Friday, November27, 2020
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Marine Weather and Tides
Yreka, CA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:14AMSunset 4:42PM Friday November 27, 2020 2:46 PM PST (22:46 UTC) Moonrise 3:34PMMoonset 4:30AM Illumination 94% Phase: Waxing Gibbous; Moon at 13 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- 813 Am Pst Fri Nov 27 2020
Today..NW winds 5 to 10 kt. Waves N 3 ft at 6 seconds...and nw 8 ft at 16 seconds.
Tonight..N winds 5 kt. Waves nw 9 ft at 16 seconds.
Sat..N winds 5 to 10 kt. Waves N 3 ft at 5 seconds...and nw 8 ft at 14 seconds.
Sat night..NE winds 5 to 10 kt. Waves W 7 ft at 13 seconds.
Sun..S winds 5 to 10 kt. Waves nw 7 ft at 15 seconds.
Mon..NE winds 5 to 10 kt. Waves nw 12 ft at 16 seconds.
Tue..N winds 5 to 10 kt. Waves N 3 ft at 8 seconds...and nw 8 ft at 14 seconds.
PZZ400 813 Am Pst Fri Nov 27 2020
Synopsis for northern california waters..A large northwest swell will continue to subside through late morning. However, another long period northwesterly swell will begin to build through the waters today and Saturday, with a more significant swell expected on Monday.


7 Day Forecast for Marine Location Near Yreka, CA
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location: 41.75, -122.64     debug


Area Discussion for - Medford, OR
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FXUS66 KMFR 272200 AFDMFR

Area Forecast Discussion National Weather Service Medford OR 200 PM PST Fri Nov 27 2020

DISCUSSION. 27/12Z NAM/GFS in.

Most of the low clouds and fog have burned off this afternoon, but some of it is still hanging in there over the Rogue and Umpqua Basins. Other than that, there are only scattered high clouds moving through the area.

The ridge axis is breaking to the east of the area. A weak short wave embedded in the flow will move onshore Saturday, and it will push a weak front onshore with it. This system won't affect the Medford forecast area much. At this point it looks like any precipitation will be limited to the coastal waters west of Florence. The north coast around Reedsport may get some very light precipitation from this front, but it will more likely remain dry there. No precipitation is expected over the remainder of the Medford forecast area. There may be a bit of an onshore push Saturday, but it likely will not be enough to change the weather conditions over the inland areas.

Weak ridging will return Saturday night into Sunday. This will allow the stagnant conditions to continue. Inversions over the valleys will be slow to burn off in the daytime and some areas may not clear at all. Winds in the valleys will be light, but above the inversions, dry easterly flow aloft will keep the ridges clear and relatively warm.

A stronger short wave will move in Monday, and this will push a front onshore late Sunday night into Monday. This will be the most significant system between now and next Friday, but it will also be on the weak side.

There will be a good chance of rain from the coast to the Cascades, but amounts will be light. The current forecast shows the most likely precipitation amount to be about 0.10-0.25 of an inch at the coast and over to the Cascades north of Crater Lake with lesser amounts to the south and east. This would bring an inch or less of snow to areas above 4500 feet in the Cascades. The front will weaken as it moves east of the Cascades, so precipitation chances will diminish to less than 10% in parts of Modoc/eastern Lake Counties. The main effect of this front over most of the areas will be to induce some mixing in the air mass, enough to end the Air Stagnation Advisory currently in effect.

However, ridging, and air stagnation, will return, as another ridge will build into the area Monday.

Extended discussion . Tue 01 Dec through Friday night 06-07 Dec 2020. Strong upper level ridging will be the dominant weather driver during the extended period. This means another period of stagnant weather with dry conditions and overnight/morning fog for west side valleys. The deterministic GFS/EC solutions attempt to bring fronts into the area, but they all wash out as they move into the strong ridge. Model ensembles and cluster analysis support dry conditions during this time and lend to high confidence in this pattern. This pattern isn't likely to change through at least next weekend. /BR-y

AVIATION. For the 27/18Z TAFs . Widespread IFR/LIFR conditions persist across west side valleys and into the Klamath Basin, including KLMT. Some improvement is expected by the afternoon hours, but confidence in timing and extent of that improvement is low at this time. While low clouds may linger well into the afternoon hours, confidence is higher for improvement in visibilities. It's possible that some valleys remain socked in through the afternoon and continuing through the TAF period. Even if clearing does occur, expect IFR/LIFR conditions to return tonight.

