Sunday, March29, 2020
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Marine Weather and Tides
Etna, CA

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 6:55AMSunset 7:35PM Sunday March 29, 2020 10:38 AM PDT (17:38 UTC) Moonrise 8:55AMMoonset 11:56PM Illumination 31% Phase: Waxing Crescent; Moon at 6 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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PZZ450 Pt St George To Cape Mendocino Out 10 Nm- 833 Am Pdt Sun Mar 29 2020
.small craft advisory in effect from late tonight through Monday morning...
Today..SW winds 5 to 10 kt. Waves sw 4 ft at 8 seconds. Chance of showers.
Tonight..S winds 10 to 20 kt. Gusts up to 30 kt. Waves S 5 ft at 5 seconds. Showers likely.
Mon..S winds 15 to 20 kt. Gusts up to 30 kt. Waves nw 7 ft at 10 seconds. Showers.
Mon night..SW winds 5 to 10 kt. Waves nw 8 ft at 11 seconds.
Tue..NW winds 5 to 10 kt. Waves nw 10 ft at 13 seconds.
Wed..N winds 10 to 15 kt. Waves nw 8 ft at 11 seconds.
Thu..N winds 5 to 15 kt. Waves nw 6 ft at 9 seconds.
PZZ400 833 Am Pdt Sun Mar 29 2020
Synopsis for northern california waters..Southerly winds early this morning will switch to light southwest to west later today. Another round of locally gusty southerly winds will precede the next front late tonight, accompanied by some briefly rougher seas. Otherwise seas will remain relatively low until a northwest swell pushes in Monday night and Tuesday.


7 Day Forecast for Marine Location Near Etna, CA
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location: 41.34, -123.02     debug


Area Discussion for - Medford, OR
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FXUS66 KMFR 291609 AFDMFR

Area Forecast Discussion National Weather Service Medford OR 909 AM PDT Sun Mar 29 2020

DISCUSSION. Current radar imagery is showing the focus for precipitation from the Cascades southward to the mountains of western Siskiyou County and also along the coast. Some showers are also scattered across the east side, but amounts are mostly on the light side. 24-hour amounts ending at 15z (8 am PDT) of 0.10-0.20 of an inch were common with a couple of RAWS (Quail Prairie in the Coast Range and Buckeye in east Douglas County) measured around 0.40 of an inch. East side areas had less than 0.10 of an inch. Here in Medford, rain last night was 0.08. Web cams showed some snow covered roads up over the mountains near Diamond Lake/Crater Lake and Cedar Pass in Modoc County with some road side slush at Lake of the Woods and the higher pass on Dead Indian Memorial Road. With road surfaces warming this morning, any snow covered roads should mostly melt off.

Another upper trough, currently bringing some heavier rainfall to the coast north of Cape Blanco (~0.25" in the last 2 hours at North Bend), will move onshore today. So, expect additional showers to develop as it moves inland. Some weak instability develops over the far east side (mainly Lake County) this afternoon, so we have a slight chance of a thunderstorm over there. Snow levels will rise to near to even a bit above 5000 feet this afternoon, so any additional accumulation should only be up around Crater Lake and perhaps Mt Ashland (maybe an inch or two).

The next trough and cold front moves in quickly tonight into Monday with moist, onshore continuing Monday night through at least Tuesday. This will be the strongest of the systems so far. We have issued a wind advisory (NPWMFR) Monday and into Monday night east of the Cascades for wind gusts to 55 mph. This time, snow will likely be heavier over the Cascades, especially north of Highway 140. We have a winter weather advisory (WSWMFR) out for that. We'll see if that needs any adjustments as new guidance arrives this morning. -Spilde

AVIATION. For the 29/12Z TAF Cycle . From the Cascades west . Areas of MVFR/IFR cigs in low clouds and showers with higher terrain obscured will clear to VFR by Sunday afternoon, but there will still be areas of obscured higher terrain. Another front will move in Sunday night, bringing areas of MVFR cigs in low clouds and rain/snow with higher terrain obscured.

