Tuesday, December10, 2019
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Marine Weather and Tides
Happy Camp, CA

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 7:28AMSunset 4:49PM Tuesday December 10, 2019 4:05 PM PST (00:05 UTC) Moonrise 4:00PMMoonset 5:45AM Illumination 99% Phase: Waxing Gibbous; Moon at 14 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- 219 Pm Pst Tue Dec 10 2019
Tonight..S winds 5 to 15 kt. Waves se building to 5 ft at 7 seconds...and W building to 11 ft at 16 seconds. Rain. Slight chance of showers.
Wed..S winds 10 to 15 kt. Waves S 6 ft at 7 seconds...and W 8 ft at 14 seconds. Chance of showers.
Wed night..S winds 10 to 20 kt. Waves S 7 ft at 8 seconds... And W 12 ft at 18 seconds. Rain.
Thu..S winds 10 to 20 kt. Waves N 5 ft at 8 seconds...and W 15 ft at 18 seconds.
Thu night..S winds 5 kt. Waves W 15 ft at 17 seconds.
Fri..W winds 5 kt. Waves W 15 ft at 17 seconds.
Sat..W winds 5 to 10 kt. Waves W 11 ft at 15 seconds.
Sun..NE winds 5 kt. Waves W 12 ft at 14 seconds.
PZZ400 219 Pm Pst Tue Dec 10 2019
Synopsis for northern california waters..A frontal boundary brings moderate south winds and building seas today. A large, long period west-northwesterly swell is forecast to impact the waters on Thursday and Friday.


7 Day Forecast for Marine Location Near Happy Camp, CA
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location: 41.5, -123.35     debug


Area Discussion for - Medford, OR
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FXUS66 KMFR 102332 AFDMFR

Area Forecast Discussion National Weather Service Medford OR 331 PM PST Tue Dec 10 2019

Updated AVIATION Section

SHORT TERM. An active, wet pattern is expected through late this week as a westerly flow pattern aloft sets up over the region and a couple frontal system moves into the area. A front is moving inland today and tonight. This is followed by a strong and moist frontal system late Wednesday through Thursday night. The frontal system mid week will have significant upper level support as a 180 kt upper level jet moves into the region by Thursday. Additionally this frontal system is moist with models showing precipitable water values of around 0.8 to 1.0 inches moving into the coast late Wednesday and Thursday.

A front is moving onshore this afternoon with light to moderate precipitation spreading into the coast, coastal mountains and areas west of the Cascades. Models remain on track showing light to moderate precipitation spreading across the west side and into the Cascades this afternoon into early this evening. Then expect mainly light precipitation to spread east of the Cascades by late this evening. Light showers will follow tonight as a shortwave trough moves into the region. Snow levels have been rising ahead of this front and are around 5000 feet elevation or higher for western portions of the area. Areas from the Cascades east have remained cooler today. However, expect snow levels to rise late this afternoon and early this evening to 4500 to 5000 feet for areas from the Cascades east but then lower to 4000 to 4500 feet tonight. Light snow of around 1.0 inch is expected in the Cascades tonight, mainly for elevations of 5000 ft or higher. East of the Cascades, expect a mix of rain and snow this evening with light snow showers tonight.

On Wednesday, lingering light showers are expected during the morning with activity focused over the mountains and near the coast. This break in the shower activity will be brief though. Models remain in good agreement that a moist frontal system will move towards the area from the west with precipitation spreading inland during the afternoon. This front is forecast to gradually move into the coast Wednesday night and inland Thursday. Widespread light to moderate showers are expected Thursday night. Strong upper level dynamics are forecast over the area as this system moves inland with a 180 kt westerly jet aloft at 300 mb as well as a 40 to 50 kt westerly jet at 700 mb. This combined with a moist air mass, as indicated by by forecast precipitable water of around 1.0 inches along the coast, will bring moderate to locally heavy precipitation to the area late Wednesday through Thursday night. Storm total precipitation amounts of 1 to 3 inches are expected along the coast and into the Southern Oregon Cascades with around 0.5 to 1.5 inches of precipitation across other inland areas late Wednesday through Friday morning. Snow levels will remain high, rising to around 6000 to 6500 feet elevation late Wednesday then remaining high through the day Thursday. Snow levels will gradually lower Thursday night and early Friday morning to around 4500 to 5500 feet elevation. With continued showers during this period, moderate snow is possible on higher passes in the Southern Oregon Cascades Thursday night and Friday morning, mainly in the Diamond Lake and Crater Lake areas.

Areas streams and rivers are expected to see rises but flooding is not expected due to the rivers being relatively low to start with.

Winds will also increase over the area as the frontal system moves inland and a mid level jet moves overhead on Thursday. Breezy to gusty south to southwest winds are forecast over the area. Strongest winds are expected over the mountains. Also, gusts to around 40 mph are expected into the southern Shasta Valley Thursday afternoon and in the Summer Lake area Thursday afternoon and evening.

LONG TERM. Friday-Tuesday, December 13-17, 2019 . A fast zonal jet stream (160-180kt at 300 mb) is expected to be aimed at Oregon late this week (Friday). This will keep a steady parade of disturbances from the Pacific into the area through the first half of the weekend. None of these systems is particularly strong, so winds should be held in check and precipitation amounts should be fairly light. One system will pass to our south Friday morning with westerly onshore flow keeping showers going in many areas, especially along the coast and in higher terrain areas that are favored in such flow regimes (Cascades). While snow levels will fall on Friday down to around 4500 feet, snow impacts should be minimal with additional accumulations of only 1-4 inches above 5000 feet.

