Thursday, March4, 2021
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Marine Weather and Tides
Yreka, CA

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:38AMSunset 6:06PM Thursday March 4, 2021 2:06 AM PST (10:06 UTC) Moonrise 12:00AMMoonset 9:53AM Illumination 68% Phase: Waning Gibbous; Moon at 20 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- 859 Pm Pst Wed Mar 3 2021
.small craft advisory in effect from 6 am pst Thursday through Thursday afternoon...
.gale warning in effect from Thursday afternoon through late Thursday night...
Tonight..S winds 10 to 20 kt. Waves nw 9 ft at 13 seconds... And nw 5 ft at 20 seconds.
Thu..S winds 20 to 30 kt. Waves S 12 ft at 10 seconds...and nw 11 ft at 18 seconds. Chance of rain.
Thu night..S winds 20 to 30 kt. Waves S 13 ft at 10 seconds... And nw 11 ft at 17 seconds. Rain likely.
Fri..S winds 15 to 25 kt. Waves S 11 ft at 10 seconds...and W 11 ft at 16 seconds.
Fri night..S winds 5 to 10 kt. Waves W 4 ft at 9 seconds... And W 12 ft at 16 seconds.
Sat..S winds 5 to 10 kt. Waves W 10 ft at 14 seconds.
Sun..S winds 5 to 10 kt. Waves W 13 ft at 15 seconds.
Mon..S winds 10 to 15 kt. Waves W 4 ft at 6 seconds...and nw 7 ft at 15 seconds.
PZZ400 859 Pm Pst Wed Mar 3 2021
Synopsis for northern california waters..The current nw swell will continue to slowly decay tonight. An approaching front will turn winds sharply southerly after midnight. This will bring widespread sustained gale force southerlies with gusts reaching storm force on Thursday, along with large and chaotic seas heading into the weekend.


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 040521 AAA AFDMFR

Area Forecast Discussion National Weather Service Medford OR 921 PM PST Wed Mar 3 2021

DISCUSSION. 04/00Z NAM in. 04/00Z GFS in through 84hr.

Lots of low cloud over the coastal waters, along the coast, and in the coastal valleys this evening, along with some high clouds over the east side and offshore. In between, mostly clear skies prevail for now.

A transition to a low index pattern is underway as a long wave upper level trough digs near 140W and the upstream ridge amplifies over the central U.S. Flow aloft over the Medford forecast area is becoming southwesterly and that flow will increase as the long wave trough approaches the coast.

While the pattern will be progressive, it will be very slow. The upper trough will weaken as it approaches the coast, and what's left of it will move onshore Saturday morning. The associated front will move into the coastal waters Thursday afternoon. It will stall as it becomes parallel to the steering flow and weak waves move north along the frontal boundary. The front will finally move onshore Friday morning.

The main impact of this front will be winds. A High Wind Warning is in effect for the coast, Shasta Valley, and portions of the east side. See NPWMFR for details. Winds will peak during the daytime hours on both Thursday and Friday, but will remain gusty through Thursday night.

Rain will be likely at the immediate coast by late Thursday afternoon, progressing to the Coast Range by sunrise Friday morning, the Cascades by Friday evening, and across the east side Friday night into Saturday morning. Storm total precipitation amounts of about 2 to 3 inches is expected at the coast, a quarter of an inch to an inch for most inland west side locations, and a tenth to a half inch for the east side. The impact of snow is a significant forecast challenge due to warm ground temperatures, along with late season longer days/shorter nights. Friday night will be the main period of interest for snowfall impacts with snow levels forecast to drop from around 5500 feet to a range of 3000 to 4000 feet. Storm snow totals of 3 to 6 inches of snow are expected for the Cascades and generally an inch on the east side. Higher amounts (around 6 to 12 inches) are expected for the high peaks of Siskiyou County, generally above 5000 feet.

Long term discussion from the Wednesday afternoon AFD . Sat 06 Mar through Wed 10 Mar 2021. Not much has changed in the overall scheme of things. Confidence is high the active pattern will continue during the extended forecast period. However it may not be all that bad overall this coming weekend. It won't be completely dry, but there could be larger periods of dry time. By next week, storms originating from the Gulf of Alaska will drop down into the Pacific northwest. Typically these result in cooler and unsettled weather.

Saturday, the upper trough shifts east of the area during the morning and we could actually catch a relative break in the action from Saturday afternoon through Saturday evening as weak ridging builds into the area. This break could carry over to Saturday night before the next front arrives Sunday. However the operational ECMWF and GFS suggest the front on Sunday will weaken as it moves inland, thus limiting the amount of precipitation, especially inland away from the coast and coastal mountains. This is also being supported by the ensembles and individual ensemble members.

