Sunday, December8, 2019
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Marine Weather and Tides
Dunnigan, 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 7:10AMSunset 4:47PM Saturday December 7, 2019 11:27 PM PST (07:27 UTC) Moonrise 2:28PMMoonset 2:32AM Illumination 86% Phase: Waxing Gibbous; Moon at 11 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- 916 Pm Pst Sat Dec 7 2019
Tonight..SW winds 5 to 15 kt. Gusts up to 25 kt this evening. A slight chance of Thunderstorms this evening. Showers.
Sun..W winds up to 10 kt. Showers likely.
Sun night..N winds 5 to 10 kt.
Mon..W winds 5 to 10 kt. Patchy fog.
Mon night..NW winds up to 10 kt.
Tue..NE winds 5 to 10 kt.
Tue night..NE winds 5 to 10 kt.
Wed..NE winds 5 to 10 kt.
Thu..NE winds 5 to 10 kt. Winds and wind waves higher in and near Thunderstorms.
PZZ500 916 Pm Pst Sat Dec 7 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... South to southwest winds will diminish through this evening. A moderate west swell continues through Sunday. Wind waves will ease tonight as winds diminish.


7 Day Forecast for Marine Location Near Dunnigan, CA
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location: 38.8, -121.96     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 072255 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 255 PM PST Sat Dec 7 2019

SYNOPSIS. A strong winter storm will bring periods of heavy rain, mountain snow, scattered thunderstorms, strong winds, and hazardous travel this weekend. Dry conditions return next week with near average temperatures. More widespread precipitation could return late in the week.

DISCUSSION. Early afternoon satellite imagery shows the primary upper low just off the far northern California coast. The associated surface wave indicated by the distinct curl in the visible/water vapor imagery is moving into the Crescent City area. The attendant cold front currently exiting the Coastal Range eventually moves through the Sacramento Valley during the early/mid-afternoon. While rather mild conditions have prevailed over sections of the Valley given limited cloudiness, showers and scattered thunderstorms will be on the increase during the afternoon and evening hours. Such activity has begun to evolve along and west of I-5 in the northern Sacramento Valley.

The 12Z sounding from KOAK showed quite a bit of low-level shear, particularly between 0-1 km with storm-relative helicities of nearly 200 m2/s2 accompanied by sufficient deep-layer shear (0-6 km of 63 knots). In these situations, some rotation may be observed within some of the healthier storms. As such, the Storm Prediction Center currently has a Marginal Risk out for a couple weak tornadoes across the Sacramento Valley. The threat should wind down by later in the evening given a loss of daytime heating. Otherwise, heavy downpours will be the biggest issue across the Valley and foothills leading to ponding on roads and minor street flooding. If any such stronger radar echoes impact a burn scar, a potential for debris flows would be possible. Conditions should begin to improve beyond Sunday morning as the upper trough departs. Winds will be on the decrease along with a gradual increase in sunshine.

A high-impact winter storm continues to affect the Sierra Nevada chain with a Winter Storm Warning remaining in effect until 1 PM Sunday. Periods of heavy snow will remain likely above 6,500 feet while snow levels are expected to drop down to around 5,500 to 6,000 feet late tonight into Sunday morning. Travel will remain hazardous and is not recommended with the potential for whiteout conditions at times as well as major travel delays. Storm total snowfall will easily reach the 1 to 3 foot range in many locations, locally higher in heavy snow bands and over mountain summits. Conditions to turn more showery in nature during the overnight hours into the first half of Sunday. A gradual improvement in the weather is forecast by late Sunday afternoon.

