Tuesday, January21, 2020
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Marine Weather and Tides
Athol, ID

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:24AMSunset 4:32PM Tuesday January 21, 2020 6:11 AM PST (14:11 UTC) Moonrise 5:52AMMoonset 2:37PM Illumination 14% Phase: Waning Crescent; Moon at 26 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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7 Day Forecast for Marine Location Near Athol city, ID
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location: 47.98, -116.56     debug


Area Discussion for - Spokane, WA
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FXUS66 KOTX 211214 AFDOTX

Area Forecast Discussion National Weather Service Spokane WA 414 AM PST Tue Jan 21 2020

SYNOPSIS.

Our next opportunity for widespread precipitation will begin this morning with a mix of rain and snow in the lowlands and light to moderate snow accumulations in the mountains. A threat of freezing rain is also expected across portions of the basin this morning. Another wet and mild storm system impacts the region late Wednesday through Friday bringing moderate to heavy precipitaiton. Heavy snow will be possible in the Cascades. The weekend will remain mild for mid January but with unsettled conditions increasing into early next week.

DISCUSSION.

. Moderate snow going over Stevens Pass today and light freezing rain in portions of the basin for this morning .

Today through Tuesday night: An occluded front is beginning to move into coastal Washington early this morning with radar showing a swath of precipitation moving this way. The tricky part with this forecast is the precipitation type across the western portion of the basin. There is moderate to high confidence for freezing rain primarily west of Davenport on Highway 2 and southward down to Odessa, Moses Lake, Royal City and into Quincy. Surface temperatures across this area looks to remain at or below freezing through much of this morning. That swath of precipitation along the front is just beginning to move into the Cascades at 2:30. The prognoses is for precipitation to begin over the western basin between 6:00-8:00 AM. Locations further east of this freezing rain threat looks to warm up above freezing by the time precipitation gets going. There is more uncertainty around the Spokane Area and into the mountain valleys just to the north of Spokane where a wintry mix is possible, but probably will get going late enough in the morning that ice/snow accumulation should be minor. Thats not to say that roadways won't be a bit slick this morning with freezing fog across the Spokane Area and into the Northeast Mountains and Northern Panhandle. Confidence is high that snow will be the predominant precipitation type in the lee of the Cascades. However, can't rule out a short duration of freezing rain in the Wenatchee Area, Waterville Plateau and southern portions of the Okanogan Valley before temperature profiles wetbulb below freezing and change over to snow. I did not change snow accumulations much across the east slopes of the Cascades with moderate snow accumulations still expected near the crest. The current winter weather advisory for this area still looks good with up to around a foot of snow possible west of Coles Corner to Stevens Pass. I will also be adding the Moses Lake Area and the Upper Columbia Basin north of Odessa, including the Highway 2, to this advisory for the threat of freezing rain. The freezing rain threat is only for the morning hours.

Snow showers will continue along the Cascade crest and into the Idaho Panhandle in moist westerly flow. Lapse will steepen which should result in heavier snowfall rates up along the Cascade crest. That slop over is expected to result in continued snow accumulation in places like Mazama, Stehekin and Plain. There will also be a better chance for accumulating snow Tuesday night over Lookout Pass with 2-4 inches possible as those temperatures cool off. /SVH

Wednesday night through Friday: Expect wet and mild weather as an atmospheric river takes aim on the Pacific NW with good tap of subtropical Pacific moisture. The region will experience gradual warming seeing in the rise of temperatures and snow levels and the precipitation changing from snow to a rain/snow mix to rain across the lowlands. With low level southeast flow, there is a concern that the cold air will be slow to depart from the Cascade valleys and parts of north central WA, which may give way to pockets of freezing rain late Wednesday night into Thursday morning as the warm moves in aloft. By Thursday afternoon, the Inland NW will be well entrenched in the warm sector as snow levels peak at 4-6K ft under good isentropic lift. The best area for accumulating snow will be found in the higher peaks near the Cascade crest where the potential for heavy snow continues. Other concerns with this warming will be snowmelt and possibility of lowland flooding. The arrival of a shortwave Friday brings a break for the precipitation and flattens the flow aloft with slight cooling across the region.

