Thursday, May23, 2019 L-36.com


Marine Weather and Tides
Castro Valley, 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 5:51AMSunset 8:19PM Thursday May 23, 2019 3:45 PM PDT (22:45 UTC) Moonrise 11:48PMMoonset 9:01AM Illumination 76% Phase: Waning Gibbous; Moon at 20 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- 251 Pm Pdt Thu May 23 2019
.small craft advisory in effect from 9 pm pdt this evening through late tonight...
Tonight..SW winds 15 to 25 kt...increasing to 10 to 20 kt with gusts up to 25 kt after midnight.
Fri..SW winds 10 to 20 kt with gusts up to 25 kt.
Fri night..SW winds 5 to 15 kt with gusts up to 25 kt.
Sat..SW winds 5 to 15 kt.
Sat night..W winds 15 to 25 kt with gusts up to 30 kt.
Sun..W winds 5 to 15 kt.
Sun night..W winds 5 to 10 kt.
Memorial day..SW winds 5 to 15 kt.
Tue..W winds 5 to 15 kt.
PZZ500 251 Pm Pdt Thu May 23 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gusty winds gradually decrease late tonight and early Friday. Gusty northwest winds will redevelop over the coastal waters Friday night through the weekend. A large northwest swell will subside, but remain moderate through the end of the week and into the weekend.


7 Day Forecast for Marine Location Near Castro Valley, CA
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location: 37.71, -122.07     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 232119
afdmtr
area forecast discussion
national weather service san francisco bay area
219 pm pdt Thu may 23 2019

Synopsis Temperatures will remain near to slightly below seasonal
averages through late week with mainly dry weather conditions. Can't
rule out the chance of scattered showers and possibly a few
rumbles of thunder in the higher elevations this afternoon.

Unseasonably cool and unsettled conditions return late in the
weekend with chances for rain showers as a weather system drops
down the west coast.

Discussion As of 2:19 pm pdt Thursday... A mix of clouds and
sun throughout the san francisco bay area this afternoon. Cumulus
clouds are beginning to build in parts of the north bay, east bay,
the gabilan range, and diablo range, as well as to our east in
the sacramento and san joaquin valleys. Meanwhile along the
monterey and santa cruz county coastline, overcast conditions from
the morning continue to linger this afternoon. It is quite
possible the stratus may not clear for some communities around
monterey all day. Temperatures will MAX out in the 60s along the
coast and 70s for inland locations, equating to about 2-7 degrees
below middle to late may climatological normal values.

As the afternoon progresses, parts of interior monterey, san
benito, and santa clara counties may see some isolated to
scattered rain showers develop as we remain on the back side of a
departing upper level low presently located in the four corners
region. While the best chance for convection and thunderstorms
will remain to our east in the sierra nevada, can't rule out a
very slight chance of thunder closer to home. The storm prediction
center does have far interior san benito and monterey counties in
a general mention of thunder, and additionally, the 18z hrrr
suggests some minor instability (100-200 j kg mu cape) around peak
heating for these locations. With this in mind, have opted to add
a slight chance of thunder this afternoon for interior monterey
county as well as central and southern san benito county. Kmux
and khnx radars are showing signs of convection trying to get
started between santa rita peak and coalinga, though no lightning
has been detected at this time. Will continue to watch radar
trends as the day GOES on.

Similar conditions can be expected on Friday, though shower
chances in the mountains will likely be lower than today. Low
clouds should again be present along the coast and some valleys
for the morning with afternoon temperatures holding in the 60s for
the coast and 70s inland.

By the second half of the weekend, another upper level low will
drop south from the pacific northwest, bringing with it another
chance of rain showers. Similar to the past system, the best
probabilities for showers (and possible thunderstorms) will be to
our east and north, but the chance cannot be ruled out for us at
this time. This upper low will also bring a reinforced shot of
cooler air with some interior communities struggling to reach the
70s for both Sunday and possibly even memorial day. Temperatures
will begin to moderate by Tuesday and Wednesday with 80 degree
readings finally starting to return to the southern salinas valley
as well as parts of the santa clara valley, east bay valleys, and
north bay. There remains some uncertainty from Wednesday and
beyond as the GFS has more zonal flow aloft while the ecmwf
develops a weak upper level low off the california coast.

Aviation As of 10:27 am pdt Thursday... Morning low clouds were
slow to clear given high clouds overhead. Most terminals areVFR
now with the exception of monterey bay. Mry sns will gradually
clear late this morning.VFR this afternoon with high clouds.

Clouds return this evening. Some models suggest a semi-southerly
surge up the coast. Clouds inside sf bay will be low confidence
forecast tonight.

Vicinity of ksfo...VFR as clouds clear. Breezy to gusty winds
possible this afternoon. Will bring a bkn deck back late tonight,
but confidence is marginal.

Sfo bridge approach... Similar to ksfo. Possibly less clouds late
tonight compare to ksfo and koak.

Monterey bay terminals... Ifr this morning with patchy drizzle
observed at the terminals. Expect ifr conditions to improve to
MVFR by late morning, and thenVFR early this afternoon. MVFR cigs
returning early this evening.

