Thursday, May24, 2018 L-36.com


Marine Weather and Tides
San Leandro, CA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:50AMSunset 8:20PM Thursday May 24, 2018 6:33 PM PDT (01:33 UTC) Moonrise 2:36PMMoonset 2:23AM Illumination 77% Phase: Waxing Gibbous; Moon at 10 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- 224 Pm Pdt Thu May 24 2018
Tonight..SW winds 5 to 15 kt. Slight chance of showers after midnight.
Fri..SE winds 10 kt...becoming north in the afternoon. Chance of showers.
Fri night..W winds 10 kt. Slight chance of showers in the evening.
Sat..W winds 10 to 20 kt.
Sat night..W winds 10 to 20 kt.
Sun..SW winds 10 kt.
Memorial day..SW winds 10 kt.
Tue..SW winds 10 kt.
PZZ500 224 Pm Pdt Thu May 24 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure near the coast will keep light to moderate winds over the coastal waters. Gusty winds will be possible this evening north of the bay bridge inside the san francisco bay. Northwest winds increase Friday. Gusty winds will impact the coastal waters this holiday weekend. Mixed seas with a longer period southwest swell and a smaller northwest swell.

7 Day Forecast for Marine Location Near San Leandro, CA
   Hourly   EDIT   Help
location: 37.68, -122.17     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 250103
afdmtr
area forecast discussion
national weather service san francisco bay area
603 pm pdt Thu may 24 2018

Synopsis Cloudy and cool today with increasing chance of
showers tonight into Friday as a late season low passes over the
region. Shower chances end by early Saturday morning. High
pressure builds Sunday through Tuesday with a noted warming and
drying trend.

Discussion As of 1:38 pm pdt Thursday... Overcast conditions
continue to dominate much of the central california coast and san
francisco bay area this early afternoon. The marine stratus
earlier today managed to push well inland to the santa clara-
merced county line at pacheco pass, and south through monterey
county up to the monterey-fresno and monterey-kings county lines.

The healthy marine layer is responding to an approaching upper
level low that will be the main weather story for our region over
the next day or two as it approaches the california coast.

Temperatures this afternoon will remain rather cool for much of
the area blanketed under the clouds. Highs will be in 50s to 60s
along the coast, and 60s to low 70s for interior locations.

Overnight tonight, the aforementioned upper level low will be
within a few hundred miles of the central california coast. As the
low moves eastward, precipitation chances will increase later
tonight and into the day on Friday. Not expecting a widespread
washout by any means, but more or less scattered shower activity.

In terms of convective thunder potential, models are suggesting
some minimal surface-based and mid-level instability with a
notable downward trend from model run-to-run. The latest day 2
storm prediction center convective outlook has actually backed off
on the general thunder area over parts of the state, which
previously had included parts of the north bay. It's still a non-
zero chance, but not looking as likely as earlier. Nonetheless,
the main impacts expected will be wet roadways from the scattered
showers that may impact the Friday commutes. With the scattered
nature of the showers, total rain amounts are expected to remain
light overall with amounts reaching a tenth of an inch or locally
a quarter of an inch for the higher elevations.

Rain chances will begin to diminish overnight Friday and into
Saturday, though can't rule out lingering showers -- particularly
in the north bay -- through midday Saturday. Temperatures will
begin rebounding back toward seasonal normals with noticeable
warming for the interior from Saturday to Sunday. Highs will
likely reach the mid 70s to 80s for the interior by Sunday with
additional warming for Monday as a ridge builds over the eastern
pacific. Can't rule out the potential for some 90s by memorial day
for the interior. Overall it should be a very nice holiday
weekend weather-wise by Sunday and Monday with some clearing even
reaching the beaches. Any beachgoers should always be mindful of
the hazards the pacific ocean presents year-round, including the
cold water temperatures and rip current risks. Always be aware of
your surroundings, and never turn your back to the ocean.

As the ridge shifts inland by Tuesday and Wednesday next week,
temperatures will likely begin a gradual cooling trend. By this
time next week models advertise a trough developing over the west
coast, which would help to reinforce a downward trend in afternoon
highs.

