Friday, April3, 2020
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Marine Weather and Tides
Fiddle, 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 6:42AMSunset 7:31PM Friday April 3, 2020 4:03 PM PDT (23:03 UTC) Moonrise 1:25PMMoonset 3:16AM Illumination 83% 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- 218 Pm Pdt Fri Apr 3 2020
.small craft advisory in effect until 9 pm pdt this evening...
Tonight..W winds 10 to 20 kt with gusts up to 25 kt, diminishing to 5 to 15 kt after midnight.
Sat..SW winds 5 to 15 kt with gusts up to 25 kt. Rain.
Sat night..SW winds 5 to 10 kt. Rain likely.
Sun..S winds 10 to 20 kt with gusts up to 25 kt. Rain.
Sun night..SW winds up to 10 kt. Rain likely.
Mon..S winds 5 to 15 kt. Rain likely.
Mon night..NW winds around 5 kt.
Tue..W winds up to 10 kt. A chance of rain.
Wed..SW winds 5 to 15 kt.
PZZ500 218 Pm Pdt Fri Apr 3 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Strong northwest winds will generate fresh and steep wind waves creating hazardous conditions for smaller vessels. Winds will then subside by early Saturday morning. A cold upper level low from the gulf of alaska will bring wet weather to the coastal waters and bays this weekend and next week. A moderate northwesterly swell will prevail through much of the forecast period.


7 Day Forecast for Marine Location Near Fiddle, CA
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location: 38.52, -120.78     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 032222 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 322 PM PDT Fri Apr 3 2020

Synopsis. Dry and mild weather today underneath sunny skies. A pair of storms move in over the weekend and continue into early next week bringing rain, gusty winds, chances for thunderstorms, heavy mountain snow, and travel issues. Below average temperatures likely through Tuesday with a gradual warm up thereafter.

Discussion. Abundant sunshine with mild temperatures have overspread the region in advance of an active pattern over the Pacific. Current mid-afternoon temperatures are running in the 60s across the Valley and Delta with 50s into the foothills. Relative humidities have come up compared to yesterday given the relaxation in the northerly wind fields. Eventually the focus shifts toward an active multi-day period looming ahead.

The first in a duo of a Pacific systems is currently spinning around 135W longitude. This compact upper low will quickly shift eastward reaching the northern California coast by early Saturday morning. The trough does open up a bit while lifting up toward south-central Oregon. This should limit the impacts from this disturbance although the advancing cold front could bring a quick burst of showers, particularly over the mountains. Across the Sierra, 4 to 8 inches of snow will be possible, although cannot rule out isolated higher amounts toward mountain summits. By the afternoon and evening hours, scattered showers will linger with some brief improvement in conditions over the Valley.

On the heels of the initial shortwave will be a much stronger, colder system set to arrive on Sunday. 500-mb temperatures are expected to run between -29 and -32C which is fairly anomalous for early April. The Ensemble Situational Awareness Table is advertising height anomalies to range from about 3 to 4 standard deviations below average which is quite impressive. While the colder plume of air aloft stays just offshore, the impacts will be many across interior Northern California. The mountains can expect a brunt of the more high-impact level issues which includes potential road closures, chain controls, snow-covered roads, and whiteout conditions at times. 2 to 3 inch hourly snow rates are a distinct possibility with Sunday snow totals alone possibly reaching 2 feet. A Winter Storm Warning has been issued and will be in effect from Saturday morning through Monday morning across the Coastal Range, Shasta County mountains, and Sierra-Cascade range for elevations 4,500 feet and above. Storm snow totals could easily reach 2 to 3 feet, locally up to 4 feet. For those who must travel, Sunday will be a treacherous day on the roads so plan accordingly.

Across the Valley and foothills, Sunday could prove to be a very active day. Simulated radar imagery shows some periods of locally heavy rainfall tracking through the region, especially over the foothill locations. Some ponding on roads can be expected although not anticipating any hydrologic issues given how dry the region has been this winter. Total Valley rainfall are expected to run between 1 to 2 inches, running on the higher side of the range over the northern Sacramento Valley. 2 to 4 inches will be more commonplace into the foothills given the flow getting augmented by the terrain. On the thunderstorm realm, fairly impressive vertical shear profiles set up over the west side of the Valley. Model soundings and hodographs support the threat for a few more organized storms capable of small hail, gusty winds, and perhaps a weak tornado or two. The wild card is the available instability which will be dependent on the amount of clearing which can take place. Aside from the threat for precipitation, breezy southerly winds will dominate the weekend, particularly on Sunday with gusts likely in the 30 to 40 mph range.

