Friday, March24, 2017 L-36.com


Marine Weather and Tides
Union City, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:02AMSunset 7:25PM Friday March 24, 2017 6:54 PM PDT (01:54 UTC) Moonrise 4:04AMMoonset 3:00PM Illumination 7% Phase: Waning Crescent; Moon at 27 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- 213 Pm Pdt Fri Mar 24 2017
Tonight..W winds 5 to 15 kt. Chance of showers in the evening, then slight chance of showers after midnight.
Sat..N winds 5 kt...becoming northwest 5 to 15 kt in the afternoon.
Sat night..W winds 5 to 15 kt.
Sun..S winds 10 kt. Chance of showers.
Sun night..W winds 5 to 15 kt. Showers likely.
Mon..NW winds 15 to 25 kt. Slight chance of showers.
Tue..NW winds 5 to 15 kt.
Wed..W winds 10 kt.
PZZ500 213 Pm Pdt Fri Mar 24 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will return to northwest and continue to ease this evening in the wake of the frontal boundary that moved through the coastal waters earlier today. Southerly winds are forecast to return Sunday as the next system approaches. Fresh short period swells will make for choppy conditions over the coastal waters through the weekend.

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 242037
afdmtr
area forecast discussion
national weather service san francisco bay area
137 pm pdt Fri mar 24 2017

Synopsis Showers can be expected into the evening behind a
departing cold front. A break in the rain is expected Saturday
with showers anticipated to return starting late on Sunday as a
low pressure system moves through.

Discussion As of 1:40 pm pdt Friday... Widespread rainfall
across our CWA today as a moderate cold front quickly advances
through our region. So far rainfall reports have generally been a
bit lower than forecast in most locations which has meant fewer
hydro reports than expected. Even when the main band of moderate
rainfall went through the bay area late a couple of hours ago,
reports of roadway flooding or hydro issues were less than what we
typically would typically see. One possible reason is as expected
the front went through at an ideal time between the morning rush
and evening commute -- typically when traffic is quite a bit less.

Regardless, still decent values that will add to our impressive
totals for the winter of 2016/17.

Winds also increased as the front approached, however outside of a
few isolated spots, speeds have been lower than advisory criteria.

Latest analysis suggests that the peak winds have already
occurred, so the wind advisory was cancelled for all locations.

Post-frontal scattered showers can be expected into tonight
especially for far southern portions. However, amounts will
generally be very light -- less than 1/10" for urban locations
with locally up to 1/4" for higher elevation spots.

Dry weather will return for Saturday through most of Sunday as a
weak ridge of high pressure builds back to the coast. Highs will
mostly be in the upper 50s to mid 60s on Saturday with a few
degrees of cooling on Sunday as the ridge flattens out. At the
same time a minor system will drop down from the north and
quickly move through our region. Scattered showers can be expected
with the majority of the rain over the north bay. In fact, many
locations south of the bay area will likely see a tenth or less.

Light showers will mostly come to an end by Monday morning.

Continues to look like next Monday through the following weekend
will be fairly quiet as a ridge of high pressure builds to the
coast and is then replaced by a dry northwesterly flow. Models
show possibly two shots at getting light scattered showers,
however any associated precipitation should be very light.

Temperatures will range from near normal to a bit above normal.

Aviation As of 10:55 am pdt Friday... For 18z tafs. A heavy band
of showers is moving across the bay area at this hour resulting in
decreased vsbys and ifr to MVFR CIGS to area terminals. As the
band of rain slides south terminals currently ahead of the band
will begin to see lowered vsbys and cigs. Improving conditions
expected behind this band of showers later this afternoon and
evening.

Moderate southeasterly winds with locally stronger gusts will
continue across the forecast area. Wind gusts could reach 25-30 kt
at times through about 00z, as a cold front passes.

Moderately high confidence.

Vicinity of ksfo... MVFR CIGS with periods of moderate rain and
gusty winds expected through 00z. Moderate southeasterly winds
with gusts around 25 kt or more expected through the afternoon
and early evening.

Sfo bridge approach... Same as ksfo.

Monterey bay terminals...VFR CIGS prevail at this hour with cigs
expected to lower to MVFR around 20z with the arrival of the rain.

Southeast winds will turn increasingly to the south by the
afternoon, with gusts around 20 kt possible.

Marine As of 10:49 am pdt Friday... Occasional gale force gusts
are possible through the day today as a storm system impacts the
region with strong southerly winds and rain. Seas will be rough
with the frontal passage... But should begin to decrease by this
evening. Expect northwest winds to return by Saturday morning
before briefly becoming southerly on Sunday as another weak
system moves over the waters.

