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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 7:53PM | Thursday August 22, 2019 7:05 PM PDT (02:05 UTC) | Moonrise 10:54PM | Moonset 12:04PM | Illumination 50% |  |
PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 356 Pm Pdt Thu Aug 22 2019
.small craft advisory in effect from Friday morning through Friday evening...
Rest of today..SW winds 10 to 20 kt with gusts up to 25 kt.
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 25 kt with gusts up to 30 kt.
Mon..SW winds 15 to 20 kt.
.small craft advisory in effect from Friday morning through Friday evening...
Rest of today..SW winds 10 to 20 kt with gusts up to 25 kt.
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 25 kt with gusts up to 30 kt.
Mon..SW winds 15 to 20 kt.
PZZ500 356 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 strengthened across the waters today, particularly along the coastal jets and outer waters north of point reyes. These winds are driving a steep northwest swell at 8 to 10 seconds now into Friday that may be hazardous to small craft vessels. Winds will weaken and turn southwesterly along the coast later Friday. This wind shift will also ease wind generated seas. A pair of small, longer period swells will also move through the coastal waters into next week.
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds strengthened across the waters today, particularly along the coastal jets and outer waters north of point reyes. These winds are driving a steep northwest swell at 8 to 10 seconds now into Friday that may be hazardous to small craft vessels. Winds will weaken and turn southwesterly along the coast later Friday. This wind shift will also ease wind generated seas. A pair of small, longer period swells will also move through the coastal waters into next week.
7 Day Forecast for Marine Location Near Redwood City, CA
Hourly EDIT Helplocation: 37.52, -122.2 debug
Area Discussion for - San Francisco/Monterey Bay Area, CA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus66 kmtr 230131 afdmtr area forecast discussion national weather service san francisco bay area 622 pm pdt Thu aug 22 2019 Synopsis The warm temperatures today cool slightly on Friday across the bay area. However, higher 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 02:03 pm pdt Thursday... 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 6:22 pm pdt Thursday... An influx of drier air, an air flow with origins having more mid-latitude influence, has spread in on northwest coastal winds. Ifr ceilings due to coastal stratus and fog are presently limited to the san mateo coast and the southern half of the montery bay area and the northern salinas valley south along the coast to point sur. Elsewhere it'sVFR, and land based surface weather observations still show elevated dew point temperatures, a measure of water vapor, in the upper 50s to mid 60s. At present the latest WRF model boundary layer relative humidity is over-forecasting areal coverage of coastal stratus and fog. The marine layer remains compressed to 700 to 800 feet with inversion temperatures from 24c to 26c still plenty warm to keep the inversions intact through the period despite some near surface based cool air advection tonight and Friday. |
