Sunday, August19, 2018 L-36.com


Marine Weather and Tides
Grayland, WA

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Sunrise 6:17AMSunset 8:19PM Sunday August 19, 2018 7:06 AM PDT (14:06 UTC) Moonrise 2:47PMMoonset 12:00AM Illumination 56% Phase: First Quarter Moon; Moon at 8 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- 306 am pdt Sun aug 19 2018 combined seas 2 to 4 ft. Bar conditions light. The maximum ebb currents will occur around noon today and 1230 am Monday.
PZZ100 306 Am Pdt Sun Aug 19 2018
Synopsis for the northern and central washington coastal and inland waters..Higher pres over british columbia with lower pres over oregon will keep the flow northerly through Tuesday. Expect strong onshore flow to develop on Wednesday. Meanwhile, expect wildfire smoke to drift across the area through midweek.


7 Day Forecast for Marine Location Near Grayland, WA
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location: 46.86, -124.07     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 191040
afdpqr
area forecast discussion
national weather service portland or
340 am pdt Sun aug 19 2018

Synopsis Low clouds are widespread along the coast this morning,
as the marine layer deepens ahead of an incoming weak upper low.

Temperatures today will be similar to Saturday, just a few degrees
above normal inland. This system will linger over oregon through
Tuesday, bringing a slight chance of afternoon and evening
thunderstorms along the cascades each day. Increasing offshore flow
will result in hot and dry weather Monday and Tuesday, though smoke
and haze will likely hold temperatures a few degrees cooler than they
otherwise would be in this scenario. Cooler weather is expected to
return toward the end of the week as zonal flow develops across the
northeast pacific.

Short term Today through Tuesday... Not much change to the forecast
this morning, as modest onshore flow persists ahead of an incoming
upper level low. Temperatures today should be similar to Saturday;
perhaps even a little cooler due a deepening marine layer. Inland
valleys should top out in the 80s, while the coast remains cool and
cloudy with highs in the 60s. There will be a slight chance of
thunder along the cascades this afternoon and evening as temperatures
cool aloft, but moisture will be limited. Any convection that
develops this afternoon should remain over the cascades due to weak
steering flow.

As the upper low moves into oregon, models suggest shortwave energy
presently over northern bc will dive south, eventually replacing the
upper low over oregon for Monday. Models now show good agreement that
the resulting system will then drift south toward the or ca border,
resulting in substantial offshore flow later Monday into Tuesday.

This will set the stage for hot and dry conditions by Tuesday, with
only modest overnight humidity recovery for the higher terrain. It
remains unclear whether offshore winds will be strong enough to
necessitate a red flag warning, but it will be close. The offshore
flow will likely drive high temperatures into the 90s for the inland
valleys, but does not look quite strong enough for these temperatures
to reach the coast. Inland temperatures would likely reach 100
degrees in the willamette valley under this scenario, but the
offshore flow will also be carrying plenty of smoke and haze into the
forecast area, shading the Sun and taking the edge off the heat. Air
quality will likely take a hit Monday and Tuesday as lower elevation
smoke from fires in central and eastern washington becomes
increasingly involved.

The presence of the upper low nearby will keep a slight chance of
thunderstorms along the cascade crest through Tuesday. With steering
flow becoming northeasterly, cannot completely rule out the
possibility of thunderstorms drifting into the portland vancouver
metro and the willamette valley. With only marginal instability in
the cascades, decided to limit the thunderstorm mention to the
cascades and foothills. Weagle

Long term Tuesday night through Saturday... Medium range models are
finally coming into better agreement on kicking the upper low east of
the forecast area Wednesday, as a somewhat zonal jet stream begins to
push into the NE pacific. With flow aloft turning westerly and
shortwave ridging moving across the pac nw, decided to remove the
mention of thunder in the cascades Wednesday. With offshore flow no
longer in place, temperatures Wednesday should be a bit cooler than
Tuesday, but still above normal due to the ridging. A weak shortwave
trough is forecast to move across bc wa Thursday, likely deepening
the marine layer Thursday morning as it approaches. There may even be
some light rain or drizzle along our northern coastal and coast range
zones Thursday and or Friday morning. However, the main impact of
this pattern change will likely be the enhancement of onshore flow,
bringing a sharp decline in temperatures back to near or even
slightly below normal toward the end of the week, with highs likely
dropping into the mid 70s to lower 80s Thursday through Saturday.

There may even be a bit of a chill to the air at night, with outlying
valleys possibly dropping into the 40s if skies remain clear enough.

