Sunday, May20, 2018 L-36.com


Marine Weather and Tides
Union City, CA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 5:52AMSunset 8:16PM Sunday May 20, 2018 10:54 AM PDT (17:54 UTC) Moonrise 10:14AMMoonset 12:00AM Illumination 33% Phase: Waxing Crescent; Moon at 6 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 The San Francisco Bay North Of The Bay Bridge- 830 Am Pdt Sun May 20 2018
.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 this afternoon. Gusts up to 30 kt.
Tonight..SW winds 10 to 20 kt with gusts up to 25 kt.
Mon..SW winds 10 to 20 kt with gusts up to 30 kt.
Mon night..SW winds 10 to 20 kt with gusts up to 30 kt.
Tue..SW winds 10 to 15 kt with gusts up to 25 kt.
Tue night..SW winds 5 to 15 kt.
Wed..SW winds 5 to 10 kt.
Thu..SW winds 5 to 15 kt.
PZZ500 830 Am Pdt Sun May 20 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A strong north to south pressure gradient along the california coast will maintain moderate to strong northwesterly winds over the coastal waters through Monday. As a result, steep wind waves will produce hazardous conditions for small crafts. A long period southerly swell will increase and mix with northwesterly swell by Monday morning, gradually increasing through much of the week.

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 201736
afdmtr
area forecast discussion
national weather service san francisco bay area
1036 am pdt Sun may 20 2018

Synopsis A deep marine layer will allow for continued overnight
and morning clouds along the coast the next few days. Temperatures
will remain seasonably cool this week and into next weekend.

Discussion As of 8:59 am pdt Sunday... Deep marine layer around
3000 feet this morning with clouds inundating most areas from sf
southward. Clouds will be slow to clear with upper trough and
continued onshore flow. Afternoon highs still below normal on
average for inland areas with highs only in the 70s once the sun
breaks out. 12z NAM shows some more coastal drizzle tonight into
early Monday morning with cyclonic flow aloft, deep marine layer
and moist onshore flow. Upper trough will be slow to move over
southern california Monday and Tuesday with the end result being
continued below normal temperatures for the bay area with morning
clouds followed by afternoon sunshine.

There may be some weak midweek upper ridging but the net result
wont be too much change in the sensible weather with daytime highs
generally 60s coast and 70s inland with very few sites reaching
the 80s this week, so overall trend of below normal.

Long range models indicate a stronger upper trough approaches for
memorial day weekend implying continued below normal temps.

Aviation As of 10:35 am pdt Sunday... For 18z tafs. MVFR
ceilings continue to impact the san francisco bay and monterey bay
terminals this morning. Should see some partial clearing this
afternoon for the san francisco bay terminals with low clouds
likely to remain in place over the monterey bay terminals though
much of the day. Onshore winds will also increase and become gusty
at times through the afternoon and evening hours. Low clouds make
an early return once again given the deep marine layer in place
with winds diminishing slightly into Monday morning.

Moderate forecast confidence.

Vicinity of ksfo... MVFR ceilings through at least 20-21z, with
the possibility of only partial clearing this afternoon. Westerly
breezy gusty winds will continue through the day and evening. Low
MVFR ceilings, if they do scatter out, likely to make early return
late this evening.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR ceilings likely to persist over the
monterey bay terminals through the forecast period. Slight chance
of brief clearing at ksns this afternoon, but confidence is low.

Ceilings may lower to ifr tonight and into early Monday morning.

Breezy onshore winds, occasionally gusty this afternoon and
evening.

Marine As of 08:49 am pdt Sunday... A strong north to south
pressure gradient along the california coast will maintain
moderate to strong northwesterly winds over the coastal waters
through Monday. As a result, steep wind waves will produce
hazardous conditions for small crafts. A long period southerly
swell will increase and mix with northwesterly swell by Monday
morning, gradually increasing through much of the week.

