Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 231601
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
901 AM PDT SAT MAY 23 2015

.SYNOPSIS...
The Memorial Day Weekend is expected to be warmer than average,
with afternoon temperatures in the 70s and 80s. Look for scattered
showers and thunderstorms this weekend into next week. Some
thunderstorms will be capable of producing heavy downpours and
frequent lightning.

&&

.DISCUSSION...
Rest of today: A few minor changes to todays fcst were
made...mainly to adjust sky cover. With the regional mosaic radar
loop showing a band of rain showers that have moved west of
Wenatchee and past the Cascade crest, we anticipate our next
round of pcpn to be diurnally driven as clearing skies work their
way west across the Columbia Basin. These clearing skies will
allow for better insolation and thus help to produce higher SBCAPE
by peak heating this afternoon. Though there will be a short- wave
trough (currently upstream near the BC coast) that will move south
across the region by tonight, it looks like it won`t have a
significant contribution synoptically for the thunder threat in
the Cascade we have for this afternoon. This will be an important
issue this evening and Sunday given the recent burn scar potential
for debris flow. As of now, we don`t anticipate an issues. We also
left thunder in the fcst for SE WA and the Cntrl Idaho Panhandle
later today and this evening as the wave approaches and the sfc
remains uncapped. There`s sufficient convective inhibition across
NE Wa and the N Idaho Panhandle that thunder does not look like a
threat for today. bz

&&

.AVIATION...
12Z TAFS: Isolated showers will linger near KEAT and KMWH early
this morning. Diurnally driven showers and thunderstorms will be
possible this afternoon over the higher terrain along the east
slopes of the northern Cascades, over the Northeast Blue Mtns and
over the southern and central Panhandle Mtns. Any storms that
develop over the Central Panhandle Mtns may impact KPUW and KLWS
TAF locations as storm motion will be to the west and southwest;
however, confidence is low since thunderstorms are expected to
dissipate quickly as they move off of the higher terrain. /SVH

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        81  53  79  55  71  51 /  10  10  10  30  50  50
Coeur d`Alene  80  53  80  54  70  48 /  10  10  10  30  50  50
Pullman        75  47  74  49  70  46 /  20  20  10  10  20  20
Lewiston       83  55  81  56  78  53 /  20  30  10  20  20  20
Colville       84  53  82  53  73  50 /  10  10  20  40  70  50
Sandpoint      80  48  79  51  70  47 /  10   0  10  30  60  50
Kellogg        77  49  78  50  70  47 /  20  10  10  20  60  50
Moses Lake     85  55  83  55  80  52 /  10  10  20  20  20  20
Wenatchee      85  59  82  57  78  55 /  20  10  20  20  20  20
Omak           87  53  83  52  76  51 /  10  10  40  40  50  40

&&

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

$$



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