Friday, July28, 2017 L-36.com


Marine Weather and Tides
Alameda, 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 6:08AMSunset 8:22PM Friday July 28, 2017 6:03 AM PDT (13:03 UTC) Moonrise 10:49AMMoonset 10:51PM Illumination 24% 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
    EDIT      (on/off)   Help
PZZ530 San Pablo Bay Suisun Bay The West Delta And San Francisco Bay North Of The Bay Bridge- 238 Am Pdt Fri Jul 28 2017
Today..SW winds 10 to 20 kt. Patchy fog in the morning.
Tonight..S winds 10 to 20 kt. Patchy fog after midnight.
Sat..SW winds 10 to 20 kt. Patchy fog in the morning.
Sat night..SW winds 10 to 20 kt. Patchy fog after midnight.
Sun..SW winds 10 to 20 kt. Patchy fog in the morning.
Mon..SW winds 5 to 15 kt.
Tue..SW winds 5 kt...increasing to 5 to 15 kt.
PZZ500 238 Am Pdt Fri Jul 28 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate to locally strong northwesterly winds will continue through the end of the week across the northern waters. Gusty winds will produce steep wind waves and fresh swell. Two tropical systems in the pacific will produce a long period southerly swell to arrive over the weekend. Interaction between the northwesterly wind waves and southerly swell will create choppy conditions across the waters.

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


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 281156
afdmtr
area forecast discussion
national weather service san francisco bay area
456 am pdt Fri jul 28 2017

Synopsis Slightly cooler temperatures are forecast for today
and Saturday as a weak upper trough approaches the northern
california coast. Even so, most inland areas will remain warm. A
gradual warming trend is then forecast from Sunday through much of
next week as a high pressure ridge strengthens over the western
united states. Thus, expect a prolonged period of very warm
temperatures inland. Mild conditions will persist near the coast.

Discussion As of 3:15 am pdt Friday... Satellite imagery shows
less inland low cloud coverage compared to 24 hours ago although
stratus is extending well down the salinas valley at this time.

The marine layer depth is more shallow - around 1000 feet deep per
the fort ord profiler, and surface pressure gradients are about
the same onshore with 2.3 mb from sfo to sac, but much stronger
from north-to-south with 5.4 mb from acv to sfo. This type of
gradient pattern lends itself to more clouds pushing into the
monterey bay and salinas valley and fewer clouds working into the
san francisco bay.

Meanwhile, a weak upper level trough is forecast to approach the
coast today which is expected to deepen the marine layer a little
today and tomorrow. Inland locations are expected to see similar
warmth to yesterday, with plenty of upper 80s and 90s for highs
today. Near-coastal areas could see a couple of degrees of
cooling depending on the strength of the sea breeze this
afternoon. Saturday is expected to be slightly cooler as the weak
trough moves through.

A strong ridge of high pressure currently centered over the rocky
mountain states will build and gradually shift to the west
beginning on Sunday and through the coming week. This will bring
warmer temperatures to the district through the remainder of the
forecast period. The ridge is progged to strengthen during the
latter part of next week for very warm to hot temperatures
across inland areas.

Aviation As of 4:56 am pdt Friday... For 12z tafs. Low clouds
have filled in along the coast this morning. A shallow marine
layer around 800 ft will keep low clouds confined to the coast and
terminals mainly cloud free with the exception of monterey bay
terminals. Light westerly flow will ramp up this afternoon.

Vicinity of ksfo...VFR conditions will prevail. Light to moderate
westerly winds expected to ramp up to 15 to 20 kt this afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Lifr CIGS expected through the morning
hours with low clouds expected to scatter out around 16z. Light
winds.

Marine As of 2:38 am pdt Friday... Moderate to locally strong
northwesterly winds will continue through the end of the week
across the northern waters. Gusty winds will produce steep wind
waves and fresh swell. Two tropical systems in the pacific will
produce a long period southerly swell to arrive over the weekend.

Interaction between the northwesterly wind waves and southerly
swell will create choppy conditions across the waters.

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

Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AAMC1 - 9414750 - Alameda, CA 1 mi52 min W 2.9 G 4.1 58°F 68°F1012.9 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 3 mi58 min WNW 5.1 G 6
OKXC1 - 9414776 - Oakland (Berth 34), CA 4 mi52 min W 6 G 7 58°F 1012.4 hPa
OBXC1 4 mi52 min 58°F 55°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 6 mi52 min W 6 G 8 55°F 1011.4 hPa
PXSC1 6 mi52 min 56°F 55°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 10 mi52 min SSW 13 G 17 57°F 1012.3 hPa
FTPC1 - 9414290 - San Francisco, CA 10 mi52 min SW 5.1 G 8.9 54°F 59°F1012.8 hPa
RCMC1 - 9414863 - Richmond, CA 12 mi52 min S 5.1 G 8.9 58°F 62°F1012 hPa
46237 - San Francisco Bar, CA (142) 19 mi64 min 58°F6 ft
RTYC1 - 9414523 - Redwood City, CA 19 mi52 min NNW 4.1 G 5.1 60°F 74°F1012 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 19 mi52 min WNW 11 G 14 60°F 69°F1011.6 hPa59°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 19 mi52 min W 9.9 G 14 59°F 1011.3 hPa
PCOC1 - 9415144 - Port Chicago, CA 23 mi52 min W 17 G 20 61°F 70°F1010.9 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 28 mi52 min NW 13 G 17 66°F 1009.9 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 30 mi74 min NW 16 G 19 53°F 54°F7 ft1012.5 hPa (-0.4)
SFXC1 - San Francisco Bay Reserve, CA 32 mi79 min W 6 60°F 1010 hPa56°F
PRYC1 - 9415020 - Point Reyes, CA 40 mi52 min NW 19 G 22 57°F 57°F1012.4 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 43 mi74 min NW 16 G 18 55°F 56°F8 ft1012.7 hPa (-0.4)