For this evening's volume, it's a moderate to high confidenceVFR forecast for the bay area terminals. Ifr will be confined to aforementioned locations for the evening, and still expecting ifr to spread inland tonight, however it'll be delayed somewhat until nighttime cooling and still favorable thermodynamics combine to produce increasing areal coverage of coastal stratus and fog. On Friday there should be sufficient diurnal mixing to lift ceilings to vfr at most, mainly inland, terminals, however in terms of areal coverage of stratus and fog it's a very low confidence forecast Friday into Saturday morning; a temporarily ramped up (4 mb) smx-sfo pressure gradient and wind juxtaposed to a diminishing (3 mb or less) acv-sfo pressure gradient and wind could cause any combination of coverage. Vicinity of ksfo...VFR, west wind 20 knots with occasional gusts to 30 knots until 04z this evening. The combination of a compressed marine layer and abscence of stratus and fog upstream to the northwest supports a moderate to high confidenceVFR forecast for the evening. After this however it's a lowering confidence ifr ceiling forecast for tonight. The terminal and approach may just hold on toVFR for the overnight and Friday if the aforementioned smx-sfo pressure gradient develops (usually the NAM is slow with this forecast) under a compressed marine layer. Will monitor as we approach the 06z TAF issuance, a reduction in ifr forecast duration for Friday morning is possible. Sfo bridge approach... Similar to ksfo. Monterey bay terminals... A solid coverage of stratus and fog exists over the southern monterey bay area and northern salinas valley. Lifr-ifr conditions forecast tonight with northwest winds ushering in some surface based cooling, a brief uptick in cooling and marine layer depth is most recently seen on the fort ord profiler, cooling then extends up to the 925 mb level Friday. Lifr-ifr Friday morning lifts toVFR by late morning. Marine As of 4:43 pm pdt Thursday... Northwest winds strengthened across the waters today, particularly along the coastal jets and outer waters north of point reyes. These winds are driving a steep northwest swell at 8 to 10 seconds now into Friday that may be hazardous to small craft vessels. Winds will weaken and turn southwesterly along the coast later Friday. This wind shift will also ease wind generated seas. A pair of small, longer period swells will also move through the coastal waters into next week. Mtr watches warnings advisories Tngt Sca... Mry bay until 9 pm sca... Pigeon pt to pt pinos 0-10 nm until 9 pm 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: dk aviation: canepa marine: drp visit us at |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a mapWind History for Redwood City, CA
(wind in knots) EDIT (on/off) Help| 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 | 3 PM | 4 PM | 5 PM | 6 PM | |
| Last 24hr | W G17 | NW G20 | W G13 | W G13 | W G13 | W G6 | N | N | S | SW | W | NW | NW | NW | SE | N | N | N G7 | NW G11 | N G14 | N G13 | NW | W | NW G16 |
| 1 day ago | W G17 | W | W G12 | SW G8 | W | SW | SW | SW | NW | S | S | S | S | W | E | E | E | N G8 | N G10 | NW G13 | W G16 | W G17 | W G20 | W |
| 2 days ago | W G17 | W | W G14 | W G10 | W | W | W | W G12 | SW G10 | SW | S G7 | NW | SW | W G7 | W | NW G10 | NW | W G14 | W G16 | NW G18 | NW G19 | W | NW G15 | W |
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 |
| San Carlos Airport, CA | 3 mi | 19 min | WNW 16 | 10.00 mi | Clear | 75°F | 57°F | 54% | 1006.4 hPa |
| Palo Alto Airport, CA | 5 mi | 19 min | NNW 15 | 10.00 mi | Clear | 72°F | 62°F | 73% | 1006.1 hPa |
| Mountain View, Moffett Field, CA | 10 mi | 10 min | N 11 | 10.00 mi | Fair | 74°F | 63°F | 69% | 1006.8 hPa |
| Hayward, Hayward Air Terminal, CA | 11 mi | 12 min | W 6 | 10.00 mi | Fair | 71°F | 60°F | 68% | 1007.4 hPa |
