Thursday, December12, 2019
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Marine Weather and Tides
Ocean City, WA

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 7:49AMSunset 4:28PM Thursday December 12, 2019 5:32 AM PST (13:32 UTC) Moonrise 5:09PMMoonset 8:18AM Illumination 99% 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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PZZ156 Expires:201912121945;;233396 Fzus56 Ksew 121037 Cwfsew Coastal Waters Forecast For Washington National Weather Service Seattle Wa 237 Am Pst Thu Dec 12 2019 Inland Waters Of Western Washington And The Northern And Central Washington Coastal Waters Including The Olympic Coast National Marine Sanctuary Pzz150-153-156-170-173-176-121945- Coastal Waters From Cape Flattery To James Island Out 10 Nm- Coastal Waters From James Island To Point Grenville Out 10 Nm- Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm- Coastal Waters From Cape Flattery To James Island 10 To 60 Nm- Coastal Waters From James Island To Point Grenville 10 To 60 Nm- Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm- 237 Am Pst Thu Dec 12 2019
.small craft advisory in effect through Saturday morning...
Today..SW wind 20 to 30 kt easing to 15 to 25 kt in the afternoon. Wind waves 3 to 5 ft subsiding to 2 to 4 ft in the afternoon. W swell 18 ft at 17 seconds. A chance of rain in the morning then rain and a slight chance of tstms in the afternoon.
Tonight..W wind 10 to 20 kt. Wind waves 1 to 3 ft. W swell 19 ft at 16 seconds. A chance of showers and isolated tstms in the evening then showers after midnight.
Fri..W wind 10 to 20 kt becoming sw 5 to 15 kt in the afternoon. Wind waves 1 to 3 ft. W swell 17 ft at 16 seconds. Rain likely in the morning then a chance of showers in the afternoon.
Fri night..W wind to 10 kt becoming N after midnight. Wind waves 1 ft or less. W swell 17 ft at 16 seconds subsiding to 15 ft at 15 seconds after midnight.
Sat..E wind to 10 kt. Wind waves 1 ft or less. W swell 13 ft at 15 seconds subsiding to 11 ft at 14 seconds in the afternoon.
Sat night..N wind 5 to 15 kt. Wind waves 2 ft or less. W swell 10 ft at 13 seconds.
Sun..NW wind 5 to 15 kt becoming se. Wind waves 2 ft or less. W swell 10 ft.
Mon..S wind 5 to 15 kt becoming se 15 to 25 kt. Wind waves 2 to 4 ft. W swell 7 ft.
PZZ100 237 Am Pst Thu Dec 12 2019
Synopsis for the northern and central washington coastal and inland waters..Another organized frontal boundary will move through the area on Thursday, reinforcing breezy and rainy conditions. A isolated Thunderstorm will also be possible across the coastal waters on Thursday. Onshore flow Thursday night will ease Friday. A weather disturbance will move ashore south of the area over the weekend.


7 Day Forecast for Marine Location Near Ocean City, WA
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location: 47.09, -124.17     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 121207 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 407 AM PST Thu Dec 12 2019

SYNOPSIS. Another frontal system will move through Western Washington later today. A cool upper level trough will settle over the area for Friday and Saturday. Warm front brushing the area on Sunday. Possible break in the action next week before the upper level flow consolidates again late in the week.

SHORT TERM /TODAY THROUGH SATURDAY/. Satellite imagery shows a little bit of a break in the action for Western Washington this morning. Doppler radar has some shower activity along the coast and in the mountains with a little activity over the interior lowlands at 3 am/11z. Temperatures at 3 am were mostly in the 40s to lower 50s.

Main weather story this morning is the snow in the mountains for the next 30 hours or so. Snow levels are near 4000 feet this morning. Easterly flow in the passes kept the snow levels below pass levels at Stevens and Snoqualmie pass yesterday into the early morning hours. The low level easterly flow is now gone ( KSEA-KEAT gradient less than -1 mb ). Observations from our friends at the Northwest Avalanche Center equipment show Stevens pass has warmed from 24 to 33 degrees in the last 2 hours. Snoqualmie pass is still at 30 degrees but the temperatures at 3800 feet above the pass has also warmed from 25 to 33 degrees in the last three hours so it is only a matter of time before the warmer air starts mixing in at Snoqualmie pass too. For the remainder of the day the snow levels will remain between 3500-4000 feet. Precipitation in the mountains will continue to be showery this morning with more steady precipitation ahead of the a front moving into the area this afternoon.

