Wednesday, July26, 2017 L-36.com


Marine Weather and Tides
Danville, 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 6:05AMSunset 8:23PM Tuesday July 25, 2017 9:36 PM PDT (04:36 UTC) Moonrise 7:40AMMoonset 9:10PM Illumination 7% Phase: Waxing Crescent; Moon at 3 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- 900 Pm Pdt Tue Jul 25 2017
.small craft advisory in effect until 10 pm pdt this evening...
Tonight..SW winds 15 to 25 kt.
Wed..SW winds 10 to 20 kt.
Wed night..SW winds 10 to 20 kt.
Thu..SW winds 10 to 20 kt.
Thu night..SW winds 10 to 20 kt.
Fri..SW winds 10 to 20 kt...decreasing to 10 kt.
Sat..W winds 10 kt.
Sun..W winds 10 kt.
PZZ500 900 Pm Pdt Tue Jul 25 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A weak area of low pressure off the california coast will continue to produce a southerly flow today along the immediate coast. West to northwest winds will return tomorrow as high pressure builds over the eastern pacific. SEveral tropical disturbances in the pacific will bring a long period southerly swell to the coastal waters at the end of the week and through weekend.

7 Day Forecast for Marine Location Near Danville, CA
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location: 37.79, -122     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 260412
afdmtr
area forecast discussion
national weather service san francisco bay area
912 pm pdt Tue jul 25 2017

Synopsis A gradual warming trend will get underway beginning on
Wednesday and continue through late week. By Thursday and into the
weekend, afternoon temperatures will warm to above seasonal averages
for inland areas while coastal locations remain cooler. Above average
temperatures are then likely to persist into early next week.

Discussion As of 9:12 pm pdt Tuesday... A vertically extensive,
nearly stationary, and dry low pressure area is located near the
bay area this evening. This low is dry except it is responsible
for helping to produce ongoing scattered thunderstorms over the
highest terrain of northern and eastern california.

It was a nice late july day, and temperatures have settled back
and remain comfortable over most if not all locations this evening
with 9 pm temperatures in the upper 50s along the immediate coast
and 60s near the bays and inland valleys. A deep marine layer will
persist tonight into Wednesday with clouds and fog coverage similar
to last night's and early this morning's coverage. The aforementioned
low pressure area will gradually dissipate and move eastward through
mid-week. A mid-upper level high pressure will redevelop and cause
a warming trend into this weekend and next week.

Prev discussion As of 01:38 pm pdt Tuesday... Temperatures across
the region this afternoon are generally running near to a few
degrees above those 24 hours ago. In addition, low clouds have
mixed out well given the deep marine layer in place with mostly
sunny conditions for most coastal and just about all inland areas.

With the marine layer forecast to remain between 2000-2500 feet
in depth overnight, look for low clouds to return to the coast
late this evening and then spread inland through the overnight.

The mid upper level trough and associated low pressure system that
has brought a few days of cooler than average temperatures to the
region will begin to lift northward on Wednesday. This will allow
for the air mass aloft to warm as the upper level high over the
southern portion of the country builds back toward the west coast.

Thus, look for a warming trend to begin by Wednesday afternoon with
temperatures up by about 3 to 6 degrees for inland areas. Meanwhile,
coastal areas will continue to stay around seasonal averages due to
continued onshore flow and marine influences.

Additional warming is expected from late in the week into early next
week as the mid upper level ridge of high pressure builds over the
southwestern portion of the country. There remains model differences
in the placement of the ridge as well as how strong it will become.

Thus, it is difficult at this time to nail down exactly which day
will be the warmest. However, do expect inland temperatures to warm
to above seasonal averages with 90s more widespread in the higher
elevations and in the valleys interior. By late week, will also see
temperatures in the warmest inland areas warming into the 100-105
degree mark. At this time, not expecting widespread heat impacts,
yet will need to monitor given the current level of uncertainty in
the models. With the ridge building aloft, also expect the marine
layer to become more compressed with less inland penetration of
overnight morning low clouds. Also worth noting, conditions near the
coast are not forecast to warm all that much given the persistent
onshore flow and typical influences from the pacific.

Aviation As of 4:55 pm pdt Tuesday... For 00z tafs... Clear
skies prevail across area terminals at this hour with southerly
flow once again along the coast. Will maintain a persistence
forecast similar to Monday. Downsloping will keep CIGS out of
select terminals till later tonight while others will see cigs
return earlier. See tafs for more detailed information.

Moderate confidence.

Vicinity of ksfo...VFR conditions will prevail through late
tonight with MVFR ifr CIGS returning around 11z-12z Wednesday
morning. CIGS will scatter out around 17z Wednesday morning.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR conditions will prevail through late
this evening over kmry while MVFR CIGS are anticipated to return
to ksns by early evening as a result of the southerly flow along
the coast. Downsloping will keep kmry cloud-free a bit longer
than ksns but the deep 2400 ft marine layer will help bring cigs
back to kmry around 05z. CIGS will scatter out around 17z-18z
Wednesday morning.

