Thursday, February20, 2020
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Marine Weather and Tides
Moss Landing, 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 6:47AMSunset 5:53PM Thursday February 20, 2020 4:58 PM PST (00:58 UTC) Moonrise 5:17AMMoonset 3:13PM Illumination 8% Phase: Waning Crescent; Moon at 27 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- 207 Pm Pst Thu Feb 20 2020
Tonight..S winds around 5 kt, becoming northeast after midnight. Wind waves 1 ft. W swell 3 to 4 ft at 14 seconds and sw around 2 ft at 15 seconds.
Fri..N winds up to 10 kt. Wind waves 1 ft. W swell 3 to 5 ft at 15 seconds and sw around 2 ft at 15 seconds.
Fri night..SW winds up to 10 kt. Wind waves 1 ft. W swell 4 to 6 ft at 15 seconds and sw around 2 ft at 14 seconds. A slight chance of rain.
Sat..W winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 3 to 5 ft at 14 seconds and sw around 2 ft at 14 seconds. A slight chance of rain.
Sat night..W winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 3 to 4 ft at 17 seconds.
Sun..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. W swell 4 to 6 ft at 16 seconds.
Sun night..NW winds 5 to 10 kt. Wind waves 1 to 2 ft. W swell 4 to 6 ft at 15 seconds.
Mon..N winds up to 10 kt. Wind waves 1 ft. W swell 4 to 6 ft.
Tue..N winds up to 10 kt. Wind waves 1 ft. W swell 3 to 5 ft. Locally lower winds and seas across sheltered portions of the bay.
PZZ500 207 Pm Pst Thu Feb 20 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light winds are forecast to continue over the coastal waters tonight. A low pressure system will arrive on the central coast on Friday, bringing with it a slight chance of showers to the waters south of point pinos. Dry weather returns Sunday and Monday. A moderate northwest swell persists through the week along with a light southerly swell.


7 Day Forecast for Marine Location Near Moss Landing, CA
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location: 36.81, -121.76     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 202335 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 335 PM PST Thu Feb 20 2020

SYNOPSIS. Warming temperatures continue through the end of the week as the next system passes to the south. A chance of rain is possible for the Central Coast late Friday into Saturday morning, though accumulations are forecast to be minimal. The Bay Area will see dry conditions and mild temperatures are forecast to continue through next week.

DISCUSSION. as of 03:00 PM PST Thursday . Another dry and mild February day is now well underway with increasing high clouds from the west and slightly warmer temperatures versus this time yesterday. Current observations are generally running with temperatures in the mid 60s near the shorelines up to the low 70s inland, which are about 3-7 degrees above normal.

For tomorrow, 850mb temperatures are forecast to rise by another 1-2C which will directly result in further warming at the surface by an additional 3-7 degrees (F). Consequently, tomorrow will run approximately 6-14 degrees above normal, with shoreline temperatures forecast in the mid to low 70s and up to the mid 70s farther inland. High clouds will lower and thicken later in the day and the farther southward a location is.

The primary weather system in the region is a 553dm 500mb low pressure system approximately 500 miles WSW of San Francisco. Moist southwesterly flow on the southeastern flank of the low is responsible for todays increasing high clouds. This system has trekked roughly 120 miles southward since this morning which is in line with the varying forecast model trajectories that guide it into Southern California late Friday into early this weekend. Wrap around moisture on the north/eastern periphery of the upper low may bring the first measurable rain of the month for some portions of Santa Cruz, southern Santa Clara, Monterey, and San Benito counties as it slides well to our south of our location and into Southern California. Moderate amount of uncertainty remains on which areas will pick up any area, with the highest certainty for the coastal ranges of Monterey (Big Sur) for picking up at least a hundredth. Elsewhere, areas such as Monterey, Salinas, Hollister, and the Santa Cruz mountains will be looking in the range of 0.01-0.10", while the peaks of Big Sur could see 0.05-0.50" per latest ensemble member output. That said, dry ensemble members remain for all locations, meaning there is still a possibility of the system coming in slightly farther southward, or weaker/drier than anticipated, resulting in less or no precipitation for some/all areas mentioned. Any rain that does fall with this system would be the first for the area this month, aside from any trace amounts accumulated during the morning fog events. Winds should remain light to occasionally breezy with this system.

