Weather Service Report


277 
FXUS66 KOTX 260533
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
1033 PM PDT Thu Aug 25 2016

.SYNOPSIS...
Light northerly winds will continue with warm temperatures this
afternoon. A few mountain showers and thunderstorms are possible
near the Canadian border, otherwise expect dry weather. Area
wildfires have not produced as much smoke as in the last couple of
days, although these smaller smoke plumes will be pushed into the
Columbia Basin and the Palouse. Winds will switch Friday afternoon
with southwest winds, and this would change the smoke plume
spread. A strong cold front is expected to bring gusty west winds
Saturday and heighten wildfire concerns once again. Seasonal
temperatures return next week with an increase chance for showers
across the northern mountains.


&&

.DISCUSSION...
Tonight and Friday: The northerly flow pattern will continue and 
bring in some instability areas along the Canadian Border. This
is expected to perhaps trigger some rain showers and perhaps an
isolated thunderstorm into Thursday evening. Areas in the Columbia
Basin could experience patchy smoke downwind from wildfires on
Friday morning. By friday afternoon, winds switch from
Northeasterly to Southwesterly and shift the flow of smoke. 

Saturday: Saturday morning is expected to be similar to the
previous days. By the afternoon a Low in Central BC will begin to
drop further South and carry a cold front through the region. This
will increase the winds across the Columbia Basin to 10-20 MPH
with gusts reaching up to 30 MPH. These winds will combine with
low relative humidities in the region. This will produce fire
weather concerns as the already burning fires and any new starts
could spread quickly. 

High temperatures are expected to be in the upper 80s to low 90s
for this period. Lows will range in the 50s. /JDC


Sunday through Thursday: The Inland NW will be in a somewhat active 
pattern with a trough of low pressure slowly deepening in the
eastern Pacific. Between Sunday and Monday the westerly flow turns
southwest as another shortwave digs south along the BC coast. A
frontal boundary stalled near the Highway 2 corridor edges north.
On Sunday clouds and a slight shower threat lingers across the
Cascades and northern mountains. Some thunderstorms are also
possible toward the northeast mountains in the afternoon where
some pockets of instability lay. However any storms are not
expected to be too strong and precipitation amounts this day look
light as models don't show significant forcing. 

Sunday night into Monday the precipitation potential evolves with
the approaching shortwave. The risk increases over the Cascades
westward and the risk toward the northern mountains retreats
closer to the Canadian border. Some locally higher precipitation
amounts are possible near the Cascades, at least compared to
Sunday. Tuesday the shower threat lingers near the Cascades and
Canadian border but overall the risk looks smaller than Monday as
the shortwave starts to exit. 

Wednesday into Thursday models show another one or two shortwaves
pivoting in as the eastern Pacific trough deepens. Models do not
have a lot of consistency regarding timing and track. Either way
look for some renewed shower/t-storm threat across the Cascades
and northern mountains. A shower/t-storm threat will also start to
expand into portion of the Columbia Basin through southeast WA
into the central Panhandle. The better threat in these latter
areas will be on Thursday. 

As far as winds, model show some lingering breezy conditions
Sunday but overall values look lighter than Saturday. Occasionally
gusty conditions are possible each afternoon through the period
but nothing too strong. Temperatures are expected to be closer to
seasonal averages. /J. Cote'

&&

.AVIATION...
06Z TAFS: The Inland NW will be in a northerly flow with some
thicker passing middle and high clouds over TAF sites through the
overnight hours. Smoke from area wildfires may impact some of the
TAF sites, including near GEG/PUW but confidence is low. Afternoon
mountain cumulus will form again Friday, but by late in the
afternoon/early evening a thicker cirrus shield will move in from
the northwest ahead of Saturday's cold front.


&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        57  84  59  86  59  79 /   0   0   0   0  10  10 
Coeur d'Alene  53  83  55  84  56  79 /   0   0   0  10  10  10 
Pullman        48  85  53  86  53  81 /   0   0   0   0  10  10 
Lewiston       57  90  61  93  62  89 /   0   0   0   0  10  10 
Colville       51  87  53  87  53  80 /   0   0  10  10  10  20 
Sandpoint      49  80  50  82  52  76 /  10  10   0  10  10  20 
Kellogg        49  80  52  81  54  77 /   0  10   0   0  10  10 
Moses Lake     55  91  58  91  57  85 /   0   0   0   0  10  10 
Wenatchee      62  89  65  87  62  83 /   0   0   0   0  10  10 
Omak           58  89  59  89  56  83 /   0   0   0  10  10  10 

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...Fire Weather Watch from Saturday afternoon through Saturday 
     evening for Northern and Central Idaho Panhandle (Zone 101).

WA...Fire Weather Watch from Saturday afternoon through Saturday 
     evening for East Washington Palouse and Spokane Area (Zone 
     674).

&&

$$

Return to Home page


Western Regional Climate Center, wrcc@dri.edu