|
Marine Weather and Tides
Version 3.4 |
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17. 1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support. |
| Sunrise 6:44AM | Sunset 5:58PM | Wednesday February 24, 2021 9:37 AM PST (17:37 UTC) | Moonrise 3:12PM | Moonset 5:22AM | Illumination 95% |  |
PZZ531 San Francisco Bay South Of The Bay Bridge- 229 Am Pst Wed Feb 24 2021
.small craft advisory in effect from this afternoon through late tonight...
Today..NW winds 5 to 15 kt. Gusts up to 25 kt this afternoon.
Tonight..N winds 10 to 20 kt with gusts up to 30 kt.
Thu..W winds up to 10 kt.
Thu night..NW winds up to 10 kt.
Fri..NW winds 5 to 15 kt.
Fri night..NW winds 5 to 15 kt.
Sat..NW winds 10 to 20 kt with gusts up to 25 kt.
Sun..NW winds 5 to 10 kt.
.small craft advisory in effect from this afternoon through late tonight...
Today..NW winds 5 to 15 kt. Gusts up to 25 kt this afternoon.
Tonight..N winds 10 to 20 kt with gusts up to 30 kt.
Thu..W winds up to 10 kt.
Thu night..NW winds up to 10 kt.
Fri..NW winds 5 to 15 kt.
Fri night..NW winds 5 to 15 kt.
Sat..NW winds 10 to 20 kt with gusts up to 25 kt.
Sun..NW winds 5 to 10 kt.
PZZ500 229 Am Pst Wed Feb 24 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gusty north winds today and this evening then ease early Thursday with gale force gusts in the northern outer waters. Gusty northerly winds will redevelop late Thursday into Friday. These winds will generate steep fresh swell and bring hazardous conditions for smaller vessels. A moderate northwest swell at around 13 to 15 seconds will continue through the waters over the coming days.
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gusty north winds today and this evening then ease early Thursday with gale force gusts in the northern outer waters. Gusty northerly winds will redevelop late Thursday into Friday. These winds will generate steep fresh swell and bring hazardous conditions for smaller vessels. A moderate northwest swell at around 13 to 15 seconds will continue through the waters over the coming days.
7 Day Forecast for Marine Location Near Cherryland, CA
Hourly EDIT Help
location: 37.67, -122.11 debug
Area Discussion for - San Francisco/Monterey Bay Area, CA
(on/off) Help NOTE: mouseover dotted underlined text for definitionFXUS66 KMTR 241639 AFDMTR
Area Forecast Discussion National Weather Service San Francisco Bay Area 839 AM PST Wed Feb 24 2021
SYNOPSIS. Dry with gradual cooling trend and clear skies into the weekend. Offshore flow will strengthen today. Winds aloft will increase with the chance for them to mix down to the surface. Our Wind Advisory will be in effect later this morning for the North and East Bay hills, Santa Cruz mountains, and the East Bay valleys. Offshore flow will persist Thursday and Friday, but at weaker speeds. There is a chance for offshore winds to increase again on Saturday.
DISCUSSION. as of 08:39 AM PST Wednesday . Mostly clear skies led to a picturesque sunrise this morning. The clear skies are due to the prevailing offshore flow. The exceptions are a patch of low clouds/fog near Monterey Bay and some patchy fog in the North Bay. Speaking of offshore flow, it's weaker than yesterday morning, but still breezy to gusty in the hills. The highest peaks in the North and East Bay are still in excess of 40 mph. Lower elevations are a different story where winds are much less and in many spots are near calm. The clear skies and calm winds resulted in some chilly morning temperatures with the coldest interior spots hitting the freezing mark.
For the rest of today, a Wind Advisory kicks in this morning and will remain through this afternoon and overnight. Peak offshore flow is still on track to be this afternoon/early this evening. Skies will remain clear, but temperatures will be cooler than yesterday. Highs are forecast to reach mid 60s to mid 70s.
