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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 6:29AM | Sunset 7:54PM | Thursday August 22, 2019 11:44 PM PDT (06:44 UTC) | Moonrise 10:54PM | Moonset 12:05PM | Illumination 48% |  |
PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 917 Pm Pdt Thu Aug 22 2019
.small craft advisory in effect from 9 am pdt Friday through Friday evening...
Tonight..SW winds 10 to 20 kt with gusts up to 25 kt.
Fri..SW winds 10 to 20 kt with gusts up to 30 kt.
Fri night..SW winds 10 to 15 kt with gusts up to 25 kt.
Sat..SW winds 10 to 15 kt.
Sat night..SW winds 10 to 15 kt.
Sun..SW winds 15 to 20 kt with gusts up to 30 kt.
Sun night..SW winds 5 to 10 kt.
Mon..SW winds 15 to 20 kt.
Tue..SW winds 15 to 20 kt with gusts up to 25 kt.
.small craft advisory in effect from 9 am pdt Friday through Friday evening...
Tonight..SW winds 10 to 20 kt with gusts up to 25 kt.
Fri..SW winds 10 to 20 kt with gusts up to 30 kt.
Fri night..SW winds 10 to 15 kt with gusts up to 25 kt.
Sat..SW winds 10 to 15 kt.
Sat night..SW winds 10 to 15 kt.
Sun..SW winds 15 to 20 kt with gusts up to 30 kt.
Sun night..SW winds 5 to 10 kt.
Mon..SW winds 15 to 20 kt.
Tue..SW winds 15 to 20 kt with gusts up to 25 kt.
PZZ500 917 Pm Pdt Thu Aug 22 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds across the waters will generate a steep northwest swell hazardous to small craft vessels at 8 to 10 second periods tonight into Friday. A coastally trapped southerly wind reversal will also develop turning winds to a southwesterly direction along the coast late tonight through Friday. A decreasing northerly pressure gradient and winds Friday will ease aforementioned wind generated seas. Small, longer period swells will move through the coastal waters next week.
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds across the waters will generate a steep northwest swell hazardous to small craft vessels at 8 to 10 second periods tonight into Friday. A coastally trapped southerly wind reversal will also develop turning winds to a southwesterly direction along the coast late tonight through Friday. A decreasing northerly pressure gradient and winds Friday will ease aforementioned wind generated seas. Small, longer period swells will move through the coastal waters next week.
7 Day Forecast for Marine Location Near Montalvin Manor, CA
Hourly EDIT Helplocation: 38.06, -122.39 debug
Area Discussion for - San Francisco/Monterey Bay Area, CA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus66 kmtr 230614 afdmtr area forecast discussion national weather service san francisco bay area 1114 pm pdt Thu aug 22 2019 Synopsis The warm temperatures today cool slightly on Friday across the bay area. However, high dew point temperatures tomorrow will keep inland areas feeling warmer. Temperatures will increase this weekend as high pressure builds over california lasting through the early work week. By midweek, moisture increases as the remnants of ivo traverses northward in the pacific ocean just off the california coast allowing muggy conditions to return. Discussion As of 9:40 pm pdt Thursday... Higher humidity values today, especially this morning, resulted in much warmer minimum temperatures, especially in higher terrain areas. This morning's lows ranged from the upper 50s to the lower 70s, which were as many as 10 to 15 degrees above yesterday's mins in some cases. High temperatures today were a mixed bag, with some warmer and some slightly cooler than yesterday's values. Today's highs ranged from the 60s to lower 70s at the immediate coast to the 80s and 90s most other locations. The warmest locations reached 100 degrees, bookending our cwa, at pope valley in northern napa county, as well as bradley in southern monterey county. Current observations indicate that dew point temperatures are cooler than last night at this time, thus, expect cooler minimum temperatures tonight. Latest satellite imagery shows scant stratus formation thus far, limited to