Thursday, February22, 2018 L-36.com


Marine Weather and Tides
Stockton, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:43AMSunset 5:53PM Thursday February 22, 2018 2:57 PM PST (22:57 UTC) Moonrise 10:52AMMoonset 12:00AM Illumination 52% Phase: First Quarter Moon; Moon at 8 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 San Francisco Bay North Of The Bay Bridge- 225 Pm Pst Thu Feb 22 2018
.small craft advisory in effect until 10 pm pst this evening...
Tonight..NW winds 15 to 25 kt. Occasional gusts up to 35 kt in the evening.
Fri..N winds 5 to 15 kt.
Fri night..W winds 5 to 15 kt.
Sat..NW winds 10 to 20 kt.
Sat night..NW winds 10 to 20 kt.
Sun..W winds 15 to 25 kt.
Mon..NW winds 10 to 20 kt. Chance of showers, then slight chance of showers.
Tue..NW winds 10 to 20 kt. Slight chance of showers.
PZZ500 225 Pm Pst Thu Feb 22 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Blustery northerly winds across the coastal waters this afternoon and tonight with gale force gusts possible over the outer waters. Strong winds will generate steep wind waves creating hazardous seas. Winds will begin to decrease tomorrow, but remain high enough for small craft advisories. Scattered showers will continue to stream over the waters this afternoon. Another upper-level disturbance will move then into the region early next week.

7 Day Forecast for Marine Location Near Stockton, CA
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location: 37.96, -121.29     debug


Area Discussion for - Sacramento, CA
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Fxus66 ksto 221647
afdsto
area forecast discussion
national weather service sacramento ca
850 am pst Thu feb 22 2018

Synopsis
A cold system will bring low elevation snow to the mountains
into early Friday, which could impact travelers. A few showers are
possible in the valley. Below normal temperatures will continue.

Additional systems likely next week.

Discussion
Update: vort MAX along the coast near the ca or border forecast to
drop ssewd, mainly along the WRN side of the CWA this afternoon.

Clouds and scattered showers will spread sewd over the CWA with very
low wbzs. SPC sref plumes suggest the SRN portion of the CWA will be
more unstable, roughly from smf swd into the NRN sjv, than the nrn
portion of the CWA due to the timing of the vort MAX dropping swd
this afternoon. Effective shear indicates the potential for some mid
level rotation rotating storms. The limiting factor is the elevated
instability forecast in the bufkit forecast soundings and not
surface based convection. Central valley rotating storms are rooted
in the boundary layer with low lcls. Dewpoints in the 30s makes this
more problematic, thus a funnel cloud is possible, but less likely
for an actual touchdown. Looks as if the hrrr suggests some isolated
cells in the NRN sjv this afternoon while the NAM 3 km keeps the
precip in frozen form and basically out of the valley.

Precip amounts will be light with this system due to a dry air mass
with pws ranging from .13 at rev to .34 at mfr and .44 at oak. These
values are below average. Amsu data also indicate very low pw over
the region. However, good dynamics and cold temps will result in
some brief periods of heavy showers with high snow ratios. For
example for blu, using the MAX temp in the profile, a snow ratio of
16:1 to 18:1 is calculated for today. The average slr is 9:1. So
although the snow will look "good", the snow water equivalent won't
look so "good". Jhm

Previous discussion
Still awaiting the first signs of precipitation on the radar as of 1
am. System has slowed but snow expected to begin over the northern
sierra within the next few hours, reaching the i-80 and highway 50
corridors between 3 and 5 am. Snow levels will generally be in the
1500-2000 foot range. Snow will continue through the morning hours,
impacting the am commute and mountain travelers. Another burst of
snow is likely this afternoon and evening during the pm commute,
with lowering snow levels. Still looks like this secondary wave of
snow could bring a dusting down to the lower foothills. Total
accumulations remain generally intact, with 3 to 6 inches above 2000
feet, locally up to 10 inches near the sierra crest. Winter storm
advisory remains in effect through tonight. Travelers should check
caltrans road conditions before they go, carry chains, and prepare
for delays. Visibilities may rapidly change over short distances
especially in bursts of heavier snow.

Meanwhile in the valley, latest hi-res guidance is indicating the
possibility of some pop up showers this afternoon and evening as
trough swings through norcal. Hard to pinpoint where activity
might be as most areas will likely remain dry. Of note, nam
showing CAPE values of 100-200 j kg so also cannot rule out a
thunderstorm or two. These may drop some small hail with colder
air overhead. Breezy winds possible as system moves through.

