Saturday, April21, 2018 L-36.com


Marine Weather and Tides
Alameda, 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 6:22AMSunset 7:52PM Saturday April 21, 2018 4:07 PM PDT (23:07 UTC) Moonrise 10:14AMMoonset 12:03AM Illumination 41% Phase: Waxing Crescent; Moon at 7 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- 224 Pm Pdt Sat Apr 21 2018
Tonight..SW winds 5 to 15 kt.
Sun..SW winds 5 to 15 kt.
Sun night..SW winds 5 to 15 kt.
Mon..W winds 5 kt.
Mon night..SW winds 5 kt.
Tue..SW winds 5 kt.
Wed..SW winds 10 kt.
Thu..SW winds 10 kt.
PZZ500 224 Pm Pdt Sat Apr 21 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure over the eastern pacific will maintain brisk northwest winds across the coastal waters through the weekend. Steep wind waves and fresh swell will result in choppy seas over the weekend and possibly into early next week.

7 Day Forecast for Marine Location Near Alameda city, CA
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location: 37.78, -122.28     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 211953
afdmtr
area forecast discussion
national weather service san francisco bay area
1253 pm pdt Sat apr 21 2018

Synopsis A warming trend and dry weather are forecast through
the weekend. Cooler temperatures are expected next week as a low
pressure system develops over the eastern pacific.

Discussion As of 12:50 pm pdt Saturday... Similar to Friday,
morning low clouds dissipated back to the coast, but lingered
around monterey bay. Clouds eventually clear by early afternoon
leading to abundant sunshine around the bay area. Increased
sunshine and warming airmass over the region yield warmer temps
this afternoon. The latest 24 hour trend has many locations two
to five degrees warmer than Friday afternoon.

Ridge of high pressure will remain over the region as a weak upper
level trough swings through the pacnw on Sunday. That being said,
morning low clouds will once again be possible along the coast and
locally inland, especially monterey salinas valleys. Temperatures
will be above normal again on Sunday with highs in the 60s 70s
coast and 70s 80s inland.

No major change in the sensible weather through the middle of next
week. Night and morning low clouds will continue with afternoon
sunshine. There will likely be a slight downward trend in
temperatures as high pressure weakens slightly.

Medium range models still lead to an uncertain lower confidence
forecast late next week all show a low pressure system coming
toward the west coast, but associated varies greatly. The gfs
gives about a 10-20% chance of 0.01" for sfo where the ECMWF takes
all precip north of the bay area. Therefore, the forecast remains
dry for now, but temps cool regardless.

Aviation As of 10:36 am pdt Saturday for 18z tafs... Mainly
clear skies prevail across the region this morning with the
exception of a few high clouds passing overhead. Low clouds are
forecast to return over monterey bay area terminals after midnight
tonight. Onshore winds will increase this afternoon to around 10
to 20 kt.

Vicinity of ksfo...VFR conditions will prevail through the
forecast period. Light winds will increase this afternoon to
around 20 kt across ksfo.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR conditions will prevail through late
tonight with ifr CIGS returning after midnight. Light winds will
between 5 to 10 kt will prevail.

Marine As of 9:00 am pdt Saturday... Continued breezy northwest
winds are expected over the coastal waters this weekend as high
pressure remains over the eastern pacific. Steep wind waves and
fresh swell will result in choppy seas over the weekend and
possibly into early next week.

