Sunday, August20, 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 6:27AMSunset 7:54PM Sunday August 20, 2017 6:01 PM PDT (01:01 UTC) Moonrise 4:12AMMoonset 6:22PM Illumination 2% Phase: Waning Crescent; Moon at 28 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- 241 Pm Pdt Sun Aug 20 2017
.small craft advisory in effect until 9 pm pdt this evening...
Tonight..SW winds 15 to 25 kt...decreasing to 5 to 15 kt after midnight. Patchy fog after midnight.
Mon..SW winds 10 to 20 kt. Patchy fog in the morning.
Mon night..SW winds 10 to 20 kt. Patchy fog after midnight.
Tue..SW winds 10 to 20 kt. Patchy fog in the morning.
Tue night..SW winds 10 to 20 kt.
Wed..SW winds 15 to 25 kt.
Thu..SW winds 10 kt.
Fri..SW winds 10 kt.
PZZ500 241 Pm Pdt Sun Aug 20 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate northwest winds will continue subsiding this evening and overnight for the outer coastal waters. Typical breezy conditions are possible from the golden gate bridge to angel island through the evening hours. Winds are forecast to remain generally light for both Monday and Tuesday.

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 202348
afdmtr
area forecast discussion
national weather service san francisco bay area
448 pm pdt Sun aug 20 2017

Synopsis Cooling will continue early this week as an upper
trough of low pressure becomes nearly stationary over the eastern
pacific. Coastal areas will see little in the way of change with
continued night and morning low clouds and patchy fog.

Discussion As of 2:00 pm pdt Sunday... Clouds have burned-off
from most of our CWA although still have a few patches near and
along the coast. Temperatures have been running close to
yeterday's numbers with most locations in the 60s and 70s at the
coast with 70s and 80s inland. Satellite shows widspread clouds
off the coast, and with the marine layer still over 2000 feet plus
the onshore gradient still around 2 mb west-to-east clouds will
return back to most of the same locations overnight.

For those planning on watching the eclipse (remember to get the
correct lenses) tomorrow morning, still looks like the farther
inland you are the better shot at seeing it starting at 9 am. The
big question remains how quickly the clouds will dissipate through
the morning hours. Feeling right now is the south bay through
santa clara valley will see mostly clear conditions around the
start while farther to the north stretching from san francisco to
oakland there will likely be clouds at first. However, the hope if
they will dissipate during the hour with good viewing before the
peak time. Most of our coastal locations will likely remain cloudy
all morning.

Outside of the eclipse, not much to talk about as we are going to
continue to see overnight clouds, clearing during the day, and
temperatures remaining cool the first part of the week followed by
a modest warming trend going into the weekend as a ridge of high
pressure rebuilds into our region. No chance of rain.

Aviation As of 4:47 pm pdt Sunday... A weak surface low 120 miles
west of santa cruz tilts southward with height to a mid level nearly
stationary and dry closed low near the channel islands. This low is
producing a solid southerly wind component through the stratus field
while an onshore pressure gradient from sfo-sac is present at 2.6 mb.

Wildfire smoke entrained into this low pressure circulation continues
to be present aloft. Convection along the sierra nevada will eventually
transform into mid level cloud debris drifting westward over the area
tonight. In all, it's a difficult TAF forecast package, but thinking
is that the stratus will reach into the north bay a little more quickly
than it does over to the east bay and south bay areas including the
bay side of the sf peninsula. Stratus will prob wrap around to ksns
earlier than it reaches kmry this evening.

Warming 925 mb level temperatures results in reinforcement and possibly
some compression of the marine layer depth tonight, thus ifr CIGS and
vsbys becoming increasingly likely tonight into Monday morning.VFR
should return by mid-late Monday morning with the last places to clear
out being the north bay and along the immediate coast of santa cruz
and san mateo counties.

Vicinity of ksfo... West wind near 15 knots this evening.VFR likely
holding much of the night, tempo ifr forecast 12z-16z Monday morning.

Vfr returns Monday. Hazy due to wildfire smoke affecting slant range
visibilities.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR ifr CIGS redeveloping this evening.

Hazy due to wildfire smoke affecting slant range visibilities. Ifr
cigs tonight and Monday morning til approx 17z.

Eclipse Here are the times for the start, peak, and end of the
eclipse for Monday morning. The percent of obscuration for each
location is also listed.

Santa rosa... San francisco... Oakland... San jose... Monterey

Start... 9:01... ... ... .9:01... ... ... 9:02... ... 9:02... ... .9:02..

Peak... 10:15... ... ... 10:15... ... ..10:15... ..10:16... ... 10:16..

End... .11:37... ... ... 11:37... ... ..11:37... ..11:38... ... 11:38..

Obsur... .78%... ... ... ..76%... ... ... .76%... ... .74%... ... ..71%...

Marine As of 4:24 pm pdt Sunday... Moderate northwest winds
will continue subsiding this evening and overnight for the outer
coastal waters. Typical breezy conditions are possible from the
golden gate bridge to angel island through the evening hours.