The pattern will become more active Monday through Wednesday as an upper trough from the Gulf of Alaska drops over the forecast area with multiple systems moving through. The exact timing this far out will likely change over time. However we are confident they will be continued cool and wet. Not only the operational ECMWF and GFS show this, but so do the individual ensemble members of the ECMWF and GEFS. Precipitation amounts during this time are not expected to be significant at any one time which will help to limit road snow concerns, especially during the daylight hours. Some snow will accumulate at night for the higher passes and possibly the lower passes on I-5 between Grants Pass and Canyonville. However, since its early to mid March, the longer daylight hours and higher sun angle should result in little or no road snow for the lower passes at least during the daytime. -Petrucelli

AVIATION. For the 04/06Z TAF Cycle . Along the coast and just offshore, MVFR CIGS are occurring offshore and have moved onto the coast. The MVFR CIGS are expected to lift back to VFR Thursday morning. Gusty winds from the south or southwest will begin tomorrow morning lasting through the day.

Inland westside . expect VFR to continue through the TAF period with the exception of some MVFR/IFR CIGS banking around the terrain in the Umpqua Basin and at KRBG. Gusty winds will also be occurring in most north-south oriented valleys, especially funneling into the Rogue and Shasta Valleys. Despite the increase in winds in the Umpqua Valley, wind shear may be possible in the Illinois Valley and at KRBG, although confidence was too low to add them to the TAFs.

Elsewhere, VFR conditions will prevail through the TAF period. South winds will increase at Klamath Falls towards the end of the TAF period. -Schaaf

MARINE. Updated 700 PM PST Wednesday 03 Mar 2021 . Buoy data outages continue, preventing comparisons of the forecast to current conditions, so the forecast as well as this update is based almost entirely on model data.

Light northerly winds will shift to the south this evening as high pressure weakens and a strong, slow moving frontal system approaches from the eastern Pacific. The storm will move into the region tonight into Thursday, with strong Gales and periods of Storm force winds expected Thursday and Friday, along with very steep wind driven seas in excess of 20 feet. While Storm conditions should remain beyond 10 nm from shore, Storm force gusts are possible elsewhere, especially in the vicinity of headlands and capes.

Combined seas are now expected to peak in the 20 to 27 foot range Thursday night into Friday morning as those very steep southerly wind seas combine with moderate northwest swell at 17 seconds. The highest combined sea heights are most likely to occur about 20NM west of Bandon and the lowest along and near protected portions of the coast.

Wave models continue to decrease the threat of long-period large swells early next week, but steep seas appear likely, with seas in excess of 10 feet expected for much of the week as additional systems pass through the region. -BPN

MFR WATCHES/WARNINGS/ADVISORIES. OR . High Wind Warning from 10 AM Thursday to 10 AM PST Friday for ORZ021-022. High Surf Advisory from noon Thursday to noon PST Friday for ORZ021-022. High Wind Warning from 1 PM Thursday to 7 PM PST Friday for ORZ030-031. Wind Advisory from 10 AM Thursday to 1 PM PST Friday for ORZ026.

CA . High Wind Warning from 10 AM Thursday to 7 PM PST Friday for CAZ081.

Pacific Coastal Waters . Gale Warning from 1 AM Thursday to 10 AM PST Friday for PZZ350-356-370-376. Storm Warning from 1 PM Thursday to 10 AM PST Friday for PZZ370-376.

15/15/13


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CECC1 - 9419750 - Crescent City, CA 82 mi54 min SSE 14 G 17 47°F 49°F1015.5 hPa
46027 - ST GEORGES - 8NM West Northwest of Crescent City, CA 92 mi36 min SSE 18 G 23 49°F1015.3 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 mi73 minNE 310.00 miFair30°F19°F64%1014.5 hPa

Link to 5 minute data for KSIY

Wind History from SIY (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW6CalmNW3CalmW3E4--CalmE3S35NE3Calm
1 day agoNE8NE7N3E3CalmCalmCalmCalmCalmE3CalmCalm3W4CalmNE3NE6E4NE6N3CalmCalmCalmW3
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Tide / Current Tables for Crescent City, California (2) (expired 1989-12-31)
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Crescent City
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Thu -- 02:51 AM PST     7.44 feet High Tide
Thu -- 06:46 AM PST     Sunrise
Thu -- 09:41 AM PST     0.39 feet Low Tide
Thu -- 09:58 AM PST     Moonset
Thu -- 03:57 PM PST     5.34 feet High Tide
Thu -- 06:11 PM PST     Sunset
Thu -- 09:17 PM PST     2.37 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.96.27.27.475.84.32.71.40.60.40.923.24.35.15.35.14.43.52.82.42.53.1

Tide / Current Tables for Crescent City, California
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Crescent City
Click for Map
Thu -- 02:52 AM PST     7.42 feet High Tide
Thu -- 06:46 AM PST     Sunrise
Thu -- 09:42 AM PST     0.37 feet Low Tide
Thu -- 09:58 AM PST     Moonset
Thu -- 03:58 PM PST     5.31 feet High Tide
Thu -- 06:11 PM PST     Sunset
Thu -- 09:18 PM PST     2.38 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.96.27.17.475.84.32.71.40.50.40.91.93.14.35.15.354.43.52.82.42.53.1

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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