Elsewhere, VFR conditions prevail, including over the coastal waters, and is expected to do so through the TAF period. /BR-y

MARINE. Updated 200 PM PST Friday 27 Nov 2020 . Seas will remain steep through Saturday morning. A weak cold front will dissipate over the waters north of Cape Blanco on Saturday with seas diminishing into Sunday. A warm front will brush past to the north late Sunday, followed by a strong cold front late Sunday night into Monday morning. Gusty south winds and a building long period northwest swell will accompany this frontal passage with steep seas hazardous to small craft.

Seas are expected to peak on Monday afternoon with a heavy long- period northwest swell of 13 to 16 feet at 15 to 17 seconds. Seas are expected to diminish Tuesday into Wednesday but a thermal trough will develop at the coast with seas likely remaining steep as north north winds increase over the waters. -DW

MFR WATCHES/WARNINGS/ADVISORIES. OR . Air Stagnation Advisory until 11 AM PST Monday for ORZ023>031.

CA . None.

Pacific Coastal Waters . Small Craft Advisory until 10 AM PST Saturday for PZZ350-370-376.

15/03/16


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CECC1 - 9419750 - Crescent City, CA 82 mi46 min SSW 4.1 G 6 54°F 51°F1022.2 hPa (-1.4)
46027 - ST GEORGES - 8NM West Northwest of Crescent City, CA 92 mi26 min NNW 1.9 G 5.8 53°F1022.9 hPa

Wind History for Crescent City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Montague Siskiyou County Airport, CA9 mi53 minN 010.00 miFair45°F30°F56%1028.9 hPa

Link to 5 minute data for KSIY

Wind History from SIY (wind in knots)
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Last 24hrCalmCalmCalmE6W4N3NW3CalmCalmCalmCalmCalmCalmCalmSE3CalmCalmCalmE3W3CalmCalmCalmCalm
1 day agoNW7NW6NE6CalmCalmCalmN4E3W5CalmCalmCalmE3CalmCalmN3CalmCalmCalmCalmSW3S4CalmCalm
2 days ago3CalmCalmCalmCalmE7S8SW4CalmSW4N7CalmCalmNW7N4SW3CalmW5SW4SW33S3NW3N6

Tide / Current Tables for Crescent City, California (2) (expired 1989-12-31)
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Crescent City
Click for Map
Fri -- 03:07 AM PST     2.48 feet Low Tide
Fri -- 04:36 AM PST     Moonset
Fri -- 07:20 AM PST     Sunrise
Fri -- 09:20 AM PST     7.12 feet High Tide
Fri -- 03:39 PM PST     Moonrise
Fri -- 04:11 PM PST     0.56 feet Low Tide
Fri -- 04:48 PM PST     Sunset
Fri -- 10:31 PM PST     5.54 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.33.52.82.52.73.44.45.66.67.176.253.52.110.60.81.62.73.94.95.55.5

Tide / Current Tables for Crescent City, California
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Crescent City
Click for Map
Fri -- 03:09 AM PST     2.49 feet Low Tide
Fri -- 04:36 AM PST     Moonset
Fri -- 07:20 AM PST     Sunrise
Fri -- 09:21 AM PST     7.12 feet High Tide
Fri -- 03:39 PM PST     Moonrise
Fri -- 04:12 PM PST     0.56 feet Low Tide
Fri -- 04:48 PM PST     Sunset
Fri -- 10:33 PM PST     5.57 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.43.52.82.52.73.44.45.66.67.176.253.52.110.60.81.52.73.94.95.55.5

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station Medford, OR
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weather_mapweather_map weather_map


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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.