Wednesday, April21, 2021
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Marine Weather and Tides
Gonzales, 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 6:21AMSunset 7:46PM Wednesday April 21, 2021 6:55 PM PDT (01:55 UTC) Moonrise 12:45PMMoonset 2:27AM Illumination 76% Phase: Waxing Gibbous; Moon at 10 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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PZZ535 Monterey Bay- 206 Pm Pdt Wed Apr 21 2021
Tonight..W winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 4 to 6 ft at 11 seconds.
Thu..W winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 3 to 5 ft at 10 seconds.
Thu night..W winds 5 to 15 kt. Wind waves 1 ft. W swell 3 to 5 ft at 10 seconds.
Fri..W winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 3 to 5 ft at 9 seconds.
Fri night..W winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 2 to 4 ft at 9 seconds and S around 2 ft at 19 seconds.
Sat..SW winds 5 to 15 kt. Wind waves 1 ft. W swell 2 to 3 ft at 9 seconds and sw around 2 ft at 18 seconds.
Sat night..SW winds around 5 kt. Wind waves 1 ft. W swell 2 to 3 ft at 9 seconds and sw around 2 ft at 18 seconds.
Sun..SW winds 5 to 10 kt. Wind waves 1 ft. W swell 3 to 5 ft and sw around 2 ft. Rain likely.
Mon..NW winds 5 to 10 kt. Wind waves 1 to 2 ft. W swell 2 to 3 ft and sw around 2 ft. Locally lower winds and seas across sheltered portions of the bay.
PZZ500 206 Pm Pdt Wed Apr 21 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Buoy observations and Satellite show moderately gusty winds over the outer waters this afternoon, with gale force gusts persisting over the northern waters. These stronger winds are creating hazardous seas for smaller vessels in the most of the outer waters and the coastal waters north of point reyes. A moderate locally generated northwest swell will persist through the end of the week. A building southerly swell will move through the waters this weekend. Chance for rain this coming weekend.


7 Day Forecast for Marine Location Near Gonzales, CA
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location: 36.54, -121.46     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 220009 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 509 PM PDT Wed Apr 21 2021

SYNOPSIS. Mainly dry and seasonable weather conditions will persist through Friday. Cooling will occur on Saturday as onshore flow and cloud cover increases region-wide ahead of an approaching weather system. Widespread rainfall is likely on Sunday into early Monday as a cold front drops southward across the region. Warming and drying trend is then expected beyond Monday.

DISCUSSION. as of 01:57 PM PDT Wednesday . A deep marine layer continues to impact the region this afternoon with low clouds holding along much of the coastline, through the Golden Gate and around the Monterey Bay region. This will hold temperatures in the 50s where cloud cover persist to the 70s across the interior. Expecting typical ebb and flow of low clouds each day through the remainder of the week with only minor day-to-day fluctuations in temperatures.

Onshore flow will then increase on Saturday ahead of an approaching weather system which will result in a region-wide cooling trend and increased cloud cover. Afternoon temperatures on Saturday will range from the upper 50s at the coast to mid 60s inland (only a few locations of the interior Central Coast may approach the lower 70s). However, dry weather will likely persist.

A cold front will then approach from the northwest late Saturday night into Sunday with increased probability of precipitation. The deterministic and ensembles are in good agreement with rainfall becoming more widespread after sunrise on Sunday as deeper moisture advects inland along the southward moving frontal boundary. Steady light to occasionally moderate rain will spread from north to south through the day Sunday with the potential for post frontal rain showers. Thunderstorm potential currently appears to be low, yet will continue to monitor in the coming days as we get a better handle on how much instability will be associated with this passing system.

From the previous forecast discussion: A new drought monitor will be released later this week and the trends will be for more adverse drought impacts across the region and state. This storm will have little overall impact on the long term drought. However, confidence is increasing that most of the Bay Area will see soaking rains Sunday into early Monday. At the very least this will put a pause into the onset of fire season as fuel moisture readings are trending towards historically dry values. So from an impacts stand point this will bring beneficial rains and if the current timing holds up the roadway impacts would be mostly confined to Sunday traffic. For weekend planning, Saturday will be the better day for outdoor plans. Snow levels will be dropping in the Sierra so trans-Sierra passes will be impacted by snow for return travel later Sunday into Monday. All locations will notice cooler daytime highs Sunday into Monday.

Any lingering showers Monday should end early though official forecast will hold onto some low precip chances into Monday evening. Drying and modest warming trend Tuesday into Wednesday of next week as high pressure builds and the main storm track shifts north of the Bay Area.