Winds are forecast to remain generally light for both Monday and
Tuesday.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 9 pm
sca... Pt arena to pigeon pt 10-60 nm until 9 pm
public forecast: bell
aviation: canepa
marine: rowe
eclipse: bell rowe
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LNDC1 15 mi43 min W 11 G 15 67°F 1011.9 hPa
AAMC1 - 9414750 - Alameda, CA 16 mi43 min W 7 G 12 67°F 69°F1012.4 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 18 mi43 min WNW 12 G 18 79°F 1009.4 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 18 mi43 min WNW 8 G 12 65°F 1011.9 hPa
PCOC1 - 9415144 - Port Chicago, CA 18 mi43 min WSW 13 G 17 74°F 69°F1010.1 hPa
OBXC1 18 mi43 min 65°F 60°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi43 min W 11 G 16
MZXC1 - 9415102 - Martinez-Amorco CA 18 mi43 min WSW 14 G 19 72°F 69°F1010.6 hPa59°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 21 mi43 min W 8.9 G 14 66°F 1010.9 hPa
PXSC1 21 mi43 min 67°F 60°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi43 min SW 13 G 16 66°F 1012.1 hPa
RTYC1 - 9414523 - Redwood City, CA 23 mi43 min NW 9.9 G 12 71°F 73°F1010.6 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 23 mi43 min SW 15 G 19 68°F 1010.6 hPa
RCMC1 - 9414863 - Richmond, CA 24 mi49 min SSW 5.1 G 8.9 65°F 65°F1011.7 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 25 mi54 min SW 9.9 65°F 1012 hPa
FTPC1 - 9414290 - San Francisco, CA 25 mi49 min W 6 G 9.9 62°F 63°F1012.4 hPa
SFXC1 - San Francisco Bay Reserve, CA 28 mi76 min WNW 12 77°F 1009 hPa61°F
46237 - San Francisco Bar, CA (142) 34 mi61 min 61°F4 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 45 mi71 min SE 1.9 G 1.9 60°F 60°F5 ft1012.5 hPa (-0.8)

Wind History for Alameda, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Livermore, Livermore Municipal Airport, CA11 mi68 minW 1110.00 miFair80°F57°F47%1009.7 hPa
Hayward, Hayward Air Terminal, CA11 mi67 minWNW 1210.00 miA Few Clouds73°F55°F53%1012.1 hPa
Concord, Buchanan Field, CA13 mi68 minWSW 1110.00 miFair79°F57°F49%1009.2 hPa
Oakland, Metro Oakland International Airport, CA13 mi68 minNW 1210.00 miA Few Clouds71°F60°F68%1011.6 hPa
San Francisco, San Francisco International Airport, CA22 mi65 minWSW 1210.00 miA Few Clouds71°F55°F59%1011.3 hPa
Palo Alto Airport, CA22 mi74 minNNW 1510.00 miClear75°F62°F65%1010.8 hPa
San Carlos Airport, CA22 mi74 minW 810.00 miA Few Clouds75°F57°F54%1011.2 hPa

Wind History from LVK (wind in knots)
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Last 24hrNW13NW15NW11NW9NW6NW9NW8NW7NW5NW3CalmCalmCalmCalmNW34S5CalmSW7NW9W11W14W11W14
1 day agoNW11NW9W9W8W10W5W7W8NW5NW6NW6NW6N4CalmNW33CalmW8NW9NW9W11W14W14W12
2 days agoW13W12W6W6W7NW7NW9NW6NW7NW8NW6NW7NW5NW5Calm3NW4SW65NW9W7W10W12NW11

Tide / Current Tables for Oakland Airport, San Francisco Bay, California
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Oakland Airport
Click for Map
Sun -- 05:13 AM PDT     Moonrise
Sun -- 05:46 AM PDT     -0.72 feet Low Tide
Sun -- 06:29 AM PDT     Sunrise
Sun -- 12:44 PM PDT     6.20 feet High Tide
Sun -- 05:43 PM PDT     1.97 feet Low Tide
Sun -- 07:22 PM PDT     Moonset
Sun -- 07:54 PM PDT     Sunset
Sun -- 11:53 PM PDT     7.79 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.46.24.32.30.5-0.5-0.7-0.20.82.23.75.166.25.54.332.222.63.75.16.47.5

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
Sun -- 01:45 AM PDT     -2.10 knots Max Ebb
Sun -- 05:13 AM PDT     Moonrise
Sun -- 06:00 AM PDT     0.00 knots Slack
Sun -- 06:29 AM PDT     Sunrise
Sun -- 08:51 AM PDT     2.16 knots Max Flood
Sun -- 12:11 PM PDT     -0.01 knots Slack
Sun -- 02:23 PM PDT     -1.21 knots Max Ebb
Sun -- 06:00 PM PDT     0.01 knots Slack
Sun -- 07:22 PM PDT     Moonset
Sun -- 07:54 PM PDT     Sunset
Sun -- 08:38 PM PDT     1.76 knots Max Flood
Sun -- 11:41 PM PDT     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.2-1.9-2.1-1.9-1.5-0.8-01.222.21.91.20.2-0.7-1.2-1.2-1-0.6011.61.71.40.7

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 (21,6,7,8)
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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.