Monday, May29, 2017 L-36.com


Marine Weather and Tides
Danville, CA

Version 3.4
What's New / NOTES
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 5:46AMSunset 8:24PM Monday May 29, 2017 10:11 AM PDT (17:11 UTC) Moonrise 9:01AMMoonset 11:20PM Illumination 18% Phase: Waxing Crescent; Moon at 4 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- 829 Am Pdt Mon May 29 2017
.small craft advisory in effect from noon pdt today through this evening...
Today..SW winds 10 to 20 kt...increasing to 15 to 25 kt in the afternoon. Patchy fog late in the morning.
Tonight..SW winds 15 to 25 kt...decreasing to 5 to 15 kt overnight. Patchy fog after midnight. Patchy drizzle after midnight.
Tue..SW winds 15 to 25 kt. Patchy fog in the morning. Patchy drizzle in the morning.
Tue night..W winds 15 to 25 kt. Slight chance of showers after midnight.
Wed..W winds 15 to 25 kt. Patchy fog after midnight.
Thu..SW winds 5 to 15 kt. Patchy fog.
Fri..SW winds 10 kt. Patchy fog.
PZZ500 829 Am Pdt Mon May 29 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gusty northerly winds will continue over the coastal waters and eventually over the bays today as the surface pressure gradient tightens. Steep winds waves and fresh swell will cause rough and hazardous seas. Winds will decrease mid week as a weak frontal system moves through the coastal waters.

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 291605
afdmtr
area forecast discussion
national weather service san francisco bay area
905 am pdt Mon may 29 2017

Synopsis Turning mostly sunny inland this afternoon with clouds
persisting along the coast. Temperatures to remain near or
slightly below normal through Wednesday then nudging slightly
warmer by Thursday and Friday with continued dry conditions.

Discussion As of 9:05 am pdt Monday... No forecast updates
planned for this morning. Its a cloudy start for most of the
valleys with the marine layer around 2000 feet deep. The sfo to
sac gradient is already 3 mb so breezy west winds will continue to
increase this afternoon keeping any warmth around the bay in
check. The flow aloft remains cyclonic with moderate surface
pressure gradients and a marine layer in place through at least
midweek. This all points to continued near or slightly below
normal temps for the last few days of may. Some morning drizzle is
possible again Tuesday morning near the coast and coastal hills
with persistent onshore flow and some weak synoptic lift.

Mid and long range ECMWF solution keeps the district dry with what
looks to be a pretty seasonable weather pattern. No big warm-ups
noted with strong pressure gradients off CAPE mendocino keeping
persistent NW flow in place over the coastal waters and along the
coast.

Prev discussion As of 3:00 pm pdt Monday... Widespread clouds
overnight for many spots with the marine layer still at 1500 feet
plus a moderate onshore flow. Similar to yesterday, most spots are
in the 50s and should see lows mostly in the upper 40s to the mid
50s by day break.

Today will be a near repeat of yesterday with clouds forecast to
slowly burn-off toward the coast by late in the morning. Yesterday
turned out to be a bit of a surprise in the east bay with a very
late transition to sunny skies. Models hint at the possibility
again today which could keep temps running a bit lower than
forecast. Outside of that, no issues anticipated with highs
expected to range from the 60s at the coast up to the 70s and
lower 80s inland. A few locations well inland could get into the
mid to upper 80s. Tonight will feature another round of patchy fog
and drizzle mainly near the coast.

Synoptically an upper level low will works it's way to the bc
coastline while an associated trough advances to the west coast.

Ahead of the main trough, a weak shortwave will move through on
Tuesday which will start to deepen the marine layer and provide a
degree or two of cooling. More substantial cooling (especially
inland) can be expected on Wednesday as the main trough moves
onshore. At the same time enough instability and associated
moisture could lead to a few showers late Tuesday into Wednesday,
although latest guidance has backed off a bit. Winds will also
pick up on Wednesday as the onshore flow increases. Westerly winds
of 10 to 20 mph with local gusts to 30 mph can be expected.

A weak ridge of high pressure will start to rebuild into our
region going to the end of the week. Highs will return back to
near normal levels.

Aviation 04:25 am pdt Monday for 12z tafs... Widespread clouds
with solid marine layer and mainly ifr conditions. Clouds will be
slow to clear today and the immediate coast may not clear at all.

Gusty onshore flow later today. CIGS return tonight.

Vicinity of ksfo... Ifr CIGS through 19z withVFR there after.

Guidance still shows strong west winds this afternoon with gusts
up to 25 or 30 kt. CIGS return early tonight.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Ifr CIGS through this morning. CIGS will
gradually lift, but conf is low that any clearing will occur at
kmry more likely at ksns. Winds will increase Monday afternoon
out of the west at 10 to 20 kt. CIGS return early tonight.

Marine As of 08:55 am pdt Monday... Gusty northerly winds will
continue over the coastal waters and eventually over the bays
today as the surface pressure gradient tightens. Steep winds waves
and fresh swell will cause rough and hazardous seas. Winds will
decrease mid week as a weak frontal system moves through the
coastal waters.