Mtr watches warnings advisories
Tday Sca... Sf bay from 12 pm
sca... Mry bay from 12 pm
sca... Pigeon pt to pt pinos 0-10 nm from 12 pm
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 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
public forecast: rww
aviation: rgass
marine: rgass
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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 mi54 min W 8 G 9.9 55°F 65°F1016.9 hPa (+0.7)
LNDC1 20 mi54 min W 5.1 G 8 56°F 1015.1 hPa (+0.6)
AAMC1 - 9414750 - Alameda, CA 20 mi54 min W 8.9 G 13 56°F 62°F1015.4 hPa (+0.6)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 22 mi54 min WNW 8 G 11
OBXC1 23 mi54 min 56°F 50°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 23 mi54 min W 6 G 8.9 56°F 1015.1 hPa (+0.6)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 25 mi54 min W 9.9 G 15 56°F 1014.1 hPa (+0.7)
PXSC1 25 mi54 min 56°F 49°F
FTPC1 - 9414290 - San Francisco, CA 29 mi54 min W 7 G 13 55°F 56°F1015.4 hPa (+0.7)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 29 mi54 min S 4.1 G 8.9 57°F 1015.3 hPa (+0.9)
RCMC1 - 9414863 - Richmond, CA 31 mi54 min NNW 2.9 G 5.1 56°F 60°F1014.7 hPa (+0.6)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 31 mi54 min W 12 G 19 58°F 1014 hPa (+0.4)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 31 mi61 min SE 5.1 55°F 1015 hPa (+1.0)
MZXC1 - 9415102 - Martinez-Amorco CA 31 mi54 min WSW 8 G 9.9 57°F 63°F1014.6 hPa (+0.5)52°F
PCOC1 - 9415144 - Port Chicago, CA 32 mi54 min SSW 6 G 14 58°F 63°F1014.3 hPa (+0.5)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 34 mi54 min SW 7 G 11 56°F 1014.4 hPa (+0.6)
46237 - San Francisco Bar, CA (142) 36 mi54 min 54°F5 ft
SFXC1 - San Francisco Bay Reserve, CA 41 mi69 min WNW 11 58°F 1014 hPa50°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 46 mi44 min WNW 18 G 23 53°F 51°F1016.5 hPa50°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 49 mi64 min NW 18 G 21 54°F 54°F7 ft1016.4 hPa (+0.7)

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hayward, Hayward Air Terminal, CA8 mi60 minWSW 1110.00 miOvercast56°F46°F70%1017.1 hPa
Palo Alto Airport, CA10 mi2.1 hrsW 610.00 miMostly Cloudy0°F0°F%1016.6 hPa
Mountain View, Moffett Field, CA12 mi58 minW 810.00 miOvercast58°F45°F62%1016.9 hPa
Livermore, Livermore Municipal Airport, CA12 mi61 minWSW 1210.00 miOvercast56°F50°F81%1015.4 hPa
San Carlos Airport, CA14 mi64 minW 810.00 miOvercast55°F44°F67%1017.3 hPa
Oakland, Metro Oakland International Airport, CA14 mi61 minW 1710.00 miMostly Cloudy56°F48°F75%1015.7 hPa
San Jose, San Jose International Airport, CA16 mi61 minNW 610.00 miMostly Cloudy59°F45°F60%1016.4 hPa
San Francisco, San Francisco International Airport, CA19 mi58 minW 18 G 2510.00 miMostly Cloudy and Breezy57°F45°F64%1015.6 hPa
San Jose / Reid / Hillv, CA20 mi67 minNW 810.00 miOvercast59°F46°F63%1015.9 hPa

Wind History from HWD (wind in knots)
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Last 24hrW12W12
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1 day agoW7W9NW7W11
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2 days ago4W9W11W15W15
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W13W10W12W10W9W9W7W10W7W10SW8W7W7SW6W7W10W7

Tide / Current Tables for Newark Slough, San Francisco Bay, California
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Newark Slough
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Sun -- 12:45 AM PDT     Moonset
Sun -- 04:41 AM PDT     8.22 feet High Tide
Sun -- 05:55 AM PDT     Sunrise
Sun -- 11:14 AM PDT     Moonrise
Sun -- 12:19 PM PDT     -0.87 feet Low Tide
Sun -- 07:06 PM PDT     7.51 feet High Tide
Sun -- 08:15 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.93.75.26.77.98.27.66.44.72.81-0.3-0.8-0.60.423.85.66.97.57.26.353.8

Tide / Current Tables for Dumbarton Bridge, San Francisco Bay, California Current
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Dumbarton Bridge
Click for Map
Sun -- 12:45 AM PDT     Moonset
Sun -- 02:38 AM PDT     1.21 knots Max Flood
Sun -- 05:47 AM PDT     -0.00 knots Slack
Sun -- 05:55 AM PDT     Sunrise
Sun -- 08:57 AM PDT     -1.57 knots Max Ebb
Sun -- 11:15 AM PDT     Moonrise
Sun -- 12:29 PM PDT     0.00 knots Slack
Sun -- 03:51 PM PDT     1.75 knots Max Flood
Sun -- 08:04 PM PDT     -0.00 knots Slack
Sun -- 08:15 PM PDT     Sunset
Sun -- 09:55 PM PDT     -0.59 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.81.11.20.90.4-0.1-0.8-1.4-1.6-1.4-0.9-0.30.41.11.61.71.61.20.70-0.4-0.6-0.5

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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Other links: Northern Pacific     Contential US     Full GOES-East
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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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.