Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 262341
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
441 PM PDT Mon Jun 26 2017

.SYNOPSIS...
Thunderstorms will move through the region this afternoon and
tonight. Some of these storms could be strong with gusty winds.
There will be a short cooling trend Tuesday and Wednesday with
isolated mountain showers on Wednesday. Then warmer conditions
will return Friday and Saturday.


&&

.DISCUSSION...
Tonight: Thunderstorms are firing over central Oregon this
afternoon and are headed north. CAM models have this fairly well
depicted, but look to be a few hours slow. These storms should
reach the Lewiston area around 5pm and the Spokane/CdA area by
7pm. Strong winds will be the primary threat from these storms,
but some hail is also possible. After this activity moves into
Montana, a cold front will sweep through the area. This could
reorganize convection along a line in southeast WA which would
move into the southern Panhandle overnight. These storms (if they
do form) would likely not pose any potential for damage. RJ

Tuesday and Wednesday...The upper level low will track slowly east
through with a couple of weak short waves wrapping through the
northeast portion of our forecast area. But with very dry air
moving in behind the cold front on Tuesday it doesn`t look like
there will be much chance for any showers across the Northeast
mountain or the North Panhandle. A bigger impact will be the
relative humidity dropping down to the teens to low 20 percent
across the region. Fortunately winds will be light. A little
deeper mid level moisture will wrap around the low on Wednesday
and will result in isolated showers over the mountains. The wave
on Wednesday will also increase the winds with gusts 15 to 20 mph
likely Wednesday afternoon. Temperatures will cool behind the
front into the lower 80s on Tuesday and 70s and 80s on Wednesday.

Thursday and Friday...High pressure will build in from the west
Thursday and Friday for a warming trend. Temperatures will bump
right back into the upper 80s to mid 90s by Friday. There is a
small chance for a weak wave to undercut the ridge on Friday which
would result in a few mountain showers near the Cascades, but
confidence is not very high at the time. Winds will be light and
variable.

Saturday through Monday...A series of weak disturbances will track
through B.C. Each of these waves will tap into some decent
moisture, enough to support late day showers and thunderstorms
across the northern zones, near the Canadian border. There will
also bring cooler temperatures to the region with high
temperatures cooling down into 70s and 80s, but still on the warm
side of normal. Tobin

&&

.AVIATION...
00Z TAFS: Thunderstorms will impact the TAF sites from LWS
northward to GEG. The main threst is for strong winds from these
storms. Convection will last for a few hours this evening. There
is a remote chance of a second round of storms for PUW and LWS but
the probability is low at this point. Otherwise, gusty winds are
expected this evening, even without the thunderstorms.  RJ


&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        60  83  55  81  56  85 /  50   0   0  10  10   0
Coeur d`Alene  58  80  52  78  52  82 /  60   0   0  10  10   0
Pullman        59  79  52  77  51  81 /  40  10   0   0   0   0
Lewiston       63  86  57  85  57  88 /  60  10   0   0   0   0
Colville       54  84  52  82  51  85 /  50   0   0  10  10   0
Sandpoint      53  80  48  77  47  80 /  60   0   0  20  20   0
Kellogg        54  77  51  75  50  78 /  50  10   0  20  10   0
Moses Lake     58  88  53  87  54  90 /  10   0   0   0   0   0
Wenatchee      60  86  57  84  58  90 /  20   0   0   0   0   0
Omak           55  86  52  84  53  88 /  20   0   0  10   0   0

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...None.
WA...Red Flag Warning until 8 PM PDT this evening for East Washington
     Central Cascade Valleys (Zone 677).

&&

$$


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