Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 272107
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
207 PM PDT Thu Jul 27 2017

.SYNOPSIS...
Warm and dry weather will continue for the next couple days.
There is a slight chance of thunderstorms across the southern
Panhandle late today into Friday. Breezy winds will also develop
across the Columbia Basin this afternoon. Hot weather will return
for the weekend and into the middle of next week.

&&

.DISCUSSION...
Tonight through Saturday: The region will remain in a fairly dry
southwest flow pattern. Much of the North American monsoonal
moisture will remain south of the region. Models are showing some
weak mid level instability across the far southeast portion of the
region Friday morning into the early afternoon. This will be very
similar to what we saw earlier today. There will be enough
instability for some altocumulus castellanus (ACCAS) and possibly
virga or sprinkles, but unlikely to see measurable precipitation.
A quiet weather day is expected Saturday and temperatures will
remain steady heading into the weekend with highs in the 90s.
/SVH

Sunday and Monday...An Upper level low currently just moving into
the Gulf of Alaska will take up position off Haida Gwaii by
Saturday. A fast moving scondary wave will take a similar track
and nudge that low inland Saurday night and Sunday. This will drag
a weakening cold front through mainly British Columbia. Very
little moisture will be associated with the front and about the
only thing we will see east of the Cascades will be slightly
elevated winds with gusts around 15 mph through the Basin and the
Palouse on Sunday, then variable light winds on Monday. We will
also see slightly cooler temperatures, but highs will still be in
the 90s 4-6 degrees above average.

Tuesday through Thursday...The aforementioned secondary low will
strengthen in the eastern Pacific, pumpig up high pressure over
the Pac ANAW. Meanwhile high pressure will also strengthen over
the desert Southwest in the vicinity of the four corners region.
This will allow 500 mb heights to increase with tempertures
warming into the mid to upper 90s. Monsoon moisture wrapping
around the four corners high will get pushed nort towards the
region around mid-week. This is usually a good pattern for
elevated convection across the region. However model guidance has
been pretty consistent showing a couple of weak waves ejecting off
the main eastern Pacific low at times. This will flatten out the
ridge with the main flow becoming a little more westerly. This
would keep the moisture from advecting this far north. But it is
going to be hot. Tobin

&&

.AVIATION...
18Z TAFS: A weak upper level disturbance passing through extreme
eastern WA and into the ID Panhandle will result scattered to
broken altocumulus castellanus clouds this morning into the early
afternoon. A few sprinkles will be possible from these clouds and
mainly into the Central Panhandle Mtns. A weak cold front will
then push into eastern WA this afternoon. Winds ahead of the front
will increase with gusts between 15-20 kts possible across the
basin and into KGEG. Stronger winds with gusts to between 20-25
kts are expected at KEAT this evening behind the front. /SVH

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        61  90  62  92  63  91 /   0   0   0   0   0   0
Coeur d`Alene  57  89  56  92  56  91 /   0   0   0   0   0   0
Pullman        57  89  57  92  57  89 /   0  10   0   0   0   0
Lewiston       65  97  66 100  66  97 /   0  10   0   0   0   0
Colville       55  91  54  94  55  93 /   0   0   0   0   0   0
Sandpoint      50  87  49  90  50  90 /   0   0   0   0   0   0
Kellogg        55  87  56  89  56  89 /   0   0   0   0   0   0
Moses Lake     57  92  56  96  58  94 /   0   0   0   0   0   0
Wenatchee      62  92  63  94  66  94 /   0   0   0   0   0   0
Omak           60  93  59  96  60  95 /   0   0   0   0   0   0

&&

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

$$



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