East of the Cascades . VFR conditions will prevail through Sunday night, but there will be areas of obscured higher terrain.

MARINE. Updated 800 AM PDT Sunday 29 March 2020 . A series of fronts will move onshore through Tuesday. The strongest in the series is expected late tonight into Monday and it will bring gale force winds to portions of the area with hazardous seas elsewhere. Small craft conditions will periodically affect most of the area through Tuesday evening and northwest swell will peak at around 10 to 12 ft Tuesday afternoon. Advisory level conditions will likely continue into Wednesday as seas subside while high pressure builds in Tuesday night through Wednesday night.

Eventually seas should drop below 7 ft late Wednesday night and remain relatively calm into Friday. Expect northerly winds during this time between 10 to 15 kt with up to 20 kt possible south of Cape Blanco. Another front will approach the area Friday. /BR-y

PREV DISCUSSION. /Issued 352 AM PDT Sun Mar 29 2020/

DISCUSSION . Today will be wet with showers just about everywhere as the upper trough moves overhead. Precipitation amounts are expected to be highest along the coast, coastal mountains and Cascades. The webcam at Diamond Lake area shows light to moderate snow with temperatures around 32 degrees F. Given it's still dark, its a challenge to determine the road conditions, but they look wet with some slush on the sides and near the center. The latest radar image is rather begin in that it's not showing much in the way of returns, but it's possible it could be overshooting some of the precipitation that's occurring around Crater Lake and Diamond Lake.

Snow levels will start out around 4500 feet, then rising to around 5000 feet this afternoon. Since precipitation is expected to be mainly light to occasionally moderate, any road snow will be confined to the higher elevations (Crater Lake and Diamond Lake), even then any snow should be mostly roadside slush and mainly during the morning hours.

The upper trough will move east of the area Sunday evening and we'll catch a brief break in precipitation but it may not go away completely as we'll remain in a moist west flow as another upper low slides south over central Vancouver Island and an upper jet moves into the area. This upper jet will remain over the area and will provide some additional energy for moderate to occasionally heavy precipitation late tonight through Monday. Precipitation will be heaviest along the coast, coastal mountains and Cascades courtesy of a moist westerly flow. Snow levels Monday are expected to hover around 5000 feet which will still put the Crater Lake area and highways 138 and 230 near Diamond Lake at risk for some road snow. Road snow accumulations should be mitigated due to a stronger March sun and warmer road temperatures. However since precipitation is expected to be moderate to heavy at times, it may be enough to result in slushy or snow covered roads at times in the above mentioned areas.

Also of note, gusty winds are expected east of the Cascades late Monday morning into Monday evening as 700 mb winds between 55-60 kts moves overhead. Advisory criteria could be met in Lake and far eastern part of Klamath County, thus a wind advisory has been issued. Please see NPWMFR for more details. It's possible high wind criteria could be met around Summer Lake, but confidence was not high enough to issue a warning there. Later shifts may need to take another look at this should there be stronger evidence supporting a warning.

Precipitation will gradually diminish Monday night into Tuesday morning, the exception will be along the coastal mountains and northern Cascades where we could see moderate to occasionally heavy precipitation due to good orographic upslope flow and strong jet remaining overhead providing additional energy. Since we'll be losing daytime warming, cooler temperatures and snow levels dropping down between 3500 and 4000 feet towards daybreak Wednesday, there's concern advisory levels could be met around Crater Lake and highways 138 and 230 near Diamond Lake, thus a snow advisory has been issued. Please see WSWMFR for more details.

Most west to northwest flow will continue Tuesday as the parent upper low moves into northwest Washington. Precipitation will tend to persist mainly north of the Umpqua Basin and northern Cascades and more intermittent elsewhere from the Cascades westward in Oregon.

