Saturday, February27, 2021
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Marine Weather and Tides
Lewiston, ID

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:28AMSunset 5:32PM Saturday February 27, 2021 1:31 AM PST (09:31 UTC) Moonrise 7:09PMMoonset 8:10AM Illumination 100% Phase: Full Moon; Moon at 15 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 Lewiston, ID
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location: 46.39, -116.98     debug


Area Discussion for - Spokane, WA
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FXUS66 KOTX 270555 AFDOTX

Area Forecast Discussion National Weather Service Spokane WA 955 PM PST Fri Feb 26 2021

SYNOPSIS. We still have some winter weather in the form of light snow to move through tonight into midday Saturday. The mountains and higher terrain will see some heavier snow. Quiet and somewhat warmer conditions are expected Sunday into the beginning of next week however there could be some increasing clouds and mountain snow returning again toward the middle of next week.

DISCUSSION. Light snow coverage is being re-energized in east Washington and north Idaho as a low circulation in northwest flow moves south and east through the area. The air has dried quite a bit since earlier today so we expect mainly light accumulations (around an inch) with this circulation as it slowly transits into the the Idaho Panhandle into early Saturday morning. The uplifting influence of the Panhandle terrain may accumulate snow a bit more along I-90 and Lookout pass as well as the higher terrain of the Camas Prairie later tonight into Saturday morning. On average these areas could see a solid 3 inches. If heavier showers track along I-90 there could be more snow. We'll have to watch to see how this sets up. Winter Weather Advisories for these areas will be up until 10 am tomorrow.

Farther west the Cascades continue to get heavy snow especially near Stevens Pass, Plain and even into Leavenworth. Latest guidance suggests bands of snow will sag south away from the Stevens pass area by midnight. The Winter Storm Warning for the area was extended until 1 am.

After this latest wave moves out and high pressure builds in Saturday afternoon, we should see much less shower coverage and drying roads finally. High pressure will keep the region mainly dry into the beginning of next week.

AVIATION. 00Z TAFS: More snow and snow showers will be developing over the area with KGEG-KSFF-KCOE-KPUW and KLWS experiencing MVFR to IFR conditions at times. The overall trend after 15Z Saturday is to push moisture out of region from west to east. KCOE-KPUW and likely KLWS will be the last aviation forecast sites to improve appreciably after 18Z Saturday. Westerly wind generally less than 15 KT is expected however some gusts nearing 20 in the afternoon can be expected at KEAT. High pressure will build into the region later Saturday into Sunday for over improvement in conditions. /TC

PRELIMINARY POINT TEMPS/POPS. Spokane 24 39 27 40 31 45 / 30 10 0 0 0 10 Coeur d'Alene 23 37 24 38 29 44 / 20 20 0 0 0 10 Pullman 25 35 23 37 27 41 / 60 60 0 10 0 10 Lewiston 30 42 27 43 30 47 / 50 50 0 0 0 0 Colville 23 41 22 41 31 44 / 10 0 10 0 0 10 Sandpoint 23 36 24 37 31 42 / 10 10 10 10 10 20 Kellogg 25 34 23 36 28 42 / 60 60 10 20 10 20 Moses Lake 27 48 30 52 34 52 / 10 0 0 0 0 0 Wenatchee 29 44 30 47 33 46 / 10 0 0 0 0 10 Omak 24 43 25 44 34 46 / 20 10 0 0 0 10

OTX WATCHES/WARNINGS/ADVISORIES. ID . Winter Weather Advisory from 1 AM to 10 AM PST Saturday for Central Panhandle Mountains.

Winter Weather Advisory from 1 AM to 10 AM PST Saturday for Lewis and Southern Nez Perce Counties.

WA . Winter Storm Warning until 1 AM PST Saturday for East Slopes Northern Cascades.

Winter Storm Warning until 10 AM PST Saturday for Northeast Blue Mountains.




Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lewiston, Lewiston-Nez Perce County Airport, ID2 mi35 minS 410.00 miOvercast37°F28°F70%1011.9 hPa

Link to 5 minute data for KLWS

Wind History from LWS (wind in knots)
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Last 24hr4SW11SW17
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1 day agoE9N4CalmSW4S12S14
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2 days agoW5SE3CalmE7E5CalmSE4CalmE5CalmSE3CalmCalmCalmE4E4E4E5CalmCalmE4E7E6E7

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: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
Link to Loop

Other links: GEOS-West     Contential US     Full GOES-East
Ground Weather Radar Station




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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.