System pushes east tonight with snow ending between 10pm and
midnight. Brief period of dry weather is expected Friday as
shortwave ridging moves in. Depending on how fast cloud cover
clears out, could be fairly chilly Friday morning with valley
temperatures dropping below freezing again. Next in a series of
shortwaves will drop south in NW flow Saturday. This will bring
another chance for mountain snow, mainly north of highway 50
corridor. Moisture looks fairly starved with this wave so only
expecting light accumulations, but may be enough for some minor
travel impacts. Dry weather again Sunday with additional systems
likely next week. Temperatures will remain below normal.

Ceo
.Extended discussion (Monday through Thursday)
active pattern is expected through the extended period as
successive disturbances embedded in the upper flow drop down from
the north. Guidance is still struggling with the progression of
these systems and precipitation amounts. Regardless, these systems
have the potential to bring precipitation, mountain snow, and
breezy winds. Given the cold nature of these systems, snow levels
will remain low.

Aviation
Vfr conditions expected next 24 hours except local MVFR vicinity
scattered showers and thunderstorms 22z-02z and widespread ifr
over the northern sierra with snow showers thru about 03z Friday.

Sto watches warnings advisories
Winter weather advisory until 10 pm pst this evening for burney
basin eastern shasta county-motherlode-northeast
foothills sacramento valley-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
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 32 mi39 min W 7 G 11 49°F 1021 hPa
PCOC1 - 9415144 - Port Chicago, CA 40 mi39 min W 16 G 19 50°F 52°F1021.1 hPa
SFXC1 - San Francisco Bay Reserve, CA 42 mi72 min WSW 9.9 54°F 1021 hPa37°F
MZXC1 - 9415102 - Martinez-Amorco CA 45 mi39 min WNW 12 G 17 50°F 53°F1021.5 hPa39°F
AAMC1 - 9414750 - Alameda, CA 55 mi39 min W 16 G 20 51°F 53°F1022.4 hPa

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Stockton, Stockton Metropolitan Airport, CA4 mi62 minWNW 1510.00 miA Few Clouds57°F30°F36%1020.8 hPa

Wind History from SCK (wind in knots)
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Last 24hrNW7W8NW5W5W4W5W3CalmCalmCalmS3S4SE4S5SE4S7S6E3S4W6W9NW11
G14
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1 day agoCalm6NW7NW7NW6N3SW7CalmW3CalmCalmNW3E3NE3CalmCalmCalmCalmW5W7N7W4NW8NW9
2 days agoNW14
G24
NW13NW12NW10NW8N5N7NW7CalmNW4CalmNW5NW7W6W6NW5NW6CalmW45353NW5

Tide / Current Tables for Stockton, San Joaquin River, California
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Stockton
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Thu -- 04:27 AM PST     0.76 feet Low Tide
Thu -- 06:46 AM PST     Sunrise
Thu -- 10:06 AM PST     4.01 feet High Tide
Thu -- 10:52 AM PST     Moonrise
Thu -- 05:51 PM PST     Sunset
Thu -- 06:10 PM PST     0.57 feet Low Tide
Thu -- 11:57 PM PST     2.81 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.72.21.61.10.80.81.222.93.743.93.52.92.21.510.70.60.71.11.72.32.7

Tide / Current Tables for Vulcan Island .5 mi E, San Joaquin River, California Current
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Vulcan Island .5 mi E
Click for Map
Thu -- 02:05 AM PST     -0.36 knots Max Ebb
Thu -- 05:12 AM PST     0.00 knots Slack
Thu -- 06:46 AM PST     Sunrise
Thu -- 08:04 AM PST     0.76 knots Max Flood
Thu -- 10:52 AM PST     Moonrise
Thu -- 11:30 AM PST     -0.00 knots Slack
Thu -- 02:31 PM PST     -0.51 knots Max Ebb
Thu -- 05:51 PM PST     Sunset
Thu -- 06:54 PM PST     0.00 knots Slack
Thu -- 09:23 PM PST     0.40 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.1-0.3-0.4-0.3-0.2-00.30.60.80.70.50.2-0.1-0.4-0.5-0.5-0.4-0.3-0.200.30.40.40.3

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for Sacramento, CA (17,4,5,8)
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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.