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Marine Weather and Tides
Version 3.4 |
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen |
| Sunrise 6:26AM | Sunset 7:59PM | Monday August 19, 2019 2:23 PM PDT (21:23 UTC) | Moonrise 9:25PM | Moonset 9:11AM | Illumination 82% |  |
PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 213 Pm Pdt Mon Aug 19 2019
.small craft advisory in effect from Tuesday afternoon through Tuesday evening...
Rest of today..SW winds 15 to 20 kt with gusts up to 25 kt.
Tonight..SW winds 10 to 15 kt.
Tue..SW winds 5 to 15 kt...increasing to 15 to 20 kt with gusts up to 30 kt in the afternoon.
Tue night..SW winds 10 to 15 kt.
Wed..SW winds 10 to 15 kt.
Wed night..W winds 10 to 15 kt.
Thu..SW winds 15 to 25 kt with gusts up to 30 kt.
Fri..SW winds 15 to 20 kt.
.small craft advisory in effect from Tuesday afternoon through Tuesday evening...
Rest of today..SW winds 15 to 20 kt with gusts up to 25 kt.
Tonight..SW winds 10 to 15 kt.
Tue..SW winds 5 to 15 kt...increasing to 15 to 20 kt with gusts up to 30 kt in the afternoon.
Tue night..SW winds 10 to 15 kt.
Wed..SW winds 10 to 15 kt.
Wed night..W winds 10 to 15 kt.
Thu..SW winds 15 to 25 kt with gusts up to 30 kt.
Fri..SW winds 15 to 20 kt.
PZZ500 213 Pm Pdt Mon Aug 19 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light to moderate northwesterly winds will persist over the coastal waters through mid-week as high pressure off the california coast weakens and a surface low develops offshore of the pacific northwest. Locally gusty winds are expected to develop late tonight along the big sur coast south of point sur. Breezy winds are also forecast for tomorrow afternoon and evening over the inner coastal waters from pigeon point to point pinos, over the northern san francisco bay around the golden gate and through the delta, and over the Monterey bay. Mixed seas will continue with shorter period northwest waves at around 8 to 10 seconds, a light longer period west swell, and a light southerly swell.
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light to moderate northwesterly winds will persist over the coastal waters through mid-week as high pressure off the california coast weakens and a surface low develops offshore of the pacific northwest. Locally gusty winds are expected to develop late tonight along the big sur coast south of point sur. Breezy winds are also forecast for tomorrow afternoon and evening over the inner coastal waters from pigeon point to point pinos, over the northern san francisco bay around the golden gate and through the delta, and over the Monterey bay. Mixed seas will continue with shorter period northwest waves at around 8 to 10 seconds, a light longer period west swell, and a light southerly swell.
7 Day Forecast for Marine Location Near Hercules, CA
Hourly EDIT Helplocation: 38.02, -122.29 debug
Area Discussion for - San Francisco/Monterey Bay Area, CA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus66 kmtr 192051 afdmtr area forecast discussion national weather service san francisco bay area 151 pm pdt Mon aug 19 2019 Synopsis A deep marine layer will prevail through today, maintaining widespread morning low clouds and cooler than normal inland temperatures. Warmer temperatures will develop by midweek and continue through the upcoming weekend as high pressure rebuilds. Discussion As of 1:52 pm pdt Monday... The deep marine layer has prevented the usual mid-day clearing across parts of the san francisco bay area and central california coast. As of 1 pm pdt, monterey, san francisco, and oakland airports were all still reporting overcast skies. While the slow and gradual clearing trend is expected to continue as the afternoon progresses, some locations along the immediate pacific coast may not see the sun shine at all today. The clouds are influencing temperature trends this afternoon as most airports are running about 2 to 7 degrees cooler than 24 hours ago. By the time the afternoon concludes, high temperatures will reach the 60s along the immediate coast and 70s to 80s for inland locations. The low clouds are