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Marine Weather and Tides
Version 3.4 |
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome. 10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name. |
| Sunrise 6:18AM | Sunset 7:54PM | Thursday April 25, 2019 10:39 PM PDT (05:39 UTC) | Moonrise 12:25AM | Moonset 10:19AM | Illumination 58% |  |
PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 930 Pm Pdt Thu Apr 25 2019
Tonight..SW winds 10 to 20 kt. Gusts up to 25 kt this evening.
Fri..SW winds 5 to 15 kt...increasing to 10 to 20 kt in the afternoon.
Fri night..SW winds 10 to 20 kt...with gusts up to 25 kt in the evening.
Sat..SW winds 5 to 15 kt with afternoon gusts up to 25 kt.
Sat night..SW winds 5 to 15 kt...evening gusts to 20 kt.
Sun..SW winds 5 to 15 kt.
Sun night..SW winds 5 to 15 kt.
Mon..SW winds up to 10 kt.
Tue..W winds 5 to 10 kt.
Tonight..SW winds 10 to 20 kt. Gusts up to 25 kt this evening.
Fri..SW winds 5 to 15 kt...increasing to 10 to 20 kt in the afternoon.
Fri night..SW winds 10 to 20 kt...with gusts up to 25 kt in the evening.
Sat..SW winds 5 to 15 kt with afternoon gusts up to 25 kt.
Sat night..SW winds 5 to 15 kt...evening gusts to 20 kt.
Sun..SW winds 5 to 15 kt.
Sun night..SW winds 5 to 15 kt.
Mon..SW winds up to 10 kt.
Tue..W winds 5 to 10 kt.
PZZ500 930 Pm Pdt Thu Apr 25 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure off the pacific northwest will keep gusty northwest winds going over the northern waters through tomorrow night with generally light to moderate northerly winds expected elsewhere. High pressure off the pacific northwest will merge with a high spanning alaska to the northwest territories over the weekend and early next week, the strongest winds will become confined to the northern outer coastal california waters. Light to moderate northwest swell will persist through the forecast period.
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure off the pacific northwest will keep gusty northwest winds going over the northern waters through tomorrow night with generally light to moderate northerly winds expected elsewhere. High pressure off the pacific northwest will merge with a high spanning alaska to the northwest territories over the weekend and early next week, the strongest winds will become confined to the northern outer coastal california waters. Light to moderate northwest swell will persist through the forecast period.
7 Day Forecast for Marine Location Near Oakland, CA
Hourly EDIT Helplocation: 37.78, -122.25 debug
Area Discussion for - San Francisco/Monterey Bay Area, CA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus66 kmtr 260455 afdmtr area forecast discussion national weather service san francisco bay area 955 pm pdt Thu apr 25 2019 Synopsis Areas of night and morning low clouds will continue into the upcoming weekend. Little change is expected in temperatures on Friday, but gradual cooling will occur inland over the weekend and into early next week. A weak disturbance passing through southern california will bring clouds and possibly isolated showers south of monterey this late this weekend. Otherwise, dry weather is forecast through the the weekend and well into next week. Discussion As of 8:45 pm pdt Thursday... Development of a marine layer along the coast last night, coupled with increased onshore flow today, resulted in widespread cooling across our region today. Some locations were as much as 15 degrees cooler today compared to Wednesday. An upper ridge remains centered over california this evening. Goes west water vapor satellite imagery shows a weak shortwave trough off the coast of the pacific northwest, moving to the east. This disturbance is forecast to move inland well to our north late tonight and weaken the upper ridge slightly. However, very little airmass cooling is forecast and onshore flow is expected to weaken slightly on Friday as surface high pressure builds more strongly to our north. So the net result will be little change in temperatures from today, and some locations could even warm a bit. A marine layer, with a depth of about 1500 feet, is expected to persist in coastal areas, although the latest local WRF model indicates drier air making its way into the low levels by tomorrow. So, we could see some clearing of low clouds in coastal areas