Snow levels remaining near 3500 feet early tonight with the post frontal cooler air mass slowly filtering into the area overnight dropping the snow levels a few hundred feet. snow levels on Friday hovering around the 3000 foot range but moisture amounts will decrease rapidly in the afternoon.

For the morning package will keep the winter storm warnings in effect but increase the snow level from 3000 to 3500 feet for the warning for the Cascades of Whatcom, Skagit, Snohomish and King counties. Precipitation amounts with the front not looking as heavy as previous thought and post frontal orographics is not very impressive at all ( 850 mb winds 25 knots at best with most areas 10-15 knots ). Will lower the snow amounts and go for 12-18 inches at Mount Baker and Stevens Pass, 18-24 for Paradise on Mount Rainier and six inches or so for the Snoqualmie pass area. These totals are for the snow amounts ending late Friday morning.

For the lowlands today scattered showers this morning with another round of rain this afternoon as the front moves into the area. More shower activity tonight behind the front with the shower activity continuing into Friday morning. Shower activity decreasing Friday afternoon. Air mass still somewhat unstable behind the front keep a chance of thunderstorms in the forecast for the coast tonight. Highs today will be near the current temperatures, mid 40s to lower 50s. Lows tonight in the 40s. Highs on Friday a couple of degrees cooler, mostly in the mid to upper 40s.

Upper level trough remaining over Western Washington Friday night into Saturday keeping showers in the forecast. Lows in the upper 30s and 40s. Highs in the mid and upper 40s.

LONG TERM /SUNDAY THROUGH WEDNESDAY/. Not a lot of confidence in the extended forecast. Operational models are trending toward a drier forecast for the first part of next week while the ensembles and the model blends are not having any part of it. With the uncertainty in the models have left broad brush chance pops in the forecast through Tuesday. Models continuing with the inconstant solutions late in the period with the 00z runs keeping the split flow pattern intact keeping the front that was timed into the area on Wednesday out of the area. Will continue with the mostly chance pops for Wednesday and Thursday as well. Felton

AVIATION. Westerly flow aloft will continue today and into Friday. South to southwesterly surface flow remains in place but occasional breezes still possible today with winds 10-15 kts and gusts to 20-25 kts. Rain persists over portions of W WA this early morning but current radar shows perhaps a bit of shadowing going on over terminals along the east side of Puget Sound. Expect that to fill in by this afternoon another shortwave disturbance pushes through the area. Cigs generally ranging VFR to MVFR. While cigs may dip down into MVFR due to rain at times . passing shortwave should foster enough instability to keep cigs from dropping into IFR or lower.

KSEA . A brief break in the rainfall this early morning before rain expected to become more widespread again by 18Z. VFR cigs expected to remain in place . although may dip down into MVFR at times of rainfall. Winds remaining generally south 10-15kts with gusts 18- 22kts at times.

MARINE. A robust frontal boundary will continue to make eastward progress this morning across the western Washington marine waters. Widespread rain was seen on radar out ahead of the boundary, with more spotty/scattered activity located in its wake. Scattered rain shower activity will continue through the morning hours, with another frontal boundary approaching late this morning through the afternoon, bringing another round of widespread rainfall to the waters. With the rain showers, a few isolated thunderstorms will be possible across the Coastal Waters and along/just inland the Washington Coast. The main threat with any thunderstorm activity will be lightning.

The biggest headlines regarding the passing frontal boundaries will be lingering small craft winds. Have SCA headlines for wind up for the Coastal Waters, western Strait, eastern Strait, Northern Inland Waters, and Puget Sound going into Thursday. Winds are the expected to decrease Thursday afternoon into the evening hours, however, swells will remain high across the Coastal Waters so will keep SCA going for this area all the way into Saturday. Swells are expected to increase to between 17-18ft thru the day Thursday and remain in the 14-16ft range through Friday into early Saturday. Swells will also present hazardous surf conditions along the Washington Coast on Thursday so the High Surf Advisory will remain in effect into Friday.

