Tuesday, December10, 2019
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Marine Weather and Tides
Moscow, 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 4:01PM Monday December 9, 2019 9:54 PM PST (05:54 UTC) Moonrise 3:50PMMoonset 5:24AM Illumination 97% 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 Moscow, ID
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location: 46.73, -117     debug


Area Discussion for - Spokane, WA
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FXUS66 KOTX 100548 AFDOTX

Area Forecast Discussion National Weather Service Spokane WA 948 PM PST Mon Dec 9 2019

SYNOPSIS. Fog and low clouds will continue through Tuesday under high pressure. A weak weather disturbance arrives Tuesday night into Wednesday, with light snow for most. It could make some a slick commute Wednesday morning. Wetter, milder conditions are expected Thursday into Friday with rain and mountain snow.

DISCUSSION. Tonight through Tuesday: An amplified upper ridge and surface area of high pressure remain over the Inland NW for 24 hours, bringing stable and dry conditions with light winds. Despite a veil of high clouds over the region, the abundance of boundary layer moisture has developed into a stationary low cloud deck that spans the Columbia Basin into the Spokane area. Despite some shrinking in coverage and lifting of the cloud deck this afternoon, anticipate it to expand again overnight into Tuesday morning with more freezing fog returning. The cloud deck should limit the diurnal range in temperatures below it, as they waffle a few degrees around the freezing mark. Model soundings show this low cloud deck and inversions deepening late tonight into Tuesday morning which may limit the coverage of dense fog and poor visibilities by Tuesday morning. Plenty of cloud cover will remain for Tuesday as mid and high level clouds increase by afternoon.

Tuesday night into Wednesday: The upper ridge gives way to a Pacific shortwave trough that sweeps across the region with a weak surface front and a band of precipitation. This wave will help set the stage for the upcoming unsettled weather and should limit the threat of fog by Tuesday night. With low snow levels and most surface temperatures below freezing, anticipate the predominant precipitation type to be snow. A rain/snow mix is possible in the Wenatchee area and the LC Valley Tuesday night and there is a small chance for a wintry mix of precipitation south of I-90 in the lower Columbia Basin late Tuesday night. There are slight model differences on the track of the snow bands across the region, but does look like many areas north I-90 will receive a dusting to an inch of fresh snow by Wednesday morning. This may impact morning commuters on Wednesday with snow covered roadways. The shortwave exits by Wednesday afternoon as daytime highs rise into the mid 30s to lower 40s. Southwest winds will increase on the ridge tops, although not much in the way of winds or mixing develops in the boundary layer. This may help keep low clouds across the low lands and settles in Wednesday evening as a shortwave ridge moves into the region. /rfox.

Wednesday night through Friday: The stronger Pacific storm make its greatest impacts during this period with valley rains and mountain snow. Overnight Wednesday will also see the significant snowfall across the Cascade Crest which could cause travel disruptions over mountain passes. Some mountain locations near or at the Crest could see more than a foot of snow across the highest terrain. NCEP and European deterministic model guidance correlate well with the timing and impact of precipitation across the region. So POPs through the Wednesday evening period were slightly nudged toward European ensemble guidance to reflect a better area of coverage over the higher elevations. As this system continues east and further flattens the upper ridge, several disturbances/pieces of energy will continue to affect the region through Friday. A 150-160kt jet core entering the PacNW will also reinforce this stronger system with enhance orographic forcing and moisture flow over the Cascades along with the higher elevations across northeast WA and the Idaho Panhandle. GEFS and ECMWF ensemble guidance swapped positions as to the trajectory of the strongest plume of moisture into the Inland Northwest. The NAEFS guidance does show PW values increasing above an inch over the CWA. So a recipe of valley rain and mountain snow should continue into Friday. Temperatures will also be at least 5 to 10 degrees above average through this period.

Saturday through Monday morning: As the predominate westerly upper flow becomes more northwesterly through the weekend, temperatures will see a drop across the region. The result is some valley locations across eastern Washington may have a better chance for snow reaching the valley floors. Although model guidance does show a gradual decrease in mountain snowfall across the Cascades, precipitation should continue over higher terrain across the northern Panhandle with a chance for some snow reaching valley floors over the Camas Prairie overnight Saturday. Temperature through the period should remain at or slightly below average through the weekend /aky

AVIATION. 06Z TAFS: Low level moisture and high pressure will continue to promote low clouds and a threat of fog over EAT/MWH/GEG/SFF/COE/LWS, while PUW wavers on the east side of the low cloud threat. Some improvement is then projected going through the day Tuesday, after 17-22Z. The next system will be on the approach Tuesday night, increasing snow chances. The first threat starts around EAT/MWH after 00-02Z and expands to GEG/SFF/COE after 03-05Z but the overall best threat comes just after this TAF period. /Cote'

PRELIMINARY POINT TEMPS/POPS. Spokane 27 34 29 38 33 41 / 0 0 60 30 80 70 Coeur d'Alene 28 39 30 37 32 38 / 10 0 60 50 80 90 Pullman 29 40 31 40 35 44 / 0 0 60 50 70 80 Lewiston 30 43 33 44 38 47 / 0 0 30 30 70 80 Colville 23 37 27 39 31 41 / 0 10 50 10 80 60 Sandpoint 26 36 30 37 31 37 / 10 10 60 40 80 90 Kellogg 30 38 32 39 35 39 / 10 0 60 60 80 90 Moses Lake 27 35 28 39 33 44 / 10 10 50 10 70 40 Wenatchee 29 35 29 37 31 41 / 0 10 40 10 70 50 Omak 25 35 27 36 32 39 / 0 0 30 10 60 30

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




Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pullman / Moscow Regional Airport, WA7 mi62 minENE 510.00 miFair31°F28°F89%1026.3 hPa
Lewiston, Lewiston-Nez Perce County Airport, ID24 mi2 hrsSE 30.25 miFreezing Fog31°F28°F92%1026.9 hPa

Link to 5 minute data for KPUW

Wind History from PUW (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmE4E6E7SE5SE3SW8SW5SW6S3CalmCalmE4E5E5
1 day agoNE6E3SE3CalmW7W7W9W8W9W6W7W9W10W10W9W8W7W5W5W5SW3W3CalmS3
2 days agoE8E7E10E10E6E8E7E9E12E8E9E7E9E9S13S11S10S9S4E8E7E8E7E5

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Spokane, WA (0,6,7,8)
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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 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.