Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 241748
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
1048 AM PDT THU APR 24 2014

.SYNOPSIS...
Occasional precipitation chances, breezy conditions and relatively
cool temperatures dominate the weather pattern. Showers along with
a chance of thunderstorms is expected for the remainder of this
afternoon especially over Eastern Washington into the Idaho
Panhandle. Showers will remain a threat into the weekend, before
a relative lull comes for the start of the new work week.


&&

.DISCUSSION...

...POTENTIAL FOR A FEW STRONG THUNDERSTORMS THIS AFTERNOON...

Update: Radar imagery as of 10 am showed the band of steady rain
for the Idaho Panhandle beginning to weaken as the warm front
exits the area. Focus now will be on afternoon convection. The 12z
GFS and NAM models show the axis of best instability this
afternoon stretching from the Okanogan Highlands and Northeast
Washington Mountains south through the eastern third of Washington
into the Idaho Panhandle. Uncapped CAPE values as high as 500-900
J/KG along with 0-6km bulk shear values of 20-40 kts will support
the potential for stronger storms with the best shear stretching
from the Blue Mountains into the Central Panhandle Mountains where
the best threat of strong storms will lie. Gusty outflow winds and
hail will be the main concern. Downslope flow off the Cascades
with drying aloft mixing to the surface will reduce surface based
CAPE values through the afternoon for Wenatchee and Moses Lake.
This should keep shower coverage isolated at best for this
afternoon with the best chances for an isolated thunderstorm
occurring prior to 21z. JW

&&

.AVIATION...
18Z TAFS: The atmosphere will become increasingly unstable into
the afternoon with the potential for thunderstorms between 19z-
02z mainly over the eastern third of Washington and North Idaho.
Some stronger storms are possible with gusty winds, hail, and
heavier rain. CIGS will be mainly VFR for this afternoon as MVFR
CIGS this morning gradually rise. MVFR CIGS will hang on longest
over the North Idaho Panhandle. Showers and thunderstorms will
decrease this evening as the lower atmosphere stabilizes. Another
wave coming up from the southwest will bring an increase in
mid/high clouds overnight with -RA possibly developing at
KLWS/KPUW Friday morning. JW

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        56  36  54  37  55  36 /  80  60  30  30  20  20
Coeur d`Alene  53  35  54  37  54  34 /  80  70  40  40  40  20
Pullman        55  37  51  37  53  35 /  80  50  50  50  20  20
Lewiston       61  43  55  42  58  40 /  60  50  60  50  10  20
Colville       59  33  60  36  61  34 /  80  20  40  20  50  40
Sandpoint      50  34  54  37  53  34 /  90  80  40  70  80  40
Kellogg        51  34  52  36  49  34 / 100  70  60  80  70  30
Moses Lake     64  38  61  38  63  40 /  20  10  20  10   0  30
Wenatchee      62  42  61  41  63  43 /  20  10  30  10   0  30
Omak           62  34  61  35  63  36 /  30  10  20  10   0  30

&&

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

$$




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