Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 131726
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
1026 AM PDT Thu Aug 13 2020

.SYNOPSIS...
High temperature in the 70s and low 80s today will trend warmer
the next several days. By Sunday the Inland Northwest is expected
to have temperatures well into the 90s with portions of central
Washington exceeding 100 degrees. The heat will likely persist
Monday and Tuesday before temperatures cool a bit toward the
middle of next week.

&&

.DISCUSSION...

...SUNDAY, MONDAY, AND TUESDAY WILL BE HOT WITH MID 90S TO 100
LIKELY...

Today: Temperatures will rebound a bit this afternoon but remain
about 8 to 10 degrees below average. Much of north Idaho and the
eastern third of Washington will be in the mid 70s while places
like Lewiston, Moses Lake, Wenatchee, and Moses Lake top out in
the low 80s. Bands of mid and high level clouds are expected to
accompany the passage of a shortwave this morning into early this
afternoon. Places like Colville, Bonners Ferry, Sandpoint, Coeur
d`Alene and Kellogg can expect several hours of mostly cloudy
skies today. The models forecast clearing skies late in the day
and into the evening. Folks looking to view meteors tonight should
have clear skies.

Friday and Saturday: Our cool upper level trough will push into
the Dakotas by Friday. Widespread 80s will return on Friday under
mostly sunny skies and light winds. The Four Corners high pressure
ridge will amplify Saturday leading to continued warming. Low to
mid 90s will be common in central Washington, the Columbia Basin
and the L-C Valley with upper 80s in the valleys of the northern
and central Panhandle as well as the Palouse and Spokane metro
area. Temperatures will only go up as we head into early next
week. /GKoch

Sunday through Wednesday: When looking at previous runs, the ridge
is starting to hold on longer preventing the incoming low and cooler
weather. The ridge, held up by the high pressure sitting over the
southwestern US, is keeping the Inland Northwest hot and dry into
next week. However, moving into early next week, there is little
model agreement about a possible weak shortwave followed by the
progression of a large upper level low building in the Gulf of
Alaska. Some models are showing the chance for light rain pushing
from the southwest late Sunday - Monday into parts of the Pacific
Northwest. They are showing ingredients for possible thunderstorms,
most likely late Monday, which can become an elevated fire threat
with the dry, hot weather. Low confidence due to changing evolution
of the ridge and little alignment among the models. Early next week
will be a time to keep close eye on with the threat for lightning
and possible fire starts. Sunday through Tuesday`s high temperatures
are trending far above average reaching values in the upper 90s in
much of the region, with locations such as the Columbia Basin,
Lewiston, and Omak peaking a few degrees above 100. With three days
with these hot temperatures, this is beginning to look like a heat
wave and a potential need to issue to a heat advisory, or more. Heat
risk products are beginning to show much of the Inland NW as high
risk for the population. JS

&&

.AVIATION...
18z TAFS: VFR conditions expected for the TAF period. High clouds
associated with the passage of a weak upper level disturbance will
decrease through the day. Our TAF sites will experience typical
summer diurnal winds with speeds generally less than 15 mph with
exception of EAT receiving afternoon gusts near 20. /JDC

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        76  49  82  53  89  57 /   0   0   0   0   0   0
Coeur d`Alene  74  46  80  50  87  55 /   0   0   0   0   0   0
Pullman        73  42  80  46  88  52 /   0   0   0   0   0   0
Lewiston       81  53  86  57  94  62 /   0   0   0   0   0   0
Colville       78  45  85  47  91  51 /   0   0   0   0   0   0
Sandpoint      73  43  78  47  85  52 /   0   0   0   0   0   0
Kellogg        72  47  78  50  85  56 /   0   0   0   0   0   0
Moses Lake     83  49  86  53  94  60 /   0   0   0   0   0   0
Wenatchee      81  56  87  62  93  68 /   0   0   0   0   0   0
Omak           82  51  88  58  94  61 /   0   0   0   0   0   0

&&

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

&&

$$


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