along the coast from san mateo county south as well as through the monterey bay and starting to extend down the salinas valley. The marine layer depth is a little higher per the fort ord profiler, and onshore flow persists with 2.5 mb between sfo and sac, so expect the area of low clouds to expand farther inland overnight. Did a minor update to the temperature forecast for tomorrow, mainly to cool some temperatures somewhat to reflect a slightly stronger seabreeze by tomorrow afternoon. Previous discussion There are higher dewpoint temperatures today around the bay area, ranging from 61 in salinas to 69 in san jose giving a muggy feel to the day. The marine layer has been pseudo- constant around 1500 feet the last few hours and will remain fairly shallow overnight, though patchy fog may be possible in the early morning hours along the coast. Onshore flow strengthens slightly tomorrow, providing slightly cooler temperatures on Friday. Lingering higher dew point temperatures inland will keep temperatures feeling warmer for interior locations. High pressure builds over california this weekend which will drive a warming trend for temperatures. Temperatures will MAX out on Sunday in the mid to upper 90s, with isolated locations in southern san benito and monterey counties reaching the low 100s. However, those values are based on current models having the ridge axis of high |
pressure north of the bay area. If the ridge retrogrades slightly, temperatures around our area could increase even higher, thus will be monitored as the next round of models are produced. The warming trend looks to continue through the early part of the work week. By Wednesday, the remnants of the tropical system ivo will have moved northward in the pacific just west of the bay area. Ivo will bring an increase in moisture giving a better chance for clouds cover across the area and an overall muggy feeling. No precipitation or thunderstorms are currently forecast, though it will be something that will be closely monitored as the time interval draws closer. Aviation As of 11:14 pm pdt Thursday...VFR except vlifr-ifr along the coast, extending eastward over the san francisco bay, and also moving into nearby coastal valleys tonight and Friday morning. On Friday diurnal mixing should lift ceilings toVFR at most, mainly inland, terminals, however in terms of areal coverage of coastal stratus and fog it's a very low confidence forecast for Friday into Saturday morning; a 4 mb smx-sfo pressure gradient and wind will be juxtaposed to a diminishing 3 mb or less acv-sfo pressure gradient and wind resulting in any combination of coverage. Vicinity of ksfo...VFR, west wind has diminished. Seeing signs that the aforementioned smx-sfo pressure gradient is getting a foothold (usually the NAM is slow with this forecast). Under a compressed marine layer this combination should keepVFR going for the period. Sfo bridge approach... Similar to ksfo. Monterey bay terminals... Vlifr-ifr due to increasing stratus and fog coverage extending into the salinas valley. Low ceilings and visibilities lift toVFR by late Friday morning, then low confidence stratus and fog return Friday evening and night. Marine As of 9:17 pm pdt Thursday... Northwest winds across the waters will generate a steep northwest swell hazardous to small craft vessels at 8 to 10 second periods tonight into Friday. A coastally trapped southerly wind reversal will also develop turning winds to a southwesterly direction along the coast late tonight through Friday. A decreasing northerly pressure gradient and winds Friday will ease aforementioned wind generated seas. Small, longer period swells will move through the coastal waters next week. Mtr watches warnings advisories Tngt Sca... Pt arena to pigeon pt 10-60 nm sca... Pt reyes to pigeon pt 0-10 nm until 3 am sca... Pt pinos to pt piedras blancas 0-10 nm until 3 am sca... Pigeon pt to pt piedras blancas 10-60 nm until 3 am sca... Pt arena to pt reyes 0-10 nm public forecast: sims 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 Richmond, CA
