Saturday, May30, 2020
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Marine Weather and Tides
Yreka, 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 5:35AMSunset 8:41PM Saturday May 30, 2020 4:58 PM PDT (23:58 UTC) Moonrise 12:32PMMoonset 1:22AM Illumination 64% Phase: Waxing Gibbous; Moon at 9 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- 244 Pm Pdt Sat May 30 2020
Tonight..N winds 5 to 10 kt. Waves nw 5 ft at 11 seconds... And sw 2 ft at 16 seconds. Showers.
Sun..N winds 5 to 15 kt. Waves N 7 ft at 5 seconds...and sw 2 ft at 15 seconds.
Sun night..N winds 5 to 15 kt. Waves N 6 ft at 7 seconds... And S 2 ft at 15 seconds.
Mon..N winds 5 to 15 kt. Waves N 7 ft at 7 seconds.
Mon night..N winds 10 to 20 kt. Waves N 8 ft at 8 seconds.
Tue..N winds 10 to 20 kt. Waves N 7 ft at 8 seconds.
Wed..N winds 10 to 20 kt. Waves N 7 ft at 7 seconds...and N 3 ft at 14 seconds.
Thu..N winds 10 to 15 kt. Waves N 7 ft at 7 seconds...and nw 5 ft at 13 seconds.
PZZ400 244 Pm Pdt Sat May 30 2020
Synopsis for northern california waters..Northerlies will continue to redevelop over the coastal zones through this evening. Northerly winds and steeper, short-period seas will increase on Sunday and into next week. Otherwise, a mid-period northwest swell will continue to slowly diminish through early next week and a longer-period southwest swell will linger throughout portions of the waters over the next several days.


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 302155 AFDMFR

Area Forecast Discussion National Weather Service Medford OR 255 PM PDT Sat May 30 2020

DISCUSSION. Models have been advertising the potential for storms for several days now, and today's storms panned out generally as expected. Early this morning about 200 cloud to ground lightning flashes impacted areas west of I-5, in the Kalmiopsis and northward into the Umpqua Basin. Then, on the northern periphery of the rain shield more storms developed later in the morning, impacting Jackson, Douglas, and Central and Eastern Siskiyou Counties. These later storms were strong and featured heavy rain and plenty of lightning. A few hours later, severe storms impacted areas along and just east of Highway 97. Golf ball sized hail was reported from one of the storms. In total, about 900 cloud to ground lightning flashes were observed over our 9-county warning area since early this morning. The threat of severe storms is diminishing this afternoon as stability increases from west to east through the evening.

Active weather will be on the decrease this evening with most, if not all of the action north of our forecast area. Still could not rule out isolated storms in northern Klamath and Lake County early this evening with gusty winds, but we don't think any of them will be severe.

The upper trough axis will shift to the north later this evening and tonight with showers decreasing later this evening and overnight tonight. Low temperatures tonight for inland areas will end up cooler.

Sunday should be a dry day for most hours and locations as weak shortwave riding builds in. However there may be enough instability for a few isolated showers late in the afternoon and early evening in portions of the Cascades and eastside. Kept in a slight chance of thunder near and over the Warners in eastern Modoc county where instability will be a little greater.

Weak troughiness remains over the area tonight into Monday and could not rule out isolated showers along the Cascades and parts of the east side. Isolated thunderstorms are also possible Monday afternoon and evening for the eastside.

The general consensus is for the upper trough off the California coast to become split off from the main flow and move south off the California Coast Monday night through Thursday. Therefore, we could catch a break in the weather Tuesday, Wednesday and Thursday. In addition, the majority of the individual ensemble members (GFS and ECMWF) continue to show no measurable precipitation which has been the case for the past several model runs. Thus, Confidence is becoming higher for drier conditions Tuesday-Thursday. Pops have been reduced during this time period and may need to be reduced even further should all the data continues to support dry conditions. Also max temperatures were adjusted higher.

Friday, The operational ECMWF and GFS show a deeper upper trough approaching from the Pacific but differ with the strength (the ECMWF digs the upper trough further south). Either way, it will result in some cooling and a better chance for showers towards the end of the week mainly east of the Cascades Friday afternoon and night. Next Saturday looks cooler and unsettled with a better chance for showers almost everywhere and a slight chance of afternoon and evening thunderstorms for portions of the eastside. Of note: The majority of the individual GFS and ECMWF ensemble members show measurable precipitation next Friday and Saturday. -Petrucelli

