Sunday, October22, 2017 L-36.com


Marine Weather and Tides
Union City, 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 7:22AMSunset 6:22PM Saturday October 21, 2017 11:11 PM PDT (06:11 UTC) Moonrise 8:03AMMoonset 6:57PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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 Pm Pdt Sat Oct 21 2017
Tonight..W winds 5 to 15 kt.
Sun..NW winds 5 to 15 kt.
Sun night..W winds 5 to 15 kt.
Mon..NE winds 10 kt.
Mon night..N winds 10 kt.
Tue..NE winds 5 to 15 kt...becoming nw.
Wed..W winds 10 kt.
Thu..NW winds 10 kt.
PZZ500 829 Pm Pdt Sat Oct 21 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwesterly winds are gusty over the southernmost waters this evening while winds are lighter elsewhere. Northwesterly winds will gradually increase over the remaining coastal waters Sunday and Sunday night. Northwest swell periods will decrease slowly through late Sunday, however, hazardous conditions due to squared seas will exist in most offshore areas through tonight.

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 220559
afdmtr
area forecast discussion
national weather service san francisco bay area
1057 pm pdt Sat oct 21 2017

Synopsis The warming trend that got underway across our region
today will continue tomorrow. The warming trend will intensify on
Monday when offshore flow strengthens. Very warm and dry
conditions are forecast across the region on both Monday and
Tuesday. Dry weather conditions will persist through next week.

Gradual cooling if forecast during the second half of the week,
but temperatures will remain above seasonal averages.

Discussion As of 8:40 pm pdt Saturday... An upper ridge began
to strengthen over california today and onshore flow weakened. The
result was warmer temperatures today. Today's highs were
generally 5 to 10 degrees warmer compared to Friday, but still a
couple of degrees cooler than normal in most areas. Today will be
the last day of cooler than average temperatures for quite some
time.

Expect another 5 to 10 degrees of warming on Sunday as the upper
ridge continues to build along the west coast. The warming and
drying trend across our region will then intensify on Monday
after offshore flow develops on Sunday night. North to northeast
winds are expected to strengthen in our hills late Sunday night
and Monday morning. Strongest winds are forecast to be at the
higher elevations of the north bay where local gusts up to 40 mph
are likely. Locally gusty winds are also likely elsewhere,
especially in the east bay hills and higher elevations of the
santa cruz mountains. Winds will not likely be strong enough to
meet wind advisory criteria, but gusty winds and a drier airmass
will begin to raise fire weather concerns by Monday (see fire
weather discussion below for details).

High temperatures on Monday and Tuesday are forecast to be in the
80s and lower 90s across our entire region. Tuesday is expected to
be the warmest day of the week when a few mid 90s are possible.

While these warm temperatures will increase heat risks locally
into the moderate category by Tuesday, the long and relatively
cool late october nights will help to mitigate heat risks
associated with the very warm days.

The upper ridge is forecast to weaken and retreat offshore around
midweek which will result in slight cooling during the second half
of next week. In any case, expect continued dry weather and warmer
than normal temperatures through the end of the week. Longer range
models show no rain in site through the end of the month.

Aviation As of 10:57 pm pdt Saturday...VFR continues over most
of the bay area and north central coast tonight and Sunday. Dewpoint
temperatures are higher per 24 hour trends coupled with radiative
cooling under mainly clear skies tonight and early Sunday morning
may produce a patch or two of valley fog. Low clouds as well as
some patchy fog will linger along coastal sonoma county to the san
mateo coast into Sunday morning. A very strong late october ridge
develops Sunday through Tuesday. The acv-sfo pressure gradient nears
5 mb late Sunday into Monday and the wmc-sfo gradient increases to
10-13 mb Sunday night into Monday; there is potential for low level
wind shear later Sunday evening into Monday morning at koak, klvk,
ksjc, and ksfo.

Vicinity of ksfo...VFR. Light west wind tonight, w-nw wind increasing
to 15-20 knots Sunday afternoon and evening. Low level wind shear
06z-12z Monday.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR. Light and variable late this evening
possibly becoming light SE very early Sunday morning. Onshore winds
10-20 knots Sunday afternoon then mainly light e-se drainage wind
flow begins Sunday evening, possibly becoming gusty overnight in
the salinas valley.

Fire weather As of 8:30 pm pdt Saturday... Gradual warming and
drying will continue across the district into Sunday. Then,
offshore flow is forecast to strengthen on Sunday night, resulting
in much warmer and drier conditions by Monday. Locally moderate
and gusty north to northeast winds are forecast in the hills late
Sunday night and Monday morning, particularly at the higher
elevations of the north bay, but also locally in the east bay
hills and santa cruz mountains. Wind gusts of between 25 and 35
mph are likely in these locations late Sunday night and Monday
morning, with local gusts in excess of 40 mph possible across the
higher ridges of the north bay. In addition, nighttime humidity
recoveries will be poor in the hills on Sunday night. Were it not
for the recent wetting rains on Thursday night, these developments
would have resulted in critical fire weather conditions. However,
finer fuels are expected to retain enough moisture in the short
term to mitigate fire weather concerns to some extent. But fuels
will dry out quickly early in the week under these conditions.

Another round of gusty winds in the hills is expected Monday night
into Tuesday morning, especially in the north bay hills. While
winds on Monday night are not expected to be as strong as on
Sunday night, winds on Monday night may be of greater concern as
fuels will have had longer to dry by then. Will continue to
monitor fuel moisture over the next few days and issue red flag
warnings if warranted. Winds are expected to subside in all areas
by Tuesday afternoon, but very warm and dry conditions will
continue through midweek. Slight cooling is expected Wednesday and
Thursday as high pressure over california weakens.