Aviation As of 6:00 pm pdt Thursday... Low clouds did not clear
in most areas today and will likely persist through the night now
that solar heating is diminishing. Expect widespread ceilings
near 3k feet overnight. Scattered showers associated with
approaching upper low will likely develop overnight and persist
through much of Friday. As the low moves inland on Friday, cooling
aloft should help produce sufficient mixing to clear lower
clouds. So, expect mostlyVFR conditions by late Friday morning.

Winds will be generally light except locally moderate west to
southwest winds early this evening. Forecast confidence moderate.

Vicinity of ksfo... Bkn-ovc ceilings between 2500-3000 feet
expected overnight with vcsh developing by 03z and continuing
through much of Friday. Ceilings likely to lift above 3000 feet
on Friday morning.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR CIGS expected into Friday morning
along with vcsh after 06z.VFR conditions forecast to develop by
midday Friday.

Marine As of 10:33 am pdt Thursday... Light to locally moderate
winds over the coastal waters today as high pressure remains off
the immediate coast. The strongest winds today will be located in
the northern san francisco bay. Northwest winds pick up by mid
day tomorrow and become locally moderate by tomorrow night
through the upcoming weekend. Mixed seas with a longer period
southwest swell and a smaller northwest swell. Increasing winds
later this weekend will bring locally steep fresh swell.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 10 pm
public forecast: rowe
aviation: dykema
marine: mm
visit us at

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
AAMC1 - 9414750 - Alameda, CA 9 mi52 min W 8 G 12 57°F 63°F1018 hPa
LNDC1 10 mi46 min W 8 G 13 57°F 1017.8 hPa
RTYC1 - 9414523 - Redwood City, CA 12 mi46 min 64°F
OBXC1 12 mi46 min 57°F 50°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 12 mi52 min WSW 14 G 18
OKXC1 - 9414776 - Oakland (Berth 34), CA 13 mi46 min W 8 G 12 58°F 1017.8 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 14 mi52 min WSW 7 G 13 57°F 1016.8 hPa
PXSC1 15 mi52 min 59°F 50°F
FTPC1 - 9414290 - San Francisco, CA 18 mi52 min SW 6 G 13 56°F 58°F1018.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 19 mi46 min SW 11 G 14 58°F 1017.8 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 21 mi53 min NNW 7 56°F 1018 hPa
RCMC1 - 9414863 - Richmond, CA 21 mi52 min SW 8 G 12 57°F 60°F1017.4 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 25 mi46 min 64°F
46237 - San Francisco Bar, CA (142) 26 mi64 min 55°F5 ft
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 26 mi46 min WSW 15 G 19 58°F 1016.6 hPa
PCOC1 - 9415144 - Port Chicago, CA 27 mi52 min WSW 16 G 22 59°F 64°F1016.3 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 29 mi58 min WNW 11 G 21 61°F 1015.7 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 36 mi44 min SW 5.8 G 7.8 55°F 54°F5 ft1018.6 hPa55°F
SFXC1 - San Francisco Bay Reserve, CA 37 mi109 min W 16 62°F 1016 hPa52°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 44 mi44 min SSW 7.8 G 9.7 55°F 55°F6 ft1017.9 hPa (-0.7)
PRYC1 - 9415020 - Point Reyes, CA 48 mi52 min W 4.1 G 8.9 53°F1017.6 hPa

Wind History for Alameda, CA
(wind in knots)    EDIT      (on/off)   Help
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
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
Last
24hr
W10
G13
W11
G14
W7
W7
G11
W7
G10
W8
G11
W6
G9
W3
W5
W7
W7
W5
W4
G9
W6
SW4
SW4
G7
SW3
W6
W7
G10
W6
G9
W11
W10
G13
W10
G14
W10
G14
1 day
ago
W10
G13
SW7
G10
SW8
SW6
G10
SW7
SW6
G9
SW7
G10
SW8
SW7
SW7
G10
SW5
G8
SW7
SW6
G9
SW7
G10
SW7
SW8
W10
W8
W8
G11
SW7
G10
W12
W8
G11
W10
G13
W9
G13
2 days
ago
W8
SW10
SW8
G13
SW8
G12
SW10
G13
SW9
G14
SW12
G15
W9
G13
SW11
G16
SW9
G13
SW10
SW7
G12
SW10
SW9
SW8
G12
SW9
G12
SW7
G11
SW8
G11
SW9
G12
SW11
SW11
W9
G12
W10
G13
SW10
G14

