Friday, August14, 2020
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Marine Weather and Tides
Sheridan, 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 6:17AMSunset 8:02PM Friday August 14, 2020 3:35 AM PDT (10:35 UTC) Moonrise 12:40AMMoonset 3:53PM Illumination 21% Phase: Waning Crescent; Moon at 25 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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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 241 Am Pdt Fri Aug 14 2020
Today..SW winds 5 to 15 kt.
Tonight..SW winds up to 10 kt.
Sat..SW winds 10 to 20 kt with gusts up to 25 kt.
Sat night..SW winds 5 to 15 kt.
Sun..SW winds 5 to 15 kt with gusts up to 25 kt.
Sun night..SW winds 5 to 15 kt.
Mon..W winds 10 to 20 kt with gusts up to 25 kt.
Tue..W winds 10 to 20 kt with gusts up to 25 kt.
PZZ500 241 Am Pdt Fri Aug 14 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Scattered showers are over the southern waters and moving northward. Lightning activity has decreased on radar, but there remains a slight chance for an isolated Thunderstorm through Friday afternoon, with the potential for locally gusty winds and rough seas near these storm cells. Moderate northwest winds are expected over the northern waters through the weekend. Prevailing seas remain mixed with a short period northwest swell and a longer period southerly swell.


7 Day Forecast for Marine Location Near Sheridan, CA
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location: 38.97, -121.35     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 140906 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 206 AM PDT Fri Aug 14 2020

SYNOPSIS. Dangerous and prolonged heatwave will impact the region through the middle of next week. Daytime temperatures will be 10 to 20 degrees above normal with limited overnight relief. Slight chance of afternoon thunderstorms over the mountains this weekend into Monday.

DISCUSSION. The dangerous and prolonged heatwave arrives today. Excessive Heat Warning goes into effect for the entire Central Valley beginning this afternoon, and continues through through 9 PM PDT next week Wednesday.

A strong and broad upper level ridge residing over the Desert Southwest and Great Basin is responsible for this extended period of excessive heat. Temperatures at 850 mb will warm to the 27 to 30 deg C range over the weekend and into the first half of next week, and will result in maximum surface temperatures on the order of 100 to 110 deg F Valley-wide. Ensemble means from the ECMWF and GFS even suggest a remarkable 110+ for the Sacramento area around Monday/Tuesday. It's quite conceivable that Sacramento could match/exceed 105 for six consecutive afternoons, and perhaps 10 days at/above 100. These highs equate to about 10 to 20 deg F above middle August climatology. Overnight lows will be oppressive as temperatures hold in the 70s to low 80s well into next week.

Subtropical moisture will continue to entrain in the clockwise flow around this upper level ridge, and will bring periodic mid/high clouds to the region through the weekend. This moisture could help initiate some isolated mountain thunderstorms near the Sierra crest through Monday afternoon. Furthermore, these clouds could help dampen peak temperatures through Sunday, but conversely, would also hold overnight minimum temperatures higher than officially forecast. Regardless, it will be hot - extremely and dangerously hot for an extended period of time, even for Central Valley summer standards. The heat risk will be high to very high for much of the region through at least Wednesday of next week.

This will not be a short-lived heatwave. The Excessive Heat Warning is in effect for six days and five nights through next week Wednesday 9 PM PDT. A combination of the extended duration, relentless afternoon heat, and poor overnight cooling is what will compound the severity of this heatwave. Heat is the number one weather-related killer in the United States. Take the necessary precautions to protect yourself from this extreme heat:

* Stay hydrated and avoid caffeinated and alcoholic beverages. * Use air conditioning. * Take frequent breaks in the shade if you must be outdoors. * Wear light-colored and lightweight clothing. * Recognize the signs and symptoms of heat exhaustion and heat stroke. A heat stroke is a medical emergency; dial 9-1-1! * Check up on neighbors and relatives. * Ensure pets and livestock have shelter and water. * Never leave a person or pet unattended in a parked vehicle: look before you lock! * Wear a life jacket in the water.

Please be safe, and beat the heat!

// Rowe

EXTENDED DISCUSSION (Tuesday THROUGH Friday). Minimal changes to the extended forecast as models continue to depict high pressure dominating the forecast. Unfortunately, this means we'll see triple digit heat for the Valley and foothills through the extended period. Guidance does show a broad trough slowly digging into western BC; however, we'll still be experiencing the influence of high pressure. The "good" news is that this will drop high temperatures by a few degrees, with most areas being in the 100 to 105 range on Friday. Overnight lows during this time frame are expected to be miserable as well, with most areas ranging from the 70s to near 80s.