No update needed .
PREV DISCUSSION. as of 03:57 AM PST Wednesday . Clear skies overnight with breezy wind gusts in some areas ranging 15-30 mph. Temperatures at this hour are generally between 40-50 degrees and about 2-5 degrees cooler than 24 hours ago. Expect the cooling trend to continue as several models showed the 850 mb airmass cooling from around 12 degrees C yesterday afternoon to about 8-9 degrees C this afternoon. It'll still be a pleasantly warm day today, though not as hot as it got yesterday. Despite the gradual cooling this week, temperatures will still be comfortable with daytime highs in the mid 60s to mid 70s today becoming upper 50s to mid 60s by Saturday. The coolest morning should be Thursday where coastal areas will have temperatures in the low to mid 40s and the inland valleys will see temperatures in the low to mid 30s.
Now let's dig into the winds . Current offshore gradient from SFO- WMC isn't too impressive right now with only a 2 mb difference, however, we expect that to increase as the day progresses. The NAM model indicates the offshore gradient for SFO- WMC will be much stronger tonight at around a 12 mb difference. This is reflected in our forecast with the strongest winds generally occurring between 00-06Z or 4-10 pm local time. Our Wind Advisory will be in effect at 10 am this morning for the North and East Bay hills, Santa Cruz mountains, and the East Bay valleys. After 10 pm, the offshore gradient will continue and strong gusts are forecast to persist in the higher terrain of the North & East Bay hills along with the Santa Cruz Mountains, but East Bay Valley winds should weaken. Thus, the Wind Advisory for the East Bay valleys is through 10 pm tonight, but it will continue for the higher terrain until 4 am on Thursday. Main impact from the enhanced winds will be the possibility of downed branches and trees coupled with the potential for a few power outages. Don't forget to secure any loose outdoor objects around the house. Offshore flow will continue through Friday, but winds will be weaker. Could see offshore winds increase again on Saturday and we'll be monitoring trends in the forecast models to see if we'll need to issue another wind advisory for portions of our CWA.
The dominant high pressure system over the Eastern Pacific will weaken and get pushed westward as a storm system moves into the Pacific NW on Thursday. Unfortunately, it doesn't look like any of the rain will make it south enough to reach our region. Though our NBM model indicated a slight chance of rain over the weekend, a look at the ECMWF ensembles showed that only 11 out of 50 members had light rain for our CWA. The GFS ensembles were even more pessimistic with only 1 of 30 members indicating rain in our area. Thus, we kept the forecast dry through the weekend.
AVIATION. as of 4:15 AM PST Wednesday . For the 12Z TAFs. Predominately VFR with dry offshore flow through the period. Low level wind shear of 25-40kt at 500-2000 feet possible for terminals on the lee side of ridges through this morning and again this evening/tonight, see specific TAFs. Otherwise, patchy LIFR stratus along the southern Monterey Bay (TEMPO BKN003 at KMRY) with breezy to occasionally gusty northerly winds midday.
Vicinity of KSFO . VFR. Light sfc winds with 30kt low level wind shear through this morning. Winds turn breezy out of the north during the afternoon. LLWS returns this evening and tonight.
SFO Bridge Approach . Similar to KSFO.
Monterey Bay Terminals . VFR. Patchy stratus along the immediate coast will bring TEMPO LIFR cigs through sunrise for Moss Landing through Carmel area incl KMRY.
MARINE. as of 04:03 AM PST Wednesday . Gusty north winds today and this evening then ease early Thursday with gale force gusts in the northern outer waters. Gusty northerly winds will redevelop late Thursday into Friday. These winds will generate steep fresh swell and bring hazardous conditions for smaller vessels. A moderate northwest swell at around 13 to 15 seconds will continue through the waters over the coming days.
