Thursday, February22, 2018 L-36.com


Marine Weather and Tides
Rodeo, 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 6:47AMSunset 5:57PM Thursday February 22, 2018 6:14 PM PST (02:14 UTC) Moonrise 10:56AMMoonset 12:00AM Illumination 53% 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 Rodeo, CA
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location: 38.06, -122.28     debug


Area Discussion for - Sacramento, CA
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Fxus66 ksto 222329
afdsto
area forecast discussion
national weather service sacramento ca
329 pm 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
Vort MAX that was along the ca or coast dropping ssewd, mainly
along the WRN side of the cwa. Clouds and scattered showers will
spread sewd over the CWA into this evening. Very low wbzs will
result in low snow levels dropping into the foothills. At press
time, the snow level had dropped to applegate around 2 kft. Spc
sref plumes suggest the SRN portion of the CWA will be more
unstable, roughly from smf swd into the NRN sjv where isolated
storms are possible through late afternoon, than the NRN portion
of the cwa. This is 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. Can't rule out a possible funnel
cloud, but less likely there would be an actual touchdown. Looks
as if the hrrr suggests some isolated cells in the extreme srn
sac, solano co, NRN sjv areas this afternoon. The 12z NAM 3 km
keeps the precip in frozen form and basically out of the valley.

Timing of the snow advisory looks good with precip winding down
around 06z.

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.

Don't expect normal snow water equivalents with these next few
systems in the short term.

After the wx system trof moves through the area tonite, dry nly
winds will increase over the cwa, weakening Fri afternoon. Winds
may continue to mix the NRN and WRN zones overnite, while
decoupling will occur on the E side of the valley. With clearing
skies overnite, it will be another cold nite, with a brisk nly
wind on the W side of the vly lee-side of the coastal range.

A couple more wx systems are forecast to drop out of the goa in
the highly amplified pattern along the W coast of noam in the
short term. The next system on sat, followed by another late sun
into mon. These systems will be similar, cold with relatively low
qpf. The wr us west coast ar landfall tool (probability of ivt) is
virtually "bone dry" for the next 16 days. What moisture there is
will be spilling over the pac ridge and eroding as it hits the
pac NW and spreads inland into our cwa. Even though norcal will
have the continuation of a cold, showery pattern, the QPF will be
relatively low, albeit with high snow ratios. Some modest
modification in temps is expected later in the weekend and into
early next week. Jhm
.Extended discussion (Monday through Thursday)
models show a continuation of the wet pattern as several shortwaves
dive southward from the gulf of alaska. Compared to this week's
systems, the upcoming storms have the potential to pull in some
moisture from the pacific before spreading precipitation inland.

Given the cold nature of these systems, snow levels will remain
low.

Models are showing better agreement compared to previous
forecast runs, though differences remain in terms of timing and
precipitation amounts. The first system moves in Monday into
Tuesday. Early precipitation estimates suggest 0.10-0.30 inches
across the valley, and around 0.25-0.65 inches over the mountains,
though these amounts will likely change as we get closer to the
event. A brief break is expected late Tuesday into Wednesday as
weak upper ridging builds in. Then, a stronger and wetter storm
will move across the area late Wednesday into Friday. Precipitation
will initially impact the northern mountains on Wednesday before
spreading across the forecast area on Thursday. Stay tuned to see
how these systems develop as model uncertainty remains.

Temperatures will remain below average as cold air continues to
filter in.