AVIATION. As of 05:10 PM PDT Wednesday . For the 00Z TAFs. MVFR at the coastal terminals as onshore WNW flow (10-20kts) allows for mid-afternoon marine stratus intrusion with cigs between 1000-1500ft. Stratus have also quickly exited from the San Bruno Gap and begun to track past the Golden Gate and towards the East Bay and North Bay terminals. Have adjusted TAFs to accommodate for the early intrusion across the Bay Area terminals, with the NARRE-TL members capturing the WNW flow and MVFR cigs gradually moving into the STS/APC/SFO/OAK/SJC terminals between 3-9Z, with the interior terminals beginning to approach MVFR closer to 9Z. Widespread MVFR with occasional IFR conditions will continue across the Monterey Bay terminals through the entire TAF period. In terms of winds, will see an uptick in winds after 17Z at most of the terminals as onshore NNW flow picks up along the coast ahead of an approaching high pressure system, further impeding the chance for any breaks at the Monterey Bay terminals tomorrow afternoon.

Vicinity of KSFO . Marine stratus have remained steadily to the north of SFO as they exit the gap and travel past the Golden Gate. Given the westerly component of winds this afternoon, widespread MVFR intrusion southwards into SFO is not expected until after sunset but may see occasional MVFR as winds begin to lessen. OAK and SJC are also expected to go MVFR given the rapid intrusion of stratus into the Bay Shoreline overnight, so have adjusted timing of its arrival on latest TAFs to account for current obs. MVFR conditions at SFO and OAK expected to last through 17Z followed by a quick afternoon break in the clouds and an uptick in winds to 15-20kts through the end of the TAF period.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . MVFR conditions will dominate the terminals through the entire TAF period as onshore flow carries into the evening and is reignited by an approaching high pressure tomorrow afternoon. As such, primary concerns will be the occasional IFR cigs that will develop overnight along the coast and into portions of the Northern Salinas Valley, along with the chance for HZ and BR. Winds will remain light and variable overnight but will pick up to 10-15kts tomorrow afternoon and through the end of the TAF period.

MARINE. as of 04:42 PM PDT Wednesday . Buoy observations and satellite show moderately gusty winds over the outer waters this afternoon, with gale force gusts persisting over the northern waters. These stronger winds are creating hazardous seas for smaller vessels in the most of the outer waters and the coastal waters north of Point Reyes. A moderate locally generated northwest swell will persist through the end of the week. A building southerly swell will move through the waters this weekend. Chance for rain this coming weekend.

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



PUBLIC FORECAST: RGass AVIATION: Diaz MARINE: Dhuyvetter

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MEYC1 23 mi80 min W 6 G 11 51°F 1012.9 hPa
46240 - Cabrillo Point, Monterey Bay, CA (158) 24 mi60 min 53°F5 ft
ELXC1 - Elkhorn Slough Reserve, CA 24 mi71 min W 6 51°F 1015 hPa48°F
MLSC1 - Moss Landing, South Harbor, CA 25 mi40 min 57°F
46092 - MBM1 33 mi110 min WSW 7.8 50°F 52°F1012.5 hPa (-0.7)
46239 - Point Sur, CA (157) 37 mi60 min 52°F10 ft
46269 41 mi56 min 51°F 55°F4 ft
46114 - West Monterey Bay, CA 48 mi90 min 52°F11 ft

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Salinas, Salinas Municipal Airport, CA11 mi63 minWNW 88.00 miOvercast54°F47°F77%1013.3 hPa
Monterey Regional Airport, CA20 mi62 minWSW 810.00 miOvercast54°F47°F77%1014 hPa

Link to 5 minute data for KSNS

Wind History from SNS (wind in knots)
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Last 24hrW14W10W9W8W8W7W8W6W5W5W7W4W3W5CalmW6N3W6NW11NW10NW7W12W11NW8
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2 days agoN11NW10NW6N8NW11NW5NW7NW5NW4NW4W4CalmSW4S3SW3W4NW5NW7W14NW11NW13NW11NW11NW14
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Tide / Current Tables for Monterey, Monterey Harbor, California (3)
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Monterey
Click for Map
Wed -- 12:46 AM PDT     3.03 feet Low Tide
Wed -- 03:29 AM PDT     Moonset
Wed -- 05:42 AM PDT     4.19 feet High Tide
Wed -- 06:25 AM PDT     Sunrise
Wed -- 01:02 PM PDT     0.09 feet Low Tide
Wed -- 01:47 PM PDT     Moonrise
Wed -- 07:47 PM PDT     Sunset
Wed -- 08:12 PM PDT     4.12 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.133.23.53.84.14.23.93.32.51.60.80.30.10.30.81.52.43.23.84.143.73.3

Tide / Current Tables for Monterey, Monterey Harbor, California (2)
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Monterey
Click for Map
Wed -- 12:25 AM PDT     3.26 feet Low Tide
Wed -- 03:29 AM PDT     Moonset
Wed -- 05:39 AM PDT     4.54 feet High Tide
Wed -- 06:25 AM PDT     Sunrise
Wed -- 01:10 PM PDT     0.06 feet Low Tide
Wed -- 01:47 PM PDT     Moonrise
Wed -- 07:47 PM PDT     Sunset
Wed -- 08:21 PM PDT     4.32 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.33.33.53.84.24.54.54.33.72.81.910.30.10.20.71.62.53.444.34.33.93.5

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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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