Wednesday, August5, 2020
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Marine Weather and Tides
Cherryland, CA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:14AMSunset 8:13PM Wednesday August 5, 2020 5:50 PM PDT (00:50 UTC) Moonrise 8:50PMMoonset 7:07AM Illumination 96% Phase: Waning Gibbous; Moon at 17 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- 201 Pm Pdt Wed Aug 5 2020
Rest of today..W winds 5 to 15 kt.
Tonight..SW winds 5 to 15 kt.
Thu..W winds 10 to 20 kt with gusts up to 30 kt.
Thu night..W winds 10 to 20 kt with gusts up to 30 kt.
Fri..NW winds 5 to 15 kt.
Fri night..NW winds up to 10 kt.
Sat..W winds 10 to 20 kt.
Sun..W winds 5 to 15 kt.
PZZ500 201 Pm Pdt Wed Aug 5 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate to breezy northwest winds will continue across the waters through late this week. Winds will ease slightly over the southern outer waters and parts of the coastline tomorrow with gusty conditions persisting elsewhere. Breezy winds are expected into early this evening over the san francisco bay around the golden gate gap and northward through the delta. These winds will generate steep fresh swells resulting in locally hazardous seas, especially for smaller vessels. A couple of light southerly swells will continue into the weekend.


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 052353 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 453 PM PDT Wed Aug 5 2020

SYNOPSIS. Unseasonably cool conditions will persist through Thursday as temperatures slowly adjust toward near normal for the weekend. Drizzle or light rain is possible in coastal regions Thursday morning.

DISCUSSION. as of 02:21 PM PDT Wednesday . Afternoon satellite continues to show a deep marine layer impacting the the Bay Area. Breezy northwest winds are pushing this in the coast in most areas with some dry slots in the lee of prominent points such as Point Arena and Pigeon Point. These dry slots are keeping areas like coastal Sonoma and the Santa Cruz/Aptos area clear. As the winds ease overnight clouds should make a return into the Bay. However, the upper trough slowly creeping across the region may provide enough vertical mixing to clear out the region earlier on Thursday. This will be the challenge for the next 24 hours. For now the forecast indicates that we'll see a marine layer like this morning, but may need to show more clearing earlier. With the trough coming through, models are indicating the possibility of some light rain/drizzle in some coastal areas. This should be confined to the coastal areas, but with the deepening marine layer it may reach a little way inland. By Friday the upper trough will be shifting off to the east, allowing for a ridge to build over the region. This should compress the marine layer a bit causing a earlier burn off and slower onset. This means more daylight while the ridge is in place which yields a warming pattern. This pattern should hold through Saturday. Sunday will be a bit of a transition day as the ridge flattens out and as a trough over the Pacific Northwest begins to slowly dig southward once again. So as we get back into early next week, expect temps to drop to a few degrees below normal.

All told, the marine layer will play a significant role for the next day or two. Temps will slowly rise to near normal for the first part of the weekend with a slow slip to below normal for early next week.

As for winds, look for continued breezy conditions for the next day or two. As the ridge steps in and then the pattern flattens, winds should be easing quite a bit.

AVIATION. As of 04:52 PM PDT Wednesday . for 00z TAFs. A mix of MVFR to VFR conditions with stratus clouds streaming into the San Francisco Bay as well as the Monterey Bay. Cloud cover will thicken with cigs lowering to MVFR/IFR overnight. The marine layer is deep, around 3000 feet, so there remains another chance for light drizzle in the early morning hours, but again mostly closer to the coast. Clouds will have another late clearing on Thursday at most terminals after 18z. Winds remain breezy and onshore with several terminals having stronger gusts. This pattern will continue into Thursday with strongest winds at KSFO.

Vicinity of KSFO . MVFR. Winds remain onshore with stronger gusts from 25-30 kt. Low confidence in gusts exceeding 30 kts as they are expected to diminish overnight. MVFR ceilings will persist through the night and dissipate after 18z. VFR Thursday afternoon with strong onshore winds.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals..MVFR. Onshore winds have increased featuring some stronger gusts. Cigs will lower for IFR conditions overnight as winds decrease. Low confidence in chances for LIFR at KMRY. Cigs will lift after 18z, but cloud cover will remain around the terminals for MVFR conditions. Winds will increase Thursday afternoon with occasional stronger gusts.

MARINE. as of 02:01 PM PDT Wednesday . Moderate to breezy northwest winds will continue across the waters through late this week. Winds will ease slightly over the southern outer waters and parts of the coastline tomorrow with gusty conditions persisting elsewhere. Breezy winds are expected into early this evening over the San Francisco Bay around the Golden Gate Gap and northward through the Delta. These winds will generate steep fresh swells resulting in locally hazardous seas, especially for smaller vessels. A couple of light southerly swells will continue into the weekend.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Reyes to Pigeon Pt 0-10 nm SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm until 3 AM SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm from 9 PM SCA . SF Bay until 9 PM



