Omak, Washington Weather Conditions

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Air Stagnation Advisory View All Alerts

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Current Conditions

  • 37°
  • Overcast
  • Wind: SW 5 mph
  • Humidity: 93%
  • Visibility: 10.0 miles
  • Dew Point: 35°
  • Pressure: 30.02 in. +
  • Heat Index: 33

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Next 12 Hours

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7  pm
10  pm
1  am
4  am
Chance of Snow
Chance of Snow
Chance of Snow
Chance of Snow
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Thursday
  • Chance of Snow
  • High: 37 °
  • Low: 32 °
  • Chance of Snow
  • Friday
  • Snow
  • High: 36 °
  • Low: 30 °
  • Snow
  • Saturday
  • Snow
  • High: 36 °
  • Low: 30 °
  • Snow
  • Sunday
  • Mostly Cloudy
  • High: 41 °
  • Low: 34 °
  • Mostly Cloudy
  • Monday
  • Fog
  • High: 37 °
  • Low: 30 °
  • Fog

Forecast for Omak, Washington

Updated: 1:00 PM PST on December 18, 2014

Air stagnation advisory in effect until noon PST Friday...
  • Thursday

    Overcast with a chance of snow and a chance of rain in the afternoon. Fog early. High of 36F. Winds from the South at 5 to 10 mph. Chance of snow 70%.

  • Thursday Night

    Overcast with snow, then snow and rain after midnight. Fog overnight. Low of 32F. Winds less than 5 mph. Chance of snow 90%.

  • Friday

    Overcast with snow and a chance of rain. Fog early. High of 36F. Winds from the South at 5 to 10 mph. Chance of snow 80%.

  • Friday Night

    Overcast with snow and rain after midnight. Fog overnight. Low of 30F. Winds from the SSE at 5 to 10 mph. Chance of snow 70%.

  • Saturday

    Overcast with snow and rain. High of 36F with a windchill as low as 28F. Winds from the South at 5 to 10 mph. Chance of snow 80%.

  • Saturday Night

    Overcast with a chance of snow and rain showers. Low of 30F. Winds less than 5 mph.

  • Sunday

    Overcast. High of 41F. Winds less than 5 mph.

  • Sunday Night

    Mostly cloudy in the evening, then overcast with a chance of snow and rain showers. Fog overnight. Low of 34F. Winds less than 5 mph. Chance of snow 20%.

  • Monday

    Overcast in the morning, then mostly cloudy. Fog early. High of 37F. Winds less than 5 mph.

  • Monday Night

    Partly cloudy. Low of 30F. Winds less than 5 mph.

  • Tuesday

    Overcast. High of 41F. Winds from the South at 5 to 10 mph.

  • Tuesday Night

    Overcast. Fog overnight. Low of 21F. Winds less than 5 mph.

  • Wednesday

    Partly cloudy. Fog early. High of 34F with a windchill as low as 21F. Winds from the NNW at 5 to 10 mph.

  • Wednesday Night

    Clear. Low of 21F. Winds from the NNW at 5 to 10 mph.

  • Thursday

    Partly cloudy. High of 28F. Winds less than 5 mph.

  • Thursday Night

    Partly cloudy. Low of 1F. Winds less than 5 mph.

  • Friday

    Partly cloudy. Fog early. High of 18F. Winds less than 5 mph.

  • Friday Night

    Partly cloudy. Fog overnight. Low of 10F. Winds less than 5 mph.

  • Saturday

    Clear. High of 25F. Winds less than 5 mph.

  • Saturday Night

    Clear. Low of 10F. Winds less than 5 mph.

  • Sunday

    Clear. High of 27F. Winds less than 5 mph.

  • Sunday Night

    Clear. Low of 10F. Winds less than 5 mph.

  • Monday

    Clear. High of 25F. Winds less than 5 mph.