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oakland, Metro Oakland International Airport, CA3 mi41 minW 1410.00 miMostly Cloudy60°F48°F67%1017.7 hPa
Hayward, Hayward Air Terminal, CA3 mi40 minW 1210.00 miMostly Cloudy59°F46°F64%1018.6 hPa
San Francisco, San Francisco International Airport, CA11 mi98 minW 1310.00 miMostly Cloudy62°F46°F56%1017.7 hPa
San Carlos Airport, CA11 mi47 minW 910.00 miMostly Cloudy59°F46°F63%1017.6 hPa
Palo Alto Airport, CA14 mi47 minSW 1110.00 miMostly Cloudy61°F48°F63%1017.6 hPa
Mountain View, Moffett Field, CA18 mi98 minW 710.00 miOvercast61°F48°F65%1017.8 hPa
Livermore, Livermore Municipal Airport, CA19 mi41 minW 1610.00 miMostly Cloudy59°F51°F75%1016.5 hPa
Half Moon Bay Airport, CA21 mi39 minSW 79.00 miOvercast55°F50°F82%1018.6 hPa
Concord, Buchanan Field, CA22 mi41 minWSW 1510.00 miMostly Cloudy61°F48°F63%1015.5 hPa

Wind History from OAK (wind in knots)
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
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
Last 24hrW12W13W11W9W7W8W8W6W6W6W6CalmW6SW6SW5SW5SW65W9W8W10W14W13W14
1 day agoW10W11SW8SW10SW9SW9SW9SW10SW9SW9SW8SW9SW9SW11SW10W9W11W11W9W13W14W13W15W13
2 days agoW16W9SW12W11W8SW9
G18
W8W10W10SW11SW11SW11SW11SW9SW11SW11SW11SW11SW10SW10W11W12W12W11

Tide / Current Tables for Roberts Landing, 1.3 miles west of, San Francisco Bay, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Roberts Landing
Click for Map
Thu -- 03:23 AM PDT     Moonset
Thu -- 04:03 AM PDT     1.33 feet Low Tide
Thu -- 05:52 AM PDT     Sunrise
Thu -- 09:24 AM PDT     5.77 feet High Tide
Thu -- 03:36 PM PDT     Moonrise
Thu -- 03:47 PM PDT     0.67 feet Low Tide
Thu -- 08:18 PM PDT     Sunset
Thu -- 10:09 PM PDT     7.23 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.13.72.51.61.31.72.63.855.75.75.142.71.60.90.71.22.33.85.36.67.27

Tide / Current Tables for Mulford Gardens Channel #2 SSW, South San Francisco Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Mulford Gardens Channel #2 SSW
Click for Map
Thu -- 12:06 AM PDT     -0.64 knots Max Ebb
Thu -- 03:16 AM PDT     0.00 knots Slack
Thu -- 03:23 AM PDT     Moonset
Thu -- 05:52 AM PDT     Sunrise
Thu -- 06:31 AM PDT     0.81 knots Max Flood
Thu -- 09:09 AM PDT     -0.00 knots Slack
Thu -- 12:10 PM PDT     -0.62 knots Max Ebb
Thu -- 03:18 PM PDT     0.01 knots Slack
Thu -- 03:36 PM PDT     Moonrise
Thu -- 06:48 PM PDT     1.03 knots Max Flood
Thu -- 08:19 PM PDT     Sunset
Thu -- 09:40 PM PDT     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.6-0.6-0.4-0.10.30.60.80.80.60.1-0.3-0.5-0.6-0.6-0.4-0.10.30.7110.90.4-0.1-0.5

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 San Francisco/Monterey Bay Area, CA (21,6,7,8)
      (on/off)   Help

Ground Weather Radar Station San Francisco Bay Area, 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.