Wind History for Alameda, CA
(wind in knots)    EDIT      (on/off)   Help
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
Last
24hr
W3
W3
NW2
S1
G4
W3
SW1
W3
W5
W4
W4
G7
W6
W10
G13
W7
G11
W6
G9
W4
G7
W4
W4
G7
W7
W4
W3
G6
W5
G9
W5
G8
W5
G8
W4
1 day
ago
W5
W3
G8
W6
W4
W4
W5
W5
W5
W4
W7
G10
W9
W6
G9
W8
G11
W6
G11
W7
G10
W8
G11
W6
G9
W4
W5
W4
NW1
W1
W3
W2
2 days
ago
NW3
NW3
N2
W4
W2
NW4
G9
N5
W7
G12
W6
G11
W8
G13
W8
G14
W7
G12
W8
G11
W9
G14
W8
G11
W9
G12
W7
G11
W6
G10
W5
W4
W5
W6
G9
W5
G8
W6

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oakland, Metro Oakland International Airport, CA6 mi71 minWNW 79.00 miFair57°F55°F96%1012.3 hPa
Hayward, Hayward Air Terminal, CA12 mi70 minN 410.00 miFair59°F52°F78%1013.2 hPa
San Francisco, San Francisco International Airport, CA12 mi68 minWNW 1210.00 miA Few Clouds58°F53°F84%1012.1 hPa
San Carlos Airport, CA17 mi74 minN 010.00 miFair59°F53°F82%1012.5 hPa
Concord, Buchanan Field, CA18 mi71 minNNW 310.00 miFair62°F57°F84%1009.8 hPa
Half Moon Bay Airport, CA22 mi69 minN 07.00 miOvercast54°F53°F100%1012.5 hPa

Wind History from OAK (wind in knots)
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
Last 24hrCalmNE3CalmW5W8NW6W8W10W12NW14NW15W11W13W11W11W8W7W10NW6NW6NW7CalmNW7W11
1 day agoW5NW7NW7NW6NW8W6W8W10W13W14NW13NW14W13NW9W10NW7NW6NW4NW5NW6CalmCalmN3Calm
2 days agoN3N3NW45W7NW9NW14NW12W16W15NW11NW13NW12NW9NW9NW7NW9N6N5NW5NW6NW8W8W9

Tide / Current Tables for Oakland Inner Harbor, San Francisco Bay, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Oakland Inner Harbor
Click for Map
Fri -- 04:02 AM PDT     5.64 feet High Tide
Fri -- 06:09 AM PDT     Sunrise
Fri -- 10:20 AM PDT     0.60 feet Low Tide
Fri -- 11:49 AM PDT     Moonrise
Fri -- 05:14 PM PDT     6.29 feet High Tide
Fri -- 08:21 PM PDT     Sunset
Fri -- 11:19 PM PDT     1.78 feet Low Tide
Fri -- 11:51 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.73.64.65.35.65.44.63.42.11.10.60.71.42.43.64.95.86.36.15.44.33.12.21.8

Tide / Current Tables for Oakland Inner Harbor Reach, 33 ft. below datum Current
   EDIT      (on/off)   Help   One Week of Data
Oakland Inner Harbor Reach
Click for MapFlood direction 82 true
Ebb direction 255 true

Fri -- 01:49 AM PDT     0.27 knots Max Flood
Fri -- 04:22 AM PDT     -0.00 knots Slack
Fri -- 06:09 AM PDT     Sunrise
Fri -- 06:45 AM PDT     -0.36 knots Max Ebb
Fri -- 09:33 AM PDT     0.01 knots Slack
Fri -- 11:49 AM PDT     Moonrise
Fri -- 02:22 PM PDT     0.32 knots Max Flood
Fri -- 05:12 PM PDT     -0.00 knots Slack
Fri -- 07:22 PM PDT     -0.31 knots Max Ebb
Fri -- 08:21 PM PDT     Sunset
Fri -- 10:20 PM PDT     0.00 knots Slack
Fri -- 11:51 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.30.30.20.1-0.1-0.3-0.4-0.3-0.100.10.20.30.30.30.20-0.2-0.3-0.3-0.2-0.10.1

Weather Map and Satellite Images
       (on/off)   Help
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 (9,2,3,4)
      (on/off)   Help

Ground Weather Radar Station San Francisco Bay Area, CA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.