expected to return again tonight with the chance of some light drizzle along the pacific coast. Synoptically, an upper level ridge presently centered over the southern plains is forecast to build and broaden westward towards the desert southwest and baja california over the next several days. This will result in a gradual compression of the marine layer by the middle of the week. Additionally, a noticeable warming trend will take place through at least mid-week with the most significant day-to-day warm-up occurring from Tuesday to Wednesday. Low 90s will become increasingly more likely on Wednesday across some of the region's typical hot spots such as king city, gilroy, livermore, and even santa rosa. Can't rule out some rural far-inland locations approaching the upper 90s low 100s, but at this point don't think last the MAX temperatures achieved last week will be repeated this week for the core population centers. Forecast guidance shows an upper level trough approaching the pacific northwest on Wednesday and Thursday with some precipitation potential for parts of oregon and washington state. While the san francisco bay area will be well south of any precipitation chances, the positioning of this trough will help prevent additional warming for our region. The current forecast by late week and into the weekend calls for forecast highs to generally fall within a several degrees of normal along the coast with inland locations at or slightly above normal. |
As mentioned in the previous overnight discussion, models are suggesting the potential for an uptick in tropical activity well to our south along the baja california coast by the weekend and into early next week. There still remains plenty of uncertainty this far out, but will have to keep tabs on any development as northbound moisture transport to parts of the southern california coast and possibly even the central california coast isn't completely out of the question by early next week. Aviation As of 10:36 am pdt Monday... For 18z tafs. The marine layer is still fairly deep at around 2500 ft agl per the fort ord profiler. Satellite imagery shows stratus remains over much of the region this morning, but is finally beginning to dissipate. Vfr conditions to prevail by this afternoon with clearing currently expected between 18z-20z. MVFR to ifr CIGS to return this evening and prevail again overnight for most sites.VFR conditions will last later into the evening for more inland locations. W to SW winds this morning increasing this afternoon to 10-15 kt with locally higher gusts at ksfo. Vicinity of ksfo... MVFR CIGS to continue until around 19z-20z.VFR conditions expected this afternoon with models showing an earlier return of MVFR CIGS this evening. SW to W winds around 10 kt this morning increasing to 15 kt this afternoon with gusts 20-25 kt after around 20z-21z. Sfo bridge approach... Similar to ksfo. Monterey bay terminals... MVFR ceilings until 18z-20z. Satellite shows a decent feed of stratus into the peninsula. It is possible that MVFR CIGS could linger around kmry longer than currently forecast. Will keep an eye on satellite obs and update the TAF as needed. Light winds this morning turning onshore in the afternoon and increasing to 10-15 kt.VFR conditions expected in the afternoon before MVFR CIGS return early to mid evening and for the overnight hours. Marine As of 8:12 am pdt Monday... Generally light winds today and tonight across the coastal waters as high pressure off the california coast weakens and a surface low develops offshore of the pacific northwest. Locally gusty winds are expected later today and into tomorrow over the inner coastal waters south of point sur. Mixed seas will continue with shorter period northwest waves at around 8 to 10 seconds, a light longer period west swell, and a light southerly swell. Mtr watches warnings advisories Tngt Sca... Pt pinos to pt piedras blancas 0-10 nm from 3 am public forecast: rowe aviation: as marine: as visit us at |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a mapWind History for Point Potrero Richmond, CA
