Chewelah, Washington Weather Conditions

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Air Stagnation Advisory View All Alerts

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Current Conditions

  • 34°
  • Overcast
  • Wind: ENE 4 mph
  • Humidity: 96%
  • Visibility: 8.0 miles
  • Dew Point: 33°
  • Pressure: 30.37 in. -
  • Heat Index: 31

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Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Thursday
  • Overcast
  • High: 42 °
  • Low: 36 °
  • Overcast
  • Friday
  • Chance of Rain
  • High: 44 °
  • Low: 35 °
  • Chance of Rain
  • Saturday
  • Overcast
  • High: 44 °
  • Low: 35 °
  • Overcast
  • Sunday
  • Chance of Rain
  • High: 44 °
  • Low: 39 °
  • Chance of Rain
  • Monday
  • Chance of Rain
  • High: 51 °
  • Low: 41 °
  • Chance of Rain

Forecast for Chewelah, Washington

Updated: 3:54 am PST on February 11, 2016

Air stagnation advisory in effect until 10 am PST Saturday...
  • Today

    Mostly cloudy. Patchy fog in the morning. A 20 percent chance of sprinkles and High Mountain snow in the afternoon. Snow level 4500 feet. Highs in the lower 40s.

  • Tonight

    Rain. Lows in the lower to mid 30s. Chance of precipitation 90 percent. Rainfall amounts between a tenth and a quarter of an inch possible.

  • Friday

    Rain in the morning...then rain showers likely in the afternoon. Highs in the lower to mid 40s. Chance of precipitation 80 percent. Rainfall amounts around a tenth of an inch.

  • Friday Night

    Cloudy. A chance of rain in the evening...then a chance of rain and mountain snow overnight. Snow level 4500 feet. Lows in the lower to mid 30s. Chance of precipitation 50 percent.

  • Saturday

    Mostly cloudy with a 50 percent chance of rain or snow showers. Snow level 3500 feet. Highs in the lower to mid 40s.

  • Saturday Night

    Rain or snow likely. Lows in the lower to mid 30s. Chance of precipitation 70 percent.

  • Sunday and Sunday Night

    Mostly cloudy with a 50 percent chance of rain or snow. Highs in the lower to mid 40s. Lows in the mid to upper 30s.

  • Washingtons Birthday through Tuesday Night

    Cloudy with a 50 percent chance of rain. Highs in the mid 40s to mid 50s. Lows in the mid 30s to lower 40s.

  • Wednesday

    Mostly cloudy with a 50 percent chance of rain and mountain snow. Highs in the mid to upper 40s.

Severe Weather Alert Descriptions

 Air Stagnation Advisory  Statement as of 1:30 PM PST on February 10, 2016

... Air stagnation advisory remains in effect until 10 am PST

* air quality... light winds and a temperature inversion will
heighten the potential for elevated pollution levels in central
Washington and northeast Washington tonight through Saturday
morning. Weak weather disturbances will pass through the area
starting tonight and may slightly improve the situation...
however a stronger cold front passage Saturday is expected to
end the stagnant conditions which is why the air stagnation
advisory is in effect until 10 am PST Saturday.

* Impacts... burn bans may be in effect for your area. Please
consult your state or tribal authorities before burning.

* Locations... a few communities included in the air stagnation
advisory are... Ritzville... Moses Lake... Grand Coulee...
Colville... Omak... Winthrop... Wenatchee... and Leavenworth.

Precautionary/preparedness actions...

An air stagnation advisory indicates that due to limited movement
of an airmass 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: 405 E. Lincoln, Chewelah, WA

Updated: 4:49 AM PST

Temperature: 32.3 °F Dew Point: 32 °F Humidity: 97% Wind: Calm Pressure: 30.38 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: Dry Creek, Chewelah, WA

Updated: 4:51 AM PST

Temperature: 30.7 °F Dew Point: 30 °F Humidity: 99% Wind: Calm Pressure: 28.36 in Hourly Precipitation: - Windchill: 31 °F Graphs

Location: Hunters, Hunters, WA

Updated: 4:42 AM PST

Temperature: 33.6 °F Dew Point: 33 °F Humidity: 99% Wind: North at - Pressure: 30.30 in Hourly Precipitation: - Windchill: 34 °F Graphs

Location: APRSWXNET, Clayton, WA

Updated: 4:27 AM PST

Temperature: 32 °F Dew Point: 30 °F Humidity: 93% Wind: Calm Pressure: 30.27 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: Waterloo, Rice, WA

Updated: 4:51 AM PST

Temperature: 31.1 °F Dew Point: 30 °F Humidity: 95% Wind: Calm Pressure: 27.79 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: Cedar Loop, Colville, WA

Updated: 4:47 AM PST

Temperature: 32.0 °F Dew Point: 32 °F Humidity: 99% Wind: Calm Pressure: 30.25 in Hourly Precipitation: - Windchill: 32 °F Graphs