Marine As of 10:23 am pdt Thursday... Moderate to locally strong
winds will persist over the coastal waters today and early tonight
resulting in hazardous conditions. Winds will gradually decrease
late tonight and early Friday. Gusty northwest winds will
redevelop over the coastal waters Friday night through the
weekend. A large northwest swell will persist through the end of
the week and into the weekend particularly over the northern and
outer waters.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pt reyes 0-10 nm until 3 am
sca... Pt reyes to pigeon pt 0-10 nm until 3 am
sca... Pigeon pt to pt pinos 0-10 nm until 3 am
sca... Pt pinos to pt piedras blancas 0-10 nm until 3 am
sca... Pt arena to pigeon pt 10-60 nm until 3 am
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Rough bar advisory for sf bar until 3 am
sca... Sf bay from 9 pm until 3 am
public forecast: rowe
aviation: mm
marine: mm
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AAMC1 - 9414750 - Alameda, CA 13 mi33 min W 11 G 14 61°F 64°F1010.9 hPa
LNDC1 13 mi27 min WSW 8.9 G 14 62°F 1010.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 15 mi33 min WSW 14 G 17
OBXC1 16 mi27 min 60°F 54°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 16 mi27 min W 9.9 G 13 62°F 1010.4 hPa
RTYC1 - 9414523 - Redwood City, CA 16 mi27 min ESE 7 G 8.9 72°F 65°F1010.2 hPa
PXSC1 18 mi27 min 61°F 53°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 18 mi27 min W 8.9 G 16 62°F 1009.4 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi27 min SW 20 G 24 57°F 1010.4 hPa
FTPC1 - 9414290 - San Francisco, CA 22 mi33 min WSW 12 G 24 57°F 60°F1011 hPa
UPBC1 23 mi27 min W 12 G 14
MZXC1 - 9415102 - Martinez-Amorco CA 23 mi33 min W 11 G 12 70°F 63°F1009 hPa52°F
RCMC1 - 9414863 - Richmond, CA 23 mi33 min SSW 11 G 18 59°F 62°F1010.2 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 24 mi136 min S 9.9 62°F 1010 hPa
PCOC1 - 9415144 - Port Chicago, CA 24 mi33 min W 7 G 9.9 72°F 63°F1008.9 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 25 mi33 min WNW 5.1 G 7 74°F 1008.6 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 26 mi27 min SW 15 G 17 64°F 1009.1 hPa
46237 - San Francisco Bar, CA (142) 30 mi45 min 61°F8 ft
SFXC1 - San Francisco Bay Reserve, CA 34 mi60 min WNW 5.1 76°F 1009 hPa51°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 41 mi25 min WNW 7.8 G 12 55°F 55°F1011.7 hPa

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hayward, Hayward Air Terminal, CA4 mi51 minW 810.00 miPartly Cloudy68°F54°F61%1010.9 hPa
Oakland, Metro Oakland International Airport, CA8 mi52 minVar 610.00 miA Few Clouds68°F54°F61%1010.3 hPa
Livermore, Livermore Municipal Airport, CA13 mi52 minW 810.00 miOvercast71°F51°F49%1008.8 hPa
San Carlos Airport, CA16 mi56 minW 1010.00 miPartly Cloudy72°F53°F53%1010.2 hPa
Palo Alto Airport, CA16 mi58 minN 910.00 miPartly Cloudy70°F57°F64%1009.8 hPa
San Francisco, San Francisco International Airport, CA17 mi49 minSSW 710.00 miA Few Clouds70°F52°F53%1009.8 hPa
Concord, Buchanan Field, CA19 mi52 minSSW 1010.00 miPartly Cloudy80°F50°F35%1007.4 hPa
Mountain View, Moffett Field, CA19 mi49 minN 1010.00 miPartly Cloudy74°F57°F56%1010.1 hPa

Wind History from HWD (wind in knots)
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Last 24hrW15W12W8W11W6W6W6SW5W9W8CalmCalmCalmW5CalmCalmS6S7SW8S7SW5W8W9W8
1 day agoW17
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NW11W13W16NW11NW8NW10NW7NW4N3NW6NW8N6W14W14W14W14W17
2 days agoW14W14W13W11W8W7S6SW9SW9S8S6W8W11W11W9NW7W6NW6W14
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Tide / Current Tables for Roberts Landing, 1.3 miles west of, San Francisco Bay, California
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Roberts Landing
Click for Map
Thu -- 12:04 AM PDT     Moonrise
Thu -- 03:26 AM PDT     6.65 feet High Tide
Thu -- 05:53 AM PDT     Sunrise
Thu -- 10:02 AM PDT     Moonset
Thu -- 11:00 AM PDT     -0.43 feet Low Tide
Thu -- 06:10 PM PDT     5.85 feet High Tide
Thu -- 08:18 PM PDT     Sunset
Thu -- 11:28 PM PDT     3.20 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.94.95.96.66.6653.520.7-0.1-0.4-0.10.82.13.44.65.55.85.75.14.33.63.3

Tide / Current Tables for Oakland Airport SW, South San Francisco Bay, California Current
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Oakland Airport SW
Click for Map
Thu -- 12:04 AM PDT     Moonrise
Thu -- 12:40 AM PDT     0.37 knots Max Flood
Thu -- 03:22 AM PDT     -0.00 knots Slack
Thu -- 05:53 AM PDT     Sunrise
Thu -- 06:42 AM PDT     -0.81 knots Max Ebb
Thu -- 10:02 AM PDT     Moonset
Thu -- 10:37 AM PDT     0.01 knots Slack
Thu -- 01:59 PM PDT     0.60 knots Max Flood
Thu -- 05:36 PM PDT     -0.01 knots Slack
Thu -- 07:27 PM PDT     -0.32 knots Max Ebb
Thu -- 08:18 PM PDT     Sunset
Thu -- 10:48 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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0.30.40.30.1-0.2-0.5-0.8-0.8-0.7-0.4-0.20.10.40.50.60.60.40.2-0.1-0.3-0.3-0.2-0.10

Weather Map and Satellite Images
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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 San Francisco/Monterey Bay Area, CA (18,4,5,8)
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Ground Weather Radar Station San Francisco Bay Area, 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.