MTR WATCHES/WARNINGS/ADVISORIES. Tday. Wind Advisory . CAZ507-511-512 Wind Advisory . CAZ510 SCA . Pt Reyes to Pigeon Pt 0-10 nm SCA . Pigeon Pt to Pt Pinos 0-10 nm GLW . Pt Arena to Pigeon Pt 10-60 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm SCA . Pt Arena to Pt Reyes 0-10 nm SCA . SF Bay from 1 PM
PUBLIC FORECAST: MM/Bingaman AVIATION: DRP MARINE: DRP
Visit us at www.weather.gov/sanfrancisco
Follow us on Facebook, Twitter, and YouTube at: www.facebook.com/nwsbayarea www.twitter.com/nwsbayarea www.youtube.com/nwsbayarea
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| 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 | 8 AM | 9 AM | |
| Last 24hr | N G15 | N G17 | N G18 | N G17 | N G18 | N G17 | W | W | W G7 | NW | N | W | NW | W | W | W | NW | N G9 | N G9 | W | W | N | NW G7 | NW G6 |
| 1 day ago | NW | W | W | NE G8 | W G9 | W | W | W | W | NW | NW | N | N | N | -- | E | W | NW | W | NW | -- | N | N G8 | N G11 |
| 2 days ago | N | W | NW | W | W | W | W G13 | W G10 | NW | S G4 | N | NE | NE | NE | E | E | E | SE G5 | W G5 | N | W | W G7 | E G4 | 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 |
| Hayward, Hayward Air Terminal, CA | 1 mi | 43 min | N 0 | 10.00 mi | Fair | 54°F | 37°F | 53% | 1023.4 hPa |
| Oakland, Metro Oakland International Airport, CA | 6 mi | 44 min | N 0 | 10.00 mi | Fair | 58°F | 40°F | 51% | 1022.7 hPa |
| San Carlos Airport, CA | 12 mi | 49 min | Var 3 | 10.00 mi | Clear | 55°F | 39°F | 55% | 1023 hPa |
| Palo Alto Airport, CA | 13 mi | 50 min | N 0 | 10.00 mi | Clear | 54°F | 41°F | 63% | 1022.7 hPa |
| San Francisco, San Francisco International Airport, CA | 14 mi | 41 min | N 0 | 10.00 mi | A Few Clouds | 57°F | 44°F | 62% | 1022.5 hPa |
| Livermore, Livermore Municipal Airport, CA | 16 mi | 44 min | ENE 7 | 10.00 mi | Fair | 61°F | 18°F | 19% | 1022.1 hPa |
| Mountain View, Moffett Field, CA | 17 mi | 47 min | Var 5 | 9.00 mi | Fair | 55°F | 39°F | 55% | 1022.7 hPa |
| Concord, Buchanan Field, CA | 22 mi | 44 min | N 0 | 10.00 mi | Fair | 54°F | 35°F | 49% | 1021.2 hPa |
| San Jose, San Jose International Airport, CA | 23 mi | 44 min | NNW 3 | 10.00 mi | Fair | 54°F | 40°F | 59% | 1022.3 hPa |
| Half Moon Bay Airport, CA | 23 mi | 42 min | NNW 10 | 3.00 mi | Fair with Haze | 52°F | 46°F | 82% | 1022.7 hPa |
Link to 5 minute data for KHWD
Wind History from HWD (wind in knots)
| 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 | 8 AM | 9 AM | |
| Last 24hr | SW | SW | SW | SW | NW | W | N G14 | W | W | W | Calm | Calm | NW | Calm | Calm | Calm | SE | E | Calm | Calm | NE | Calm | NE | Calm |
| 1 day ago | S | NE | E | W | W | W | W | NW | W | Calm | E | E | E | NE | Calm | E | Calm | Calm | E | Calm | Calm | Calm | ||
| 2 days ago | W | W | W | W | W | W | W | W | W | Calm | Calm | Calm | Calm | Calm | Calm | NE | Calm | NE | SE | E | N | SE | E | N |
Tide / Current Tables for Roberts Landing, 1.3 miles west of, San Francisco Bay, California