(wind in knots) EDIT (on/off) Help| 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 | |
| Last 24hr | S G8 | S G11 | S | S G13 | S G14 | S | S G11 | S | S | S | S G10 | S G8 | S G8 | SE G9 | S | S | SE G11 | SE | S G12 | S G9 | S | S G11 | S | S |
| 1 day ago | S | S | S | S G11 | S G10 | S | S | S | SE | SE G7 | S | S | S G7 | S G9 | SE | E | SE | SW G6 | NW | NW | NW G5 | NW G18 | S G8 | S G9 |
| 2 days ago | S G6 | SW | NW | NW | W | S G11 | SE | SE G8 | SE G9 | SE G10 | S G8 | S G8 | SW G8 | NW | NW G17 | NW G14 | SE G5 | SE G7 | S G8 |
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 |
| Novato / Gnoss Field, CA | 11 mi | 3.8 hrs | E 6 | 10.00 mi | Fair | 77°F | 59°F | 54% | 1005.8 hPa |
| Napa, Napa County Airport, CA | 12 mi | 1.8 hrs | S 4 | 9.00 mi | Fair | 65°F | 60°F | 84% | 1005.9 hPa |
| Petaluma Municipal Airport, CA | 18 mi | 4.8 hrs | Var 5 | 8.00 mi | Fair | 79°F | 59°F | 51% | 1006.1 hPa |
| Concord, Buchanan Field, CA | 19 mi | 1.9 hrs | S 5 | 10.00 mi | Fair | 80°F | 52°F | 38% | 1004.6 hPa |
Link to 5 minute data for KDVO
Wind History from DVO (wind in knots)
| -12 PM | 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 | |
| Last 24hr | NE | E | E | SE | Calm | Calm | Calm | Calm | Calm | Calm | Calm | SE | G10 | SW | SW | SW | SW | NE | SE | Calm | N | N | ||
| 1 day ago | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | N | SW | W G14 | SW | W G18 | SW | E G11 | S | G14 | SE G13 | SE | S | ||
| 2 days ago | Calm | Calm | Calm | Calm | Calm | SW | NW | N | Calm | SW G16 | SW G15 | SW | SW | SW | SW G18 | SW G18 | SW | Calm | E | NE | N | Calm |
Tide / Current Tables for Pinole Point, San Pablo Bay, California
EDIT Weekend mode (on/off) (on/off) Help One Week of DataPinole Point
Click for Map
Fri -- 01:08 AM PDT 1.34 feet Low Tide
Fri -- 06:31 AM PDT Sunrise
Fri -- 07:34 AM PDT 3.96 feet High Tide
Fri -- 07:58 AM PDT Last Quarter
Fri -- 12:37 PM PDT 2.42 feet Low Tide
Fri -- 02:06 PM PDT Moonset
Fri -- 07:02 PM PDT 5.77 feet High Tide
Fri -- 07:52 PM PDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 01:08 AM PDT 1.34 feet Low Tide
Fri -- 06:31 AM PDT Sunrise
Fri -- 07:34 AM PDT 3.96 feet High Tide
Fri -- 07:58 AM PDT Last Quarter
Fri -- 12:37 PM PDT 2.42 feet Low Tide
Fri -- 02:06 PM PDT Moonset
Fri -- 07:02 PM PDT 5.77 feet High Tide
Fri -- 07:52 PM PDT Sunset
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 |
| 1.6 | 1.3 | 1.5 | 1.9 | 2.5 | 3.1 | 3.6 | 3.9 | 3.9 | 3.7 | 3.2 | 2.8 | 2.5 | 2.4 | 2.7 | 3.3 | 4.1 | 4.9 | 5.5 | 5.8 | 5.6 | 4.9 | 4 | 2.9 |
Tide / Current Tables for Petaluma River Approach, San Pablo Bay, California Current
EDIT (on/off) Help One Week of DataPetaluma River Approach
Click for Map
Fri -- 02:10 AM PDT 0.00 knots Slack
Fri -- 04:34 AM PDT 0.36 knots Max Flood
Fri -- 06:31 AM PDT Sunrise
Fri -- 07:58 AM PDT Last Quarter
Fri -- 08:06 AM PDT -0.00 knots Slack
Fri -- 10:24 AM PDT -0.37 knots Max Ebb
Fri -- 01:12 PM PDT 0.00 knots Slack
Fri -- 02:07 PM PDT Moonset
Fri -- 03:56 PM PDT 0.66 knots Max Flood
Fri -- 07:23 PM PDT -0.00 knots Slack
Fri -- 07:52 PM PDT Sunset
Fri -- 10:36 PM PDT -0.77 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 02:10 AM PDT 0.00 knots Slack
Fri -- 04:34 AM PDT 0.36 knots Max Flood
Fri -- 06:31 AM PDT Sunrise
Fri -- 07:58 AM PDT Last Quarter
Fri -- 08:06 AM PDT -0.00 knots Slack
Fri -- 10:24 AM PDT -0.37 knots Max Ebb
Fri -- 01:12 PM PDT 0.00 knots Slack
Fri -- 02:07 PM PDT Moonset
Fri -- 03:56 PM PDT 0.66 knots Max Flood
Fri -- 07:23 PM PDT -0.00 knots Slack
Fri -- 07:52 PM PDT Sunset
Fri -- 10:36 PM PDT -0.77 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 |
| -0.5 | -0.3 | -0 | 0.2 | 0.3 | 0.4 | 0.3 | 0.2 | 0 | -0.2 | -0.4 | -0.3 | -0.2 | -0 | 0.3 | 0.6 | 0.7 | 0.6 | 0.4 | 0.1 | -0.2 | -0.5 | -0.7 | -0.8 |
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 (2,6,7,8)
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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. |