On Monday, the upper low will fill some but remains a slow mover as it drifts toward the south. This will keep showers in the forecast with a particular focus over the mountains where a Winter Storm Warning will remain in effect into the morning hours. Snow levels do drop to around 3,000 to 4,000 feet on Monday. Throughout the remainder of the day, instability-driven showers are likely to fire with the activity waning into the evening hours. Given the close proximity of the parent low to the coast, additional thunderstorm chances exist but should be weaker given more limited vertical shear. ~BRO

EXTENDED DISCUSSION (Tuesday THROUGH Friday). Unsettled weather is going to continue into the extended forecast. Upper level low will be closed off just off the central coast of CA. This will keep showers in the forecast for both the valley and mountains on Tuesday and they will be more widespread roughly I-80 south. The upper level low will push into SoCal on Wednesday keeping showers going mainly south of I-80 and should be less widespread than Tuesday. The low will continue to make its slow journey to the east on Thursday and the EC ensemble is a bit quicker with that journey than the GEFS. Have left showers in the forecast for Thursday but should mainly be limited to higher elevations. Upper level ridging starts to build in late in the week. Snow levels will be 5000 to 6000 feet Tuesday and will rise above 6500 feet Wednesday. Cooler than average temperatures will continue throughout the period.

-CJM

AVIATION. VFR conditions through 11z for the TAF sites. MVFR after 12z for the northern terminals and after 16z for southern terminals due to light showers with low cigs and reduced vis at times. Wind remains under 10 knots through 15z before becoming breezy Saturday.

STO WATCHES/WARNINGS/ADVISORIES. Winter Storm Warning from 11 AM Saturday to 11 AM PDT Monday for Burney Basin / Eastern Shasta County-Mountains Southwestern Shasta County to Western Colusa County-Shasta Lake Area / Northern Shasta County-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 70 mi78 min WSW 6
PCOC1 - 9415144 - Port Chicago, CA 74 mi45 min W 12 G 15 61°F 59°F1015.6 hPa
RCMC1 - 9414863 - Richmond, CA 96 mi45 min SSE 5.1 G 8 59°F 58°F1016.1 hPa

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sacramento Mather Airport, CA28 mi78 minN 410.00 miClear64°F37°F37%1015.6 hPa

Link to 5 minute data for KMHR

Wind History from MHR (wind in knots)
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Last 24hr------CalmSW6SW7S4------SE7SE7SE6E5SE5SE4SE3SE4CalmSW3--CalmN4S3
1 day agoNW6N8NW7NW4N3CalmCalm--------NW5N8--W5--NW12N13N12
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2 days ago--SW8SW11SW9SW6S5SE5SE7----SE6SE4SE7SE6SE6CalmNE6NE6--NW10NW12NW9N9N7
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Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
Click for Map
Fri -- 04:18 AM PDT     Moonset
Fri -- 04:56 AM PDT     2.31 feet High Tide
Fri -- 06:46 AM PDT     Sunrise
Fri -- 11:22 AM PDT     0.82 feet Low Tide
Fri -- 02:27 PM PDT     Moonrise
Fri -- 03:24 PM PDT     2.71 feet High Tide
Fri -- 07:32 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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00.30.91.62.12.32.21.91.51.210.80.91.52.22.72.72.52.21.81.30.80.50.2

Tide / Current Tables for Clarksburg #4, Sacramento River, California
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Clarksburg #4
Click for Map
Fri -- 03:47 AM PDT     2.31 feet High Tide
Fri -- 04:18 AM PDT     Moonset
Fri -- 06:47 AM PDT     Sunrise
Fri -- 09:52 AM PDT     0.82 feet Low Tide
Fri -- 02:15 PM PDT     2.71 feet High Tide
Fri -- 02:28 PM PDT     Moonrise
Fri -- 07:32 PM PDT     Sunset
Fri -- 11:07 PM PDT     -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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0.61.21.72.22.32.11.81.41.10.90.81.11.72.42.72.72.52.11.61.10.70.30.1-0

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 (19,4,5,8)
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Ground Weather Radar Station Sacramento, CA
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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.