Sunday, April18, 2021
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Marine Weather and Tides
Moraga, 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 6:26AMSunset 7:48PM Sunday April 18, 2021 2:02 PM PDT (21:02 UTC) Moonrise 9:44AMMoonset 12:16AM Illumination 44% Phase: First Quarter Moon; Moon at 7 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- 843 Am Pdt Sun Apr 18 2021
Today..W winds around 5 kt, increasing to 10 to 20 kt with gusts up to 25 kt this afternoon.
Tonight..W winds 10 to 20 kt with gusts up to 25 kt.
Mon..W winds 5 to 15 kt.
Mon night..W winds 10 to 20 kt with gusts up to 25 kt.
Tue..W winds 10 to 20 kt with gusts up to 25 kt.
Tue night..SW winds 5 to 15 kt.
Wed..W winds 5 to 15 kt.
Thu..W winds 5 to 15 kt.
PZZ500 843 Am Pdt Sun Apr 18 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Expect winds to gradually increase this afternoon and evening. Winds will then pick up further on Monday as a disturbance moves down from the pacific northwest into northern california. NEar gale force gusts may be possible over the northern waters by Tuesday morning. Elevated winds will persist through mid week. These winds will produce steep wind waves creating hazardous seas conditions, particularly for smaller vessels. Moderate northwest swell through the period along with a lighter longer period southerly swell.


7 Day Forecast for Marine Location Near Moraga, CA
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location: 37.8, -122.12     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 182053 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 153 PM PDT Sun Apr 18 2021

SYNOPSIS. Interior temperatures will be well above normal today as ridging aloft continues. Slight cooling begins Monday, mainly in coastal areas. More widespread cooling is forecast for Tuesday as temperatures return to seasonal averages. Dry conditions persist through Friday with slight chances of rain next weekend.

DISCUSSION. as of 01:50 PM PDT Sunday . Today is a great example of weather at the coast vs weather across the interior. The shallow marine layer from this morning did erode from the interior spots, but it continues to persist at the coast. Ample insolation has led to a nice warm up across the interior with afternoon temperatures in the 70s and 80s. Max temperatures will likely top out 10-15 degrees above normal for this time year. At the coast is a different story where temperatures are still struggling to reach 60 degrees. In fact, the temperatures sensors on Pt Reyes are barely in the 50s BRRRR. definitely a jacket day at the coast. A few coastal spots may come up a few degrees short of the forecasted high temperature.

For tonight, the amplified ridge overhead will begin to weaken and shift eastward. The shallow marine layer lingering at the coast will move inland, likely farther inland the last night. Patchy fog will also be possible given the shallow nature.

To kick off the work week, morning clouds to start, but afternoon sunshine away from the coast. Temperatures away from the coast will still be above normal, but a little cooler than Sunday's high temps. Coastal locations will still be cool with lingering clouds.

The ridge flattens even more and focus begins to shift northward as an upper low develops off the PacNW Coast. This low will deepen more and beeline it for CA Tuesday into Wednesday. Latest guidance suggest enough moisture and instability will be present to generate a few showers and maybe a thunderstorm across portions of NorCal. The question is, any showers for the Bay Area? Hi-res model develop precip of the Yolla-Bolly Mts of Lake Cty, but they quickly fall apart before reaching the North Bay. In other words, there is an outside chance for N Bay showers, but it is low. Forecast is dry for now. Another upper low sweeps across the region on Wednesday into Thursday, but this system looks mostly dry as well. Regardless of precip the passing upper low will bring widespread cooling to the region.

Temperatures rebound a little by Friday into next weekend thanks to some ridging overhead. A more notable pattern change is still being advertise in the extended as an decent low pressure system drops in from the Gulf of Alaska. Deterministic and ensemble guidance have been honing in on increasing chances for precip next Sunday into the following week. Details will likely change between now and then, but at least there is rain chances in the forecast.

AVIATION. As of 11:30 AM PDT Sunday . For the 18Z TAFs. VFR at most all sites. The marine layer is hugging the coast, but will start to mix out as stronger winds build in over the waters this afternoon. Onshore winds will be lighter for the inland terminals, and mildly breezy for the coastal terminals this afternoon with more moderate winds at KSFO around 00Z. Skies will be SKC-FEW250 this afternoon and evening. The marine layer will return tonight around 08-10Z. KMRY/KSNS will see SCT008 start to advect inland around 03Z, reaching MVFR/IFR conditions around 08Z. Higher confidence in most sites returning to VFR by 17Z Monday.

Vicinity of KSFO . VFR with some low clouds along the coast west of the airport. Onshore winds will increase this afternoon to around 15-20 kt. Models and guidance show the potential for low clouds to move further inland late tonight, brining MVFR conditions from 10-16Z Monday morning. Winds will become more breezy Monday afternoon, with higher chances of G20-25kts.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR conditions prevailing through this evening. Low clouds returning tonight will give MVFR/IFR conditions to KMRY/KSNS from 08-16Z. Lower chance for vis drops <1SM or +FG like was seen this morning. Light winds this morning increasing and turning onshore this afternoon. Onshore winds will become breezy Monday afternoon.

