Area forecast discussion
National Weather Service Spokane Washington
1024 PM PDT sun may 19 2013
Synopsis...
evening showers will begin to wind down as the sun sets and a
ridge heads into the region. By Monday the ridge will become
firmly established over much of the region providing a dry and
warm day before a strong storm system enters the region on
Tuesday. Tuesday's weather system will bring a good threat of showers
and thunderstorms followed by significantly cooler temperatures.
Cool and showery weather will envelop the region from mid- week
into the Holiday weekend.
&&
Discussion...
update: increased pops a bit through the late afternoon/early
evening hours. We will continue to see some scattered showers
popping up over the region until we lose our surface heating with
sunset tonight. The main area of focus for showers will be across
the northern mountains of eastern Washington and in the northern Idaho
Panhandle. Skies will clear out tonight and winds will
remain weak. This will result in colder overnight low temperatures
in the mountain valleys compared to last night. I nudged low
temperatures down a little bit based off of the 18z model
guidance. Expect lows in the valleys dipping down into the upper
30s to low 40s for these locations and a bit warmer across the
basin. The added moisture from showers this afternoon will keep
the boundary layer moist as we decouple tonight across the
northern mountain valleys. With dew point temperatures in the mid
40s for these valleys, I do expect some patchy fog to develop
overnight into early tomorrow morning. This may include locations
such as Colville, Chewelah, Metaline Falls, Priest Lake,
Sandpoint, Deer Park and along the Spokane river. /Svh
&&
Aviation...
06z tafs: high pressure will begin to build in tonight. This will
result in mid level cloud cover decreasing through this period
except for over the Idaho Panhandle. Patchy fog is expected to develop
in the mountain valleys across northeast Washington and in the northern
Panhandle. This will include stretches along the Spokane river,
which may result in a couple hours of reduced visibilities at ksff
early in the morning around 12z. /Svh
&&
Preliminary point temps/pops...
Spokane 46 72 51 76 44 51 / 20 0 0 20 90 90
Coeur D'Alene 44 71 46 76 45 49 / 20 0 0 10 60 90
Pullman 41 71 48 75 42 50 / 10 0 0 10 70 60
Lewiston 47 79 52 81 49 57 / 0 0 0 10 60 60
Colville 43 78 45 77 46 55 / 20 0 0 40 90 80
Sandpoint 40 72 44 76 45 52 / 20 10 0 20 70 80
Kellogg 42 69 50 76 45 47 / 10 10 0 10 60 90
Moses Lake 47 80 51 73 47 60 / 0 0 0 40 50 30
Wenatchee 49 78 53 67 46 57 / 0 0 0 50 50 30
Omak 43 78 47 70 46 58 / 20 0 0 70 90 60
&&
Otx watches/warnings/advisories...
Idaho...none.
Washington...none.
&&
$$
