Friday, July3, 2020
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Marine Weather and Tides
Manson, WA

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 5:08AMSunset 9:02PM Friday July 3, 2020 8:06 PM PDT (03:06 UTC) Moonrise 7:01PMMoonset 2:39AM Illumination 98% Phase: Waxing Gibbous; Moon at 13 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 Manson, WA
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location: 47.88, -120.08     debug


Area Discussion for - Spokane, WA
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FXUS66 KOTX 032307 AFDOTX

Area Forecast Discussion National Weather Service Spokane WA 407 PM PDT Fri Jul 3 2020

SYNOPSIS. The holiday weekend will see temperatures near normal for early July and dry for much of the Inland Northwest. A weak front on Independence Day will bring passing high clouds with filtered sunshine and a light afternoon breezy. Showery conditions return Monday evening and linger into the middle of next week as temperatures hover near seasonal levels.

DISCUSSION. Tonight through Independence Day: A closed low pressure system sits spinning over southwestern BC this afternoon. The trough will spend the next 12 hours stretching out and weakening. There is some weak mid level instability along an axis from northeast Oregon into the Central Panhandle Mountains where high based showers are expected to develop late this evening into the overnight hours. A lack of forcing and instability should limit the amount of precipitation that falls from these cells, but cannot completely rule out lightning as well. It's also possible that only some Altocumulus Castellanus (ACCAS) cloud cover will be observed with virga falling from their base. The mid level front will push across in the morning, but little in the way of a surface reflection will occur with minimal cold air advection resulting in a weak pressure gradient. Temperatures will be slightly cooler on Independence Day compared to today and slightly breezy across open areas of the basin. Showers will be confined to the far northern mountains near the Canadian border where 500 mb temps will only cool to around 18.5 Celsius with the cold pool aloft.

Saturday night through Monday night: The weather will remain benign into early next week. temperatures will hover right around normal for early July with highs in the upper 70s and 80s. Sunny skies for the most part as well. Clouds will begin to thicken over the Cascades Monday afternoon with the arrival of another weak shortwave disturbance. /SVH

Monday through Friday: Deterministic and ensemble model solutions are in good agreement that a long wave trough will remain positioned over the Pac NW through next week. This will equate to another week of near to below normal temperatures, locally breezy winds, and at times . showers & thunderstorms. The main precipitation threat over the course of the week will be focused in two areas. The first will be across the northern mountains including the North Cascades, Okanogan Highlands, and North Idaho. The second will be across the far southeast around the Camas Prairie . L-C Valley . and Blue Mtns; at times, this southern threat could expand as far north as Pullman and Kellogg.

Our first threat for showers and weak thunderstorms will arrive Monday afternoon into Monday evening with the passage of a shortwave. The shortwave will lift east of the region Tuesday but leave an upper-level cold pool in its wake. The cool air aloft combined with afternoon heating will promote hit or miss showers and a few thunderstorms for Tuesday afternoon and early evening. The highest risk for showers will be over the northern mountains but I think we will see some of this activity expand further southward toward Wilbur . Davenport . and Spokane in the afternoon and early evening. The cold pool will moderate on Wednesday reducing our instability and shower potential. Models are struggling with the details of the next shortwave within the Thursday-Friday time-frame so forecast leans heavily toward the ensemble means which would once again favor the mountains for the highest risk for showers . yet this has potential to change as this late week system gets dialed in.

We do not anticipate strong winds this week. However, breezy conditions will be possible through the Cascade Gaps and across the Columbia Basin with each passing wave. This includes Monday- Tuesday and again Thursday-Friday. Speeds will generally be in the 10-20 mph range. The warmest temperatures of the week will be Monday with afternoon highs topping out in the upper 70s ( N Mtns) to upper 80s (Lower Basin). The air mass cools 4-6 degrees for Tuesday and Wednesday with highs falling back into the lower 70s to lower 80s. Trends will begin warming again for late week back closer to our seasonal numbers. Pretty remarkable thing is the fact that we see little to no 90s anywhere in our forecast area through the entire period. /sb

AVIATION. 00z TAFS: A closed low pressure circulation will spin over southwestern BC into the overnight hours. Airfields near the Cascades, such as KEAT, KOMK, KEPH and KMWH, will see thickening high clouds through the evening. There is an axis of mid level instability extending from northeast Oregon into the Central Panhandle Mountains. The incoming front tonight will interact with this instability producing high based showers into KPUW and KLWS beginning around mid evening and continuing into tonight. Showers look to be weak with an outside chance for thunderstorm development. Showers with the upper trough tomorrow will be confined near the Canadian border. /SVH

PRELIMINARY POINT TEMPS/POPS. Spokane 50 76 50 79 52 82 / 0 0 0 0 0 0 Coeur d'Alene 51 74 52 77 52 80 / 0 0 0 0 0 0 Pullman 49 73 48 76 49 79 / 10 0 0 0 0 0 Lewiston 58 81 56 83 57 85 / 20 0 0 0 0 0 Colville 49 78 51 81 50 83 / 0 10 0 0 0 0 Sandpoint 51 75 46 77 49 80 / 0 0 0 0 0 0 Kellogg 53 73 51 75 51 79 / 20 10 0 0 0 0 Moses Lake 53 83 51 85 55 88 / 0 0 0 0 0 0 Wenatchee 56 81 56 85 59 85 / 0 0 0 0 0 0 Omak 53 80 54 83 57 85 / 0 10 0 0 0 20

OTX WATCHES/WARNINGS/ADVISORIES. ID . None. WA . None.




Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Wenatchee - Pangborn Memorial Airport, WA33 mi71 minWNW 1510.00 miFair73°F42°F33%1014.7 hPa

Link to 5 minute data for KEAT

Wind History from EAT (wind in knots)
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Last 24hrNW12NW11NW9NW10NW11NW12NW11NW10NW6W6W7W5W8W9W6W45--W16NW13
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1 day agoNW15NW11NW9NW10NW9NW10NW9NW8NW8N6NW8NW12NW12W9--S84NW11
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Tide / Current Tables for
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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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Spokane, WA (23,6,7,8)
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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 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.