Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 291820
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
1120 AM PDT Mon May 29 2017

.SYNOPSIS...
High pressure continues over the Inland Northwest through Tuesday
with unseasonably warm temperatures. There is a small chance of
thunderstorms in the higher elevations, otherwise expect dry
weather. This warm spell will contribute to rises on rivers from
the Cascades into north Idaho. A cold front arrives Tuesday night
with a better chance of showers and thunderstorms. This will be
followed by cooler and unsettled weather for Wednesday into the
rest of the week.

&&

.DISCUSSION...
Rest of today...Large upper level ridge to remain poised over the
Inland NW again today. This will lead to sunny and warm conditions
for most locations, but much like yesterday we will likely see the
development of showers and isolated thunderstorms on the periphery
of the ridge. The best chances will likely occur over the
mountains of northern Washington and north Idaho. This is where
the convective allowing models are showing the most consistency of
developing showers and thunderstorms based mainly on orographic
ascent and a lack of a strong capping inversion. The development
is a little slower than what we saw yesterday at this time,
however we still have confidence they will begin to develop over
the next couple hours. Aside from the precipitation threat the
main story will be warm temperatures. 850 mb temps off the 12z
soundings showed 1-2c of warming compared to 24 hrs ago and this
should translate down to the ground as well. Nudged high temps up
slightly to reflect this change which results in widespread
temperatures in the mid 80s to mid 90s, which is quite impressive.
While these aren`t record highs for the date, they are likely the
warmest Memorial Day since 1995 (and perhaps close to an even
warmer 1992). fx

&&

.AVIATION...
12Z TAFS: Dominating ridge will lead to VFR conditions at all TAF
sites through the entire period. Main concern will be the
development of showers and thunderstorms over the mountains of N
WA and N ID, but far away from the TAF sites. fx

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        87  60  87  58  75  53 /  10   0   0  40  20  10
Coeur d`Alene  85  56  86  55  74  51 /  10   0   0  30  20  20
Pullman        84  55  85  55  73  52 /  10   0   0  20  20  30
Lewiston       91  59  91  61  80  56 /  10   0   0  20  20  30
Colville       88  56  87  58  76  52 /  10   0   0  40  40  20
Sandpoint      83  53  84  54  75  49 /  10  10  10  10  40  40
Kellogg        84  53  84  53  76  47 /  10  10   0  10  30  50
Moses Lake     93  58  94  60  83  55 /  10   0   0  40  10  10
Wenatchee      90  64  89  58  80  58 /  10  10  10  30  10  10
Omak           91  58  90  60  81  53 /  10  10  10  50  40  10

&&

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

$$



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