Location: RAWS, Cusick, WA

Updated: 3:55 AM PST

Temperature: 29 °F Dew Point: - Humidity: - Wind: East at 1 mph Pressure: 30.32 in Hourly Precipitation: 0.00 in Windchill: 29 °F Graphs

Location: 10th Avenue Colville, Colville, WA

Updated: 4:51 AM PST

Temperature: 33.4 °F Dew Point: 30 °F Humidity: 87% Wind: Calm Pressure: 30.40 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: Colville Mountain, Colville, WA

Updated: 4:51 AM PST

Temperature: 33.4 °F Dew Point: 32 °F Humidity: 95% Wind: Calm Pressure: 30.37 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: Colville Compound, Colville, WA

Updated: 4:51 AM PST

Temperature: 33.4 °F Dew Point: 30 °F Humidity: 86% Wind: Calm Pressure: 30.41 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: Fertile Valley, Newport, WA

Updated: 4:51 AM PST

Temperature: 33.8 °F Dew Point: 32 °F Humidity: 94% Wind: East at 1.0 mph Pressure: 30.36 in Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

Location: Kettle Falls, WA, Kettle Falls, WA

Updated: 4:49 AM PST

Temperature: 33.4 °F Dew Point: 33 °F Humidity: 97% Wind: West at 2.0 mph Pressure: 30.27 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: APRSWXNET, Rice, WA

Updated: 4:26 AM PST

Temperature: 35 °F Dew Point: 34 °F Humidity: 98% Wind: Calm Pressure: 30.23 in Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

Location: McGowen Road, Newport, WA

Updated: 4:46 AM PST

Temperature: 68.9 °F Dew Point: 48 °F Humidity: 46% Wind: North at - Pressure: 30.60 in Hourly Precipitation: - Windchill: - Graphs

Location: Orin-Rice & South Basin, Colville, WA

Updated: 4:38 AM PST

Temperature: 32.4 °F Dew Point: 32 °F Humidity: 99% Wind: Calm Pressure: 30.24 in Hourly Precipitation: - Windchill: 32 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion

Area forecast discussion 
National Weather Service Spokane Washington 
417 am PST Thursday Feb 11 2016 

a warm front will move across the inland northwest today and 
tonight spreading a chance of rain across much of the area with 
snow levels at the highest mountain elevation except near the 
north Cascades. This front will be followed by the passage of a 
cold front on Friday which will bring another chance of 
precipitation to much of the area as well as slightly lower snow 
levels. Unsettled weather will continue through the weekend into 
early next week with valley rain, High Mountain snow and breezy 
winds expected. Temperatures will be quite mild on Monday with 
many locations seeing highs in the mid 50s to low 60s. 


today and tonight...the weather during this period will generally 
revolve around a developing warm front. As of 2am, the water vapor 
looper was showing a broad swath of moisture oriented from north-northeast-south-southwest 
right off the coast. Meanwhile the upper level ridge of high 
pressure remains poised over the inland northwest. The ridge is expected 
to amplify slightly over the area today and tonight, as height 
falls continue develop off the coast. Despite the presence of the 
ridge we should see the first chance of precipitation this week, 
the question is how soon will it develop and what will most of it 
fall as. Looking closely at the latest radar mosaics it appears 
the front will come through in two swaths. The first was 
responsible for the east-west band of light echoes extending along 
the Washington/or border and moving slowly northeastward. This one will 
likely weaken as it moves farther northward with weakening 
isentropic ascent, especially over the eastern third of Washington 
and north Idaho. If anything falls out of this band it will likely 
be very light. Over central Washington, the chances for measurable 
precipitation are a little better due to slightly deeper moisture 
combined with weak upslope flow into the Cascades. We suspect most 
of the precipitation will fall as rain, however north of Lake 
Chelan current wet-bulb temperatures are below freezing and they 
may not climb much this morning. So we expect to see primarily 
snow. The second surge of precipitation will bring a much better 
chance of measurable precipitation. This wave is likely a 
reflection of a compact shortwave located over northern California 
moving steadily northward. The hrrr suggests this second band will 
track into the Wenatchee and Moses Lake area around midday and 
then into NE Washington and north Idaho by late afternoon or early 
evening. Snow levels climb steadily with this portion of the warm 
front. Wet-bulb zero heights reach 6000 feet or higher across the 
entire forecast area save a small portion of the north Cascades 
mainly impacting the Methow Valley. It's a tough call as to how 
effective the cold air damming will be in this area as the 
surrounding air mass is awfully warm. The 850 mb flow maintains a 
weak upslope orientation at least through early Friday which is 
favorable for keeping snow levels locally down to the valley 
floor, however surface temperature per BUFKIT profiles hover near 
or slightly above freezing. We put several inches of snow in the 
forecast across the upper Methow Valley however that's assuming 
any snow which falls is able to accumulate rather than melting as 
it falls. Confidence is not high due to the precarious temperature 
profiles. Elsewhere we are much more confident about primarily a 
rain event. Rainfall totals should range from .15-35 inches across 
the northern mountains and extending into the northern Idaho 
Panhandle, with lighter amounts across southern Washington and the 
central Panhandle. Near the Cascades, precipitation amounts could 
range from 0.30-0.70 inches. 