Mtr watches warnings advisories
Tday Sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Mry bay from 12 pm
sca... Sf bay from 12 pm
public forecast: rww
aviation: bam
marine: bam
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LNDC1 15 mi42 min WSW 11 G 15 53°F 1016.2 hPa
AAMC1 - 9414750 - Alameda, CA 16 mi42 min W 8 G 12 53°F 63°F1016.8 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 18 mi42 min WSW 5.1 G 9.9 54°F 1016.1 hPa
PCOC1 - 9415144 - Port Chicago, CA 18 mi42 min WSW 14 G 16 58°F 64°F1015 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 18 mi42 min WNW 14 G 19 60°F 1014 hPa
UPBC1 18 mi42 min WNW 13 G 16
OBXC1 18 mi42 min 53°F 52°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi42 min SW 8.9 G 15
MZXC1 - 9415102 - Martinez-Amorco CA 18 mi42 min W 13 G 15 57°F 64°F1015.4 hPa54°F
PXSC1 21 mi42 min 53°F 51°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi42 min SSE 4.1 G 5.1 55°F 1016.2 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 21 mi48 min WSW 5.1 G 12 53°F 1015 hPa
RTYC1 - 9414523 - Redwood City, CA 23 mi42 min W 12 G 14 54°F 66°F1016.3 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 23 mi42 min SW 9.9 G 12 55°F 1015.3 hPa
RCMC1 - 9414863 - Richmond, CA 24 mi42 min ESE 1.9 G 4.1 55°F 60°F1015.6 hPa
FTPC1 - 9414290 - San Francisco, CA 25 mi42 min W 7 G 11 53°F 57°F1016.2 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 25 mi50 min NE 2.9 55°F 1016 hPa
SFXC1 - San Francisco Bay Reserve, CA 28 mi87 min WNW 12 58°F 1015 hPa54°F
46237 - San Francisco Bar, CA (142) 34 mi42 min 55°F6 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 45 mi82 min NW 19 G 21 51°F 52°F7 ft1016.5 hPa (+0.7)

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Livermore, Livermore Municipal Airport, CA11 mi79 minW 810.00 miOvercast55°F50°F83%1015.8 hPa
Hayward, Hayward Air Terminal, CA11 mi78 minW 910.00 miOvercast55°F48°F77%1017.7 hPa
Concord, Buchanan Field, CA13 mi79 minS 12 G 1910.00 miFair58°F51°F78%1014 hPa
Oakland, Metro Oakland International Airport, CA13 mi79 minW 107.00 miLight Drizzle55°F52°F90%1016.7 hPa
San Francisco, San Francisco International Airport, CA22 mi76 minW 14 G 228.00 miOvercast53°F48°F86%1016.5 hPa
Palo Alto Airport, CA22 mi2.4 hrsNW 810.00 miMostly Cloudy57°F51°F82%1016.6 hPa
San Carlos Airport, CA22 mi82 minWSW 10 G 157.00 miOvercast54°F50°F88%1016.9 hPa

Wind History from LVK (wind in knots)
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Last 24hr56W10W12NW10W13W15NW12W12W11W10W10W6W6W9W9W9W7W9W7W5W7W8W10
1 day agoSW5NW11W8W10NW14W13W15W11W12W14W12W8W8W7W6W5W4SW6W3W5W6W6W73
2 days agoSW8--SW5SW8SW11SW8W8
G17
NW10W12W12W10W11W9W8W6NW3CalmW3S3W4W4W5NW54

Tide / Current Tables for Oakland Airport, San Francisco Bay, California
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Oakland Airport
Click for Map
Mon -- 03:00 AM PDT     7.05 feet High Tide
Mon -- 05:49 AM PDT     Sunrise
Mon -- 09:51 AM PDT     -1.32 feet Low Tide
Mon -- 10:02 AM PDT     Moonrise
Mon -- 05:12 PM PDT     5.83 feet High Tide
Mon -- 08:23 PM PDT     Sunset
Mon -- 10:11 PM PDT     2.38 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.55.76.77.16.75.53.81.80-1-1.3-0.90.11.42.94.35.35.85.64.83.72.82.42.6

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
Mon -- 02:42 AM PDT     -0.00 knots Slack
Mon -- 05:47 AM PDT     -2.10 knots Max Ebb
Mon -- 05:49 AM PDT     Sunrise
Mon -- 10:02 AM PDT     Moonrise
Mon -- 10:05 AM PDT     0.00 knots Slack
Mon -- 12:55 PM PDT     2.04 knots Max Flood
Mon -- 04:37 PM PDT     -0.01 knots Slack
Mon -- 06:33 PM PDT     -1.00 knots Max Ebb
Mon -- 08:23 PM PDT     Sunset
Mon -- 10:18 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.41.10.5-0.2-1.2-1.9-2.1-1.8-1.4-0.8-0.111.821.91.40.6-0.3-0.9-1-0.8-0.5-0.10.5

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 (13,3,4,5)
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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.