Wednesday, December12, 2018 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 7:08AMSunset 4:46PM Wednesday December 12, 2018 9:45 AM PST (17:45 UTC) Moonrise 11:08AMMoonset 9:44PM Illumination 26% Phase: Waxing Crescent; Moon at 5 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
    EDIT      (on/off)   Help
PZZ531 San Francisco Bay South Of The Bay Bridge- 841 Am Pst Wed Dec 12 2018
Today..N winds 5 to 15 kt...becoming nw 5 to 10 kt this afternoon. Patchy fog this morning.
Tonight..E winds up to 10 kt.
Thu..N winds up to 10 kt.
Thu night..E winds 5 to 10 kt.
Fri..S winds 5 to 15 kt. A chance of rain.
Fri night..SE winds 5 to 15 kt. Showers likely.
Sat..SE winds up to 10 kt.
Sun..S winds 5 to 15 kt. Rain.
PZZ500 841 Am Pst Wed Dec 12 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Breezy northerly winds behind a passing cold front will gradually subside later this afternoon and evening over the coastal waters. Winds will then become southerly by late Thursday and Friday ahead of a weekend system. A series of west to northwest swell trains will arrive to the waters over the coming days, creating hazardous conditions for small vessels. The most significant long- period swell is forecast to arrive by late Sunday or Monday, which has the potential to bring open water swells of 20 feet or more.


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


Area Discussion for - Sacramento, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 ksto 121135
afdsto
area forecast discussion
national weather service sacramento ca
335 am pst Wed dec 12 2018

Synopsis
A weak weather system brushes far northern california early today,
otherwise dry weather will continue until the end of the week
when a more active storm pattern returns.

Discussion
Short-wave exiting to the east through northern nevada early this
morning. Showers overnight brought less than a tenth of an inch of
precipitation to the far northern portion of the forecast area
while the remainder of interior norcal is seeing varying amounts
of cloud cover. Current temperatures are considerably milder
across most of the area compared to 24 hours ago and range from
the 30s in the mountains to the 40s elsewhere.

Subsidence and drying northerly flow develops by midday ridging at
the surface and aloft increases resulting in clearing skies. North
winds will also increase becoming locally breezy through portions
of the sacramento valley.

Dry weather pattern continues on Thursday, then pacific frontal
band forecast to move gradually into through norcal Friday and
Friday night, weakening as it does. Appears most of the QPF will
remain to the north of i-80 with around a third to half an inch
over the coast range, around a third of an inch across the
northern sacramento valley and around half an inch over the
northern mountains. Snow levels around 5-6k feet will have some
minor travel impacts over the higher passes.

Some showers linger across the region Saturday before the next
system approaches Saturday night.

.Extended discussion (Sunday through Wednesday)
moderately strong pacific frontal band still on track to move
into norcal on Sunday. Main impact on Sunday will be to the coast
range where the heaviest precipitation is expected initially.

Timing still varies a bit across models but should start seeing
more significant snowfall over the sierra passes Sunday evening
and overnight into Monday. With snow levels below pass levels and
several inches of snowfall projected... Travel impacts over the
sierra are likely Sunday night into Monday.

Brief upper ridging will bring an end to precip over the southern
cwa Monday night but could see some light precipitation riding
over the top of the ridge for some light rain north of about kmyv.

Central valley areas south of kmyv could see some fog return but
cloud cover should keep it to a minimum. Upper ridging keeps
precipitation limited to the northern CWA on Tuesday with ridge
building enough by Wednesday to keep precipitation mainly north of
the forecast area. Daytime temperatures should come in around
normal Sunday through Tuesday under mainly cloud covered skies but
clearing the middle of next week will allow daytime highs to
climb to a few to several degrees above normal.

Aviation
MVFR occasional ifr due to fog south of ksac through about 18z
today and again after 06z Thursday. Otherwise generallyVFR
conditions TAF sites next 24 hours. Northerly winds 5 to 10 mph.

Sto watches warnings advisories None.



Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PCOC1 - 9415144 - Port Chicago, CA 80 mi33 min ENE 5.1 G 7 49°F 53°F1026.5 hPa
SFXC1 - San Francisco Bay Reserve, CA 81 mi60 min NE 9.9 49°F 1026 hPa44°F
RTYC1 - 9414523 - Redwood City, CA 94 mi27 min NW 7 G 12 1025.9 hPa

Wind History for Port Chicago, CA
(wind in knots)    EDIT      (on/off)   Help
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
Last
24hr
W2
W2
NE4
NE5
NE3
W6
W2
SW1
E1
N1
S5
S5
S6
S8
G11
S4
S8
S8
S6
SW2
G7
W6
NE14
G18
NE20
G25
NE11
G14
NE8
1 day
ago
E6
NE4
E2
NE3
NW4
W6
W8
W6
SW4
SW5
G8
S4
G8
S8
S8
S4
G7
SW5
G9
S7
SW4
SW4
G7
SW4
G8
S6
SW3
G6
SW4
SE2
SW4
2 days
ago
NE7
NE8
NE7
NE8
NE7
NE7
NE4
G8
NE5
NE5
E4
SE3
S1
E4
NE5
E4
E4
E5
NE7
NE6
NE4
E2
NE3
E2
SE2

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from O22 (wind in knots)
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
Last 24hr------6--------------------------------------4
1 day agoCalm----------------------------------------------
2 days ago------------------SE5
G11
--------------Calm------------

Tide / Current Tables for Bishop Cut, Disappointment Slough, San Joaquin River, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Bishop Cut
Click for Map
Wed -- 03:37 AM PST     -0.10 feet Low Tide
Wed -- 07:12 AM PST     Sunrise
Wed -- 10:33 AM PST     3.11 feet High Tide
Wed -- 11:11 AM PST     Moonrise
Wed -- 03:33 PM PST     1.35 feet Low Tide
Wed -- 04:46 PM PST     Sunset
Wed -- 08:30 PM PST     3.34 feet High Tide
Wed -- 09:48 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
1.40.70.2-0-0.10.20.81.52.22.73.13.12.72.21.71.41.41.72.32.93.33.332.5

Tide / Current Tables for Brandt Bridge, San Joaquin River, California Current
   EDIT      (on/off)   Help   One Week of Data
Brandt Bridge
Click for Map
Wed -- 02:09 AM PST     -1.18 knots Max Ebb
Wed -- 06:43 AM PST     0.00 knots Slack
Wed -- 07:11 AM PST     Sunrise
Wed -- 09:55 AM PST     0.62 knots Max Flood
Wed -- 11:10 AM PST     Moonrise
Wed -- 12:50 PM PST     -0.00 knots Slack
Wed -- 03:43 PM PST     -0.46 knots Max Ebb
Wed -- 04:46 PM PST     Sunset
Wed -- 06:26 PM PST     0.00 knots Slack
Wed -- 08:40 PM PST     0.48 knots Max Flood
Wed -- 09:48 PM PST     Moonset
Wed -- 10:55 PM PST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
-0.8-1.1-1.2-1.1-1-0.7-0.30.10.40.60.60.50.3-0-0.3-0.4-0.5-0.4-0.10.20.40.50.3-0

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Sacramento, CA (12,3,4,5)
      (on/off)   Help

Ground Weather Radar Station Sacramento, CA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.