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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 6:24AM | Sunset 8:01PM | Saturday August 17, 2019 7:19 AM PDT (14:19 UTC) | Moonrise 8:32PM | Moonset 7:18AM | Illumination 96% |  |
PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 314 Am Pdt Sat Aug 17 2019
.small craft advisory in effect from 3 pm pdt this afternoon through this evening...
Today..SW winds 15 to 25 kt with gusts up to 30 kt.
Tonight..SW winds 15 to 25 kt with gusts up to 30 kt...decreasing to 10 to 20 kt by midnight.
Sun..SW winds 10 to 20 kt with gusts up to 25 kt.
Sun night..SW winds 10 to 15 kt.
Mon..SW winds 10 to 15 kt.
Mon night..SW winds 10 to 15 kt.
Tue..SW winds 10 to 15 kt.
Wed..W winds 15 to 20 kt.
.small craft advisory in effect from 3 pm pdt this afternoon through this evening...
Today..SW winds 15 to 25 kt with gusts up to 30 kt.
Tonight..SW winds 15 to 25 kt with gusts up to 30 kt...decreasing to 10 to 20 kt by midnight.
Sun..SW winds 10 to 20 kt with gusts up to 25 kt.
Sun night..SW winds 10 to 15 kt.
Mon..SW winds 10 to 15 kt.
Mon night..SW winds 10 to 15 kt.
Tue..SW winds 10 to 15 kt.
Wed..W winds 15 to 20 kt.
PZZ500 314 Am Pdt Sat Aug 17 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate to gusty northwesterly winds will continue over the northern and outer waters into Sunday as high pressure remains over the eastern pacific. This high pressure will begin to weaken into Sunday before a strong low pressure center develops and approaches british columbia early next week. The persistent fetch produced by these systems will generate fresh short period swell that will propagate into the california coastal waters. This short period swell in combination with gusty winds will generate hazardous seas conditions, particularly for smaller vessels.
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate to gusty northwesterly winds will continue over the northern and outer waters into Sunday as high pressure remains over the eastern pacific. This high pressure will begin to weaken into Sunday before a strong low pressure center develops and approaches british columbia early next week. The persistent fetch produced by these systems will generate fresh short period swell that will propagate into the california coastal waters. This short period swell in combination with gusty winds will generate hazardous seas conditions, particularly for smaller vessels.
7 Day Forecast for Marine Location Near Pinole, CA
Hourly EDIT Helplocation: 38.04, -122.34 debug
Area Discussion for - San Francisco/Monterey Bay Area, CA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus66 kmtr 171215 afdmtr area forecast discussion national weather service san francisco bay area 512 am pdt Sat aug 17 2019 Synopsis The marine layer has returned to the bay area and will continue to usher in cooler temperatures through the weekend as onshore breezes continue. Dry and seasonable conditions early next week turning into a warming trend inland as high pressure builds from the deserts through next weekend. Discussion As of 3:08 am pdt Saturday... A solid 2000 foot marine layer has returned to the coast with low clouds filling the valleys of the central coast. Onshore breezes induced by a 2.5 mb sfo to sac onshore gradient will continue to allow for more low cloud formation through sunrise inside sf bay and up into the north bay valleys. Upper low level pressure with a closed circulation at 700 mb will drop to just west of the golden gate later this afternoon. That should mean a slow burn off of the stratus back to the coast through midday. A general cooling trend continues, especially inland where locations that were around 100 could cool towards the low to mid 80s this afternoon. Closer to the bay trends should be 4-8 degrees cooler with highs