Thursday, March21, 2019 L-36.com


Marine Weather and Tides
Copperopolis, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:03AMSunset 7:17PM Thursday March 21, 2019 5:29 AM PDT (12:29 UTC) Moonrise 7:18PMMoonset 6:48AM Illumination 100% Phase: Full Moon; Moon at 15 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- 219 Am Pdt Thu Mar 21 2019
Today..NW winds around 5 kt...becoming sw 5 to 15 kt this afternoon.
Tonight..SW winds 5 to 10 kt.
Fri..SE winds 10 to 20 kt with gusts up to 30 kt. Rain.
Fri night..W winds 5 to 10 kt. A chance of rain.
Sat..W winds 5 to 15 kt.
Sat night..NW winds 5 to 10 kt.
Sun..SE winds 5 to 15 kt. A chance of rain.
Mon..S winds 5 to 10 kt. Rain likely.
PZZ500 219 Am Pdt Thu Mar 21 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Rain shower chances will continue through the early morning hours, mainly from pigeon point and locations south. Weak high pressure will build off the southern california coast through the day bringing light west to northwest winds. Winds will turn southerly and increase on Friday as a frontal system moves in. A moderate- period west swell will continue through Thursday before a longer period west to northwest swell arrives on Friday.


7 Day Forecast for Marine Location Near Copperopolis, CA
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location: 37.94, -120.54     debug


Area Discussion for - Sacramento, CA
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Fxus66 ksto 211034
afdsto
area forecast discussion
national weather service sacramento ca
334 am pdt Thu mar 21 2019

Synopsis
Scattered mountain showers today with light snow higher
elevations. Another round of rain and snow Friday afternoon
through Saturday with enough mountain snow for travel impacts.

Dry Sunday then more rain and mountain snow early next week.

Discussion
Negative tilt upper trough over the state this morning brought a
few light showers to the northern sacramento valley earlier this
evening as well as some light shower activity over the northern
sierra. Most showers have ended but a slight threat of mountain
showers will continue today as the upper low shifts eastward into
the the great basin. Daytime highs will reach near normal today in
the central valley under mainly sunny skies while the mountains
remain mostly cloudy. Most areas will see dry conditions tonight
under brief upper level ridging before the next pacific frontal
system pushes onshore Friday morning. By mid day Friday, areas
west of the sacramento valley should be seeing light precipitation
if current model projections hold. By Friday afternoon, the
frontal band shifts inland over norcal with precipitation
expected over the sierra cascade range. Travel impacts are likely
over the sierra during the Friday to Saturday afternoon timeframe
as the moderately cold for the season storm system will likely
bring several increases of snowfall below pass levels. Have
therefore issued a winter weather advisory to deal with likely
travel difficulties. Light precipitation at the lower elevations
will likely only bring minimal issues. The main upper trough is
forecast to move through Saturday afternoon and night for
continued shower activity over the sierra cascade range. Snow
levels at this time are forecast to drop to 4000 feet before
precipitation drops off Saturday night.

Upper ridging will make Sunday a fairly dry day with mainly fair
skies warming daytime highs to near or a little above normal. This
dry period should make Sunday a fairly good travel day. This break
will be fairly brief, however, with the next pacific system
pushing inland by Sunday night.

.Extended discussion (Monday through Thursday)
an unsettled and cool pattern is expected next week, with periods
of rain, mountain snow and breezy winds.

Confidence is good that wet weather will spread across the area
Monday, with general agreement across GEFS ensemble membersand the
potential for a weak atmospheric river continues. Models are
pretty consistent in directing the best moisture over northern
california, but there is some variance in exactly where.

Additional waves with decent moisture plumes are expected to
continue through the week, bringing periods of moderate to heavy
rain, but exact timing remains uncertain. Early estimates of
precipitation are around 1 to 4 inches for Monday through
Wednesday. Snow levels continue to range between around 5000 to
6000 feet, with the potential for travel delays. Ek

Aviation
Vfr conditions are expected over the next 24 hours. Winds are
expected to generally under 10 knots. Ek

Sto watches warnings advisories
Winter weather advisory from 11 am Friday to 5 pm pdt Saturday
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
PCOC1 - 9415144 - Port Chicago, CA 80 mi41 min S 5.1 G 7 56°F1018.6 hPa
SFXC1 - San Francisco Bay Reserve, CA 81 mi104 min NW 1 43°F 1018 hPa41°F
RTYC1 - 9414523 - Redwood City, CA 94 mi41 min S 1 G 1.9 61°F1019 hPa

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
COLUMBIA, CA9 mi34 minN 010.00 miOvercast45°F44°F100%1017.6 hPa

Wind History from O22 (wind in knots)
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Tide / Current Tables for Holt, Whiskey Slough, San Joaquin River, California
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Holt
Click for Map
Thu -- 01:46 AM PDT     -0.09 feet Low Tide
Thu -- 07:07 AM PDT     Sunrise
Thu -- 07:29 AM PDT     3.94 feet High Tide
Thu -- 07:51 AM PDT     Moonset
Thu -- 02:02 PM PDT     0.30 feet Low Tide
Thu -- 07:18 PM PDT     Sunset
Thu -- 07:31 PM PDT     4.09 feet High Tide
Thu -- 08:21 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50-0.10.41.32.43.43.93.93.42.71.81.10.50.30.61.42.53.5443.62.81.9

Tide / Current Tables for Brandt Bridge, San Joaquin River, California Current
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Brandt Bridge
Click for Map
Thu -- 12:22 AM PDT     -1.21 knots Max Ebb
Thu -- 04:06 AM PDT     0.00 knots Slack
Thu -- 06:44 AM PDT     0.70 knots Max Flood
Thu -- 07:07 AM PDT     Sunrise
Thu -- 07:50 AM PDT     Moonset
Thu -- 09:30 AM PDT     -0.01 knots Slack
Thu -- 01:10 PM PDT     -0.94 knots Max Ebb
Thu -- 04:19 PM PDT     0.01 knots Slack
Thu -- 06:53 PM PDT     0.74 knots Max Flood
Thu -- 07:18 PM PDT     Sunset
Thu -- 08:21 PM PDT     Moonrise
Thu -- 09:27 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.2-1.2-1-0.6-0.10.40.70.70.50.2-0.2-0.6-0.8-0.9-0.9-0.6-0.20.30.70.70.60.2-0.3-0.7

Weather Map and Satellite Images
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wmap_P
GOES 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.
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Wind Forecast for Sacramento, CA (8,2,3,4)
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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 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.