Monday, August20, 2018 L-36.com


Marine Weather and Tides
San Leandro, CA

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What's New / NOTES
7/21/2018 Trying to make page Mobile Friendly

Sunrise 6:28AMSunset 7:55PM Monday August 20, 2018 2:04 AM PDT (09:04 UTC) Moonrise 3:08PMMoonset 12:29AM Illumination 65% Phase: Waxing Gibbous; Moon at 9 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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PZZ531 San Francisco Bay South Of The Bay Bridge- 857 Pm Pdt Sun Aug 19 2018
Tonight..W winds 5 to 15 kt. Haze through the night.
Mon..W winds 10 kt...increasing to 10 to 20 kt in the afternoon. Haze in the morning.
Mon night..W winds 10 to 20 kt...decreasing to 5 to 15 kt after midnight.
Tue..W winds 5 to 15 kt.
Tue night..W winds 5 to 15 kt.
Wed..W winds 10 to 20 kt.
Thu..W winds 10 kt.
Fri..W winds 10 kt.
PZZ500 857 Pm Pdt Sun Aug 19 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A thermal trough along the california coast will maintain relatively light to moderate northwest winds across the coastal waters through midweek. Strongest winds are expected over the northern outer waters through Monday afternoon. In addition, onshore westerly winds will be breezy through the golden gate each afternoon. Light to moderate mixed northwest and southerly swell will persist through the rest of the weekend.


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


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 200518
afdmtr
area forecast discussion
national weather service san francisco bay area
1018 pm pdt Sun aug 19 2018

Synopsis An upper level trough will move into northern
california tonight which will bring cooler temperatures to our
entire region during the first half of the work week. A slight
rebound in temperatures is expected late in the week.

Discussion As of 09:30 pm pdt Sunday... A 581dm 500mb upper
level disturbance has dug southeastward into the pacific northwest
through the course of the day and is now centered over eugene
oregon. The broad ridge residing over the desert southwest has
yielded the northern half of california to the encroaching low
from the north which ushered in a tangible shift in the regional
weather throughout our forecast area today. Temperatures generally
reported 3 to 10 degrees cooler today versus yesterday in
response to weakening pressure and cooler air aloft. Satellite
imagery indicates that a rather dry air mass is accompanying the
base of this trough and has scoured out the marine layer from cape
mendocino southward to point reyes and will bring a less robust
marine layer for the northern counties tonight.

While the initial vorticity wave responsible for digging this
trough into northern california is progged to be ejected from the
base of the trough by midday tomorrow, the broader parent trough
will stubbornly remain in place over northern california pacnw
through midweek. A secondary vorticity wave, currently over
central british columbia, will rapidly descend southward through
the lee of the trough, reaching the base of the trough by midday
Tuesday. As this occurs, the trough will briefly intensify and
push slightly farther southward, bringing in cooler air and
weaker pressure aloft. The marine layer should also rebound and
deepen for Monday night into Tuesday morning after becoming
slightly less robust tonight. Thus, Tuesday is forecast to be the
coolest day of the upcoming week. Coastal and shoreline
communities will see temperatures in the upper 50s to 60s, with
70s for inland valleys, which is several degrees cooler than
seasonal average temperatures. Extreme inland location will see
much warmer readings in the 80s, which is near to slightly above
seasonal average temperatures. The warmest isolated, inland
locations will reach the low 90s. Locally increased onshore winds
through low lying coastal gaps is also expected as the onshore
gradient tightens.

The upper low evacuates from the broader norcal pacnw region late
Wednesday into Thursday. The desert southwest ridge will attempt
to backbuild into california late this week, however, the ridge
will be thwarted by the presence of two broad upper lows in
proximity of the golden state (a trough over the vancouver area
and a cutoff low 1000 miles west of california). As such, the san
francisco and monterey bay areas will be somewhat in the center of
3 weak features, none of which will be able to singularly
dominate the local weather pattern. This will lead to a return to
near seasonal conditions for the area, meaning a slight warming
trend (to bring us closer to normal) near the coast, with
generally light winds, and mostly clear skies sans the typical
summer morning stratus.

Aviation As of 10:18 pm pdt Sunday... Aside from coastal
lifr vlifr due to a mix of low stratus ceilings, fog, smoke and
haze spreading inland tonight and Monday morning other impacts
include reduced slant range visibilities and inland horizontal
visibilities MVFR ifr at times. Additional smoke has been
entrained in northwesterly coastal winds originating from
wildfires over far northern california and the pacific northwest
and based on the aug 19th 18z high-resolution rapid refresh model
smoke is forecast to reach the bay area by later Monday and Monday
night; along with night and morning stratus and fog, slant range
visibilities are likely to remain moderate to poor into Tuesday.

Vicinity of ksfo... It'll be hazy with a lighter westerly wind mid
evening into Monday morning. Low to moderate confidenceVFR holds
until eventually transitioning to ifr beginning 12z and lasting
to 17z Monday. Restricted slant range visibility for the period.

Sfo bridge approach... Moderate to poor slant range visibility for
the period. Otherwise similar to ksfo.

Monterey bay terminals... Ifr lifr spreading inland early-mid evening,
lifr vlifr late tonight and Monday morning. Hazy conditions likely
lingering through Monday, stratus CIGS mixing out by late Monday
morning.

Marine As of 8:57 pm pdt Sunday... A thermal trough along the
california coast will maintain relatively light to moderate
northwest winds across the coastal waters through early next week.