Mtr watches/warnings/advisories
Tngt Sca... Mry bay until 9 pm
sca... Pigeon pt to pt pinos 0-10 nm until 9 pm
sca... Pt pinos to pt piedras blancas 0-10 nm until 9 pm
sca... Sf bay until 5 pm
sca... Pigeon pt to pt piedras blancas 10-60 nm until 5 pm
sca... Pt arena to pt reyes 0-10 nm until 3 pm
sca... Pt reyes to pigeon pt 0-10 nm until 3 pm
public forecast: bell
aviation: cw
marine: cw
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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 ESE 4.1 G 5.1 56°F 59°F1020.8 hPa (+0.0)
LNDC1 20 mi66 min SSE 4.1 G 5.1 56°F 1021.2 hPa
AAMC1 - 9414750 - Alameda, CA 20 mi54 min SE 6 G 7 56°F 59°F1021.6 hPa (+0.0)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 22 mi54 min SE 6 G 8
OBXC1 23 mi54 min 55°F 55°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 23 mi66 min SE 6 G 8 55°F 1021.3 hPa
PXSC1 25 mi54 min 55°F 53°F
FTPC1 - 9414290 - San Francisco, CA 29 mi54 min WSW 4.1 G 6 54°F 57°F1021.7 hPa (+0.0)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 29 mi54 min W 7 G 8.9 56°F 1021.4 hPa (+0.0)
RCMC1 - 9414863 - Richmond, CA 31 mi54 min S 4.1 G 6 55°F 57°F1021 hPa (-0.0)
UPBC1 31 mi54 min W 2.9 G 5.1
MZXC1 - 9415102 - Martinez-Amorco CA 31 mi54 min SW 4.1 G 5.1 57°F 58°F1021.4 hPa (-0.5)55°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 31 mi54 min SE 8.9 G 11 55°F 1021.1 hPa (-0.3)
PCOC1 - 9415144 - Port Chicago, CA 32 mi54 min SSW 2.9 G 5.1 57°F 58°F1021.1 hPa (-0.4)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 34 mi54 min SW 7 G 8.9 56°F 1021 hPa (-0.0)
46237 - San Francisco Bar, CA (142) 36 mi54 min 56°F9 ft
SFXC1 - San Francisco Bay Reserve, CA 41 mi69 min S 7 56°F 1021 hPa54°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 46 mi64 min SSE 1.9 G 3.9 53°F 55°F8 ft1021.3 hPa (+0.0)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 49 mi64 min E 1.9 G 3.9 55°F 55°F9 ft1020.8 hPa (+0.0)

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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W13
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G15
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hayward, Hayward Air Terminal, CA8 mi60 minS 57.00 miOvercast57°F53°F87%1022.2 hPa
Palo Alto Airport, CA10 mi67 minESE 57.00 miOvercast55°F55°F100%1021.3 hPa
Mountain View, Moffett Field, CA12 mi2 hrsSE 41.50 miLight Rain Fog/Mist54°F54°F100%1021.8 hPa
Livermore, Livermore Municipal Airport, CA12 mi61 minSSW 68.00 miOvercast55°F52°F90%1021 hPa
San Carlos Airport, CA14 mi67 minVar 310.00 miOvercast55°F53°F94%1021.7 hPa
Oakland, Metro Oakland International Airport, CA14 mi61 minSSE 610.00 miOvercast57°F55°F96%1021.4 hPa
San Jose, San Jose International Airport, CA16 mi61 minESE 510.00 miLight Rain56°F52°F87%1021.3 hPa
San Francisco, San Francisco International Airport, CA19 mi58 minNE 310.00 miOvercast57°F52°F83%1021.2 hPa
San Jose / Reid / Hillv, CA20 mi67 minSE 88.00 miOvercast57°F53°F88%1022 hPa

Wind History from HWD (wind in knots)
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Last 24hrW7NW7W4CalmCalmSE3SE6SE5S7SE6SE5SE9SE9SE11SE14S10S13
G22
S14
G23
SE14SE15
G19
S11S4SE5S5
1 day ago--NW15
G21
W15NW9NW7CalmN6NW7N6N4E5E4E4E4CalmCalmW7NW7NW6NW10W7NW10NW12W11
2 days agoSW11S10SW9S9S6SW3S10S9SW3SE4SE9S3SE8NW7NW8NW11W10W9W8
G16
W13W15W16W16W16
G21

Tide / Current Tables for Newark Slough, San Francisco Bay, California
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Newark Slough
Click for Map
Fri -- 05:04 AM PDT     Moonrise
Fri -- 05:34 AM PDT     2.38 feet Low Tide
Fri -- 07:05 AM PDT     Sunrise
Fri -- 10:41 AM PDT     7.94 feet High Tide
Fri -- 04:00 PM PDT     Moonset
Fri -- 05:56 PM PDT     0.21 feet Low Tide
Fri -- 07:24 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.26.65.54.23.12.52.53.34.86.47.67.97.46.24.62.91.50.50.20.823.75.56.9

Tide / Current Tables for Dumbarton Bridge, San Francisco Bay, California Current
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Dumbarton Bridge
Click for Map
Fri -- 12:27 AM PDT     -0.00 knots Slack
Fri -- 02:37 AM PDT     -0.75 knots Max Ebb
Fri -- 05:04 AM PDT     Moonrise
Fri -- 05:27 AM PDT     0.00 knots Slack
Fri -- 07:05 AM PDT     Sunrise
Fri -- 08:33 AM PDT     1.36 knots Max Flood
Fri -- 11:56 AM PDT     -0.00 knots Slack
Fri -- 02:44 PM PDT     -1.40 knots Max Ebb
Fri -- 04:00 PM PDT     Moonset
Fri -- 06:06 PM PDT     0.00 knots Slack
Fri -- 07:24 PM PDT     Sunset
Fri -- 09:19 PM PDT     1.72 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.3-0.3-0.7-0.7-0.6-0.20.30.91.31.31.10.6-0-0.8-1.3-1.4-1.2-0.7-0.10.71.41.71.71.3

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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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.