Mountains of Idaho. A few storms could be strong with
hail and gusty winds. Omak, Colville, and Bonner Ferry, and
Lewiston come with a 30% probability to impacted.
FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS:
There is low confidence if visibilities will drop again at
Spokane-Pullman which has experience improvement. There is
moderate confidence for some improvement at Moses Lake but lower
for Wenatchee given persistent NW winds which will transport
upstream smoke. As for thunderstorms Sunday afternoon,
confidence is moderate for storms to remain in the northern
mountains and in the vicinity of Lewiston. Pullman comes with a
10-20% chance and may need to be added if trends are further
north. /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:/weather.gov/otx/avndashboard
&&
.Preliminary Point Temps/PoPs...
Spokane        89  63  86  58  82  55 /   0  20  20  20  10  50
Coeur d`Alene  86  63  86  59  83  57 /   0  20  20  20  10  40
Pullman        90  58  82  53  81  52 /  10  20  30  30  10  60
Lewiston       94  67  89  63  87  61 /  10  30  40  30  10  50
Colville       87  53  86  49  82  47 /   0  20  40  40  30  40
Sandpoint      86  58  83  54  80  52 /   0  20  30  30  20  40
Kellogg        87  63  84  60  82  57 /   0  20  30  40  10  40
Moses Lake     94  60  87  56  82  55 /  20  40  40  10  10  50
Wenatchee      95  67  85  62  81  61 /  30  40  50  20  10  60
Omak           90  65  88  60  83  59 /  10  30  40  30  20  40
&&
.OTX WATCHES/WARNINGS/ADVISORIES...
WA...Air Quality Alert until noon PDT Monday for Central Chelan
     County-Lower Garfield and Asotin Counties-Moses Lake Area-
     Northeast Blue Mountains-Northeast Mountains-Okanogan
     Highlands-Okanogan Valley-Spokane Area-Upper Columbia
     Basin-Washington Palouse-Waterville Plateau-Wenatchee
     Area-Western Chelan County-Western Okanogan County.
     Red Flag Warning from 4 PM this afternoon to 3 AM PDT Sunday
     for East Washington Central Cascades (Zone 696)-Foothills
     of Central Washington Cascades (Zone 705)-Waterville
     Plateau (Zone 706)-Western Columbia Basin (Zone 707).
ID...Air Quality Alert until noon PDT Monday for Central Panhandle
     Mountains-Coeur d`Alene Area-Idaho Palouse-Lewis and
     Southern Nez Perce Counties-Lewiston Area-Northern
     Panhandle.
&&
$$

NWS OTX Office Area Forecast Discussion