Weagle

Aviation Onshore flow will keep ifr marine stratus on the
coast this morning. Expect stratus to retreat to the beaches
this afternoon for a few hours ofVFR conditions. Ifr stratus
likely returns to coastal TAF sites this evening and persists
through the overnight hours.

The interior will remain mostlyVFR the next 24 hours. However,
marine stratus moving up the lower columbia river could bring a
few hours of high ifr to low MVFR CIGS to portland metro taf
sites between 13-18z this morning.

Smoke from wildfires burning across the pacific northwest will
bring hazy skies to the forecast area today. The smoke layer
should remain elevated today so not expecting any reductions in
surface visibilities.

There is also a slight chance of thunderstorms over the cascade
crest this afternoon and evening that could impact some western
approaches. Expect steering flow to keep these storms confined to
the cascade crest and not drift over interior TAF sites.

Kpdx and approaches... MostlyVFR the next 24 hours, but a few
hours of high ifr to low MVFR CIGS are possible between 14-17z
as marine stratus filters up the lower columbia river. 64

Marine High pressure over the northeast pacific and thermally
induced low pressure over northern california and the great basin
will more or less continue through much of the week resulting in
little day to day change in winds and seas. Expect wind gusts to
generally remain below 20 kt through the week, with seas in the
4 to 6 ft range. Seas look to become a little more messy towards
the middle of the week as multiple wave trains move across the
waters. A dominant wave period around 7 to 8 seconds will also
keep seas rather choppy through the week. 64 neuman

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... None.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WPTW1 - 9441102 - Westport, WA 4 mi90 min SSE 1 G 1.9 52°F 58°F1019.6 hPa
46211 - Grays Harbor, WA (036) 9 mi36 min 55°F4 ft
TOKW1 - 9440910 - Toke Point, WA 12 mi42 min W 1 G 2.9 54°F 62°F1020 hPa
46099 28 mi156 min NNE 3.9 54°F 58°F1019.4 hPa
46243 - Clatsop Spit, OR - 162 45 mi36 min 62°F5 ft
46096 48 mi96 min S 1.9 G 3.9 51°F 57°F1020.1 hPa
ASTO3 - 9439040 - Astoria, OR 48 mi36 min SSE 5.1 G 6 56°F 70°F1019.7 hPa

Wind History for Westport, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hoquiam, Bowerman Airport, WA10 mi73 minN 03.00 miFog/Mist55°F55°F100%1020.1 hPa

Wind History from HQM (wind in knots)
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Last 24hrNE5E6CalmCalmSW7SW10SW14SW11SW10SW10SW9SW9SW7W6SW6W6SW5W4CalmW3S4SW4CalmCalm
1 day agoW7W7W7W8SW11SW11SW10SW13SW11SW14SW11W10W8W3W6W4NW5NW3N3CalmCalmSE5SE4SE4
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Tide / Current Tables for Bay City, South Bay, Grays Harbor, Washington
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Bay City
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Sun -- 12:34 AM PDT     Moonset
Sun -- 02:04 AM PDT     0.98 feet Low Tide
Sun -- 06:19 AM PDT     Sunrise
Sun -- 08:45 AM PDT     6.52 feet High Tide
Sun -- 01:45 PM PDT     3.36 feet Low Tide
Sun -- 03:46 PM PDT     Moonrise
Sun -- 08:19 PM PDT     Sunset
Sun -- 08:29 PM PDT     8.69 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.91.511.32.13.24.55.66.46.565.24.33.63.43.84.75.8788.68.67.76.3

Tide / Current Tables for Grays Harbor Entrance, Washington Current
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Grays Harbor Entrance
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Sun -- 12:34 AM PDT     Moonset
Sun -- 03:11 AM PDT     0.00 knots Slack
Sun -- 06:19 AM PDT     Sunrise
Sun -- 06:41 AM PDT     1.23 knots Max Flood
Sun -- 08:49 AM PDT     -0.00 knots Slack
Sun -- 11:58 AM PDT     -1.50 knots Max Ebb
Sun -- 02:30 PM PDT     0.00 knots Slack
Sun -- 03:46 PM PDT     Moonrise
Sun -- 06:09 PM PDT     1.22 knots Max Flood
Sun -- 08:19 PM PDT     Sunset
Sun -- 08:44 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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-2.6-2-1-0.10.50.91.11.20.7-0.2-0.9-1.3-1.5-1.2-0.40.40.91.21.21.20.7-0.3-1.4-2.1

Weather Map and Satellite Images
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wmap_P
GOES 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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Wind Forecast for Portland, OR (10,2,3,4)
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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 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.