by afternoon. Onshore flow is projected to strengthen slightly by Saturday which should result in modest cooling. We may also see an increase in high clouds on Saturday out ahead of a weak upper low that will be approaching the southern california coast. But otherwise no significant changes are anticipated through Saturday. Cooling will likely become more pronounced on Sunday as the upper low draws closer to southern california and the ridge weakens over our area. The low is forecast to move inland near san diego by late Sunday night or Monday morning and it may be close enough to generate isolated showers across areas south of monterey on Sunday night and Monday. By early next week an upper trough is forecast to deepen from western canada south across the pacific northwest and the northern rockies. This trough will be dry and its main impact will be to bring a cooler airmass into california, allowing the cooling trend to continue across our area, especially inland, during the first half of next week. Temperatures are forecast to cool by as much as 15 degrees from Sunday to Tuesday. But even with this |
projected cooling, temperatures are only forecast to decrease to levels near, or slightly below, seasonal averages. Aviation As of 9:55 pm pdt Thursday... The marine layer depth varies from 1,000 to 1,500 feet per recent profiler data. Some amplification of the 500 mb height ridge is anticipated Friday, but in response the 18z 00z NAM generally forecasts less than 2 celsius temperature changes at 925 mb and 850 mb levels tonight into Friday which supports a mainly persistence forecast; i.E. Little change in the marine layer depth is anticipated through the period. Onshore winds will usher stratus and fog inland tonight and Friday morning, but a compressed marine layer should limit areal coverage over the bay area. At the present time ifr-lifr ceilings have reached inland into sonoma valley, east through the golden gate over the san francisco bay to oakland berkeley, and into the salinas valley. Elsewhere METAR observations indicateVFR. On Friday coastal ifr in the morning will mix out through typical diurnal warming and mixing, mainlyVFR is forecast inland. Patchy ifr may linger along the immediate coast from late morning through afternoon. The NAM forecasts a slight increase in acv-sfo pressure gradient Friday. Low confidence if how marine stratus fog returns inland Friday night into Saturday, inland arrival could be delayed somewhat if the northerly pressure gradient strengthens. Sfo-sac gradient should be about the same as it is this afternoon, approx 3 mb. Vicinity of ksfo...VFR, west wind has diminished to near 10 knots. Tempo MVFR ceiling 12z-16z Friday.VFR with gusty west to northwest wind redeveloping Friday afternoon and evening. Sfo bridge approach... Same as ksfo. Monterey bay terminals... Ifr ceilings tonight and Friday morning, vfr Friday late morning and afternoon. West winds 5 to 10 knots tonight and Friday morning, 10 to 15 knots with a few gusts to 20 knots possible Friday afternoon and early evening. Patchy stratus and fog probably returning late Friday afternoon and early evening. Marine As of 9:33 pm pdt Thursday... High pressure off the pacific northwest will keep gusty northwest winds going over the northern waters through tomorrow night with generally light to moderate northerly winds expected elsewhere. High pressure off the pacific northwest will merge with a high spanning alaska to the northwest territories over the weekend and early next week, the strongest winds will become confined to the northern outer coastal california waters. Light to moderate northwest swell will persist through the forecast period. Mtr watches warnings advisories Tngt Sca... Pt arena to pigeon pt 10-60 nm sca... Pt arena to pt reyes 0-10 nm public forecast: dykema aviation marine: canepa visit us at |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a mapWind History for Alameda, CA
(wind in knots) EDIT (on/off) Help| 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 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 | |
| Last 24hr | W | W G8 | W | W G11 | W | W G9 | W G11 | W G11 | W G12 | W | W | W | W | W G11 | W | W | W | W G11 | W G11 | W | W G15 | W | SW G8 | W G7 |
| 1 day ago | N | N | N | N | NW | N | N | N | NE | N | W | NW | W | W | W | W | W G11 | W G13 | W | W | W | W | W G9 | W |
