Wednesday, February24, 2021
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Marine Weather and Tides
Cherryland, CA

Version 3.4
NOTICE
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 6:44AMSunset 5:58PM Wednesday February 24, 2021 9:37 AM PST (17:37 UTC) Moonrise 3:12PMMoonset 5:22AM Illumination 95% Phase: Waxing Gibbous; Moon at 13 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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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.
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.


7 Day Forecast for Marine Location Near Cherryland, CA
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location: 37.67, -122.11     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 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

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AAMC1 - 9414750 - Alameda, CA 12 mi49 min 55°F
RTYC1 - 9414523 - Redwood City, CA 12 mi49 min WNW 4.1 G 5.1 54°F 58°F1023.2 hPa
LNDC1 13 mi49 min NNW 7 G 11 55°F 1022.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 15 mi49 min NW 6 G 7
OBXC1 15 mi49 min 52°F 49°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 15 mi49 min NW 5.1 G 6 53°F 1022.7 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 17 mi49 min NNW 5.1 G 6 52°F 1021.6 hPa
PXSC1 18 mi49 min 53°F 50°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi49 min N 5.1 G 9.9 57°F 1022.9 hPa
FTPC1 - 9414290 - San Francisco, CA 21 mi55 min W 1.9 G 4.1 54°F 53°F1022.5 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 24 mi56 min Calm 58°F 1023 hPa
RCMC1 - 9414863 - Richmond, CA 24 mi55 min NW 1.9 G 2.9 54°F 53°F1022.6 hPa
UPBC1 25 mi49 min W 5.1 G 6
MZXC1 - 9415102 - Martinez-Amorco CA 25 mi49 min WSW 4.1 G 5.1 54°F 54°F1022.7 hPa
PCOC1 - 9415144 - Port Chicago, CA 27 mi49 min SSW 2.9 G 6 55°F 54°F1022.5 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 28 mi49 min NW 1.9 G 5.1 59°F 1022.4 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 28 mi49 min SW 8 G 8.9 53°F 1022.4 hPa
CQUC1 28 mi54 min 54°F
46237 - San Francisco Bar, CA (142) 29 mi97 min 52°F8 ft
SFXC1 - San Francisco Bay Reserve, CA 37 mi112 min SE 7 47°F 1022 hPa40°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 39 mi37 min NW 18 G 21 51°F1023.1 hPa (+1.6)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 46 mi37 min NNW 21 G 27 51°F 1023.2 hPa (+1.8)46°F

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hayward, Hayward Air Terminal, CA1 mi43 minN 010.00 miFair54°F37°F53%1023.4 hPa
Oakland, Metro Oakland International Airport, CA6 mi44 minN 010.00 miFair58°F40°F51%1022.7 hPa
San Carlos Airport, CA12 mi49 minVar 310.00 miClear55°F39°F55%1023 hPa
Palo Alto Airport, CA13 mi50 minN 010.00 miClear54°F41°F63%1022.7 hPa
San Francisco, San Francisco International Airport, CA14 mi41 minN 010.00 miA Few Clouds57°F44°F62%1022.5 hPa
Livermore, Livermore Municipal Airport, CA16 mi44 minENE 710.00 miFair61°F18°F19%1022.1 hPa
Mountain View, Moffett Field, CA17 mi47 minVar 59.00 miFair55°F39°F55%1022.7 hPa
Concord, Buchanan Field, CA22 mi44 minN 010.00 miFair54°F35°F49%1021.2 hPa
San Jose, San Jose International Airport, CA23 mi44 minNNW 310.00 miFair54°F40°F59%1022.3 hPa
Half Moon Bay Airport, CA23 mi42 minNNW 103.00 miFair with Haze52°F46°F82%1022.7 hPa

Link to 5 minute data for KHWD

Wind History from HWD (wind in knots)
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W9W7W3CalmCalmNW6CalmCalmCalmSE3E3CalmCalmNE3CalmNE3Calm
1 day ago4S104NE6E6W7W6W6W9NW6W3CalmE5E5E5NE4CalmE3CalmCalmE3CalmCalmCalm
2 days agoW3W5W6W9W9W12W9W14W5CalmCalmCalmCalmCalmCalmNE4CalmNE3SE3E4N5SE8E3N7

Tide / Current Tables for Roberts Landing, 1.3 miles west of, San Francisco Bay, California
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Roberts 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
Sorry tide depth graphs only, please select another station.

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5.95.44.53.73.23.23.956.27.27.475.94.42.81.20.2-0.3-0.20.71.93.44.95.9

Tide / Current Tables for Oakland Airport SW, South San Francisco Bay, California Current
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Oakland 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
Sorry tide depth graphs only, please select another station.

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-0.3-0.4-0.3-0.200.30.40.50.40.2-0.1-0.5-0.8-0.9-0.8-0.6-0.30.10.40.60.70.70.50.2

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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.
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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.