EDIT Weekend mode (on/off) (on/off) Help One Week of DataRoberts Landing
Click for Map
Wed -- 04:28 AM PST 3.12 feet Low Tide
Wed -- 05:22 AM PST Moonset
Wed -- 06:46 AM PST Sunrise
Wed -- 09:45 AM PST 7.44 feet High Tide
Wed -- 03:12 PM PST Moonrise
Wed -- 05:19 PM PST -0.33 feet Low Tide
Wed -- 05:57 PM PST Sunset
Wed -- 11:55 PM PST 6.25 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 04:28 AM PST 3.12 feet Low Tide
Wed -- 05:22 AM PST Moonset
Wed -- 06:46 AM PST Sunrise
Wed -- 09:45 AM PST 7.44 feet High Tide
Wed -- 03:12 PM PST Moonrise
Wed -- 05:19 PM PST -0.33 feet Low Tide
Wed -- 05:57 PM PST Sunset
Wed -- 11:55 PM PST 6.25 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 |
| 5.9 | 5.4 | 4.5 | 3.7 | 3.2 | 3.2 | 3.9 | 5 | 6.2 | 7.2 | 7.4 | 7 | 5.9 | 4.4 | 2.8 | 1.2 | 0.2 | -0.3 | -0.2 | 0.7 | 1.9 | 3.4 | 4.9 | 5.9 |
Tide / Current Tables for Oakland Airport SW, South San Francisco Bay, California Current
EDIT (on/off) Help One Week of DataOakland Airport SW
Click for Map
Wed -- 12:50 AM PST -0.39 knots Max Ebb
Wed -- 03:52 AM PST 0.00 knots Slack
Wed -- 05:22 AM PST Moonset
Wed -- 06:46 AM PST Sunrise
Wed -- 06:58 AM PST 0.50 knots Max Flood
Wed -- 09:47 AM PST -0.00 knots Slack
Wed -- 12:58 PM PST -0.93 knots Max Ebb
Wed -- 03:12 PM PST Moonrise
Wed -- 04:46 PM PST 0.00 knots Slack
Wed -- 05:57 PM PST Sunset
Wed -- 08:06 PM PST 0.73 knots Max Flood
Wed -- 11:24 PM PST -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 12:50 AM PST -0.39 knots Max Ebb
Wed -- 03:52 AM PST 0.00 knots Slack
Wed -- 05:22 AM PST Moonset
Wed -- 06:46 AM PST Sunrise
Wed -- 06:58 AM PST 0.50 knots Max Flood
Wed -- 09:47 AM PST -0.00 knots Slack
Wed -- 12:58 PM PST -0.93 knots Max Ebb
Wed -- 03:12 PM PST Moonrise
Wed -- 04:46 PM PST 0.00 knots Slack
Wed -- 05:57 PM PST Sunset
Wed -- 08:06 PM PST 0.73 knots Max Flood
Wed -- 11:24 PM PST -0.00 knots Slack
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 |
| -0.3 | -0.4 | -0.3 | -0.2 | 0 | 0.3 | 0.4 | 0.5 | 0.4 | 0.2 | -0.1 | -0.5 | -0.8 | -0.9 | -0.8 | -0.6 | -0.3 | 0.1 | 0.4 | 0.6 | 0.7 | 0.7 | 0.5 | 0.2 |
Weather Map
(on/off) Help Weather Map
GEOS Local Image of CentralWestCoast EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
Link to Loop
Other links: GEOS-West Contential US Full GOES-East
Ground Weather Radar Station
|
Cookie Policy: This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser. Privacy Policy: I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. Google supplies the ads on this site. Because I do not track who you are, I cannot customize how these ads are served. They may be personalized to improve the ad experience. If you do not want personalized ads, please adjust the settings on the Google site HERE. NOTE: The best I can determine, this site is not subject to CCPA but I am doing my best to comply anyway. 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 numerous 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. |