(wind in knots) EDIT (on/off) Help| 2 PM | 3 PM | 4 PM | -12 PM | -12 PM | -12 PM | -12 PM | 9 PM | 10 PM | 11 PM | -12 PM | -12 PM | 2 AM | 3 AM | -12 PM | 5 AM | 6 AM | -12 PM | 8 AM | 9 AM | -12 PM | 11 AM | 12 PM | 1 PM | |
| Last 24hr | SW G20 | W G21 | SW G25 | SW G20 | SW G18 | SW G17 | SW G14 | SW G15 | SW | SW G11 | S G9 | SW | SW G11 | SW G12 | S | |||||||||
| 1 day ago | SW G22 | SW | SW G27 | SW G24 | SW G22 | SW G22 | SW G22 | SW G19 | SW | SW G17 | W | W | W | SW | W | W | W G8 | W | W G12 | SW G18 | ||||
| 2 days ago | S G11 | S | S | SW G15 | SW G17 | SW | SW | SW | SW G22 | SW G24 | SW G15 | SW G10 | SW G12 | SW G17 | SW G16 | SW G20 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Concord, Buchanan Field, CA | 13 mi | 31 min | S 13 | 10.00 mi | Fair | 76°F | 55°F | 48% | 1013 hPa |
| Napa, Napa County Airport, CA | 13 mi | 30 min | SSW 9 | 10.00 mi | Mostly Cloudy | 71°F | 57°F | 63% | 1014 hPa |
| Novato / Gnoss Field, CA | 16 mi | 29 min | E 6 | 10.00 mi | Fair | 73°F | 59°F | 61% | 1014.6 hPa |
| Oakland, Metro Oakland International Airport, CA | 22 mi | 31 min | W 8 | 10.00 mi | Partly Cloudy | 70°F | 55°F | 61% | 1015.6 hPa |
| Petaluma Municipal Airport, CA | 23 mi | 29 min | N 0 | 10.00 mi | Fair | 75°F | 59°F | 57% | 1014.6 hPa |
Link to 5 minute data for KCCR
Wind History from CCR (wind in knots)
| 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 | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | |
| Last 24hr | W | W | W | W | W | W | W | SW | SW | W G19 | SW | SW | SW | SW | SW | SW | SW | S | ||||||
| 1 day ago | W | W | SW | SW G14 | S | W | SW | SW | SW | SW | W | W | W | SW | SW | SW | SW | NW G17 | NW | |||||
| 2 days ago | W | W | SW | W | SW | W | W | W | W | W | W | SW | SW | SW | SW | SW G18 | W |
Tide / Current Tables for Hercules, Refugio Landing, San Pablo Bay, California
EDIT Weekend mode (on/off) (on/off) Help One Week of DataHercules
Click for Map
Mon -- 03:19 AM PDT 5.74 feet High Tide
Mon -- 06:27 AM PDT Sunrise
Mon -- 10:10 AM PDT Moonset
Mon -- 10:11 AM PDT 0.83 feet Low Tide
Mon -- 04:21 PM PDT 5.76 feet High Tide
Mon -- 07:57 PM PDT Sunset
Mon -- 10:24 PM PDT Moonrise
Mon -- 10:40 PM PDT 2.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Mon -- 03:19 AM PDT 5.74 feet High Tide
Mon -- 06:27 AM PDT Sunrise
Mon -- 10:10 AM PDT Moonset
Mon -- 10:11 AM PDT 0.83 feet Low Tide
Mon -- 04:21 PM PDT 5.76 feet High Tide
Mon -- 07:57 PM PDT Sunset
Mon -- 10:24 PM PDT Moonrise
Mon -- 10:40 PM PDT 2.11 feet Low 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 |
| 3.3 | 4.3 | 5.2 | 5.7 | 5.6 | 5.1 | 4.2 | 3 | 2 | 1.2 | 0.8 | 1.1 | 1.8 | 3 | 4.2 | 5.2 | 5.7 | 5.7 | 5.2 | 4.3 | 3.4 | 2.7 | 2.2 | 2.1 |
Tide / Current Tables for Davis Point, California Current
EDIT (on/off) Help One Week of DataDavis Point
Click for Map
Mon -- 02:01 AM PDT 1.37 knots Max Flood
Mon -- 04:44 AM PDT -0.00 knots Slack
Mon -- 06:27 AM PDT Sunrise
Mon -- 08:55 AM PDT -1.88 knots Max Ebb
Mon -- 10:10 AM PDT Moonset
Mon -- 12:08 PM PDT 0.00 knots Slack
Mon -- 02:29 PM PDT 1.73 knots Max Flood
Mon -- 05:50 PM PDT -0.00 knots Slack
Mon -- 07:57 PM PDT Sunset
Mon -- 09:45 PM PDT -1.40 knots Max Ebb
Mon -- 10:24 PM PDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Mon -- 02:01 AM PDT 1.37 knots Max Flood
Mon -- 04:44 AM PDT -0.00 knots Slack
Mon -- 06:27 AM PDT Sunrise
Mon -- 08:55 AM PDT -1.88 knots Max Ebb
Mon -- 10:10 AM PDT Moonset
Mon -- 12:08 PM PDT 0.00 knots Slack
Mon -- 02:29 PM PDT 1.73 knots Max Flood
Mon -- 05:50 PM PDT -0.00 knots Slack
Mon -- 07:57 PM PDT Sunset
Mon -- 09:45 PM PDT -1.40 knots Max Ebb
Mon -- 10:24 PM PDT Moonrise
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 |
| 0.2 | 1 | 1.4 | 1.1 | 0.5 | -0.2 | -0.8 | -1.4 | -1.8 | -1.9 | -1.7 | -1.1 | -0.2 | 0.9 | 1.6 | 1.6 | 1.2 | 0.5 | -0.1 | -0.7 | -1.1 | -1.3 | -1.4 | -1.2 |
Weather Map and Satellite Images
(on/off) HelpWeather Map
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 (17,4,5,8)
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Ground Weather Radar Station Sacramento, 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. |