Area Forecast Discussion


429 
FXUS66 KOTX 220609
AFDOTX
Area Forecast Discussion
National Weather Service Spokane WA
1009 PM PST Wed Feb 21 2018
.SYNOPSIS...
Cold and generally dry conditions will persist through Friday
morning except for some passing light snow showers or flurries at
times. A pair of stronger storm systems will impact the region by
this weekend into early next week with the potential for snow and
breezy conditions for most locations.
&&
.DISCUSSION...
Evening update: An upper trough continues to dig along the Pacific
Northwest coast, with an embedded shortwave and semblance of
deformation axis across eastern WA. The embedded shortwave is
using the limited moisture and cold air to produce some flurries
and a few steadier snow showers. They are too shallow to pick up
near the Cascades, further away from the radar, but reports and
surface observations told of them falling. There has also been a
somewhat persistent but very narrow area of snow on radar near the
Spokane/Lincoln county border, produce some light accumulations
along parts of HWY 2 near Davenport to the West Plains of Spokane
area. Observations and web-cameras show this. Accumulations are 
trace amounts to less than an inch and this impact should be 
limited, but it is something to be cautious of when traveling 
tonight. 
The features producing this snow showers and flurries are 
expected to gradually sag southward tonight into Thursday morning.
The threat of isolated snow showers and flurries will linger 
through the night but should shift to mainly far southeastern 
WA/lower ID going into Thursday morning with increasing north-northeast
winds drying things out. Some of those winds are already picking 
up near Omak. 
Minor adjustments made to PoPs, sky cover and winds,
as well as overnight lows. Once again overnight lows will be 
tricky, as any clearing could allow temperatures to fall. However 
the increasing northerly winds should help to keep things mixed 
and the extensive cloud cover suggest for the large part the area 
will be warmer than tonight than last night. /J. Cote'
&&
.AVIATION...
06Z TAFS: An upper trough sags through, with clouds and flurries
and the occasional snow shower. The risk for snow showers will
lay over GEG/SFF/PUW/LWS with smaller chances near COE. The snow
will be light and perhaps may just be flurries. However they will
come with a threat of MVFR conditions. Conditions will improve
into Thursday morning and afternoon, with increasing north-
northeast winds. /J. Cote'
&&
.PRELIMINARY POINT TEMPS/POPS...
Spokane        14  26  11  29  23  36 /  20   0   0  20  70  40 
Coeur d'Alene   9  26   5  29  21  35 /  20   0   0  30  80  60 
Pullman        17  25  11  29  23  35 /  20  10  10  20  80  70 
Lewiston       22  29  19  36  29  42 /  30  20  10  10  30  70 
Colville       14  29   8  29  19  36 /  10   0   0  30  30  30 
Sandpoint      11  28  11  27  21  34 /  10   0   0  40  80  60 
Kellogg        11  25  12  26  20  31 /  20   0  10  20  90  80 
Moses Lake     19  32  15  37  25  44 /  10  10   0  10  10  20 
Wenatchee      16  30  18  36  25  43 /  20  10   0  10  10  20 
Omak           15  26  7   31  20  38 /  10  10   0  20  10  20 
&&
.OTX WATCHES/WARNINGS/ADVISORIES...
ID...None.
WA...None.
&&
$$