In the wake of this low passing to our south, a short lived, low amplitude (weak) high pressure will develop over the area later Saturday. This will be the driving factor for the increase in 850mb temperatures previously discussed and will also tighten the pressure gradient, causing locally moderate winds along the coast and through coastal gaps, such as near KSFO from later Saturday and throughout Sunday. A low pressure trough will sweep across the Pacific Northwest late this weekend but will not bring a tangible impact to the local weather. A broader, higher amplitude high pressure system will then develop early next week, pushing 850mb temperatures up to 10-13C from Tuesday through Thursday -- resulting in further dry, mild weather for the region.

AVIATION. as of 3:35 PM PST Thursday . The large surface high pressure over the Rockies is dominating our weather pattern. Winds are offshore in the lower levels with a light onshore afternoon seabreeze at the surface. An upper level low west of the area is spreading in high clouds. Mid and high clouds will increase on Friday as the low moves towards southern California.

Vicinity of KSFO . VFR. Northwest winds around 5 kt becoming northeast late tonight.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR. Afternoon seabreeze 5-10 kt becoming offshore late tonight.

MARINE. as of 03:22 PM PST Thursday . Light winds are forecast to continue over the coastal waters tonight. A low pressure system will arrive on the Central Coast on Friday, bringing with it a slight chance of showers to the waters south of Point Pinos. Dry weather returns Sunday and Monday. A moderate northwest swell persists through the week along with a light southerly swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. None.

PUBLIC FORECAST: DRP AVIATION: W Pi MARINE: Sims

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ELXC1 - Elkhorn Slough Reserve, CA 1 mi73 min NW 6 61°F 1017 hPa45°F
46092 - MBM1 15 mi41 min WNW 12 55°F 54°F1017.6 hPa (-1.6)
46240 - Cabrillo Point, Monterey Bay, CA (158) 15 mi28 min 56°F2 ft
MEYC1 16 mi82 min NW 9.9 G 12 56°F 57°F1018.2 hPa
46114 - West Monterey Bay, CA 32 mi28 min 55°F3 ft
46042 - MONTEREY - 27NM West of Monterey Bay, CA 34 mi28 min NW 12 G 12 55°F 55°F1018.6 hPa48°F
46239 - Point Sur, CA (157) 37 mi28 min 55°F4 ft

Wind History for Monterey, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA9 mi65 minW 610.00 miFair65°F39°F39%1017.8 hPa
Salinas, Salinas Municipal Airport, CA13 mi65 minWNW 1110.00 miFair64°F41°F43%1018.5 hPa
Monterey Regional Airport, CA16 mi64 minN 410.00 miFair59°F46°F64%1019.8 hPa
Hollister, CA, CA19 mi63 minNNW 410.00 miFair72°F35°F27%1017.6 hPa

Link to 5 minute data for KWVI

Wind History from WVI (wind in knots)
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Last 24hrS4S5S3E4NE3CalmN3CalmNE3CalmCalmCalmN5NW3CalmCalmCalmE4CalmCalmS4CalmSW7W6
1 day agoW4CalmCalmCalmN4N4N3N5N4CalmN3N4N4CalmCalmNW3CalmS3CalmCalmCalmW8W5W4
2 days agoSW4SE3--4N4N5N7N4N4CalmN3CalmNW3CalmCalmCalmSE3Calm3S4SW6W7W7W5

Tide / Current Tables for Pacific Mariculture Dock, Elkhorn Slough, Monterey Bay, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Point Pinos, California Current
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Point Pinos
Click for Map
Thu -- 01:21 AM PST     -0.40 knots Max Ebb
Thu -- 04:09 AM PST     0.00 knots Slack
Thu -- 05:16 AM PST     Moonrise
Thu -- 06:50 AM PST     Sunrise
Thu -- 07:04 AM PST     0.53 knots Max Flood
Thu -- 09:43 AM PST     -0.00 knots Slack
Thu -- 01:09 PM PST     -0.91 knots Max Ebb
Thu -- 03:14 PM PST     Moonset
Thu -- 05:01 PM PST     0.00 knots Slack
Thu -- 05:53 PM PST     Sunset
Thu -- 08:14 PM PST     0.76 knots Max Flood
Thu -- 11:17 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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-0.3-0.4-0.4-0.3-00.20.40.50.50.3-0.1-0.5-0.8-0.9-0.9-0.7-0.4-00.40.60.80.70.50.1

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 (19,4,5,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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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.