With that being said, it's important to re-iterate the danger of this heat event. Know the signs of heat illness, drink plenty of water, stay in air-conditioned rooms, check on your neighbors, the elderly, children and pets. If you're traveling with children and/or pets, look before you lock ever leave so that they're never left unattended in vehicles.

This very dangerous heat event will have impacts on the general population. Please learn the symptoms of excessive heat exposure, drink plenty of water, stay in an air-conditioned rooms, and never leave pets and children unattended in vehicles.

Some moisture will remain in place over the area on Tuesday. This will lead to some instability over the higher elevations. There is no forcing but the terrain could be enough to kick off an isolated storm or two in the afternoon near the Sierra crest. No thunderstorms are expected after Tuesday.

AVIATION.

Quiet conditions are forecast of interior northern CA for the next 24 hours. Expect to see VFR conditions with winds generally below 12 kt.

STO WATCHES/WARNINGS/ADVISORIES.

Excessive Heat Warning from noon today to 9 PM PDT Wednesday for Carquinez Strait and Delta-Central Sacramento Valley-Motherlode- Mountains Southwestern Shasta County to Western Colusa County- Northeast Foothills/Sacramento Valley-Northern Sacramento Valley- Northern San Joaquin Valley-Southern Sacramento Valley.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SFXC1 - San Francisco Bay Reserve, CA 64 mi111 min SSW 4.1
PCOC1 - 9415144 - Port Chicago, CA 73 mi48 min SSW 5.1 G 8 75°F 72°F1011.5 hPa
RCMC1 - 9414863 - Richmond, CA 92 mi48 min S 1.9 G 5.1 67°F

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lincoln Regional Karl Harder Field, CA4 mi41 minE 610.00 miFair72°F51°F50%1011.2 hPa
Marysville, Beale Air Force Base, CA13 mi4.6 hrsSE 710.00 miFair86°F48°F28%1011.7 hPa
Auburn Municipal Airport, CA14 mi41 minN 010.00 miFair75°F46°F36%1014.6 hPa
Marysville, Yuba County Airport, CA15 mi43 minNNE 310.00 miFair74°F54°F50%1011.5 hPa
Sacramento, McClellan Airfield Airport, CA21 mi41 minSSE 410.00 miA Few Clouds79°F48°F34%1011.2 hPa
Sacramento International Airport, CA23 mi43 minN 010.00 miFair72°F52°F50%1011 hPa

Link to 5 minute data for KLHM

Wind History from LHM (wind in knots)
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Last 24hrS8E3CalmCalmS4CalmS3W4W6SW4W6W4SW7W3SW8SW7SW5S5E3E5CalmCalmE6Calm
1 day agoSE7S6CalmS9SE6S7S9SW8W3SW5W6SW6W7W6SW7SW6SW4S8S6SE3CalmS5S3Calm
2 days agoS13SE11SE16S13S12SE10
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Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
Click for Map
Fri -- 01:41 AM PDT     Moonrise
Fri -- 02:55 AM PDT     2.99 feet High Tide
Fri -- 06:19 AM PDT     Sunrise
Fri -- 12:48 PM PDT     0.17 feet Low Tide
Fri -- 04:52 PM PDT     Moonset
Fri -- 05:38 PM PDT     2.17 feet High Tide
Fri -- 08:00 PM PDT     Sunset
Fri -- 11:20 PM PDT     0.99 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.52.22.832.92.72.31.91.51.10.70.40.20.20.511.62.12.221.71.31.11

Tide / Current Tables for Clarksburg #4, Sacramento River, California
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Clarksburg #4
Click for Map
Fri -- 01:41 AM PDT     Moonrise
Fri -- 01:46 AM PDT     2.99 feet High Tide
Fri -- 06:20 AM PDT     Sunrise
Fri -- 11:18 AM PDT     0.17 feet Low Tide
Fri -- 04:29 PM PDT     2.17 feet High Tide
Fri -- 04:51 PM PDT     Moonset
Fri -- 08:00 PM PDT     Sunset
Fri -- 09:50 PM PDT     0.99 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.42.932.92.62.21.81.30.90.60.30.20.30.71.21.82.12.11.91.61.2111.2

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 (6,6,7,8)
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Ground Weather Radar Station Sacramento, 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 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.