Strongest will are expected over the northern outer waters
through at least Monday afternoon. In addition, onshore westerly
winds will be breezy through the golden gate each afternoon. Light
to moderate mixed northwest and southerly swell will persist
through the rest of the weekend.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pigeon pt 10-60 nm
sca... Pt arena to pt reyes 0-10 nm until 4 am
public forecast: drp
aviation: canepa
marine: cw
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AAMC1 - 9414750 - Alameda, CA 9 mi41 min W 8 G 11 59°F 69°F1012.2 hPa
LNDC1 10 mi35 min WSW 7 G 11 59°F 1011.9 hPa
RTYC1 - 9414523 - Redwood City, CA 12 mi35 min SSE 1 G 1.9 59°F 73°F1012.4 hPa
OBXC1 12 mi35 min 59°F 58°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 12 mi41 min SW 13 G 15
OKXC1 - 9414776 - Oakland (Berth 34), CA 13 mi35 min SW 7 G 9.9 58°F 1011.9 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 14 mi35 min W 1 G 1.9 58°F 1010.9 hPa
PXSC1 15 mi41 min 59°F 57°F
FTPC1 - 9414290 - San Francisco, CA 18 mi41 min SW 5.1 G 11 57°F 58°F1012.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 19 mi35 min SSW 12 G 16 59°F 1011.9 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 21 mi42 min S 8.9 57°F 1012 hPa
RCMC1 - 9414863 - Richmond, CA 21 mi35 min 65°F
MZXC1 - 9415102 - Martinez-Amorco CA 25 mi35 min 68°F
46237 - San Francisco Bar, CA (142) 26 mi65 min 58°F4 ft
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 26 mi35 min SW 13 G 17 59°F 1010.7 hPa
PCOC1 - 9415144 - Port Chicago, CA 27 mi35 min W 16 G 21 60°F 69°F1010.1 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 29 mi35 min NW 15 G 20 63°F 1008.9 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 36 mi25 min NW 12 G 14 57°F 57°F1012.5 hPa
SFXC1 - San Francisco Bay Reserve, CA 37 mi80 min WNW 11 58°F 1010 hPa54°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 44 mi75 min NW 12 G 18 59°F 59°F7 ft1012.8 hPa (-0.5)
PRYC1 - 9415020 - Point Reyes, CA 48 mi41 min W 8 G 15 58°F1011.3 hPa

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oakland, Metro Oakland International Airport, CA3 mi72 minN 35.00 miFog/Mist57°F55°F93%1011.9 hPa
Hayward, Hayward Air Terminal, CA3 mi71 minNNE 46.00 miA Few Clouds with Haze58°F53°F84%1012.8 hPa
San Francisco, San Francisco International Airport, CA11 mi69 minWNW 510.00 miA Few Clouds55°F52°F90%1011.9 hPa
Mountain View, Moffett Field, CA18 mi69 minN 07.00 miFair59°F55°F90%1012.4 hPa
Livermore, Livermore Municipal Airport, CA19 mi72 minWNW 46.00 miHaze Smoke60°F51°F72%1010.6 hPa
Half Moon Bay Airport, CA21 mi65 minSE 45.00 miFog/Mist57°F53°F88%1012.9 hPa
Concord, Buchanan Field, CA22 mi72 minVar 37.00 miFair61°F50°F67%1009.2 hPa

Wind History from OAK (wind in knots)
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Last 24hrNW5NW7NW6NW5NW3NW3W4W4W5W6NW9NW14W18W19W16W16W15NW12W5NW7N3CalmN3N3
1 day agoNW4N4N4N4CalmCalmCalmW5W8W12NW11W14W13NW11NW13NW12W13NW9W13NW7W9NW8NW7NW5
2 days agoW8W7W5W3CalmCalmW3W6W6W7NW8NW12W14W17W14W15NW11NW10NW7NW5NW6NW5N3NW4

Tide / Current Tables for Roberts Landing, 1.3 miles west of, San Francisco Bay, California
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Roberts Landing
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Mon -- 01:29 AM PDT     Moonset
Mon -- 03:44 AM PDT     0.77 feet Low Tide
Mon -- 06:28 AM PDT     Sunrise
Mon -- 10:18 AM PDT     5.72 feet High Tide
Mon -- 03:26 PM PDT     2.95 feet Low Tide
Mon -- 04:07 PM PDT     Moonrise
Mon -- 07:54 PM PDT     Sunset
Mon -- 08:59 PM PDT     7.15 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.72.51.50.90.81.22.13.24.35.25.75.654.23.4333.74.75.96.87.26.96.1

Tide / Current Tables for Mulford Gardens Channel #2 SSW, South San Francisco Bay, California Current
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Mulford Gardens Channel #2 SSW
Click for Map
Mon -- 01:29 AM PDT     Moonset
Mon -- 02:55 AM PDT     0.01 knots Slack
Mon -- 06:28 AM PDT     Sunrise
Mon -- 06:31 AM PDT     0.78 knots Max Flood
Mon -- 09:23 AM PDT     -0.00 knots Slack
Mon -- 12:07 PM PDT     -0.28 knots Max Ebb
Mon -- 02:50 PM PDT     0.00 knots Slack
Mon -- 04:07 PM PDT     Moonrise
Mon -- 06:04 PM PDT     0.57 knots Max Flood
Mon -- 07:54 PM PDT     Sunset
Mon -- 08:40 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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-0.6-0.5-0.300.40.60.80.80.50.2-0.1-0.3-0.3-0.3-0.200.30.50.60.50.3-0.1-0.4-0.6

Weather Map and Satellite Images
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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.
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Wind Forecast for San Francisco/Monterey Bay Area, CA (5,6,7,8)
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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.