AVIATION. For the 30/18Z TAF Cycle . A low moving over the area will shift north tonight. Along the coast, showers have decreased in coverage but areas of MVFR cigs and local IFR cigs will continue this afternoon, becoming widespread this evening. Widespread showers will continue inland into this evening from the Cascades west with continued areas of MVFR cigs and mountain obscurations. A slight chance of thunderstorms is also expected for inland areas from Cascades west through this afternoon. For locations east of the Cascades, expect mainly VFR with MVFR cigs in scattered showers and isolated thunderstorms into this evening. Strong gusty winds will continue through early evening across Lake county with visibility reductions with areas of blowing dust east of Summer Lake and Fort Rock. Overnight into Sunday morning, areas of MVFR cigs and local IFR cigs are expected, especially in valleys west of the Cascades and along the coast, where there has been significant rainfall. -CC

MARINE. Updated 200 PM PDT Saturday 30 May 2020 . A low moving up from the south will shift northeastward tonight. Showers will diminish late this evening and tonight. Seas will be dominated by west swell through Sunday morning. Gusty north winds and steep, short period seas will develop across the waters Sunday afternoon and evening then continue into early next week. Strong north winds and very steep seas may develop for areas south of Port Orford Monday afternoon through Tuesday. Then gusty north winds and steep seas are expected to continue through at least mid week. -CC

FIRE WEATHER. Updated 220 PM PDT Saturday, 30 May 2020 . 883 cloud to ground lightning flashes have been observed since early this morning across the forecast area. Lightning production has sharply diminished over the past few hours as stability increases from west to east. The area of heavier rain will continue through the afternoon west of the Cascades and then diminish, leaving many 1- inch rainfall totals in its wake. From the Cascades eastward, rain will move overhead as the low opens up and moves northeast overnight. Much lighter amounts are expected east of the Cascades compared to west of the Cascades.

The conditions that follow the lightning are so important, and the trends for Sunday are clearly warmer and drier than today, and a warming and drying trend should continue through Wednesday. Temperatures should peak Wednesday at about 10 degrees above normal, and this is about 10 degrees cooler than the hot temperatures that were observed in recent days. Afternoon breezes tomorrow should be lower than normal, but winds will increase some ahead of the next upper trough. The driest and breeziest days look to be Tuesday and Wednesday before another system brings cooler conditions and more potential for rain and possibly thunderstorms late week into the weekend. Confidence is moderate at this time for this return to cooler and wetter conditions. Keene

MFR WATCHES/WARNINGS/ADVISORIES. OR . Blowing Dust Advisory until 7 PM PDT this evening for ORZ030-031. Wind Advisory until 8 PM PDT this evening for ORZ030-031.

CA . Wind Advisory until 8 PM PDT this evening for CAZ085.

Pacific Coastal Waters . Small Craft Advisory from 2 PM Sunday to 11 AM PDT Monday for PZZ350-356-370-376. Hazardous Seas Watch from Monday morning through late Tuesday night for PZZ356-376.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CECC1 - 9419750 - Crescent City, CA 82 mi59 min SSW 8.9 G 11 53°F 58°F1015.4 hPa (+0.3)
46027 - ST GEORGES - 8NM West Northwest of Crescent City, CA 92 mi39 min NW 3.9 G 5.8 51°F1016 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 mi66 minSSW 510.00 miMostly Cloudy60°F51°F72%1012.7 hPa

Link to 5 minute data for KSIY

Wind History from SIY (wind in knots)
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Last 24hrCalmSW3S6NE8N7NE43CalmW35W4N6CalmCalmSW3S8S15S16S8S15
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1 day ago5W6N11NW7N9W13SE3CalmS3CalmN5CalmNE6CalmCalmCalmCalmCalmW4Calm4S44NW4
2 days agoE33N12N14N16N8N8N8N7NE5NE7NE6CalmCalmCalmN333Calm5W5--NW4Calm

Tide / Current Tables for Crescent City, California (2) (expired 1989-12-31)
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Crescent City
Click for Map
Sat -- 12:23 AM PDT     2.79 feet Low Tide
Sat -- 02:28 AM PDT     Moonset
Sat -- 05:45 AM PDT     Sunrise
Sat -- 05:50 AM PDT     5.38 feet High Tide
Sat -- 12:39 PM PDT     0.03 feet Low Tide
Sat -- 01:38 PM PDT     Moonrise
Sat -- 07:34 PM PDT     6.02 feet High Tide
Sat -- 08:44 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.82.93.344.75.25.454.23.11.90.80.20.10.61.62.94.25.35.965.54.63.6

Tide / Current Tables for Crescent City, California
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Crescent City
Click for Map
Sat -- 12:23 AM PDT     2.81 feet Low Tide
Sat -- 02:28 AM PDT     Moonset
Sat -- 05:45 AM PDT     Sunrise
Sat -- 05:49 AM PDT     5.37 feet High Tide
Sat -- 12:39 PM PDT     0.03 feet Low Tide
Sat -- 01:38 PM PDT     Moonrise
Sat -- 07:35 PM PDT     6.00 feet High Tide
Sat -- 08:44 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.82.93.344.75.25.454.23.11.90.80.20.10.61.62.94.25.35.965.54.63.6

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
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 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.