Marine As of 2:21 pm pdt Tuesday... A weak area of low pressure
off the california coast will continue to produce a southerly
flow today along the immediate coast. West to northwest winds will
return tomorrow as high pressure builds over the eastern pacific.

Several tropical disturbances in the pacific will bring a long
period southerly swell to the coastal waters at the end of the
week and through weekend.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 10 pm
public forecast: canepa rgass
aviation: cw
marine: anna
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LNDC1 15 mi55 min NW 4.1 G 6 62°F 1014.8 hPa
AAMC1 - 9414750 - Alameda, CA 16 mi49 min WNW 8.9 G 12 62°F 69°F1015.4 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 18 mi49 min WNW 13 G 16 71°F 1012.9 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi49 min W 8 G 9.9
PCOC1 - 9415144 - Port Chicago, CA 18 mi49 min WSW 9.9 G 14 64°F 71°F1013.8 hPa
OBXC1 18 mi49 min 61°F 58°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 18 mi49 min W 8.9 G 11 61°F 1014.9 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 18 mi49 min WSW 12 G 17 64°F 69°F1014.3 hPa59°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 21 mi49 min W 8 G 13 60°F 1013.8 hPa
PXSC1 21 mi49 min 62°F 57°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi49 min SW 8 G 11 61°F 1015.2 hPa
RTYC1 - 9414523 - Redwood City, CA 23 mi49 min NNW 7 G 8 64°F 74°F1013.9 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 23 mi49 min SW 14 G 16 62°F 1014.2 hPa
RCMC1 - 9414863 - Richmond, CA 24 mi49 min SW 2.9 G 8 61°F 62°F1014.8 hPa
FTPC1 - 9414290 - San Francisco, CA 25 mi49 min W 8 G 13 59°F 59°F1015.3 hPa
SFXC1 - San Francisco Bay Reserve, CA 28 mi112 min NW 8.9 70°F 1012 hPa57°F
46237 - San Francisco Bar, CA (142) 34 mi67 min 57°F3 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 45 mi47 min SE 3.9 G 5.8 56°F 55°F4 ft1015.3 hPa (+0.6)

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Livermore, Livermore Municipal Airport, CA11 mi44 minW 710.00 miFair65°F55°F70%1013.7 hPa
Hayward, Hayward Air Terminal, CA11 mi43 minNNW 810.00 miFair65°F53°F66%1015.5 hPa
Concord, Buchanan Field, CA13 mi44 minWSW 810.00 miFair68°F55°F63%1012.7 hPa
Oakland, Metro Oakland International Airport, CA13 mi44 minNNW 910.00 miA Few Clouds61°F57°F87%1014.8 hPa
San Francisco, San Francisco International Airport, CA22 mi41 minWNW 810.00 miA Few Clouds67°F54°F63%1014.5 hPa
Palo Alto Airport, CA22 mi50 minNNW 1110.00 miClear66°F59°F78%1014.6 hPa

Wind History from LVK (wind in knots)
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Last 24hrNW3W7W4S4SW3S5W4W3NW5NW5CalmW4NW3SW4W5S5W4NW10NW11NW12NW14W13W12W7
1 day agoW7W6SW5W7W8W3NW63CalmW5NW5CalmCalmSW66SW76SW12W12
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2 days agoW6CalmCalmCalmCalmCalmNE4CalmCalmCalmCalmCalmS3SW6SW4W6W8NW10W12W12W15W13W10W10

Tide / Current Tables for Oakland Airport, San Francisco Bay, California
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Oakland Airport
Click for Map
Wed -- 02:30 AM PDT     7.12 feet High Tide
Wed -- 06:07 AM PDT     Sunrise
Wed -- 09:04 AM PDT     -0.51 feet Low Tide
Wed -- 09:46 AM PDT     Moonrise
Wed -- 04:04 PM PDT     6.45 feet High Tide
Wed -- 08:22 PM PDT     Sunset
Wed -- 09:28 PM PDT     1.92 feet Low Tide
Wed -- 10:46 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.16.3776.24.82.91.1-0.1-0.5-0.20.72.13.5566.46.15.13.82.6222.6

Tide / Current Tables for Oakland Harbor High Street Bridge, San Francisco Bay, California Current
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Oakland Harbor High Street Bridge
Click for Map
Wed -- 02:20 AM PDT     -0.00 knots Slack
Wed -- 05:09 AM PDT     -2.00 knots Max Ebb
Wed -- 06:07 AM PDT     Sunrise
Wed -- 09:19 AM PDT     0.01 knots Slack
Wed -- 09:46 AM PDT     Moonrise
Wed -- 12:04 PM PDT     2.06 knots Max Flood
Wed -- 03:32 PM PDT     -0.01 knots Slack
Wed -- 05:44 PM PDT     -1.33 knots Max Ebb
Wed -- 08:22 PM PDT     Sunset
Wed -- 09:36 PM PDT     0.00 knots Slack
Wed -- 10:46 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.61.10.3-0.7-1.6-2-1.9-1.5-0.9-0.20.81.72.11.91.40.5-0.5-1.2-1.3-1.1-0.8-0.30.31.2

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 San Francisco/Monterey Bay Area, CA (0,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, 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.