generally in the 70s. The upper trough axis stays positioned right over san francisco tonight into Sunday. This should allow the marine layer to deepen to at least 2500 feet and possibly deeper. Not surprisingly the models portend a big push of stratus tonight into Sunday morning with low clouds likely pushing out into the delta and possibly bumping into the foothills. Given the deep marine layer, onshore gradients and cool air aloft expect a slow burn off of stratus inside sf bay Sunday with cool temperatures regionwide as the inland valleys struggle to reach the low 80s. Sunday should be the coolest day followed by a modest warming trend early next week as high pressure slowly builds. However, the pattern looks stagnant early next week. The main player will then be another ridge building from the desert southwest that should induce another warming trend by the middle of next week. Models continue to augur some tropical activity west of baja by next weekend that allows a broad 595 dm ridge to build over the west coast and out into the pacific which suggests above normal temps in the extended. Aviation As of 5:12 am pdt Saturday... Lifr-ifr spreading inland due to robust cooling deepening the marine layer at a faster pace since late last evening and a southerly wind driven by a 3.5 mb smx-sfo and 3 mb sns-sjc pressure gradients and an onshore wind with a 2.5 mb sfo-sac pressure gradient. On the |
profilers 4c of cooling has occurred near 2500 feet with the marine layer depth approx 2000 feet and lifting, light drizzle also wetting the ground on parts of the monterey peninsula. Coastal stratus and fog making solid strides inland even more so tonight per WRF model output which is having trouble keeping up with the coverage early this morning. At least partial clearing taking place by late this morning through mid afternoon with diurnal warming and a steadily deepening marine layer. The NAM forecasts the smx-sfo gradient to hold near 4 mb through today then weakening on Sunday. There may be enough cooling at the marine layer inversion to weaken it to the point of mixing out completely on Sunday based on the NAM which includes cool air advection arriving from the northwest with an elevated cold front (at the 925 mb and 850 mb levels) approaching the coast Sunday. Vicinity of ksfo...VFR except stratus is circling around the terminal at a faster pace including in the approach. Low confidence sky and wind forecast for the morning, southerly pressure gradient is resulting in light variable wind occasionally shifting to a southerly direction. Sfo bridge approach... Similar to ksfo. Monterey bay terminals... Lifr-ifr, patchy drizzle this morning. Ceilings lifting to MVFR by late morning,VFR this afternoon, but probably short lived as stratus and fog inundates the coast again tonight. MVFR-ifr tonight and Sunday morning, patchy drizzle likely. Marine As of 4:41 am pdt Saturday... Moderate to gusty northwesterly winds will continue over the northern and outer waters into Sunday as high pressure remains over the eastern pacific. This high pressure will begin to weaken into Sunday before a strong low pressure center develops and approaches british columbia early next week. The persistent fetch produced by these systems will generate fresh short period swell that will propagate into the california coastal waters. This short period swell in combination with gusty winds will generate hazardous seas conditions, particularly for smaller vessels. Mtr watches warnings advisories Tday Sca... Pt arena to pigeon pt 10-60 nm sca... Pt arena to pt reyes 0-10 nm until 3 pm sca... Sf bay from 3 pm sca... Pigeon pt to pt piedras blancas 10-60 nm until 9 am public forecast: rww 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| 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 | 7 AM | |