A brief break between systems is possible Friday night into Saturday morning, but as the core of the jet shifts to the east-southeast into the nation's mid-section, another upper level disturbance will arrive at the coast and move onshore Saturday. This will result in increasing chances for rain/snow Saturday afternoon into Saturday evening. Snow levels will continue to lower to around 3500 feet, but precipitation amounts should be light. Another 1-3 inches of snow is possible for the mountains and some snow may affect Siskiyou/Black Butte Summits Saturday evening.

Colder air will continue to move in behind this system and snow levels will drop to around or just above the lower passes (2500- 3000 feet) by Sunday morning, but model guidance is indicating that precipitation will be largely ending by then with no impacts for the lower elevations. Some showers could linger in NW sections of the CWA Sunday, but most will remain to the north.

Heading into next week, models are showing a brief period of ridging before another disturbance arrives by around Tuesday. -Spilde

AVIATION. For the 11/00Z TAFs . A front moving onshore is bringing light rain to the coast and inland west of the Cascades this evening. This front was able to mix out the lower ceilings/fog from earlier today. Now, most areas are a mix of VFR/MVFR, but with areas of terrain obscured.

Precipitation will become spottier behind the front tonight, but IFR/LIFR will likely return to many of the valleys inland and persist into Wednesday morning. Another front will mix out the lower conditions by Wednesday afternoon with light rain returning to the coast and areas west of the Cascades. -Spilde

MARINE. Updated 230 PM PST Tuesday, 10 December 2019 . A weak front is moving through the waters and bringing increasing south winds and building seas. A stronger front with some gale force winds and steep to very steep seas is expected Wednesday while a high and steep long period west swell builds late Wednesday into Friday. Gales will impact primarily areas from Cape Blanco northward but very steep seas and gusty winds will impact some areas south of Cape Blanco. Winds ease Thursday and seas gradually diminish late Friday into Saturday. However, active weather continues through the weekend with periods of moderate to heavy rain.

Confidence is high for a long-duration west swell of about 17 feet at 17 seconds to impact the coastal waters from Thursday morning into Friday evening. West swell of 17 feet at 17 seconds is expected and will likely impact bar crossings and crab pots. Keene/BR-y

MFR WATCHES/WARNINGS/ADVISORIES. OR . High Surf Advisory from 4 AM Thursday to 7 PM PST Friday for ORZ021-022.

CA . None.

Pacific Coastal Waters . Small Craft Advisory until 4 AM PST Thursday for PZZ350-356-370-376. Small Craft Advisory from 6 AM Thursday to 7 PM PST Friday for PZZ350-356-370-376. Gale Warning from 1 PM Wednesday to 4 AM PST Thursday for PZZ350-356-370-376.

CC/MAS/NSK


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CECC1 - 9419750 - Crescent City, CA 47 mi72 min NE 4.1 G 5.1 48°F 51°F1019.6 hPa
46027 - ST GEORGES - 8NM West Northwest of Crescent City, CA 60 mi36 min ESE 5.8 G 12 50°F 54°F1020.4 hPa45°F
46244 - Humboldt Bay, North Spit, CA 68 mi36 min 54°F6 ft

Wind History for Crescent City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Montague Siskiyou County Airport, CA51 mi73 minN 010.00 miOvercast41°F30°F67%1024.2 hPa

Link to 5 minute data for KSIY

Wind History from SIY (wind in knots)
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Last 24hrS5S5SE4SE7SE4S3CalmS6SE6S3CalmCalmCalmS3CalmCalmNE7N7N7N9NE6CalmCalmCalm
1 day agoCalmCalmCalmCalmE3N8NW3CalmN3NE3CalmCalmSW3CalmCalmW3NE3CalmCalmCalmSE4S5SE3SE4
2 days agoN6NE5NE6NE4N3NE4NE3CalmNE7NE6NE3NE3N5N5NE4CalmCalmCalmCalmCalmCalmSW5SW6SW5

Tide / Current Tables for Crescent City, California
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Crescent City
Click for Map
Tue -- 03:36 AM PST     2.95 feet Low Tide
Tue -- 05:49 AM PST     Moonset
Tue -- 07:32 AM PST     Sunrise
Tue -- 09:41 AM PST     7.58 feet High Tide
Tue -- 04:02 PM PST     Moonrise
Tue -- 04:44 PM PST     -0.20 feet Low Tide
Tue -- 04:45 PM PST     Sunset
Tue -- 11:17 PM PST     5.81 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.14.33.6333.54.45.66.77.47.575.84.12.40.90-0.20.41.52.94.35.35.8

Tide / Current Tables for Crescent City, California (2) (expired 1989-12-31)
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Crescent City
Click for Map
Tue -- 03:35 AM PST     2.94 feet Low Tide
Tue -- 05:49 AM PST     Moonset
Tue -- 07:32 AM PST     Sunrise
Tue -- 09:40 AM PST     7.59 feet High Tide
Tue -- 04:02 PM PST     Moonrise
Tue -- 04:43 PM PST     -0.23 feet Low Tide
Tue -- 04:45 PM PST     Sunset
Tue -- 11:16 PM PST     5.79 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.14.33.5333.54.45.66.77.47.675.74.12.40.9-0-0.20.41.52.94.35.35.8

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Medford, OR (19,4,5,8)
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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 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.