The models pretty much have done an about face on Wednesday and all are showing an upper trough with a moist west to northwest flow over the area. The best chance for precipitation will be mainly north of the Umpqua Divide and northern Cascades. -Petrucelli

AVIATION . For the 29/06Z TAF Cycle . A showery pattern will bring increasing MVFR ceilings tonight with areas of obscured terrain. Freezing levels will be 4500 to 5000 feet with showers most numerous near the coast and secondarily, over the higher terrain tonight. Showers will increase from the Cascades west Sunday morning into early Sunday afternoon. Conditions will lower to mainly MVFR/IFR early Sunday morning as another wave of precipitation moves into the area. Expect MVFR cigs to continue through Sunday afternoon, followed by a mix of VFR/MVFR late Sunday afternoon into Sunday evening. -CC

MARINE . Updated 230 PM PDT Sunday 29 March 2020 . A series of fronts will move onshore through Tuesday. The strongest in the series will move onshore late Sunday night into Monday and it will bring gale force winds to portions of the area and hazardous seas to the remainder. Small craft conditions will periodically affect most of the area through Tuesday evening and northwest swell will peak Tuesday. High pressure will build in Tuesday night through Wednesday night, then weaken Thursday as another front approaches the area.

MFR WATCHES/WARNINGS/ADVISORIES. OR . Wind Advisory from 11 AM to 8 PM PDT Monday for ORZ030-031. Winter Weather Advisory from 5 PM Monday to 8 AM PDT Tuesday for ORZ027.

CA . None.

Pacific Coastal Waters . Small Craft Advisory until 11 AM PDT this morning for PZZ350-356-370-376. Small Craft Advisory from 5 PM this afternoon to 11 AM PDT Monday for PZZ350-356-370-376. Gale Warning from 11 PM this evening to 11 AM PDT Monday for PZZ350-356-370. Hazardous Seas Warning from 11 PM this evening to 11 AM PDT Monday for PZZ350-356-370-376.

MAS/MAP/JRS


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CECC1 - 9419750 - Crescent City, CA 68 mi50 min S 13 G 15 52°F 52°F1018 hPa
HBYC1 - 9418767 - North Spit, CA 75 mi62 min 52°F1018.2 hPa
46244 - Humboldt Bay, North Spit, CA 77 mi38 min 51°F4 ft

Wind History for Crescent City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mount Shasta, CA37 mi42 minN 010.00 miOvercast40°F37°F89%1020.2 hPa

Link to 5 minute data for KMHS

Wind History from MHS (wind in knots)
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Last 24hrSE5Calm3CalmSE343SE3E3Calm3Calm3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoCalmCalm3CalmCalmW4CalmCalmCalm3CalmCalmE3CalmCalmE3E3E3CalmE3CalmCalmCalmCalm
2 days ago4CalmNW356NW755435CalmCalm4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Trinidad Harbor, California
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Trinidad Harbor
Click for Map
Sun -- 02:53 AM PDT     6.08 feet High Tide
Sun -- 07:03 AM PDT     Sunrise
Sun -- 09:50 AM PDT     0.56 feet Low Tide
Sun -- 10:00 AM PDT     Moonrise
Sun -- 04:19 PM PDT     4.63 feet High Tide
Sun -- 07:39 PM PDT     Sunset
Sun -- 09:22 PM PDT     2.79 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.35.25.96.15.74.93.82.51.40.80.60.91.72.63.64.34.64.54.23.63.12.82.93.3

Tide / Current Tables for Arcata Wharf, Humboldt Bay, California
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Arcata Wharf
Click for Map
Sun -- 03:52 AM PDT     6.62 feet High Tide
Sun -- 07:03 AM PDT     Sunrise
Sun -- 10:00 AM PDT     Moonrise
Sun -- 11:00 AM PDT     0.70 feet Low Tide
Sun -- 05:23 PM PDT     5.05 feet High Tide
Sun -- 07:39 PM PDT     Sunset
Sun -- 10:36 PM PDT     3.06 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.64.75.76.46.66.35.54.331.810.711.82.93.94.7554.64.13.53.13.1

Weather Map
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wmap_P
GEOS Local Image of CentralWestCoast    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 Medford, OR (13,3,4,5)
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Ground Weather Radar Station Medford, OR
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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.