| San Francisco, San Francisco International Airport, CA | 11 mi | 10 min | W 20 | 10.00 mi | Partly Cloudy and Breezy | 67°F | 55°F | 68% | 1006.6 hPa |
| Oakland, Metro Oakland International Airport, CA | 12 mi | 13 min | W 15 | 10.00 mi | A Few Clouds | 70°F | 57°F | 66% | 1006.7 hPa |
| Half Moon Bay Airport, CA | 16 mi | 11 min | NW 7 | 5.00 mi | Fog/Mist | 63°F | 57°F | 83% | 1008.5 hPa |
| San Jose, San Jose International Airport, CA | 18 mi | 13 min | NW 11 | 10.00 mi | A Few Clouds | 77°F | 62°F | 60% | 1006.1 hPa |
| Livermore, Livermore Municipal Airport, CA | 24 mi | 13 min | W 7 | 10.00 mi | Fair | 85°F | 59°F | 42% | 1005.2 hPa |
| San Jose / Reid / Hillv, CA | 24 mi | 19 min | NW 9 | 10.00 mi | Clear | 86°F | 62°F | 46% | 1006.1 hPa |
Link to 5 minute data for KSQL
Wind History from SQL (wind in knots)
| 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 | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | |
| Last 24hr | W G18 | W G17 | NW | N | NW | N | N | W | W | W | W | |||||||||||||
| 1 day ago | W | W G16 | Calm | Calm | NW | NW | W | W G21 | W G18 | W G18 | W | |||||||||||||
| 2 days ago | W | W | W | SW | W | NW | W | W | W G19 | NW | W | W | W G15 | W G15 |
Tide / Current Tables for Redwood Creek entrance (inside), San Francisco Bay, California
EDIT Weekend mode (on/off) (on/off) Help One Week of DataRedwood Creek entrance (inside)
Click for Map
Thu -- 12:16 AM PDT 1.84 feet Low Tide
Thu -- 06:00 AM PDT 6.11 feet High Tide
Thu -- 06:30 AM PDT Sunrise
Thu -- 11:55 AM PDT 2.30 feet Low Tide
Thu -- 01:03 PM PDT Moonset
Thu -- 06:07 PM PDT 7.53 feet High Tide
Thu -- 07:52 PM PDT Sunset
Thu -- 11:53 PM PDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Thu -- 12:16 AM PDT 1.84 feet Low Tide
Thu -- 06:00 AM PDT 6.11 feet High Tide
Thu -- 06:30 AM PDT Sunrise
Thu -- 11:55 AM PDT 2.30 feet Low Tide
Thu -- 01:03 PM PDT Moonset
Thu -- 06:07 PM PDT 7.53 feet High Tide
Thu -- 07:52 PM PDT Sunset
Thu -- 11:53 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 |
| 1.9 | 2 | 2.8 | 3.9 | 5 | 5.8 | 6.1 | 5.9 | 5.2 | 4.2 | 3.2 | 2.5 | 2.3 | 2.7 | 3.5 | 4.7 | 6 | 7.1 | 7.5 | 7.3 | 6.6 | 5.4 | 4.1 | 2.8 |
Tide / Current Tables for Dumbarton Bridge, San Francisco Bay, California Current
EDIT (on/off) Help One Week of DataDumbarton Bridge
Click for Map
Thu -- 12:25 AM PDT 0.00 knots Slack
Thu -- 03:42 AM PDT 1.16 knots Max Flood
Thu -- 06:30 AM PDT Sunrise
Thu -- 07:34 AM PDT -0.00 knots Slack
Thu -- 09:40 AM PDT -0.61 knots Max Ebb
Thu -- 11:56 AM PDT 0.00 knots Slack
Thu -- 01:03 PM PDT Moonset
Thu -- 03:50 PM PDT 1.20 knots Max Flood
Thu -- 07:22 PM PDT -0.00 knots Slack
Thu -- 07:51 PM PDT Sunset
Thu -- 10:12 PM PDT -1.02 knots Max Ebb
Thu -- 11:53 PM PDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Thu -- 12:25 AM PDT 0.00 knots Slack
Thu -- 03:42 AM PDT 1.16 knots Max Flood
Thu -- 06:30 AM PDT Sunrise
Thu -- 07:34 AM PDT -0.00 knots Slack
Thu -- 09:40 AM PDT -0.61 knots Max Ebb
Thu -- 11:56 AM PDT 0.00 knots Slack
Thu -- 01:03 PM PDT Moonset
Thu -- 03:50 PM PDT 1.20 knots Max Flood
Thu -- 07:22 PM PDT -0.00 knots Slack
Thu -- 07:51 PM PDT Sunset
Thu -- 10:12 PM PDT -1.02 knots Max Ebb
Thu -- 11:53 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 | 0.3 | 0.7 | 1.1 | 1.1 | 0.9 | 0.6 | 0.2 | -0.2 | -0.5 | -0.6 | -0.3 | 0 | 0.4 | 0.7 | 1.1 | 1.2 | 1 | 0.6 | 0.2 | -0.3 | -0.8 | -1 | -0.9 |
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 (22,6,7,8)
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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. |