Monday, May29, 2017 L-36.com


Marine Weather and Tides
Union City, 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 5:47AMSunset 8:23PM Monday May 29, 2017 8:43 PM PDT (03:43 UTC) Moonrise 9:01AMMoonset 11:20PM Illumination 21% Phase: Waxing Crescent; Moon at 5 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- 226 Pm Pdt Mon May 29 2017
.small craft advisory in effect until 9 pm pdt this evening...
Tonight..W winds 10 to 20 kt. Patchy fog after midnight.
Tue..W winds 5 to 15 kt...increasing to 15 to 25 kt in the afternoon. Patchy fog in the morning.
Tue night..W winds 15 to 25 kt. Slight chance of showers after midnight.
Wed..W winds 10 to 20 kt. Slight chance of showers in the morning.
Wed night..W winds 10 to 20 kt. Patchy fog after midnight.
Thu..W winds 5 to 15 kt. Patchy fog.
Fri..W winds 10 kt. Patchy fog.
Sat..SW winds 10 kt. Patchy fog.
PZZ500 226 Pm 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... Strong and gusty northerly winds will generate steep wind waves and fresh swell...making for adverse and hazardous seas through at least Tuesday night for the coastal waters. Winds are forecast to decrease Wednesday as a weak front moves through the area and the surface pressure gradient weakens.

7 Day Forecast for Marine Location Near Union City, CA
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location: 37.6, -122     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 300006
afdmtr
area forecast discussion
national weather service san francisco bay area
506 pm pdt Mon may 29 2017

Synopsis Continued seasonably cool and breezy through midweek
with a slight chance of showers late Tuesday night into Wednesday
as an upper trough moves through. A drying and warming trend
Thursday into next weekend.

Discussion As of 2:01 pm pdt Monday... Low clouds were slow to
clear this morning and now some high clouds continue to filter
overhead while marine clouds persist from san francisco to
monterey. This has kept memorial day temperatures on the cool side
of normal so far but with filtered sunshine expect a few more
degrees of warming this afternoon. Onshore gradient remains
moderate around 3 mb with 21 mph winds observed at the golden
gate.

Synoptic pattern features an upper trough that will keep moderate
onshore winds in place overnight into Tuesday with low clouds
expected to reform and surge inland overnight.

Not expecting big changes for Tuesday but the stage will be set
for another breezy day around the bay. NAM 925 mb winds will
increase through the afternoon and evening hours in response to
the incoming trough. Will be expecting some morning drizzle with
this pattern on Tuesday morning followed by gusty westerly winds
through the afternoon evening hours.

Have kept slight chance of showers in the forecast late Tuesday
night into weds as trough axis passes through. Not expecting
anything more than some hit or miss showers.

The pattern will begin to transition by weds night and expect
modest warming and drying Thursday and into next weekend as high
pressure rebuilds. Surface gradients look to remain moderate so
expect breezy afternoons as we finish may and head into june.

Aviation 4:49 pm pdt Monday for 00z tafs... While most of the
stratus has scattered out across the region this afternoon a
couple of stubborn patches of stratus have maintained borderline
MVFR ifr CIGS over the monterey and san francisco bay terminals.

Partial temporary breaks in the clouds are possible this
afternoon evening however these terminals will likely fill back
in early this evening. Elsewhere stratus is forecast to return
around 05z-06z tonight. Moderate and locally gusty onshore flow
will persist through this evening then gradually diminish
overnight. Tuesday will likely be a repeat of today with regard to
cigs with some locations only seeing partial clearing if any.

Moderate confidence.

Vicinity of ksfo... MVFR CIGS will prevail through late tonight
with CIGS dropping to ifr after 10z Tuesday morning. CIGS are
anticipated to lift to MVFR after 19z Tuesday however only
partial or temporary clearing is expected if any. Moderate to
locally strong and gusty westerly winds will persist through this
evening then diminish slightly overnight to around 10 to 15 kt
sustained.

Sfo bridge approach... A line of clouds around 1200 feet stretched
out across the bay from ksfo to koak will prevail through this
evening then gradually fill in across the bay overnight. Clouds
over the approach are anticipated to scatter out around 21z
Tuesday afternoon.

Monterey bay terminals... MVFR CIGS will quickly drop to ifr after
02z-03z this evening. CIGS over kmry will likely drop to lifr
around 400 ft after 10z tonight. CIGS over kmry are anticipated
to lift to MVFR after 18z Tuesday however only partial or
temporary clearing is expected if any. CIGS over ksns will scatter
out around 19z. Moderate westerly winds will persist through this
evening then gradually diminish overnight.

Marine As of 2:26 pm pdt Monday... Strong and gusty northerly
winds will generate steep wind waves and fresh swell... Making for
adverse and hazardous seas through at least Tuesday night for the
coastal waters. Winds are forecast to decrease Wednesday as a
weak front moves through the area and the surface pressure
gradient weakens.

