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FXUS66 KOTX 182126
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
226 PM PDT Mon Mar 18 2019

.SYNOPSIS...
Dry and mild conditions are expected through at least Thursday
with clear skies. Wednesday should be the warmest day with highs
in the upper 50s to mid 60s with subtle cooling on Thursday. High
pressure will break down late Friday with a chance of precipitation
Saturday and Sunday.


&&

.DISCUSSION...
Tonight and Tomorrow: No major impacts are expected for this period.
The continuing high pressure and warm weather is expected for this
period. As more snow melts, rises on streams and creeks will still
produce minimal impacts if any. Overnight temperatures will be in
the range of freezing. Highs for tomorrow will be in the upper 50s
to low 60s bringing the region its warmest day of the year so far.
/JDC

Tuesday night through Friday...The warm and dry conditions from the
past few days will continue into Friday as high pressure
dominates the region. Temperatures in the mid 50s to around 60
will be likely through Friday, with the warmest day Wednesday
where temperatures will push into the lower 60s. Minimum
temperatures will be within a few degrees either side of freezing.
Warm temperatures will result in good melting of the snow pack
the next few days with many areas in the Columbia Basin and the
Palouse likely slowly losing all of the snow. Increased run-off
will result in some rises on streams and small rivers, some
localized ponding along roads and possibly some boggy fields. At
this time no flooding is expected. By Thursday and Friday the
ridge will get slowly pushed out of the region as one Pacific
storm system moves into California and another moves into the
eastern Pacific. This will result in slightly cooler temperatures
and increasing clouds by Friday afternoon, and possibly some light
snow near the Cascade crest

Late Friday through Monday...The Pacific storm system in the east
Pacific will eject off a short wave disturbance Friday night and
early Saturday morning, while the parent low continues to spin out
around 150W. This weaker wave will tap into deeper moisture but it
doesn't appear to be particularly strong. This will be a fairly
mild weather disturbance with snow levels starting out between
5500-6500 feet, then cooling off to 3500-4500 behind the cold
front on Saturday. Isentropic lift is not stellar by any means,
but guidance is picking up a mid level circulation over the
Okanogan Highlands Saturday morning. This will be the area that
should get the heaviest precipitation. Over all it looks like
light precipitation across the lowlands with less than a tenth of
an inch possible, up to a quarter inch for the mountains and close
to a half inch fr the Okanogan Highlands. With the snow levels
this high snow accumulations will only be a couple of inches
across the higher terrain. Mountain snow showers will be kept in
the forecast for Sunday and Sunday night, then conditions will dry
out Monday and Monday night. Temperatures will cool off Sunday and
Monday but remain on the warm side of normal. Tobin

&&

.AVIATION...
18Z TAFS: VFR conditions with clear skies and light winds the
next 24 hours. /JDC


&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane 30 58 32 61 32 57 / 0 0 0 0 0 0
Coeur d'Alene 30 56 33 60 33 59 / 0 0 0 0 0 0
Pullman 31 56 33 58 31 57 / 0 0 0 0 0 0
Lewiston 34 59 36 61 37 59 / 0 0 0 0 0 0
Colville 28 61 30 64 32 62 / 0 0 0 0 0 0
Sandpoint 31 56 34 60 35 59 / 0 0 0 0 0 0
Kellogg 31 56 33 60 34 59 / 0 0 0 0 0 0
Moses Lake 30 61 34 64 34 59 / 0 0 0 0 0 0
Wenatchee 33 54 34 56 34 59 / 0 0 0 0 0 0
Omak 32 57 35 61 35 60 / 0 0 0 0 0 0

&&

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

&&

$$
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