Severe Weather Alert Descriptions

 Air Stagnation Advisory  Statement as of 10:46 am PST on December 18, 2014

... Air stagnation advisory remains in effect until noon PST

* air quality... light winds and stable conditions will increase
the potential for build up of pollutants near the surface.

* Timing... high pressure will persist through Friday morning.

* Impacts... prolonged periods of stagnant air can lock fine
particulate matter close to the ground and degrade air quality.

Precautionary/preparedness actions...

An air stagnation advisory indicates that due to limited movement
of an air mass across the advisory area... pollution has the
potential to increase to dangerous levels. Persons with
respiratory illness should follow their physicians advice for
dealing with high levels of air pollution.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Brewster, WA

Updated: 3:44 PM PST

Temperature: 36.9 °F Dew Point: 35 °F Humidity: 94% Wind: Calm Pressure: 30.02 in Hourly Precipitation: 0.00 in Windchill: 37 °F Graphs

Location: Sinlahekin Wildlife Area, Loomis, WA

Updated: 3:44 PM PST

Temperature: 37.2 °F Dew Point: 34 °F Humidity: 89% Wind: SSE at 4.0 mph Pressure: 30.02 in Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

Location: MesoWest Loup Loup Summit WA US WA DOT, Malott, WA

Updated: 2:10 PM PST

Temperature: 28 °F Dew Point: 28 °F Humidity: 100% Wind: ENE at 2 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 28 °F Graphs

Location: RAWS LEECHER WA US, Carlton, WA

Updated: 2:25 PM PST

Temperature: 27 °F Dew Point: 27 °F Humidity: 100% Wind: SE at 3 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 27 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion

Area forecast discussion 
National Weather Service Spokane Washington 
307 PM PST Thursday Dec 18 2014 

a more active weather pattern will continue into early next week. 
Another weather system will bring snow to the mountains with 
mainly rain for the valleys tonight into Friday. A stronger storm 
Saturday into Sunday will bring mainly rain for the 
well as mountain snow with rising snow levels. Temperatures are 
expected to remain above average through early next week...before 
dropping down towards normal values by Christmas day. 


tonight and Friday...there is good model agreement of an occluded 
front tracking into central and eastern Washington 
tonight...reaching north Idaho Friday morning. There is good model 
agreement of this system bringing widespread precipitation to the 
region due to a combination of isentropic already moist 
low level air well as upper jet support with a south- 
north jet oriented parallel to the front. Isentropic ascent will 
be maximized in the Cascades and northern mountains with low level 
upslope flow into these areas as well. However this is a quick 
moving front...with models generating anywhere between a tenth to 
a quarter inch of liquid with locally up to a half inch over the 
high terrain of the northern mountains. Based on current wet bulb 
temperatures and model snow levels with this system...most valley 
areas will see rain with snow in the mountains. Exception is the 
Methow Valley where expected low temps near 32f should allow for 
2-3 inches of snow. Republic may also see light accumulations with 
expected snow levels in the Okanogan Highlands between 2000-2500 
feet. The mountains will pick up 3 to 6 inches of snow with this 
system with winter driving conditions likely over the mountain 
passes. Jw 

..major storm expected to dump heavy precipitation and heavy 
mountain snows to portions of the inland northwest this weekend... 

