Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 312146
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
246 PM PDT TUE MAY 31 2016

.SYNOPSIS...
Warm and dry weather can be expected as high pressure builds
into the Inland Northwest. A dry cold front Wednesday will
produce breezy conditions Wednesday evening and Thursday as well
as slightly cooler temperatures Thursday before a substantial
warm up the rest of the week. Afternoon temperatures by the
weekend and into early next week will feel like summer, as many
areas reach 90 degrees or more for the first time this season.


&&

.DISCUSSION...

...RECORD BREAKING HEAT FOR THE WEEKEND...

Tonight: With the exception of some possible early evening
showers over the far north Cascades, the weather tonight will be
quiet over the Inland Northwest. Bands of mid and high clouds will
increase ahead of a cold front scheduled to arrive tomorrow
afternoon.

Wednesday: The cold front is progged by the NAM, GFS, and ECMWF to
jump the Cascades during the mid to late afternoon hours. The
front will largely pass without producing precipitation with the
exception of some widely scattered showers along the Canadian
border. South to southwest winds will increase ahead of the cold
front by late morning into the 10 to 15 mph range over much of the
Basin then swing around to the west as the front surges across
eastern Washington late in the afternoon and early in the evening.
Wind speeds won`t be out of the ordinary with sustained 10 to 20
mph over most of central and eastern Washington. Localized gusts
up to 30 mph will likely occur for several hours in the evening
through the Cascade gaps around Wenatchee, Chelan, Waterville, and
Vantage. The late day winds shouldn`t be as widespread or as gusty
as the winds that occurred on Sunday, but there will be a
heightened potential for rapid spread of low elevation grass and
brush fires along and south of the I-90 corridor from Ellensburg
to Moses Lake to western Spokane county.

Thursday: Chances for scattered showers have been added to the
Idaho Panhandle mountains Thursday. The NAM, GFS, and ECMWF have
introduced a weak upper level disturbance Thursday afternoon with
sufficient moisture and mid-level instability for a 20 to 30
percent chance of showers. A handful of lightning strikes may also
accompany some of the stronger cells in the afternoon. Thursday
will be breezy under the core of the Polar Jet. Humidity levels
will be on the increase, but sustained winds of 15 mph with gusts
to 25 mph will be sufficient to push any grass fires that develop
in the Basin. /GKoch

Friday through Tuesday: A very strong ridge of high pressure will
build in over the region for this weekend. Temperatures will soar
and culminate with record break heat on Sunday. More records could
fall on Monday as well with highs in the 90s expected both days.
Areas around Royal City and across the basin basin over to the
foothills of the Blue Mountains may even see triple digit heat.
Anyone with outdoor plans this weekend should prepare for hot
conditions. This week would be a good time to check the status of
air conditioners if available. Make sure that water is available
and that there is a plan to seek shade if outdoors during the
afternoon. If possible, outdoor activity will be best suited for
the morning and evening hours before or after the hottest period
of the day.

Models do show good agreement that temperatures will not be as
hot after Monday of next week. Cooler air is expected to funnel
through the Cascade gaps and spread out across the rest of the
region. The cooler air is expected to be accompanied by increased
winds. Sunday and Monday will be particularly dry. Increased
winds on Monday will bring a heightened fire weather concern due
to low relative humidity and breezy conditions. /SVH
&&

.AVIATION...
18Z TAFS: Bands of mid and high clouds will be on the increase
this evening into the overnight hours ahead of a cold front that
will arrive late tomorrow (Wed) afternoon. Winds will generally be
light and variable through the morning, and increase in the 17z-
20z time frame. The next round of TAFs will show the onset of
more wind tomorrow afternoon. /GKoch


&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        52  80  55  73  52  79 /   0   0  10  10   0   0
Coeur d`Alene  47  80  54  72  50  79 /   0   0  10  10   0   0
Pullman        47  79  53  72  49  77 /   0   0  10  10  10   0
Lewiston       53  85  60  80  56  85 /   0   0  10  10  10   0
Colville       45  82  52  76  48  83 /   0  10  10  10   0   0
Sandpoint      43  77  51  70  47  78 /   0  10  10  20   0   0
Kellogg        45  78  49  67  48  76 /   0  10  10  20  10   0
Moses Lake     51  86  59  80  53  86 /   0   0  10  10   0   0
Wenatchee      56  84  60  78  55  86 /   0   0  10  10   0   0
Omak           52  83  56  79  52  86 /   0  10  10  10   0   0

&&

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

$$



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