Mtr watches warnings advisories
Tngt Sca... Pt reyes to pigeon pt 0-10 nm until 3 am
sca... Pigeon pt to pt pinos 0-10 nm until 3 am
sca... Pt arena to pt reyes 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
public forecast: mm sims
aviation: cw
marine: rowe cw
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LNDC1 1 mi49 min WSW 7 G 8 69°F 1018.2 hPa
AAMC1 - 9414750 - Alameda, CA 1 mi55 min W 7 G 8 67°F 64°F1018.5 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 3 mi49 min W 11 G 12
OBXC1 4 mi49 min 65°F 51°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 4 mi49 min WNW 8.9 G 9.9 63°F 1018.3 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 6 mi49 min W 8.9 G 13 68°F 1017.6 hPa
PXSC1 6 mi49 min 70°F 51°F
FTPC1 - 9414290 - San Francisco, CA 10 mi55 min WSW 13 G 17 58°F 57°F1019 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 10 mi49 min SSW 8 G 11 62°F 1018.7 hPa
RCMC1 - 9414863 - Richmond, CA 12 mi55 min SSE 5.1 G 7 65°F 58°F1018 hPa
46237 - San Francisco Bar, CA (142) 19 mi67 min 56°F6 ft
MZXC1 - 9415102 - Martinez-Amorco CA 19 mi49 min NNE 1.9 G 2.9 73°F 61°F1017.8 hPa50°F
RTYC1 - 9414523 - Redwood City, CA 19 mi49 min N 7 G 8.9 73°F 64°F1018.4 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 19 mi49 min W 2.9 G 5.1 70°F 1017.7 hPa
PCOC1 - 9415144 - Port Chicago, CA 23 mi49 min NNE 1.9 G 1.9 73°F 62°F1017.6 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 28 mi55 min NNE 1 G 1.9 74°F 1017.7 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 30 mi77 min NW 16 G 19 52°F 53°F8 ft1019.6 hPa (-1.4)
SFXC1 - San Francisco Bay Reserve, CA 32 mi82 min SSW 2.9 79°F 1018 hPa56°F
PRYC1 - 9415020 - Point Reyes, CA 40 mi49 min WNW 18 G 23 53°F1019.2 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 43 mi77 min NNW 19 G 23 54°F 54°F8 ft1019.1 hPa (-1.4)

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
Oakland, Metro Oakland International Airport, CA6 mi74 minW 68.00 miA Few Clouds70°F55°F59%1018.6 hPa
Hayward, Hayward Air Terminal, CA12 mi73 minW 910.00 miFair75°F50°F42%1019.1 hPa
San Francisco, San Francisco International Airport, CA12 mi71 minWNW 1310.00 miA Few Clouds73°F48°F43%1018.3 hPa
San Carlos Airport, CA17 mi80 minNNE 510.00 miClear77°F48°F36%1018.3 hPa
Concord, Buchanan Field, CA18 mi74 minVar 310.00 miFair81°F53°F38%1016.7 hPa
Half Moon Bay Airport, CA22 mi67 minNW 118.00 miFair61°F50°F68%1019.3 hPa

Wind History from OAK (wind in knots)
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Last 24hrW13W9W12W11NW3W7NE3NE5SW12S3SW3S4NE4NW3CalmCalmSE3SW4W6W6W7W6W6NW10
1 day agoW15W14W10W9W8SW6W3CalmCalmS3CalmNE3CalmCalmCalmSE4CalmS6SW4SW6W8W14W14W15
2 days agoW8W12W10W10W11NW8NW9NW9NW7NW6N3E3NE3NE3NE4E3SE4S4SW5SW8W13W14W14W12

Tide / Current Tables for Oakland Inner Harbor, San Francisco Bay, California
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Oakland Inner Harbor
Click for Map
Sat -- 01:02 AM PDT     Moonset
Sat -- 04:11 AM PDT     6.27 feet High Tide
Sat -- 06:25 AM PDT     Sunrise
Sat -- 11:10 AM PDT     -0.58 feet Low Tide
Sat -- 11:14 AM PDT     Moonrise
Sat -- 06:41 PM PDT     5.00 feet High Tide
Sat -- 07:50 PM PDT     Sunset
Sat -- 11:29 PM PDT     2.74 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.34.25.15.96.36.15.342.40.9-0.2-0.6-0.40.31.22.33.44.34.954.63.93.22.8

Tide / Current Tables for Oakland Inner Harbor Reach, 33 ft. below datum Current
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Oakland Inner Harbor Reach
Click for MapFlood direction 82 true
Ebb direction 255 true

Sat -- 01:02 AM PDT     Moonset
Sat -- 02:03 AM PDT     0.20 knots Max Flood
Sat -- 04:18 AM PDT     -0.00 knots Slack
Sat -- 06:25 AM PDT     Sunrise
Sat -- 07:24 AM PDT     -0.43 knots Max Ebb
Sat -- 10:27 AM PDT     0.01 knots Slack
Sat -- 11:14 AM PDT     Moonrise
Sat -- 03:24 PM PDT     0.32 knots Max Flood
Sat -- 06:37 PM PDT     -0.01 knots Slack
Sat -- 07:50 PM PDT     Sunset
Sat -- 08:14 PM PDT     -0.19 knots Max Ebb
Sat -- 10:43 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.20.20.20-0.1-0.3-0.4-0.4-0.3-0.10.10.20.20.30.30.30.20.1-0.1-0.2-0.2-0.10

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 (19,4,5,8)
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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.