Mid-level heights will continue to build on Monday and Tuesday as a transient ridge swings through. Mostly sunny skies and near average temperatures are expected to begin the week. A rather weak shortwave enters the picture late Tuesday into Wednesday morning bringing a slight chance for showers up toward Shasta County and the far northern sections of the Coastal Range. Otherwise, expect clouds to be plentiful given the trough passage. ~BRO

EXTENDED DISCUSSION (Wednesday THROUGH Saturday). Ensemble guidance continues to indicate zonal flow across the eastern Pacific later next week with ridging across NorCal. The pattern will bring the potential for light warm-advection precipitation across the northern mountains. Late next week, models are showing a shortwave trough moving into the PacNW. Both the ECMWF ensemble and the GEFS have trended deeper with this system. In addition, the U.S. West Coast AR Landfall Tool is showing a weak TPW plume (AR). Thus, precipitation chances could extend further south including the I-80 corridor and the Sierra. GEFS plumes indicating around 0.30 inches of precipitation for BLU and about 0.35 inches for RDD, so overall amounts could remain on the light side. Temperatures will be slightly above average.

AVIATION.

Widespread MVFR, with local IFR, through 18Z-20Z Sunday as Pacific storm system continues to bring showers to the region. Southerly surface wind gusts to 25-30 kts, strongest over the northern Sacramento Valley, gradually tapering after 00Z Sunday. Isolated thunderstorms possible through 02z Sunday accompanied by small hail and surface wind gusts to 45 kts. Snow levels 6500-7500 ft.

STO WATCHES/WARNINGS/ADVISORIES. Flash Flood Watch until 6 PM PST this evening for Central Sacramento Valley-Clear Lake/Southern Lake County-Mountains Southwestern Shasta County to Northern Lake County-Northeast Foothills/Sacramento Valley-Northern Sacramento Valley-Shasta Lake Area / Northern Shasta County-Western Plumas County/Lassen Park.

Winter Storm Warning until 1 PM PST Sunday for West Slope Northern Sierra Nevada-Western Plumas County/Lassen Park.

Wind Advisory until 4 PM PST this afternoon for Central Sacramento Valley-Mountains Southwestern Shasta County to Northern Lake County-Northeast Foothills/Sacramento Valley- Northern Sacramento Valley.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SFXC1 - San Francisco Bay Reserve, CA 42 mi102 min WSW 9.9 58°F 1013 hPa56°F
PCOC1 - 9415144 - Port Chicago, CA 52 mi57 min SSW 5.1 G 11 58°F 53°F1013.6 hPa
RCMC1 - 9414863 - Richmond, CA 65 mi57 min 54°F

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sacramento International Airport, CA20 mi34 minSSE 116.00 miLight Rain Fog/Mist56°F54°F93%1013.6 hPa
University Airport, CA21 mi32 minSSE 35.00 miOvercast55°F53°F94%1013.9 hPa

Link to 5 minute data for KSMF

Wind History from SMF (wind in knots)
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2 days agoCalmCalmNW3NW4NW4NW4NW3NW3CalmN3CalmE5SE5S4SW6W4NW3NW4N4N3NW4N5N4NE4

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
Click for Map
Sun -- 12:06 AM PST     0.15 feet Low Tide
Sun -- 03:28 AM PST     Moonset
Sun -- 04:30 AM PST     1.98 feet High Tide
Sun -- 07:11 AM PST     Sunrise
Sun -- 11:19 AM PST     0.43 feet Low Tide
Sun -- 02:53 PM PST     Moonrise
Sun -- 04:16 PM PST     2.83 feet High Tide
Sun -- 04:44 PM PST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.40.91.51.921.81.41.10.80.60.40.511.82.52.82.82.52.11.61.20.70.4

Tide / Current Tables for Clarksburg #4, Sacramento River, California
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Clarksburg #4
Click for Map
Sun -- 03:22 AM PST     1.98 feet High Tide
Sun -- 03:28 AM PST     Moonset
Sun -- 07:10 AM PST     Sunrise
Sun -- 09:49 AM PST     0.43 feet Low Tide
Sun -- 02:53 PM PST     Moonrise
Sun -- 03:07 PM PST     2.83 feet High Tide
Sun -- 04:45 PM PST     Sunset
Sun -- 11:23 PM PST     0.04 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.61.11.621.91.71.310.70.50.40.71.322.62.82.72.521.510.60.20.1

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 (2,6,7,8)
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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 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.