For Friday, the ridge finally gives way and a SW-NE oriented upper 
level jet pokes into the southern portions of the region by 
midday. This will turn the steady warm frontal precipitation to 
more of a showery regime with most of the precipitation occurring 
near the cold front. The cold front will likely end the 
precipitation threat in the Lee of the Cascades during the morning 
hours as the upslope flow turns to a downslope westerly regime. 
Meanwhile we expect the shower coverage to increase over the 
eastern third of Washington and over the Panhandle during the 
afternoon as the front destabilizes the atmosphere and enhances 
any orographic ascent. Generally speaking the precipitation 
amounts from the cold front will be lighter than whats produced 
from the warm front. 

Temperatures will remain milder both days 
over the eastern third of Washington and the Idaho Panhandle with 
highs in the 40s to middle 50s. Cooler temperatures will remain a 
fixture over central Washington today due to the cold air damming 
with highs in the 30s to lower 40s. The cold front should enhance 
mixing on Friday bringing an end to the inversions with highs 
climbing into the upper 30s to middle 40s. Fx 

Friday night through Wednesday...a mild and unsettled weather 
pattern is expected this weekend through at least the middle of 
next week. Initially a slightly cooler air mass will move in 
Friday night and Saturday as an upper trough passes through. Mid 
level westerly flow will favor most of these showers for the 
Cascade crest and Idaho Panhandle. Snow levels by Saturday 
morning lower to 3000-4000 feet with snow showers expected over 
the mountain passes. Then an atmospheric river of subtropical 
moisture becomes aimed at the area Saturday night into Sunday. 
This will bring more rain and snow with snow levels rapidly rising 
from 2500-4000 feet initially early Sunday to 6000-7000 feet 
Monday as a warm front passes through. The atmospheric river 
begins to lift north Sunday night into Monday to near or just 
north of the Canadian border by Monday afternoon. Strong mid 
level westerly flow throughout this event will favor moderate to 
heavy precipitation for the Cascade crest and in the mountains of 
the Idaho Panhandle with added orographic lift...with mainly 
light amounts over central and eastern Washington as a strong rain 
shadow develops. Meanwhile Monday into Tuesday a surface low 
tracking into southern British Columbia will result in a strengthening south- 
southwest winds which combined with the warmer air mass will lead 
to increased snow melt for areas that have snow currently. 850mb 
winds increasing to 30-45 kts will likely result in breezy to 
windy conditions over the region...especially the upper Columbia 
Basin, Spokane area, and Palouse. Jw 



12z tafs: upper level ridge remains fixed over the inland northwest during 
this period while a warm front will bring an increasing threat of 
rain to most of the taf sites. Before the front arrives we are 
dealing with yet another round of fog. It's very difficult to tell 
how widespread it is since the low clouds are being shielded by high 
clouds above. As of 4am, most of the LIFR/IFR fog was around geg and 
fafb but low dewpoint depressions suggest it could easily develop at 
Coe sff and mwh as well. Confidence is low though so we will 
generally mention partial fog and the possibility of rapidly 
changing visibilities. By 18z or so the fog threat will decrease for 
all sites with VFR conditions generally prevailing at all sites. The 
threat of rain will then develop by late afternoon or early evening. 
Persistent rain is then expected overnight at all sites except puw 
and lws. Cigs will gradually fall and MVFR conditions will likely 
develop. Fx 


Preliminary point temps/pops... 
Spokane 45 38 47 34 45 35 / 10 60 70 50 40 60 
Coeur D'Alene 46 37 47 36 45 34 / 10 70 70 70 60 70 
Pullman 51 40 52 38 47 36 / 20 30 40 60 40 70 
Lewiston 55 44 57 41 54 40 / 10 20 30 50 30 60 
Colville 40 34 41 33 43 35 / 10 80 80 50 50 60 
Sandpoint 41 35 41 34 42 34 / 10 80 80 90 60 70 
Kellogg 42 37 43 35 39 33 / 10 70 60 90 80 90 
Moses Lake 46 38 49 34 52 38 / 20 50 40 30 10 40 
Wenatchee 39 34 44 33 47 35 / 50 80 50 20 10 50 
Omak 38 35 37 30 42 33 / 30 90 70 30 20 40 


Otx watches/warnings/advisories... 
Washington...air stagnation advisory until 10 am PST Saturday 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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Air Pollution Forecast for Spokane

Current Air Quality: Good Pollutant: PM10
Thu Air Quality: Moderate Pollutant: PM10
Thu Air Quality: Good Pollutant: CO

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