Wildfire in Idaho, September 1 to 30, 2021

Area Forecast Discussion
National Weather Service Spokane WA
952 PM PDT Tue Aug 31 2021

.SYNOPSIS...
This evening will be generally breezy with locally windy
conditions from the Cascade east slopes, Waterville Plateau and
west Central Basin until about midnight. Wednesday morning will
be quite cool with much of the Inland Northwest experiencing
temperatures in the mid 30s to mid 40s with some patchy frost
possible. Warmer weather will return Friday and persist into
Saturday and Sunday with highs in the 70s to low 80s.

&&

.DISCUSSION...
Tuesday night into Wednesday: A frost advisory was issued for
areas in eastern Washington and north Idaho that have the best
chances for low temperatures near 32 to around 37 degrees. It will
all depend on afternoon and evening convective clouds clearing
overnight and winds becoming light. It will take some time for
these conditions to be met and local valley fog formation may
inhibit frost but for those higher terrain valleys and cold spots
it's a good bet they will get close to that frost point toward
early Wednesday morning. Cold pockets south of Spokane, WA toward
Rosalia and Colfax are also in this advisory. Thursday morning may
be another morning for the cold spots to look out for patchy
frost.

Winds tonight will be strongest up to 20 mph sustained across the
Cascade east slopes, Waterville Plateau and west Central Basin
until about midnight.

Something else added to this evening are some showers across the
northern mountains of east WA including the north Cascades. Near
the Cascade crest the snow level looks to be around 6000 feet
this evening so some of the showers could bring a light dusting of
snow in the higher elevations.

Thursday looks to be a calmer, warmer and dry day as the lingering
low pressure system slowly gets pushed off to the east.
Temperatures nearing seasonal normals (70s to near 80) are
expected with a few clouds over the mountains. TC

Thursday and Friday: The trough will be on it's way out as a
shortwave ridge sets up for the end of the week. Temperatures
will still be on the rise with afternoon highs in the mid-70s to
low 80s to wrap up the week. On Thursday, there will be another
morning with cooler temperatures and a chance for frost in the
sheltered northern and Panhandle valleys.

Saturday through Monday: Our next opportunity for any active
weather is likely this weekend, but for a small area in the
region. An incoming low in British Columbia will bring light
showers to the Cascades Saturday through early Sunday. There is a
slight chance that some of the troughing will bring some light
rain to portions of far northern WA. With the cold frontal
passage, there will be breezy winds on Saturday afternoon and
Sunday afternoon. Models are showing gusts up to 20-30 mph in
areas such as the eastern Cascades through the Basin, Palouse and
Spokane. Still uncertainty, but Sunday will be a day to keep an
eye on. An increase in clouds will occur through the weekend and
clear out as a ridge sets up off the coast early next week.
Temperatures peak in the 80s on Saturday and will not cool much in
the following days. JS

&&

.AVIATION...
06Z TAFS: Widely scattered and generally light showers will
continue across portions of northern WA and ID into the early
overnight hours. Some smoke will drift over eastern Washington
and the Idaho Panhandle, but significant visibility restrictions
are not expected at area TAF sites. Skies will clear towards
sunrise, with mostly clear skies anticipated Wednesday. /KD

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        42  71  45  75  47  79 /   0   0   0   0   0   0
Coeur d'Alene  42  70  45  75  48  79 /   0   0   0   0   0   0
Pullman        37  69  40  73  42  77 /   0   0   0   0   0   0
Lewiston       49  76  50  80  53  84 /   0   0   0   0   0   0
Colville       37  71  38  75  46  79 /  30   0   0   0   0   0
Sandpoint      39  67  41  72  45  74 /  10   0   0   0   0   0
Kellogg        43  68  46  73  46  76 /   0   0   0   0   0   0
Moses Lake     41  74  46  79  47  82 /   0   0   0   0   0   0
Wenatchee      49  75  53  79  56  82 /   0   0   0   0   0   0
Omak           46  76  49  80  50  84 /  10   0   0   0   0   0

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...Frost Advisory from 2 AM to 9 AM PDT Wednesday for Central
     Panhandle Mountains-Coeur d'Alene Area-Idaho Palouse-
     Northern Panhandle.

WA...Frost Advisory from 2 AM to 9 AM PDT Wednesday for Northeast
     Mountains-Okanogan Highlands-Spokane Area-Washington
     Palouse.

&&

Hazardous Weather Outlook
National Weather Service Spokane WA
439 AM PDT Tue Aug 31 2021

IDZ001>004-026-027-WAZ031>038-041>044-011400-
Northern Panhandle-Coeur d'Alene Area-Idaho Palouse-
Central Panhandle Mountains-Lewiston Area-
Lewis and Southern Nez Perce Counties-Northeast Blue Mountains-
Lower Garfield and Asotin Counties-Washington Palouse-
Moses Lake Area-Upper Columbia Basin-Spokane Area-
Northeast Mountains-Okanogan Highlands-Wenatchee Area-
East Slopes Northern Cascades-Okanogan Valley-Waterville Plateau-
439 AM PDT Tue Aug 31 2021

This Hazardous Weather Outlook is for portions of North Idaho...
North Central Idaho...Central Washington...East Central
Washington...North Central Washington...Northeast Washington and
Southeast Washington.

.DAY ONE...TODAY AND TONIGHT

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

No hazardous weather is expected at this time.