Area Forecast Discussion
Issued by NWS Spokane, WA

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559
FXUS66 KOTX 230006
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
506 PM PDT Sun Jul 22 2018

.SYNOPSIS...
Mainly dry weather will persist into next week with warming
temperatures. Patchy smoke and haze will be found across parts of
the Inland Northwest from regional wildfires. While breezy north
winds develop in the Okanogan Valley, a few thunderstorms are
possible along the Canadian border this week. Look for hot
temperatures next weekend.

&&

.DISCUSSION...
Tonight through Monday night: Dry westerly flow will continue over
the Inland NW. High pressure will build in from the south and
temperatures will gradually warm. Winds will be lighter in most
areas, coming from the north to northeast. The exception will be
the north winds funneling down the Okanogan valley into the
Waterville Plateau where some locally gusty winds are possible
Monday and Monday night. A weather disturbance will move across
the Canadian Rockies and spread some mid level moisture toward the
Canadian border Monday afternoon. This coupled with weak
instability will lead to mountain cumulus buildups along the
Canadian border, and possibly a stray high based shower or
lightning strike, especially across the northern Cascades. Dry
weather will dominate the region. /rfox.

Tuesday through Sunday...High pressure over the 4 corner`s area,
along with an area of low pressure over Manitoba will put the
region in a dry northwest flow through Wednesday. The result will
be very warm temperatures and very dry relative humidity.
Temperatures will be in the upper 80s to near 100, and about 5-7
degrees above normal. Winds will become northerly Monday night and
Tuesday behind an exiting wave. Winds down the Okanogan valley
will increase to 10-20 mph with gusts 20-25 mph Tuesday morning.
The winds will decrease some after sunset, then pick up again
Wednesdays morning. In addition relative humidity will be in the
15-25 percent range. These conditions flirt with critical fire
weather criteria. For now will this will be highlighted in the
fire weather forecast while we take a better look the next 24
hours.

Model guidance has been hinting at a bit more organized wave
Thursday and Friday the current 12z model runs are in better
agreement today. A deep moisture source still appears to be an
issue. But even with lack of moisture it looks like thee will be
some isolated showers and thunderstorms for the northeast
mountains and portions of the Idaho Panhandle mountains. Showers
and thunderstorms were added in an earlier forecast, and while
locations were adjusted slightly, they were pretty much left in
place. Fuels are either at critical stages or will be there soon
across the northern mountains and the Panhandle. Some of the
previous lightning across the region the past week or so has been
very efficient in starting fires and this will likely be the case
here. This will have to be monitored closely the next few days.
For the remainder of the area temperatures will remain very warm
and conditions quite dry. By Saturday and Sunday high pressure
pushes north and strengthens over the region for warmer
temperatures and continued dry conditions. Tobin

&&

.AVIATION...
00Z TAFS: Weak westerly flow over the region through Monday
afternoon. Conditions should remain mostly clear with the
exception of areas of elevated smoke from regional wildfires, but
with VFR conditions. Winds are forecast to be less than 10kts.
/SVH

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        58  88  62  91  62  92 /   0   0   0   0   0   0
Coeur d`Alene  52  87  56  89  57  90 /   0   0   0   0   0   0
Pullman        51  88  55  89  57  90 /   0   0   0   0   0   0
Lewiston       60  95  63  97  64  98 /   0   0   0   0   0   0
Colville       52  88  54  92  55  94 /   0   0   0   0   0   0
Sandpoint      49  84  51  86  53  88 /   0   0   0   0   0   0
Kellogg        52  84  54  87  56  87 /   0   0   0   0   0   0
Moses Lake     56  95  59  96  62  97 /   0   0   0   0   0   0
Wenatchee      64  93  67  95  67  96 /   0   0   0   0   0   0
Omak           60  92  62  95  63  96 /   0   0   0   0   0   0

&&

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

&&

$$



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