Saturday through Monday...confidence is still very good that a 
very impressive atmospheric river will impact the region through 
much of this period. As of 2pm...the leading edge of the river was 
located just west of 160w and moving steadily eastward. Most model 
solutions take the leading edge of this moisture onto the 
Washington coast early Saturday morning and into the Cascades 
before midday. It will then cross the remainder of the forecast 
area during the day with the passage of a strong warm front. The 
atmospheric river will generally remain locked over the region 
through Sunday. Strong isentropic ascent associated with the warm 
front will spell measurable precipitation for all locations on 
Saturday. Then the mid-level warm air advection will either cease 
or weaken sometime late Saturday evening resulting in a developing 
rain shadow which will either end the threat of precipitation in 
the Lee of the Cascades or at least significantly lower the 
chances. This would affect Wenatchee, the Columbia Basin, Okanogan 
valleys and to a lesser extent the Palouse and Spokane area. 
Meanwhile moderate orographic ascent from low-level west-southwest 
winds will keep persistent precipitation going over most of the 
Idaho Panhandle and near the crest. Whether or not the 
precipitation rates pick up again on Sunday or Monday in the Lee 
of the Cascades is questionable. The NAM shows a strong enough 
shortwave trough to lift the atmospheric river northward on Sunday 
resulting in another round of precipitation, albeit significantly 
lighter than that which falls on Saturday. By Monday the plume of 
moisture is expected to sag south of the Oregon/Washington border 
with precipitation rates falling off over most areas...however 
residual precipitation will likely continue mainly over the 
mountains...especially over southeast Washington the southern Cascades 
and the southern Idaho Panhandle. So from an impact standpoint 
here's what we are expecting. 

*Precipitation type and amounts...this is likely the most 
difficult part of this forecast. Our confidence is quite high 
that significant precipitation will fall. Total precipitation 
amounts near the Cascade crest will likely range from 1.5-3.0 
inches and anywhere from 0.75-1.50 inches over the Panhandle 
mountains. Meanwhile totals across the remainder of the forecast 
area will generally range from 0.40-1.00 inches. If the 
atmospheric river decided to remain fixed over our area...instead 
of slowly sagging south these values would undoubtedly need to be 
raised. Instead it looks like the brunt of the river will focus 
on points south of our forecast area...but not by much. As for 
precipitation type that is easily the toughest part of this 
forecast. Not necessarily for the mountains, but for the valleys, 
mainly in the Cascades. Initially snow levels will be close to 
the valley floors near the Cascades but they should steadily rise 
through the weekend. By Sunday we will be looking at snow levels 
ranging from nearly 4k feet near the Canadian border to almost 7k 
feet near the Oregon border. The models have been too cool across 
most of the forecast area lately and not sure this trend will end 
anytime soon. The models have unquestionable snow for most of the 
Cascades at the onset of the event on Saturday morning as they 
have surface temps in the lower to middle 20s. We think that's 
too cold but is it 10 degrees too cold? That is not likely the 
case, however even if they are 5 degrees too cold it won't take 
much warming to make accumulating snow tough to come by. If the 
precipitation rates are high enough that can be overcome though. 
So locations such as the Methow Valley could very well see 
moderate to heavy snows through at least early Saturday evening 
with moderate amounts possible. Farther south at Leavenworth and 
plain there would be a much tougher time as the temperatures 
should be a little bit warmer. The critical thing could be how 
cool will temperatures get on Friday night/early Saturday. When 
we know that answer we could issue the appropriate weather 
highlights, if any. For now we will address via weather stories. 
Meanwhile our confidence is growing that locations that have an 
easier time of mixing with a dynamic warm fronts, such as the 
Waterville Plateau or Okanogan Valley, will see much less snow. 
Even valleys near the Canadian border may not see much snow. So 
this looks like it will mainly be a mountain event...with some of 
the Cascade elevations above 4000 feet seeing up to 2 feet of 
snow by Sunday afternoon. We expect to initially see snow over 
the major passes on Saturday but there should be a changeover 
sometime during the day. Again it looks like snow and 
precipitation rates will steadily decline on Sunday night/Monday. 

