Sunday, December15, 2019
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Marine Weather and Tides
Oroville, 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 7:17AMSunset 4:44PM Sunday December 15, 2019 7:26 AM PST (15:26 UTC) Moonrise 8:32PMMoonset 10:28AM Illumination 85% Phase: Waning Gibbous; Moon at 19 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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7 Day Forecast for Marine Location Near Oroville, CA
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location: 39.5, -121.57     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 151058 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 258 AM PST Sun Dec 15 2019

SYNOPSIS. Scattered snow showers over the Sierra will linger overnight with drier weather returning to the region for Sunday into early next week. A weak system moves through mid-week with additional precipitation chances into next weekend.

DISCUSSION. With the base of the shortwave trough already into central Nevada, much of the snow shower activity over the Sierra has begun to wind down. Recent KDAX radar imagery does show some weak echoes, mainly south of Highway 50. With cold advection in the wake along with decreasing cloud cover, many Valley locations have cooled off considerably relative to previous days. Current overnight temperatures run from the mid 30s across the northern Sacramento Valley to the mid 40s in the northern San Joaquin Valley given a bit more wind. The light breezes may inhibit any pronounced fog development with the GOES-17 nighttime fog product supporting this notion. 06Z HREF probabilities show some enhanced values from Marysville southward to near Stockton so have kept patchy fog in the forecast through mid-morning.

Today will mark the start of a brief period of dry weather across northern California which continues through Tuesday. High temperatures remain rather close to climatology with some cool mornings ahead. Decreasing winds and cloud cover support readings in the 30s across the Valley, roughly 2 to 4 degrees below average. The usual cool spot will be mountain locales as overnight lows regularly drop into the teens and 20s. Overall, expect some patchy Valley fog to form each morning given the amount of moisture on surfaces, especially from north of Sacramento down to Turlock.

There will likely be an increase in cloud cover Tuesday ahead of a closed low offshore. Warm advection precipitation is forecast to reach western portions of the Valley, Coastal Range, and Delta region by late Tuesday night. The guidance has continued to struggle with the handling of the system and how much impact it will have. A number of GFS runs favor a wetter scenario, particularly I-80 southward while the ECMWF has either been dry, or more recently carries light precipitation. Will continue to favor a low impact event with lower Valley rainfall amounts and minimal issues across the mountains. Future model cycles will hopefully iron out these differences in the upcoming days. ~BRO

EXTENDED DISCUSSION (Thursday THROUGH Sunday). Ensembles in reasonable agreement that short-wave ridging will amplify and shift east later this week as upstream trough deepens over the eastern Pacific. Precipitation chances remain focused across the far northern portion of the forecast area along a nearly stationary frontal boundary late in the week, but both GFS and EC ensembles indicate an upswing in QPF later Saturday into Sunday as a cold front finally swings onshore ahead of the approaching trough. Snow levels forecast to lower to around 3500-4500 feet on Sunday leading to an increasing risk for travel impacts across the mountain passes.

AVIATION. VFR conditions predominate the next 24 hours except for local MVFR vicinity scattered -SHSN over the northern Sierra Nevada until around 14Z, and local MVFR conditions in the Central Valley 14Z- 19Z. Surface winds at TAF sites remain under 10 knots.

STO WATCHES/WARNINGS/ADVISORIES. Winter Weather Advisory until 4 AM PST early this morning for West Slope Northern Sierra Nevada-Western Plumas County/Lassen Park.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SFXC1 - San Francisco Bay Reserve, CA 93 mi102 min WNW 5.1 41°F 1020 hPa38°F

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oroville Municipal Airport, CA3 mi34 minENE 310.00 miFair39°F35°F86%1021.8 hPa

Link to 5 minute data for KOVE

Wind History from OVE (wind in knots)
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Last 24hrCalmCalmSW4NW5CalmSW3CalmCalmCalmSE7SW3S6SW6S3SE5CalmCalmCalmCalmCalmE4E5CalmE3
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2 days agoSE7SE8S9--SE9SE8SE11SE10SE5E3E4E5E5E4E4E3CalmCalmCalmCalmCalmCalmS3SE6

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
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Sun -- 04:58 AM PST     -0.23 feet Low Tide
Sun -- 07:16 AM PST     Sunrise
Sun -- 10:16 AM PST     2.37 feet High Tide
Sun -- 10:25 AM PST     Moonset
Sun -- 04:31 PM PST     0.82 feet Low Tide
Sun -- 04:45 PM PST     Sunset
Sun -- 08:27 PM PST     3.15 feet High Tide
Sun -- 08:34 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.610.50.1-0.2-0.200.71.52.12.42.32.11.71.310.80.91.42.43.13.12.92.5

Tide / Current Tables for Clarksburg #4, Sacramento River, California
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Clarksburg #4
Click for Map
Sun -- 03:28 AM PST     -0.23 feet Low Tide
Sun -- 07:16 AM PST     Sunrise
Sun -- 09:07 AM PST     2.37 feet High Tide
Sun -- 10:24 AM PST     Moonset
Sun -- 03:01 PM PST     0.82 feet Low Tide
Sun -- 04:46 PM PST     Sunset
Sun -- 07:18 PM PST     3.15 feet High Tide
Sun -- 08:34 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.3-0-0.2-0.20.211.72.22.42.321.61.20.90.811.72.63.13.12.82.41.8

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Sacramento, CA (10,2,3,4)
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Ground Weather Radar Station Beal AFB, CA
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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 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.