Hazardous weather conditions over the waters are expected to subside by the latter half of the weekend.

Kovacik

HYDROLOGY. Another round of precipitation today into Friday morning. Snow levels are not high enough and precipitation amounts are not heavy enough to cause flooding concerns on area rivers. Saturday through the middle of next week river flooding is not expected.

SEW WATCHES/WARNINGS/ADVISORIES. WA . Winter Storm Warning until 10 AM PST Friday for Cascades of Pierce and Lewis Counties-Cascades of Snohomish and King Counties-Cascades of Whatcom and Skagit Counties.

High Surf Advisory from 8 AM this morning to 10 AM PST Friday for Central Coast-North Coast.

Winter Weather Advisory until 9 PM PST this evening for Olympics.

PZ . Small Craft Advisory until 10 AM PST Saturday for Coastal Waters From Cape Flattery To James Island 10 To 60 Nm-Coastal Waters From Cape Flattery To James Island Out 10 Nm-Coastal Waters From James Island To Point Grenville 10 To 60 Nm- Coastal Waters From James Island To Point Grenville Out 10 Nm-Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm-Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm-Grays Harbor Bar-West Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory until 5 PM PST this afternoon for East Entrance U.S. Waters Strait Of Juan De Fuca-Northern Inland Waters Including The San Juan Islands-Puget Sound and Hood Canal.

Small Craft Advisory until 4 AM PST early this morning for Admiralty Inlet.



www.weather.gov/seattle


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46211 - Grays Harbor, WA (036) 17 mi32 min 49°F11 ft
TOKW1 - 9440910 - Toke Point, WA 29 mi50 min S 13 G 16 50°F 48°F1013.1 hPa
46041 - CAPE ELIZABETH- 45NM Northwest of Aberdeen, WA 35 mi42 min S 14 G 16 50°F 49°F12 ft1010.7 hPa (+1.1)
DESW1 - Destruction Island, WA 44 mi32 min S 23 G 25 49°F 1010.7 hPa (+0.5)
46100 46 mi102 min S 14 52°F 52°F1010.4 hPa

Wind History for Westport, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hoquiam, Bowerman Airport, WA13 mi39 minS 1210.00 miOvercast50°F48°F96%1013 hPa

Link to 5 minute data for KHQM

Wind History from HQM (wind in knots)
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Tide / Current Tables for Point Brown, Grays Harbor, Washington
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Point Brown
Click for Map
Thu -- 01:08 AM PST     8.68 feet High Tide
Thu -- 06:19 AM PST     3.58 feet Low Tide
Thu -- 07:52 AM PST     Sunrise
Thu -- 08:18 AM PST     Moonset
Thu -- 12:21 PM PST     10.60 feet High Tide
Thu -- 04:27 PM PST     Sunset
Thu -- 05:09 PM PST     Moonrise
Thu -- 07:06 PM PST     -0.74 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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8.18.78.37.25.84.53.63.95.37.18.79.910.510.49.27.24.72.30.3-0.7-0.11.63.65.6

Tide / Current Tables for Grays Harbor Entrance, Washington Current
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Grays Harbor Entrance
Click for Map
Thu -- 01:30 AM PST     -0.01 knots Slack
Thu -- 04:20 AM PST     -2.10 knots Max Ebb
Thu -- 06:53 AM PST     0.01 knots Slack
Thu -- 07:52 AM PST     Sunrise
Thu -- 08:17 AM PST     Moonset
Thu -- 09:37 AM PST     2.06 knots Max Flood
Thu -- 12:43 PM PST     -0.00 knots Slack
Thu -- 04:26 PM PST     -4.01 knots Max Ebb
Thu -- 04:27 PM PST     Sunset
Thu -- 05:09 PM PST     Moonrise
Thu -- 07:53 PM PST     0.00 knots Slack
Thu -- 10:54 PM PST     2.50 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.80.7-0.7-1.7-2.1-2-1.10.11.31.921.60.8-0.4-2-3.4-4-3.9-3.1-1.50.21.52.32.5

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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Wind Forecast for Seattle, WA (8,2,3,4)
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Ground Weather Radar Station Seattle/Tacoma, 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.