| 2 days ago | E | SE | E | SE | SW | SW | SW | SW | W | W | W | W G10 | W G12 | W | N | N | N | W |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Oakland, Metro Oakland International Airport, CA | 6 mi | 47 min | W 9 | 9.00 mi | Mostly Cloudy | 55°F | 48°F | 80% | 1015.8 hPa |
| Hayward, Hayward Air Terminal, CA | 11 mi | 46 min | NNW 5 | 9.00 mi | Mostly Cloudy | 53°F | 48°F | 86% | 1016.6 hPa |
| San Francisco, San Francisco International Airport, CA | 12 mi | 44 min | WNW 9 | 10.00 mi | A Few Clouds | 54°F | 48°F | 80% | 1015.5 hPa |
| Concord, Buchanan Field, CA | 17 mi | 47 min | SW 10 | 10.00 mi | Fair | 62°F | 45°F | 54% | 1012.5 hPa |
| San Carlos Airport, CA | 17 mi | 45 min | NW 3 | 9.00 mi | Fair | 55°F | 48°F | 77% | 1015.6 hPa |
| Livermore, Livermore Municipal Airport, CA | 23 mi | 47 min | NW 4 | 10.00 mi | Fair | 57°F | 46°F | 69% | 1014.2 hPa |
| Half Moon Bay Airport, CA | 23 mi | 45 min | NW 4 | 5.00 mi | Fog/Mist | 52°F | 50°F | 94% | 1016.3 hPa |
Wind History from OAK (wind in knots)
| 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 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 | |
| Last 24hr | NW | NW | NW | NW | NW | NW | N | Calm | Calm | NW | W | NW | W | W | W | W | W | W | W | W | W | W | W | |
| 1 day ago | NW | NW | NW | NW | Calm | N | Calm | NW | N | Calm | W | W | W | W | W | W | W | NW | W | NW | W | W | W | NW |
| 2 days ago | W | Calm | Calm | NW | Calm | Calm | NE | Calm | NE | Calm | S | SW | SW | W | W | W | W | W | W | NW | NW | NW | NW | NW |
Tide / Current Tables for Oakland Harbor, Park Street Bridge, San Francisco Bay, California
EDIT Weekend mode (on/off) (on/off) Help One Week of DataOakland Harbor
Click for Map
Fri -- 12:32 AM PDT 3.04 feet Low Tide
Fri -- 02:11 AM PDT Moonrise
Fri -- 05:40 AM PDT 5.21 feet High Tide
Fri -- 06:19 AM PDT Sunrise
Fri -- 12:14 PM PDT Moonset
Fri -- 12:52 PM PDT 0.22 feet Low Tide
Fri -- 03:19 PM PDT Last Quarter
Fri -- 07:54 PM PDT Sunset
Fri -- 08:38 PM PDT 5.03 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 12:32 AM PDT 3.04 feet Low Tide
Fri -- 02:11 AM PDT Moonrise
Fri -- 05:40 AM PDT 5.21 feet High Tide
Fri -- 06:19 AM PDT Sunrise
Fri -- 12:14 PM PDT Moonset
Fri -- 12:52 PM PDT 0.22 feet Low Tide
Fri -- 03:19 PM PDT Last Quarter
Fri -- 07:54 PM PDT Sunset
Fri -- 08:38 PM PDT 5.03 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 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 |
| 3.1 | 3.1 | 3.4 | 4 | 4.6 | 5.1 | 5.2 | 4.8 | 4.1 | 3.1 | 1.9 | 1 | 0.4 | 0.2 | 0.5 | 1.1 | 2 | 2.9 | 3.8 | 4.5 | 5 | 5 | 4.7 | 4.1 |
Tide / Current Tables for Oakland Harbor WebStreeter Street, San Francisco Bay, California Current
EDIT (on/off) Help One Week of DataOakland Harbor WebStreeter Street
Click for Map
Fri -- 12:32 AM PDT 0.00 knots Slack
Fri -- 02:11 AM PDT Moonrise
Fri -- 03:07 AM PDT 0.36 knots Max Flood
Fri -- 05:39 AM PDT -0.00 knots Slack
Fri -- 06:19 AM PDT Sunrise
Fri -- 08:48 AM PDT -0.92 knots Max Ebb
Fri -- 12:14 PM PDT Moonset
Fri -- 01:07 PM PDT 0.00 knots Slack
Fri -- 03:19 PM PDT Last Quarter
Fri -- 04:46 PM PDT 0.78 knots Max Flood
Fri -- 07:49 PM PDT -0.00 knots Slack
Fri -- 07:54 PM PDT Sunset
Fri -- 10:15 PM PDT -0.41 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 12:32 AM PDT 0.00 knots Slack
Fri -- 02:11 AM PDT Moonrise
Fri -- 03:07 AM PDT 0.36 knots Max Flood
Fri -- 05:39 AM PDT -0.00 knots Slack
Fri -- 06:19 AM PDT Sunrise
Fri -- 08:48 AM PDT -0.92 knots Max Ebb
Fri -- 12:14 PM PDT Moonset
Fri -- 01:07 PM PDT 0.00 knots Slack
Fri -- 03:19 PM PDT Last Quarter
Fri -- 04:46 PM PDT 0.78 knots Max Flood
Fri -- 07:49 PM PDT -0.00 knots Slack
Fri -- 07:54 PM PDT Sunset
Fri -- 10:15 PM PDT -0.41 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 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 |
| -0.1 | 0.1 | 0.3 | 0.4 | 0.3 | 0.2 | -0.1 | -0.5 | -0.8 | -0.9 | -0.8 | -0.7 | -0.4 | -0.1 | 0.3 | 0.6 | 0.7 | 0.8 | 0.6 | 0.3 | -0.1 | -0.3 | -0.4 | -0.4 |
Weather Map and Satellite Images
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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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (1,6,7,8)
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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. |