*Winds and temperatures...this will be a very strong system with 
850 mb winds climbing into the 40-50 kt range. Whether or not 
these fully mix down to the ground isn't certain. Cold fronts are 
much more efficient at this downward mixing. Meanwhile the 
surface pressure gradient isn't all that impressive on Sunday or 
Monday, which is when we'd expect the strongest winds. So this 
leads US to think it could be breezy on Sunday and Monday but 
nothing extraordinary. Meanwhile temperatures will be unusually 
warm once again. Highs on Sunday will be in the mid 40s to mid 
50s over much of the region...with cooler temperatures near the 
Canadian border and Cascades. Monday will be a little 
cooler...but not by much. So whatever snow falls on Saturday over 
valley locations will have a good chance of melting, at least 
part of it especially considering nighttime lows will be above 
freezing as well. Fx 

Monday night through thursday: a change in the large scale pattern 
weather pattern is almost certain during this time-frame. For 
several days, models continue to indicate a transition from mild 
and wet weather toward drier and cooler. How fast this transition 
occurs carries moderate to high uncertainty. Consequently, this 
will have moderate ramifications on precipitation chances, 
amounts, and type largely within the Monday night to Wednesday 
time-frame. The atmospheric river or plume of subtropical moisture 
starts off over the region Monday night night and sags southward 
Tuesday into Tuesday night as yet another trof of low pressure 
suppresses the large scale ridge in place. Generally, speaking 
most valleys will continue to experience rain with mid to High 
Mountain snows given the origins of the moisture tap and 
accompanying 850mb temperatures between -1 and 4c. Some models 
indicate a weaker wave ahead of the main trof...and these features 
will bring some fluctuations to mountain snow levels and potential 
for wintry impacts on the mountain passes. The potential for any 
valley snow will arrive during the Tuesday night into Wednesday 
time-frame (christmas eve) as the ridge finally gives way to 
northwest flow and a stronger shortwave trof. This will allow much 
cooler air (not Arctic by any means) to move back into the region 
accompanied by 850mb temps of -1 to -4c. Generally speaking, the 
deeper moisture will be shoved southward and the cooler air will 
be drier however, there is a good chance that the cooler air 
clashes with the moisture and leads to a period of lower elevation 
snowfall. Model trends continue to push this heavier band south 
and south each run suggesting the best chances near the blue mtns, 
Camas Prairie, lower Idaho Panhandle, and perhaps the Palouse...but I 
think there is enough uncertainty at this time to completely rule 
out the potential for some smaller scale bands to pass through 
just about any valley location as the air masses change. What is a 
strong possibility is snow on the mountain passes, a period of 
gusty winds, and transition back to seasonal temperatures. We will 
continue to update you on the potential for valley snow as 
confidence increases during this busy Holiday period. /Sb 


18z tafs: a saturated boundary layer north and west of kpuw will 
result in widespread IFR/MVFR stratus over the Columbia Basin, 
Spokane/Coeur D'Alene area extending north to the Canadian border 
and west into the Cascade crest. The stratus should lift a bit 
into the afternoon per forecast soundings. A drier boundary layer 
over kpuw/klws will lead to continued VFR conditions. The next 
weather system will spread -ra across the taf sites overnight into 
Friday morning with a mix of IFR and MVFR conditions. Jw 


Preliminary point temps/pops... 
Spokane 36 41 33 40 38 45 / 70 100 10 90 90 60 
Coeur D'Alene 35 40 33 38 35 43 / 50 100 20 90 90 70 
Pullman 37 43 34 40 39 48 / 70 100 10 90 90 80 
Lewiston 38 47 34 44 42 51 / 40 70 10 80 100 70 
Colville 35 40 33 37 35 41 / 100 100 20 100 90 70 
Sandpoint 33 38 32 37 34 39 / 50 100 30 80 90 80 
Kellogg 33 37 31 37 34 40 / 40 100 40 70 100 100 
Moses Lake 37 45 34 40 39 47 / 90 50 10 90 60 30 
Wenatchee 35 43 32 36 36 43 / 80 30 10 90 70 40 
Omak 35 39 30 34 34 38 / 100 80 10 90 80 30 


Otx watches/warnings/advisories... 
Washington...air stagnation advisory until noon PST Friday for east slopes 
northern Cascades-Moses Lake area-northeast mountains- 
Okanogan Highlands-Okanogan Valley-upper Columbia Basin- 
Waterville Plateau-Wenatchee area. 



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