Friday, December6, 2019
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Marine Weather and Tides
Clark Fork, ID

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:18AMSunset 3:57PM Friday December 6, 2019 5:40 PM PST (01:40 UTC) Moonrise 2:37PMMoonset 2:06AM Illumination 76% Phase: Waxing Gibbous; Moon at 10 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 Clark Fork, ID
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location: 48.28, -116     debug


Area Discussion for - Spokane, WA
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FXUS66 KOTX 062349 AFDOTX

Area Forecast Discussion National Weather Service Spokane WA 349 PM PST Fri Dec 6 2019

SYNOPSIS. A storm system will move into the area tonight and bring widespread precipitation tonight through Saturday night. Light to moderate snow accumulations are expected in the mountains with rain in the valleys and locally very light freezing rain. Drier weather is expected Monday and Tuesday followed by chances for rain and snow Wednesday and the end of the week.


DISCUSSION. Tonight through Sunday: No big surprises to the overall pattern coming up this weekend. Per satellite a deep upper level low is slowly sagging south out around 135W. The southerly flow ahead of the low is pumping up quite a bit of moisture. Meanwhile the upper level disturbance in the Gulf of Alaska is just moving into the NW British Columbia coast. PWATS rise to between 150-200 percent of moisture. Isentropic lift with the warm front tonight and early Saturday is on the weak side through the night, but does increase in intensity around 15z Saturday morning. The region comes under the influence of the shortwave between 15-18z and this will increase the forcing over the region, but mainly across the eastern zones. As this scenario plays out it will result in a wet weekend with widespread light, and for some areas moderate precipitation. Temperatures will remain into the upper 30s to lower 40s both Saturday and Sunday and remain on the warm side of normal.

*Precipitation: Storm total precipitation will be mostly light across the western zones. While moisture is deep and plentiful, isentropic up-glide is pretty weak. In addition the western zones will miss almost all of the forcing due to the shortwave. Up- sloping flow into the Cascades will result in from 0.20-0.30 with up to a half inch near the crest. Shadowing from the Cascades will give only a few hundredths to the lower east slopes and the Columbia basin, the Methow valley and the Okanogan valley. East of a line from about Colville to Pomeroy will due better. The lower elevations will see up to a quarter inch or less. The Northeast Washington mountains and the Idaho Panhandle mountains will get from a half inch to an inch and for some places more than an inch.

*Precipitation type: Some light freezing rain will be possible late tonight through Saturday morning, but with the temperatures profiles that we are seeing the confidence is low that this will verify. If we do get freezing rain it will be for portions of the upper Wenatchee valley, The Waterville plateau, the western Columbia basin and along the Columbia river up around Pateros, Brewster and Bridgeport. Any accumulations would be quite light with 0.01-0.02 at best. Snow levels will be 4000-5000 feet south of Highway 2 and will bounce between 3000-4000 feet north of highway 2. So the precipitation will be mainly rain for the lower elevations and snow for the mountains above 3500 feet. Snow accumulations for the Cascades will be 3-5 inches and mainly above pass level. Snow amounts will be higher for the Northeast Mountains and the Panhandle mountains. At the higher elevations of the Selkirk and Cabinet mountains 6-10 inches will be possible and for the St Joe and Clearwater mountains 8-12 inches will be possible. Amounts 3-6 inches will be possible for Lookout Pass Saturday afternoon through Sunday morning. With this in mind, a Winter Weather Advisory will be issued for Idaho Zone 4 or Shoshone county. Tobin

Monday and Tuesday: A ridge building along the coast is expected to be cool and dry for the rest of the period. There is concern for some air quality degradation but weak inversions will allow for some mixing near the surface and any decrease in quality is expected to be short lived. Early morning patchy fog is expected in the valleys and some low lying portions across the basin. Highs are expected to be in the 30s. Lows will be in the range of low 30s to mid 20s.

Wednesday and Friday: The ridge breaks down on Wednesday morning and a series of shortwave troughs push west to east through the region. Model agreement at this time is low as the GFS is bringing it through the Inland Northwest by Wednesday AM. Models are coming in line with the timing as this is expected to be a Thursday morning event with the heaviest precip being in the Cascades and the Idaho Panhandle. The rain shadow effect of a west to east wave keeps the amounts lower across the Columbia Basin. If it comes in the early AM like the GFS, it could bring some light snow to the Columbia Basin. The later timing hints at more of a rain event. Precip is expected to linger through Friday and into the weekend. Highs will be mainly in the 30s for most of the region. Lows will be in the low 30s to upper 20s. /JDC

AVIATION. 00Z TAFS: A warm front moves in ahead a strong offshore low. Some low stratus/fog is possible in advance of the precipitation, but confidence is low. Expect MVFR/IFR conditions over EAT, with the threat of -ra developing after 06-09Z. The clouds will lower across MWH-GEG-SFF-COE-PUW-LWS later this evening into the overnight, with -ra developing overnight into Saturday. There is some risk of -FZRA in the vcnty of EAT/MWH between about 06-18Z, but the risk is low, with only with traces to a hundreths of inch, if any occurs at all. /Cote'


PRELIMINARY POINT TEMPS/POPS. Spokane 33 41 32 38 26 36 / 40 70 40 0 0 0 Coeur d'Alene 34 41 33 38 27 36 / 30 80 60 10 0 0 Pullman 34 44 35 40 29 40 / 30 70 50 20 0 0 Lewiston 35 46 38 44 32 43 / 30 60 50 30 0 0 Colville 32 40 30 38 21 36 / 50 80 30 0 0 0 Sandpoint 33 39 34 38 26 35 / 50 90 70 10 0 0 Kellogg 33 40 35 38 29 36 / 20 90 80 30 0 0 Moses Lake 33 42 29 43 26 39 / 40 50 20 0 0 0 Wenatchee 32 40 32 42 28 37 / 60 50 10 0 0 0 Omak 34 39 30 40 25 36 / 40 60 10 0 0 0

OTX WATCHES/WARNINGS/ADVISORIES. ID . Winter Weather Advisory from noon Saturday to 10 AM PST Sunday above 4000 feet for Central Panhandle Mountains.

WA . None.




Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sandpoint, Sandpoint Airport, ID30 mi45 minN 01.00 miFog/Mist36°F35°F100%1016.3 hPa

Link to 5 minute data for KSZT

Wind History from SZT (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS4CalmCalmCalmCalmCalmCalm
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNE4CalmCalmCalmNE5CalmCalmCalm
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS3S4SW3S6S4S5S4S5S5CalmS4CalmCalm

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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wmap_P
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Spokane, WA (20,4,5,8)
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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 numerious 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.