Marine As of 10:37 pm pdt Saturday... Northwesterly winds are
gusty over the southernmost waters this evening while winds are
lighter elsewhere. Northwesterly winds will gradually increase
over the remaining coastal waters Sunday and Sunday night.

Northwest swell periods will decrease slowly through late Sunday,
however, hazardous conditions due to squared seas will exist in
most offshore areas through tonight.

Mtr watches warnings advisories
Tngt 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: dykema
aviation marine: canepa
fire weather: dykema
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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 mi42 min WNW 1.9 G 1.9 59°F 64°F1025.8 hPa
LNDC1 20 mi42 min NNE 2.9 G 4.1 60°F 1025.7 hPa
AAMC1 - 9414750 - Alameda, CA 20 mi42 min NNW 1.9 G 2.9 60°F 62°F1026.3 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 22 mi42 min N 4.1 G 5.1
OBXC1 23 mi42 min 60°F 55°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 23 mi42 min NNE 2.9 G 5.1 60°F 1025.8 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 25 mi42 min E 2.9 G 4.1 60°F 1024.8 hPa
PXSC1 25 mi42 min 61°F 56°F
FTPC1 - 9414290 - San Francisco, CA 29 mi42 min S 2.9 G 2.9 56°F 58°F1026.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 29 mi42 min NNE 2.9 G 2.9 61°F 1026.1 hPa
RCMC1 - 9414863 - Richmond, CA 31 mi42 min NNW 5.1 G 6 60°F 59°F1025.7 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 31 mi42 min WNW 7 G 8.9 61°F 1025.1 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 31 mi55 min WSW 1.9 58°F 1026 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 31 mi42 min WNW 7 G 8 59°F 62°F1026.2 hPa57°F
PCOC1 - 9415144 - Port Chicago, CA 32 mi42 min SW 8.9 G 9.9 58°F 62°F1025.8 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 34 mi42 min SW 4.1 G 5.1 59°F 1025.6 hPa
46237 - San Francisco Bar, CA (142) 36 mi42 min 56°F7 ft
SFXC1 - San Francisco Bay Reserve, CA 41 mi87 min W 5.1 55°F 1024 hPa51°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 46 mi82 min NNW 7.8 G 9.7 56°F 56°F8 ft1025.8 hPa (+0.5)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 49 mi82 min NW 9.7 G 12 59°F 60°F10 ft1025.5 hPa (+0.7)

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 mi18 minSE 410.00 miFair56°F48°F75%1027 hPa
Palo Alto Airport, CA10 mi2.4 hrsNW 810.00 miClear57°F51°F82%1025.7 hPa
Mountain View, Moffett Field, CA12 mi16 minSSW 310.00 miFair58°F52°F81%1026.7 hPa
Livermore, Livermore Municipal Airport, CA12 mi19 minNE 410.00 miFair54°F48°F80%1025.7 hPa
San Carlos Airport, CA14 mi17 minS 410.00 miFair57°F51°F82%1026.4 hPa
Oakland, Metro Oakland International Airport, CA14 mi19 minESE 510.00 miFair55°F53°F93%1026.1 hPa
San Jose, San Jose International Airport, CA16 mi19 minN 010.00 miA Few Clouds59°F53°F81%1026.4 hPa
San Francisco, San Francisco International Airport, CA19 mi16 minW 510.00 miFair57°F52°F83%1025.9 hPa
San Jose / Reid / Hillv, CA20 mi85 minN 08.00 miClear57°F51°F82%1027.8 hPa

Wind History from HWD (wind in knots)
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Last 24hrCalmSE3E3E5NE5NE4NE5NE3E5E3CalmCalmW7W7W12W11W10W9W10W7NW4NW3E3SE4
1 day agoW20
G28
NW12CalmW9N6NE4CalmS4CalmS5S8W7W9W10W13W13
G19
W14W13W12W10W9NW10NW5NW3
2 days agoW7SW5NW5W8W6W3SW4SW5SW3W3W4W6W6W5W8NW7NW7W6W5SW5S8S6S9SW9

Tide / Current Tables for Newark Slough, San Francisco Bay, California
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Newark Slough
Click for Map
Sun -- 03:27 AM PDT     7.38 feet High Tide
Sun -- 07:23 AM PDT     Sunrise
Sun -- 09:17 AM PDT     2.38 feet Low Tide
Sun -- 09:59 AM PDT     Moonrise
Sun -- 02:38 PM PDT     8.23 feet High Tide
Sun -- 06:21 PM PDT     Sunset
Sun -- 08:34 PM PDT     Moonset
Sun -- 09:57 PM PDT     0.17 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.256.47.37.36.55.342.92.42.63.75.36.988.27.66.54.831.50.50.20.7

Tide / Current Tables for Dumbarton Bridge, San Francisco Bay, California Current
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Dumbarton Bridge
Click for Map
Sun -- 12:41 AM PDT     1.71 knots Max Flood
Sun -- 04:34 AM PDT     -0.00 knots Slack
Sun -- 06:37 AM PDT     -0.80 knots Max Ebb
Sun -- 07:23 AM PDT     Sunrise
Sun -- 09:26 AM PDT     0.00 knots Slack
Sun -- 09:59 AM PDT     Moonrise
Sun -- 12:33 PM PDT     1.34 knots Max Flood
Sun -- 03:54 PM PDT     -0.00 knots Slack
Sun -- 06:21 PM PDT     Sunset
Sun -- 06:45 PM PDT     -1.42 knots Max Ebb
Sun -- 08:34 PM PDT     Moonset
Sun -- 10:10 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.61.71.510.4-0.3-0.7-0.8-0.6-0.20.30.91.31.310.6-0.1-0.8-1.3-1.4-1.2-0.7-0.10.6

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 (2,6,7,8)
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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.