Thursday, July9, 2020
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Marine Weather and Tides
Central Park, 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 5:29AMSunset 9:12PM Thursday July 9, 2020 3:41 AM PDT (10:41 UTC) Moonrise 11:08PMMoonset 9:11AM Illumination 84% Phase: Waning Gibbous; Moon at 19 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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PZZ110 Grays harbor bar- 238 am pdt Thu jul 9 2020 combined seas 2 to 4 feet. Bar conditions light. Maximum ebb currents will occur around 800 am and 845 pm Thursday. The Thursday morning ebb will be strong.
PZZ100 238 Am Pdt Thu Jul 9 2020
Synopsis for the northern and central washington coastal and inland waters..Onshore flow will continue through the upcoming weekend as high pressure remains centered offshore.


7 Day Forecast for Marine Location Near Central Park, WA
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location: 46.97, -123.7     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 091010 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 310 AM PDT Thu Jul 9 2020

SYNOPSIS. A frontal system will pass through the area today and into tonight. Additional upper level low pressure systems will move through Western Washington from time to time throughout the next seven days resulting in light rain at times. None of these systems appears to create any real significant impacts for the area.

SHORT TERM /TODAY THROUGH SATURDAY/. Both satellite and radar showing a front starting to push its way into the area with generally light echoes over the northern third of the CWA this morning. Current model data shows that this front will mainly be a concern for the northern two-thirds of the area with slight PoPs present over the southernmost reaches. Neither of the deterministic models have much faith in this front holding together all that well . so while PoPs become more widespread throughout the day . they also fall a little bit too as the front slowly dissipates as it moves over the area Looking at ensemble data. none of the members seem to be particularly enthusiastic either.

By Friday morning the front has moved on and looks to be replaced by a weak upper level ridge building over W WA. This will keep conditions dry throughout Friday and as the ridge axis shifts east of the area and into Montana . generally dry conditions will persist into Saturday. Current deterministic models are leaning toward the entire day Saturday being dry . but some ensemble members are a little gun shy about a dissipating front off the coast that might spill into the coastal areas . thus some PoPs there.

Mild temps today with passing front with generally mid 60s for most of the coastal lowlands . although interior lowlands will see temps in the upper 60s to lower 70s. As the upper ridge builds for Friday and Sat . temps bump up into the lower to mid 70s for the interior and mid to upper 60s along the coast.

LONG TERM /SUNDAY THROUGH WEDNESDAY/. A passing upper level trough will bring the prospect of rain back to W WA Sunday . however . deterministic models handle this event very similarly to front that is passing through currently . meaning that neither model shows the feature as being terribly impressive nor cohesive as it too seems to want to fall apart as it moves through. The ensembles react similarly as there is a blip of precip but on average nothing stellar. Monday sees W WA on the back side of the trough with perhaps some lingering showers over the Cascades . but otherwise generally dry conditions. Deterministic models are in agreement with their uncertainty for Tuesday and beyond where they seem to ramp up a system off the Pacific coast and seem ready to bring it inland only to have it peter out as an upper level ridge forms resulting in generally dry conditions. That seems a little off . and ensembles reflect that with most members showing the prospect for some light precip in this extended period. However . this might be more an indication of some ensemble members going a little overboard with the precip and likely impacting the group average All in all. a pretty long winded way of saying that there really is not a whole lot of confidence in the long term forecast and thus . left some slight chance PoPs in but am generally inclined to believe in a mainly dry period. 18

AVIATION. Southwest flow aloft today will become westerly this evening as an upper level trough moves through the region. Ceilings lowering to MVFR this morning in light rain showers. Improvement to VFR expect by 21Z-00Z this afternoon as a frontal boundary moves east of the Cascades and showers diminish. MVFR ceilings may redevelop by early Friday morning as low level onshore flow pulls coastal stratus inland.

KSEA . MVFR ceilings with rain showers through around midday, then ceilings expected to lift to VFR by mid-afternoon. MVFR ceilings in stratus could return for a period Friday morning. Surface winds S-SW 5 to 9 knots . becoming light northerly this evening. 27

MARINE. Surface high pressure will remain over the coastal waters with lower pressure east of the Cascades over the next several days. Weak weather systems passing through the region will lead to periodic increases in onshore flow and advisory level westerly winds in the Strait of Juan de Fuca at times. 27

HYDROLOGY. The daily hydrology discussion has ended until the start of the next rainy season; it will only be updated as needed until then.

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . Small Craft Advisory from 5 PM this afternoon to 3 AM PDT Friday for Central U.S. Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca.



www.weather.gov/seattle


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WPTW1 - 9441102 - Westport, WA 22 mi65 min SW 2.9 G 4.1 58°F 59°F1016.6 hPa
TOKW1 - 9440910 - Toke Point, WA 23 mi53 min ENE 4.1 G 4.1 59°F 64°F1016.8 hPa
46211 - Grays Harbor, WA (036) 30 mi45 min 60°F2 ft
46124 44 mi199 min 53°F
46099 46 mi171 min S 3.9 59°F 59°F1016.5 hPa

Wind History for Westport, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hoquiam, Bowerman Airport, WA14 mi48 minWSW 410.00 miOvercast59°F55°F90%1016.9 hPa

Link to 5 minute data for KHQM

Wind History from HQM (wind in knots)
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Last 24hrCalmNW5NW4CalmW35SW9SW9W10SW9SW10W12SW8W11W8W9W8NW5NW3N3CalmCalmCalmW4
1 day agoW7NW4SW3CalmCalmSE4CalmCalmCalmW6W10W11W12SW12SW11W12W6W8NW6NW3NW4NW6CalmNE3
2 days agoE4E4CalmCalmCalmE4CalmSW6SW5W8W12W11W13W13W11SW11W9W9W10W9W8NW6W8W9

Tide / Current Tables for Cosmopolis, Chehalis River, Grays Harbor, Washington
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Cosmopolis
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Thu -- 04:32 AM PDT     9.37 feet High Tide
Thu -- 05:30 AM PDT     Sunrise
Thu -- 10:11 AM PDT     Moonset
Thu -- 11:05 AM PDT     -0.76 feet Low Tide
Thu -- 05:55 PM PDT     8.94 feet High Tide
Thu -- 09:09 PM PDT     Sunset
Thu -- 11:25 PM PDT     2.83 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.95.67.28.49.29.38.36.44.220.1-0.8-0.11.53.55.47.28.58.98.375.543

Tide / Current Tables for Grays Harbor Entrance, Washington Current
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Grays Harbor Entrance
Click for Map
Thu -- 01:20 AM PDT     1.42 knots Max Flood
Thu -- 04:18 AM PDT     -0.00 knots Slack
Thu -- 05:32 AM PDT     Sunrise
Thu -- 08:00 AM PDT     -3.19 knots Max Ebb
Thu -- 10:13 AM PDT     Moonset
Thu -- 11:19 AM PDT     0.01 knots Slack
Thu -- 02:35 PM PDT     2.12 knots Max Flood
Thu -- 05:44 PM PDT     -0.01 knots Slack
Thu -- 08:48 PM PDT     -2.06 knots Max Ebb
Thu -- 09:11 PM PDT     Sunset
Thu -- 11:37 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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11.41.310.3-0.9-2.2-2.9-3.2-2.9-1.9-0.40.81.72.12.11.80.9-0.3-1.4-1.9-2.1-1.6-0.6

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Seattle, WA (6,6,7,8)
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Ground Weather Radar Station Portland, OR
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Disclaimer:
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.