MARINE. as of 10:47 AM PDT Sunday . Expect winds to gradually increase this afternoon and evening. Winds will then pick up further on Monday as a disturbance moves down from the Pacific Northwest into northern California. Near gale force gusts may be possible over the northern waters by Tuesday morning. Elevated winds will persist through mid week. These winds will produce steep wind waves creating hazardous seas conditions, particularly for smaller vessels. Moderate northwest swell through the period along with a lighter longer period southerly swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pigeon Pt to Pt Pinos 0-10 nm until 3 AM SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm from 6 PM until 3 AM SCA . Pt Reyes to Pigeon Pt 0-10 nm from 9 PM



PUBLIC FORECAST: MM AVIATION: Dhuyvetter MARINE: Dhuyvetter

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LNDC1 9 mi44 min W 4.1 G 6 71°F 1019.5 hPa
AAMC1 - 9414750 - Alameda, CA 10 mi44 min W 6 G 7 66°F 60°F1019.8 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 11 mi44 min WNW 7 G 8.9 60°F 1019.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 11 mi44 min W 7 G 8.9
OBXC1 12 mi44 min 62°F 53°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 14 mi44 min WSW 6 G 8 69°F 1018.7 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 15 mi44 min SSW 8 G 13 58°F 1020 hPa
PXSC1 15 mi44 min 67°F 51°F
UPBC1 16 mi44 min WNW 1.9 G 2.9
MZXC1 - 9415102 - Martinez-Amorco CA 16 mi44 min W 5.1 G 6 76°F 61°F1018.9 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 18 mi51 min N 1.9 66°F 1020 hPa
RCMC1 - 9414863 - Richmond, CA 18 mi50 min S 5.1 G 7 62°F 59°F1019.5 hPa
PCOC1 - 9415144 - Port Chicago, CA 18 mi44 min W 5.1 G 5.1 78°F 61°F1018.6 hPa
FTPC1 - 9414290 - San Francisco, CA 18 mi44 min WSW 18 G 23 50°F 58°F1020.3 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 19 mi44 min W 4.1 G 5.1 71°F 1018.7 hPa
CQUC1 19 mi43 min 60°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 21 mi44 min WNW 4.1 G 6 80°F 1018.4 hPa
RTYC1 - 9414523 - Redwood City, CA 21 mi44 min NNW 8 G 9.9 75°F 1020.2 hPa
46237 - San Francisco Bar, CA (142) 27 mi32 min 55°F4 ft
SFXC1 - San Francisco Bay Reserve, CA 28 mi77 min SW 7 84°F 1019 hPa38°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 38 mi22 min NW 16 G 19 50°F1021.7 hPa
PRYC1 - 9415020 - Point Reyes, CA 47 mi44 min 52°F1021.4 hPa

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oakland, Metro Oakland International Airport, CA9 mi69 minW 610.00 miFair71°F45°F39%1019.6 hPa
Hayward, Hayward Air Terminal, CA10 mi68 minW 510.00 miFair74°F39°F28%1020.3 hPa
Concord, Buchanan Field, CA13 mi69 minN 910.00 miFair85°F25°F11%1017.5 hPa
Livermore, Livermore Municipal Airport, CA17 mi69 minSSW 610.00 miFair80°F26°F14%1018.6 hPa
San Francisco, San Francisco International Airport, CA18 mi66 minN 310.00 miFair73°F49°F43%1019.5 hPa
San Carlos Airport, CA20 mi70 minVar 310.00 miClear77°F37°F24%1020 hPa
Palo Alto Airport, CA22 mi75 minN 810.00 miClear73°F54°F50%1019.6 hPa

Link to 5 minute data for KOAK

Wind History from OAK (wind in knots)
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Last 24hrW13W14W12NW11W9W9W7W4NW6W7W3CalmCalmCalmCalmCalmNE4CalmS3S4SW5W6W6W7
1 day agoW15W15W13W16W15W13W9W11W9W13W11W9W8W9W6W6W6W5W4W4SW6W8W10W13
2 days agoW12W11W12W13W10W12W13W8W12W7W9W8W8NW6NW6--NW6W6W4SW44SW6W11W13

Tide / Current Tables for San Leandro Channel, San Leandro Bay, San Francisco Bay, California
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San Leandro Channel
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Sun -- 01:16 AM PDT     Moonset
Sun -- 04:12 AM PDT     5.74 feet High Tide
Sun -- 06:29 AM PDT     Sunrise
Sun -- 10:44 AM PDT     Moonrise
Sun -- 11:34 AM PDT     0.16 feet Low Tide
Sun -- 07:39 PM PDT     4.55 feet High Tide
Sun -- 07:47 PM PDT     Sunset
Sun -- 11:44 PM PDT     3.36 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.64.14.85.45.75.654.12.91.70.70.20.20.61.222.93.64.24.54.54.23.83.5

Tide / Current Tables for Oakland Harbor High Street Bridge, San Francisco Bay, California Current
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Oakland Harbor High Street Bridge
Click for Map
Sun -- 01:16 AM PDT     Moonset
Sun -- 01:18 AM PDT     0.59 knots Max Flood
Sun -- 03:49 AM PDT     -0.00 knots Slack
Sun -- 06:29 AM PDT     Sunrise
Sun -- 07:30 AM PDT     -1.32 knots Max Ebb
Sun -- 10:43 AM PDT     Moonrise
Sun -- 11:59 AM PDT     0.00 knots Slack
Sun -- 02:49 PM PDT     1.09 knots Max Flood
Sun -- 06:45 PM PDT     -0.00 knots Slack
Sun -- 07:47 PM PDT     Sunset
Sun -- 08:17 PM PDT     -0.45 knots Max Ebb
Sun -- 11:53 PM PDT     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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0.40.60.50.3-0.1-0.4-0.9-1.3-1.3-1-0.7-0.300.611.110.80.4-0.1-0.4-0.4-0.2-0.1

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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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