Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 061757
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
1057 AM PDT WED MAY 6 2015

.SYNOPSIS...
A low pressure system will result in afternoon convection once
again today...mainly over the Cascades and Okanogan Highlands.
The weather will generally be dry and warm through the end of the
workweek, except for a small chance of mountain showers over the
Idaho Panhandle on Friday. Temperatures will moderate a bit by
the weekend as another weak disturbance approaches the coast. This
feature will likely pass into the area early next week with a
return to cooler temperatures and a chance of precipitation.


&&

.DISCUSSION...
Forecast overall remains on track for today. An elongated upper
level low pressure system will result in showers across much of
the higher terrain today. Current observations at 10:30 AM already
shows that the ridge tops have reached their convective
temperature with showers being observed over the northern
mountains, in the ID Panhandle and over the NE Blue Mtns. Shower
coverage will increase with surface heating this afternoon. The
caveat will be over the basin and especially over the eastern
basin. Dew points are still quite low in the 20s and low 30s. This
is expected to result in more virga than anything over much of the
eastern portion of the basin. Colder temperatures aloft will
reside over the western portion of the forecast area, so the
western basin is expected to see some isolated shower activity in
the afternoon. Models continue to show a minimal thunderstorm
threat today. Best chances for isolated thunderstorms is expected
over the east slopes of the northern Cascades and the Okanogan
Highlands where 500 mb temps or coldest at around -28 to -29
Celsius. /SVH


&&

.AVIATION...
18Z TAFS: VFR conditions expected at all TAF sites through 18Z
Thursday. An upper level trough of lower pressure will reside
over the region today. This will result in scattered showers
across the mountains and isolated showers into the western basin
through this afternoon. Some showers may become strong enough to
develop into thunderstorms over the Cascades and over the Okanogan
Highlands. The upper level low will drift south of the region
tonight with some wrap around moisture possible into KLWS and
KPUW. /SVH


&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        61  41  69  42  69  41 /  20  10   0   0  10   0
Coeur d`Alene  61  40  68  39  68  39 /  20  10   0   0  10  10
Pullman        59  40  67  38  69  37 /  10  10  10  10  10   0
Lewiston       65  44  73  44  74  44 /  10  20  10  10  10   0
Colville       64  41  72  41  73  40 /  30  20   0   0  10   0
Sandpoint      61  36  67  36  66  34 /  20  10   0   0  10  10
Kellogg        59  39  66  37  66  37 /  10  10  10  10  10  10
Moses Lake     67  43  76  46  77  44 /  20  10   0   0   0   0
Wenatchee      65  44  75  48  78  48 /  20  10   0   0   0  10
Omak           65  42  74  42  75  42 /  20  10   0   0   0   0

&&

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

$$



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