Friday night through Monday: The passage of the shortwave will bring a brief break in precipitation Friday. A series of weather disturbances line up across the Pacific and take aim on the region. The confidence with the timing of these features is lacking but confidence looks good that the unsettled pattern that will continue through the weekend and into early next week. The medium range deterministic models show the possibility of a weather disturbance arriving each day with a round of mountain snow and a rain snow mix or rain in the lowlands. The 8-14 day outlook keeps the Inland NW under a mild and unsettled pattern until the end of the month. /rfox

AVIATION.

12Z TAFS:

FREEZING EXPECTED AT KMWH THIS MORNING AND POSSIBLE FOR AIRFIELDS FROM SPOKANE (KGEG) TO WILBUR ALONG THE HIGHWAY 2 CORRIDOR

A mix precipitation event is expected for the morning into the early afternoon as an occluded front moves into the area. There is moderate to high confidence for a 2-4 hour period of light freezing rain at KMWH between 15-19Z. Precipitation will hold off until around 18Z for the Spokane Area and its a tougher call if temperatures will remain below freezing that late into the morning. The TAF calls for brief freezing rain at KGEG before surface temperatures warm above freezing. Felts Field (KSFF) to Coeur d'Alene (KCOE) are expected to see mostly rain. Temperature profiles should be could enough to support snow this morning from Wenatchee (KEAT) to Omak (OMK). Low stratus and snow showers with IFR conditions expected behind the front for Tuesday night across northeast Washington and into the Idaho Panhandle. /SVH

PRELIMINARY POINT TEMPS/POPS. Spokane 37 32 38 35 42 38 / 100 20 20 60 70 60 Coeur d'Alene 37 33 38 35 41 39 / 100 40 20 60 80 60 Pullman 41 32 37 34 42 37 / 90 30 30 60 70 60 Lewiston 46 34 43 39 47 39 / 60 20 20 60 60 50 Colville 35 30 39 32 42 37 / 100 20 20 60 80 70 Sandpoint 35 33 37 34 40 39 / 100 70 50 70 80 70 Kellogg 40 33 37 34 41 38 / 100 70 60 70 80 60 Moses Lake 38 30 40 34 44 37 / 90 10 40 60 60 60 Wenatchee 36 30 36 32 40 36 / 100 20 50 80 60 70 Omak 35 29 35 33 39 38 / 100 20 30 70 60 60

OTX WATCHES/WARNINGS/ADVISORIES. ID . None. WA . Winter Weather Advisory until 4 AM PST Wednesday for the cascade crest including highway 2 between coles corner and stevens pass for East Slopes Northern Cascades.

Winter Weather Advisory from 6 AM to 11 AM PST this morning for Moses Lake Area-Upper Columbia Basin.




Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Coeur d'Alene Airport - Pappy Boyington Field, ID20 mi15 minNNE 1310.00 miMostly Cloudy31°F30°F100%1013.2 hPa
Sandpoint, Sandpoint Airport, ID22 mi16 minN 05.00 miFog/Mist28°F28°F100%1010.5 hPa

Link to 5 minute data for KCOE

Wind History from COE (wind in knots)
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Last 24hrNE10NE9NE10NE9NE9NE10NE9NE8NE7NE5NE8E7E4E5NE7E5NE9NE8NE7NE11NE12NE13NE13NE13
1 day agoNE8NE8NE8NE10NE9NE7NE8NE10NE8NE9NE11NE10NE11N13NE13NE14N17N14N13NE11NE13NE9NE13NE11
2 days agoNE8NE7NE7NE7NE7NE6NE5NE5NE5--NE7NE3NE3Calm4NE7N6NE6N8NE9NE8NE7NE8NE9

Tide / Current Tables for
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Weather Map
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GEOS Local Image of PacificNorthwest    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for Spokane, WA (9,2,3,4)
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Ground Weather Radar Station Spokane, WA
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.