PUBLIC FORECAST: BFG AVIATION: DK MARINE: AS

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AAMC1 - 9414750 - Alameda, CA 12 mi57 min WSW 13 G 18 62°F 69°F1014.2 hPa
RTYC1 - 9414523 - Redwood City, CA 12 mi57 min WSW 9.9 G 17 63°F 73°F1015.6 hPa
LNDC1 13 mi57 min WSW 12 G 19 62°F 1014 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 15 mi57 min WSW 17 G 20
OBXC1 15 mi57 min 62°F 59°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 15 mi57 min W 14 G 21 62°F 1013.6 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 17 mi57 min WSW 13 G 21 62°F 1012.6 hPa
PXSC1 18 mi57 min 62°F 58°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi57 min SW 14 G 18 63°F 1013.2 hPa
FTPC1 - 9414290 - San Francisco, CA 21 mi57 min WSW 9.9 G 16 60°F 63°F1013.8 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 24 mi47 min SE 4.1 58°F 1015 hPa
RCMC1 - 9414863 - Richmond, CA 24 mi57 min SSW 5.1 G 8.9 66°F 66°F1012.7 hPa
UPBC1 25 mi57 min SSW 15 G 20
MZXC1 - 9415102 - Martinez-Amorco CA 25 mi57 min SSW 13 G 18 66°F 69°F1012.4 hPa
PCOC1 - 9415144 - Port Chicago, CA 27 mi57 min S 13 G 20 68°F 70°F1011.7 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 28 mi57 min WSW 15 G 20 69°F 1011.3 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 28 mi57 min W 13 G 17 67°F 1012.2 hPa
46237 - San Francisco Bar, CA (142) 29 mi51 min 58°F4 ft
SFXC1 - San Francisco Bay Reserve, CA 37 mi66 min WSW 12
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 39 mi31 min WSW 12 G 16 56°F 54°F1014.4 hPa54°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 46 mi31 min WNW 12 G 14 60°F 1015.6 hPa56°F

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hayward, Hayward Air Terminal, CA1 mi57 minWSW 1310.00 miOvercast65°F54°F68%1015.5 hPa
Oakland, Metro Oakland International Airport, CA6 mi58 minWSW 1610.00 miOvercast66°F55°F68%1014.4 hPa
San Carlos Airport, CA12 mi1.9 hrsSW 910.00 miOvercast64°F55°F73%1015.6 hPa
Palo Alto Airport, CA13 mi64 minW 11 G 1810.00 miMostly Cloudy64°F55°F73%1015.2 hPa
San Francisco, San Francisco International Airport, CA14 mi55 minW 16 G 3110.00 miOvercast65°F54°F68%1014.3 hPa
Livermore, Livermore Municipal Airport, CA16 mi58 minSW 1210.00 miOvercast64°F54°F70%1014.1 hPa
Concord, Buchanan Field, CA22 mi58 minSSW 21 G 2610.00 miFair and Breezy70°F55°F59%1011.2 hPa
San Jose, San Jose International Airport, CA23 mi58 minWNW 1210.00 miMostly Cloudy67°F53°F61%1014.9 hPa
Half Moon Bay Airport, CA23 mi56 minW 107.00 miOvercast63°F55°F77%1015.6 hPa

Link to 5 minute data for KHWD

Wind History from HWD (wind in knots)
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1 day agoW12NW10W6SW8SW7W7SW9W9W6W7SW5W8W4SW3W5W4W5W7W10NW16W15W14W11W11
2 days agoW8W5CalmCalmNE3CalmS6SW6CalmCalmSW4W6NE3Calm3SW54CalmSW5W7W13W9W12W10

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 -- 01:37 AM PDT     7.56 feet High Tide
Wed -- 06:16 AM PDT     Sunrise
Wed -- 08:07 AM PDT     Moonset
Wed -- 08:51 AM PDT     -0.27 feet Low Tide
Wed -- 03:23 PM PDT     6.52 feet High Tide
Wed -- 08:12 PM PDT     Sunset
Wed -- 08:57 PM PDT     2.64 feet Low Tide
Wed -- 09:50 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.57.47.56.95.74.12.30.9-0-0.30.31.42.94.55.86.56.45.74.73.72.92.63.14.1

Tide / Current Tables for Oakland Airport SW, South San Francisco Bay, California Current
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Oakland Airport SW
Click for Map
Wed -- 01:40 AM PDT     -0.01 knots Slack
Wed -- 04:43 AM PDT     -0.96 knots Max Ebb
Wed -- 06:16 AM PDT     Sunrise
Wed -- 08:07 AM PDT     Moonset
Wed -- 08:27 AM PDT     0.01 knots Slack
Wed -- 11:44 AM PDT     0.76 knots Max Flood
Wed -- 03:01 PM PDT     -0.01 knots Slack
Wed -- 05:15 PM PDT     -0.54 knots Max Ebb
Wed -- 08:12 PM PDT     Sunset
Wed -- 08:25 PM PDT     0.00 knots Slack
Wed -- 09:50 PM PDT     Moonrise
Wed -- 11:28 PM PDT     0.56 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.2-0.1-0.6-0.9-1-0.8-0.6-0.20.20.50.70.80.60.40-0.4-0.5-0.5-0.3-0.10.20.40.5

Weather Map
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wmap_P
GEOS 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 (20,4,5,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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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.