| Last 24hr | S | SE | SE | S G9 | SW G8 | SW | S | NW | S G10 | W G6 | W G7 | S G7 | S G9 | SW G8 | S G11 | S G17 | S G13 | S G13 | SW G14 | S G18 | SW G14 | SW G10 | SW G11 | SW G14 |
| 1 day ago | SE | S | SE | SE | S | S | SE | SE | SE | SE | SE | SE | SE | S | S G10 | S G12 | S G14 | S G12 | S G11 | SW G10 | S | NW | SW | -- |
| 2 days ago | E | S | S | SE | SE | SE | S | S | SE G6 | SE | SE | SE G5 | SE G6 | SE | SE | SE G7 | S G14 | S G9 | S G10 | S G9 | SW | N | E | SE |
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 |
| Napa, Napa County Airport, CA | 12 mi | 25 min | WNW 3 | 10.00 mi | Mostly Cloudy | 57°F | 55°F | 93% | 1008.7 hPa |
| Novato / Gnoss Field, CA | 14 mi | 44 min | N 0 | 5.00 mi | Fog/Mist | 52°F | 51°F | 100% | 1009.5 hPa |
| Concord, Buchanan Field, CA | 16 mi | 26 min | W 4 | 10.00 mi | Fair | 62°F | 54°F | 75% | 1007.6 hPa |
| Petaluma Municipal Airport, CA | 21 mi | 44 min | N 0 | 3.00 mi | Fog/Mist | 54°F | 53°F | 100% | 1009.8 hPa |
| Oakland, Metro Oakland International Airport, CA | 24 mi | 26 min | SW 13 | 10.00 mi | Mostly Cloudy | 63°F | 55°F | 78% | 1009.9 hPa |
Link to 5 minute data for KAPC
Wind History from APC (wind in knots)
| 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 | 7 AM | |
| Last 24hr | SE | Calm | SW | S | SW | S | S | S | S | S | S | S | S | S | SW | Calm | W | |||||||
| 1 day ago | Calm | Calm | SW | S | SW | SW | S | S | S | S | Calm | Calm | E | E | E | |||||||||
| 2 days ago | Calm | Calm | S | SW | SW | SW | SW | SW | S | SW | SW | W | SW | S | S | S | Calm | NW | SE | SE | Calm | Calm | 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
Sat -- 02:04 AM PDT 6.01 feet High Tide
Sat -- 06:26 AM PDT Sunrise
Sat -- 08:18 AM PDT Moonset
Sat -- 08:47 AM PDT 0.17 feet Low Tide
Sat -- 03:29 PM PDT 5.27 feet High Tide
Sat -- 08:00 PM PDT Sunset
Sat -- 08:56 PM PDT 2.17 feet Low Tide
Sat -- 09:31 PM PDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 02:04 AM PDT 6.01 feet High Tide
Sat -- 06:26 AM PDT Sunrise
Sat -- 08:18 AM PDT Moonset
Sat -- 08:47 AM PDT 0.17 feet Low Tide
Sat -- 03:29 PM PDT 5.27 feet High Tide
Sat -- 08:00 PM PDT Sunset
Sat -- 08:56 PM PDT 2.17 feet Low Tide
Sat -- 09:31 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 |
| 4.9 | 5.7 | 6 | 5.8 | 5 | 3.7 | 2.3 | 1.1 | 0.4 | 0.2 | 0.6 | 1.5 | 2.6 | 3.7 | 4.7 | 5.2 | 5.2 | 4.7 | 3.9 | 3 | 2.4 | 2.2 | 2.5 | 3.2 |
Tide / Current Tables for Pinole Point 1.2 mi W, San Pablo Bay, California Current
EDIT (on/off) Help One Week of DataPinole Point 1.2 mi W
Click for Map
Sat -- 02:48 AM PDT -0.00 knots Slack
Sat -- 06:05 AM PDT -1.11 knots Max Ebb
Sat -- 06:26 AM PDT Sunrise
Sat -- 08:18 AM PDT Moonset
Sat -- 09:43 AM PDT 0.00 knots Slack
Sat -- 12:16 PM PDT 0.83 knots Max Flood
Sat -- 04:22 PM PDT -0.00 knots Slack
Sat -- 06:55 PM PDT -0.64 knots Max Ebb
Sat -- 08:00 PM PDT Sunset
Sat -- 09:31 PM PDT Moonrise
Sat -- 09:38 PM PDT 0.00 knots Slack
Sat -- 11:49 PM PDT 0.75 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 02:48 AM PDT -0.00 knots Slack
Sat -- 06:05 AM PDT -1.11 knots Max Ebb
Sat -- 06:26 AM PDT Sunrise
Sat -- 08:18 AM PDT Moonset
Sat -- 09:43 AM PDT 0.00 knots Slack
Sat -- 12:16 PM PDT 0.83 knots Max Flood
Sat -- 04:22 PM PDT -0.00 knots Slack
Sat -- 06:55 PM PDT -0.64 knots Max Ebb
Sat -- 08:00 PM PDT Sunset
Sat -- 09:31 PM PDT Moonrise
Sat -- 09:38 PM PDT 0.00 knots Slack
Sat -- 11:49 PM PDT 0.75 knots Max Flood
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 |
| 0.7 | 0.5 | 0.3 | -0.1 | -0.6 | -1 | -1.1 | -1 | -0.8 | -0.4 | 0.2 | 0.6 | 0.8 | 0.8 | 0.7 | 0.4 | 0.1 | -0.3 | -0.6 | -0.6 | -0.5 | -0.3 | 0.2 | 0.6 |
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 (10,2,3,4)
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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. |