Mtr watches warnings advisories
Tngt 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
sca... Sf bay
public forecast: rww
aviation: cw
marine: bam
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 13 mi43 min W 15 G 19 55°F 67°F1014.6 hPa (+1.3)
LNDC1 20 mi49 min WSW 9.9 G 13 57°F 1013.9 hPa
AAMC1 - 9414750 - Alameda, CA 20 mi43 min W 6 G 12 56°F 64°F1014.5 hPa (+0.3)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 22 mi43 min WSW 5.1 G 8
OBXC1 23 mi43 min 57°F 52°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 23 mi43 min WSW 1.9 G 6 57°F 1013.8 hPa (+0.4)
PXSC1 25 mi43 min 56°F 51°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 25 mi43 min WSW 8.9 G 14 55°F 1012.6 hPa (+0.6)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 29 mi43 min ESE 4.1 G 6 61°F 1013.6 hPa
FTPC1 - 9414290 - San Francisco, CA 29 mi43 min WSW 9.9 G 15 55°F 56°F1013.8 hPa (+0.3)
MZXC1 - 9415102 - Martinez-Amorco CA 31 mi43 min WSW 12 G 14 62°F 65°F1013.1 hPa (+1.1)54°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 31 mi43 min WNW 13 G 18 63°F 1011.2 hPa (+0.9)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 31 mi61 min SSE 5.1 59°F 1013 hPa
RCMC1 - 9414863 - Richmond, CA 31 mi43 min NNW 7 G 9.9 59°F 58°F1012.9 hPa (+0.6)
UPBC1 31 mi43 min W 14 G 16
PCOC1 - 9415144 - Port Chicago, CA 32 mi43 min SSW 8 G 15 59°F 66°F1012.5 hPa (+1.2)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 34 mi43 min W 9.9 G 14 60°F 1012.7 hPa (+1.0)
46237 - San Francisco Bar, CA (142) 36 mi43 min 53°F6 ft
SFXC1 - San Francisco Bay Reserve, CA 41 mi58 min W 9.9 63°F 1012 hPa55°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 46 mi53 min NW 21 G 29 53°F 52°F8 ft1014.3 hPa (-0.0)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 49 mi53 min NW 19 G 25 54°F 53°F8 ft1015 hPa (+0.3)

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hayward, Hayward Air Terminal, CA8 mi49 minWSW 1010.00 miOvercast57°F48°F72%1015.7 hPa
Palo Alto Airport, CA10 mi56 minWNW 1410.00 miPartly Cloudy57°F51°F82%1014.6 hPa
Mountain View, Moffett Field, CA12 mi1.8 hrsNNW 1110.00 miFair61°F51°F70%1014.4 hPa
Livermore, Livermore Municipal Airport, CA12 mi50 minW 1010.00 mi56°F48°F77%1013.9 hPa
San Carlos Airport, CA14 mi1.9 hrsWSW 14 G 1710.00 miMostly Cloudy57°F50°F77%1014.6 hPa
Oakland, Metro Oakland International Airport, CA14 mi50 minWSW 169.00 miMostly Cloudy58°F52°F81%1014.7 hPa
San Jose, San Jose International Airport, CA16 mi50 minNW 1310.00 miPartly Cloudy59°F52°F78%1014.6 hPa
San Francisco, San Francisco International Airport, CA19 mi47 minW 20 G 2710.00 miOvercast and Breezy55°F48°F77%1014.6 hPa
San Jose / Reid / Hillv, CA20 mi56 minNNW 1510.00 miPartly Cloudy59°F50°F72%1015.2 hPa

Wind History from HWD (wind in knots)
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Last 24hrW9W10W8W11W9W10W9W8SW106--W8W9W8W10W9W12W14W11
G20
--W13
G22
W13W8W10
1 day agoNW8NW11NW8W8W8W8W6W8SW5W5W6W6NW4NW6W6W8W8W11W12NW11W12W12W12W8
2 days agoNW9NW6NW6W6NW5W3W4W4SW5W6SW5SW6SW7SW55W10
G14
W9NW9NW13
G17
NW14W14NW14W11NW10

Tide / Current Tables for Newark Slough, San Francisco Bay, California
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Newark Slough
Click for Map
Mon -- 03:31 AM PDT     8.73 feet High Tide
Mon -- 05:49 AM PDT     Sunrise
Mon -- 10:02 AM PDT     Moonrise
Mon -- 11:04 AM PDT     -1.28 feet Low Tide
Mon -- 05:43 PM PDT     7.67 feet High Tide
Mon -- 08:22 PM PDT     Sunset
Mon -- 11:24 PM PDT     2.58 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
45.77.48.58.77.96.44.42.30.4-0.8-1.3-0.80.52.44.46.27.47.675.84.43.22.6

Tide / Current Tables for Dumbarton Bridge, San Francisco Bay, California Current
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Dumbarton Bridge
Click for Map
Mon -- 01:23 AM PDT     1.48 knots Max Flood
Mon -- 04:34 AM PDT     -0.00 knots Slack
Mon -- 05:50 AM PDT     Sunrise
Mon -- 07:42 AM PDT     -1.85 knots Max Ebb
Mon -- 10:02 AM PDT     Moonrise
Mon -- 11:14 AM PDT     0.00 knots Slack
Mon -- 02:31 PM PDT     1.96 knots Max Flood
Mon -- 06:35 PM PDT     -0.00 knots Slack
Mon -- 08:22 PM PDT     Sunset
Mon -- 08:31 PM PDT     -0.73 knots Max Ebb
Mon -- 11:15 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.11.41.410.4-0.3-1.1-1.7-1.8-1.5-0.9-0.20.71.51.91.91.61.10.4-0.3-0.7-0.7-0.5-0.1

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 (23,6,7,8)
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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.