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Area forecast discussion 
National Weather Service Spokane Washington
858 am PDT sun may 24 2015

Synopsis...
today will be another warm day with temperatures in the upper 70s
to low 80s over much of the inland northwest. The arrival of a
cold front tonight will cool temperatures closer to average on
Memorial Day. The front will also bring an increasing chance of
showers and thunderstorms to the region. Some thunderstorms across
the northern mountains may become strong with hail and gusty
outflows winds possible. Slow moving afternoon thunderstorms
Monday, Tuesday, and Wednesday will be capable of producing
locally heavy rain. Next weekend looks to be quite warm with
Summer-like temperatures in the mid 80s to low 90s.



&&

Discussion...
update: the most noticeable change from the previous forecast was
the inclusion of the Moses Lake area into isolated thunderstorm
chance for this afternoon as a cold front pushes through the
region. The NAM still appears to be handling this system well as
it is picking up on the showers and instability along the east
sideof the Okanogan Valley along the Canadian border. With cape
values in the 500 j/kg and precipitable water values of under an
inch, small hail and brief heavy rain burst could be possible with
these thunderstorms. Temperatures were adjusted slightly but still
expected to be in the low 80s to mid 70s for today. /Jdc

&&

Aviation...
12z tafs: abundant boundary layer moisture is expected to result
in low cumulus development through the morning at the kpuw taf
site with MVFR cigs possible. An upper level low pressure system
will then push into the region out of southwestern British
Columbia this afternoon. This will result in scattered showers and
thunderstorms primarily east and north of the keat taf site. Best
chances for thunderstorms will be in the Cascade mtns north of
Lake Chelan over into the northern Panhandle. Thunderstorms will
develop over the Cascades early in the afternoon and then spread
eastward through the day into the overnight hours. There is
moderate confidence that at least isolated thunderstorms will
impact the kmwh, kgeg, ksff and kcoe taf sites. Confidence is low
that thunderstorms will impact keat, kpuw and klws taf sites. /Svh



&&

Preliminary point temps/pops...
Spokane 79 54 71 51 73 52 / 10 50 60 40 50 40
Coeur D'Alene 79 53 70 49 73 50 / 10 30 60 40 50 40
Pullman 73 50 70 45 71 47 / 10 20 30 10 30 30
Lewiston 81 54 77 52 78 55 / 20 20 30 10 30 30
Colville 83 53 72 50 76 50 / 40 70 70 60 70 40
Sandpoint 79 52 70 48 71 50 / 10 50 70 60 60 50
Kellogg 78 51 71 46 72 47 / 10 30 70 50 60 50
Moses Lake 84 55 79 54 80 53 / 20 20 10 20 40 20
Wenatchee 82 55 78 56 78 58 / 20 10 20 20 50 30
Omak 83 53 76 51 78 51 / 60 60 60 50 60 40

&&

Otx watches/warnings/advisories...
Idaho...none.
Washington...none.
&&

$$

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