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
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 1 mi50 min WNW 12 G 18 50°F 1020.3 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 8 mi44 min W 21 G 25 49°F 52°F1020.2 hPa37°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 12 mi44 min WNW 21 G 27 50°F 1020.5 hPa
RCMC1 - 9414863 - Richmond, CA 12 mi44 min WNW 17 G 25 48°F 53°F1020.7 hPa
PCOC1 - 9415144 - Port Chicago, CA 13 mi44 min W 23 G 27 49°F 52°F1019.9 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 15 mi35 min NNW 6 47°F 1021 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 17 mi44 min WNW 17 G 24 49°F 1020.9 hPa
SFXC1 - San Francisco Bay Reserve, CA 17 mi89 min WNW 13 52°F 1019 hPa34°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi44 min W 20 G 24
LNDC1 18 mi50 min WNW 11 G 19 50°F 1020.9 hPa
OBXC1 18 mi50 min 49°F 36°F
PXSC1 19 mi44 min 49°F 35°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 19 mi44 min W 14 G 27 48°F 1020.2 hPa
AAMC1 - 9414750 - Alameda, CA 20 mi44 min WNW 19 G 23 49°F 53°F1021.1 hPa
FTPC1 - 9414290 - San Francisco, CA 20 mi44 min WNW 18 G 28 48°F 53°F1021.6 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 21 mi44 min WNW 12 G 18 50°F 1019.2 hPa
46237 - San Francisco Bar, CA (142) 27 mi44 min 51°F7 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 36 mi84 min NW 23 G 29 48°F 51°F7 ft1021.9 hPa (-1.4)
PRYC1 - 9415020 - Point Reyes, CA 37 mi44 min WNW 27 G 36 51°F1021.9 hPa
RTYC1 - 9414523 - Redwood City, CA 38 mi44 min W 17 G 22 48°F 53°F1022 hPa

Wind History for Martinez-Amorco Pier, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Napa, Napa County Airport, CA10 mi20 minWNW 1410.00 miA Few Clouds47°F32°F56%1019.5 hPa
Concord, Buchanan Field, CA13 mi21 minW 15 G 2110.00 miLight Rain49°F35°F59%1018.9 hPa
Novato / Gnoss Field, CA16 mi39 minW 11 G 2010.00 miA Few Clouds48°F33°F58%1021 hPa
Fairfield / Travis Air Force Base, CA24 mi18 minWNW 1410.00 miFair47°F30°F52%1020 hPa

Wind History from APC (wind in knots)
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Last 24hrW9CalmS4W6SW4W3CalmSW4CalmCalmSW9W9W9N64CalmW18W3W13W14W12
G16
W19NW14NW14
1 day agoW6CalmCalmCalmE4E3N3NE3N4N6N7NE4NE4NE3N43345SW9--S8S5W11
2 days agoSE4CalmCalmNW8W5NW4NW6CalmCalmCalmCalmCalmNW4NW4CalmNE3CalmS5SW6W7S7SW6W7W8

Tide / Current Tables for Selby, California
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Selby
Click for Map
Thu -- 05:21 AM PST     6.28 feet High Tide
Thu -- 06:50 AM PST     Sunrise
Thu -- 10:56 AM PST     Moonrise
Thu -- 12:30 PM PST     0.96 feet Low Tide
Thu -- 05:55 PM PST     Sunset
Thu -- 06:44 PM PST     4.54 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
22.73.74.85.76.26.25.64.73.52.31.5111.52.33.23.94.44.54.33.73.12.6

Tide / Current Tables for Davis Point, California Current
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Davis Point
Click for Map
Thu -- 12:56 AM PST     0.00 knots Slack
Thu -- 03:31 AM PST     1.95 knots Max Flood
Thu -- 06:28 AM PST     -0.00 knots Slack
Thu -- 06:50 AM PST     Sunrise
Thu -- 10:45 AM PST     -1.82 knots Max Ebb
Thu -- 10:56 AM PST     Moonrise
Thu -- 02:27 PM PST     0.00 knots Slack
Thu -- 04:25 PM PST     0.97 knots Max Flood
Thu -- 05:55 PM PST     Sunset
Thu -- 07:43 PM PST     -0.00 knots Slack
Thu -- 11:30 PM PST     -1.07 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.80.11.11.81.91.30.4-0.4-1.1-1.6-1.8-1.8-1.7-1.2-0.40.40.90.90.60.3-0.1-0.5-0.8-1

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 (21,6,7,8)
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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.