Friday, July10, 2020
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Marine Weather and Tides
Davenport, 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 5:56AMSunset 8:31PM Friday July 10, 2020 9:02 AM PDT (16:02 UTC) Moonrise 11:16PMMoonset 10:19AM Illumination 73% Phase: Waning Gibbous; Moon at 20 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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PZZ560 Coastal Waters From Pigeon Point To Point Pinos California Out To 10 Nm- 316 Am Pdt Fri Jul 10 2020
.small craft advisory in effect through Saturday afternoon...
Today..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves around 2 ft, increasing to 4 to 5 ft this afternoon. NW swell 3 to 5 ft at 8 seconds and S around 2 ft at 13 seconds.
Tonight..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. NW swell 3 to 5 ft at 8 seconds and S around 2 ft at 13 seconds.
Sat..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. NW swell around 4 ft at 8 seconds and S around 2 ft at 12 seconds.
Sat night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. NW swell 4 to 6 ft at 8 seconds and S around 2 ft at 15 seconds.
Sun..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. NW swell 4 to 6 ft at 9 seconds.
Sun night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. NW swell 5 to 7 ft at 9 seconds.
Mon..W winds up to 10 kt. Wind waves 1 ft. NW swell 4 to 6 ft.
Tue..W to sw winds up to 10 kt. Wind waves 1 ft. NW swell 4 to 6 ft.
PZZ500 316 Am Pdt Fri Jul 10 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A strong surface high pressure system over the eastern pacific will result in gusty northwest winds over the coastal waters at least through Monday. Gusty afternoon and evening west winds will also develop over the bays. Northwest winds will generate steep fresh swell resulting in hazardous seas conditions particularly for smaller vessels.


7 Day Forecast for Marine Location Near Davenport, CA
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location: 37.01, -122.2     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 101201 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 501 AM PDT Fri Jul 10 2020

SYNOPSIS. Very warm and dry conditions will continue inland through the weekend, with Sunday expected to be the warmest day. However, onshore flow will keep areas near the coast mild, and maintain areas of night and morning coastal low clouds and fog. An inland cooling trend is forecast for the first half of next week.

DISCUSSION. As of 3:20 AM PDT Friday . An broad upper level ridge centered over the southwestern U.S. will continue to dominate our weather through the weekend, maintaining very warm to hot conditions inland. A shallow marine layer and persistent onshore surface flow will keep coastal temperatures mild.

Early morning satellite imagery reveals widespread low clouds and fog along the coast from San Mateo County northward, with clear skies from Santa Cruz County southward. Low clouds have been gradually developing southward down the coast, and would expect stratus to form around Monterey Bay by daybreak. Surface pressure gradients are similar to yesterday morning, except slightly more onshore. Meanwhile, the Fort Ord Profiler indicates that the marine layer depth has decreased to less than 1000 feet as the ridge to our southeast strengthens and expands. More widespread coastal low clouds this morning and slightly stronger onshore flow will be offset by a shallower marine layer an a warming airmass aloft. The net result will likely be slightly cooler temperatures near the coast today, and slight warming inland.

Little change is forecast into Saturday, except for continued gradual warming inland. Models continue to indicate that Sunday will be the warmest day. At first glance, this appears dubious as models also forecast a slight weakening of the upper ridge over California on Sunday as a shortwave trough moves into the Pacific Northwest. However, closer examination of model data reveals weaker seabreeze winds on Sunday and also the development of weak offshore flow near the top of the boundary layer for a brief time on Sunday morning, which will bring even drier air into our region and allow for additional warming. Inland valleys will warm from the 90s to around 100 today to the mid 90s to 105 on Sunday. By contrast, areas near the ocean will see high temperatures mostly remain in the 60s to lower 70s. But you won't have to travel very far inland to quickly warm into the 80s and 90s due to the shallow nature of the marine layer.

The very warm to hot daytime temperatures inland over the next three days will be uncomfortable, especially for those sensitive to heat. However, Heat Risk is forecast to remain mostly in the moderate category, with only isolated pockets of high Heat Risk expected. The lack of widespread high Heat Risk is because overnight temperatures are forecast to cool in the 50s and lower 60s, allowing for relief from the heat during the nighttime hours. Only the hills will remain warm at night, where overnight lows forecast to be in the lower 70s.

Hot and dry conditions across inland areas over the next three days will mean continued fire weather concerns, especially in the hills where daytime relative humidity will drop as low as the single digits and overnight humidity recovery will be poor. However, winds are forecast to remain light which will lessen the danger posed by the hot, dry conditions.

The upper ridge is forecast to weaken a bit further over California during the first half of next week, although not enough to result in any significant cooling of the airmass aloft over our region. But both the GFS and ECMWF forecast a cooling trend at the surface from Monday through Wednesday of next week, with high temperatures by Wednesday forecast to be anywhere from 7 to 15 degrees cooler than over the weekend. The reason for this cooling can likely be attributed to the development of southerly low level winds along the coast by Tuesday and especially Wednesday. These southerly winds will allow for more efficient inland transport of marine air and thus cooler temperatures for inland areas. The NBM forecasts more subtle cooling compared to the GFS and ECMWF MOS guidance, so have gone with a compromise temperature forecast between the NBM and MOS guidance in the extended forecast.

AVIATION. As of 5:01 AM PDT Friday . Lower to mid level ridging continues to compress the marine layer to 1,000 feet or lower per recent profiler data. It's VFR except along the immediate coastline it's VLIFR-IFR due to fog and stratus which will tend to thin out during the day then return along the coast tonight and Saturday morning.

Vicinity of KSFO . VFR. Northwest to west wind increasing to 20 to 30 knots in the afternoon and evening. West wind easing to 10 to 15 knots tonight and Saturday morning.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VLIFR-IFR developing this morning, clearing /VFR/ back to the coast by late morning or early afternoon. VLIFR- IFR tonight and Saturday morning.

MARINE. As of 3:16 AM PDT Friday . A strong surface high pressure system over the eastern Pacific will result in gusty northwest winds over the coastal waters at least through Monday. Gusty afternoon and evening west winds will also develop over the bays. Northwest winds will generate steep fresh swell resulting in hazardous seas conditions particularly for smaller vessels.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Reyes to Pigeon Pt 0-10 nm SCA . Pigeon Pt to Pt Pinos 0-10 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm SCA . Mry Bay from 3 PM SCA . SF Bay from 1 PM



PUBLIC FORECAST: Dykema AVIATION/MARINE: Canepa

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46042 - MONTEREY - 27NM West of Monterey Bay, CA 19 mi142 min NW 16 G 19 1016.4 hPa
46092 - MBM1 20 mi43 min NW 12 52°F 55°F1016.8 hPa (+1.7)
46114 - West Monterey Bay, CA 23 mi36 min 54°F7 ft
MLSC1 - Moss Landing, South Harbor, CA 26 mi28 min WSW 1.9 G 6 54°F 1017.3 hPa54°F
ELXC1 - Elkhorn Slough Reserve, CA 28 mi77 min SSE 5.1 55°F 55°F
46240 - Cabrillo Point, Monterey Bay, CA (158) 31 mi96 min 59°F2 ft
MEYC1 32 mi86 min WNW 6 G 8 52°F 64°F1016.9 hPa
RTYC1 - 9414523 - Redwood City, CA 34 mi44 min NNW 1.9 G 2.9 60°F 74°F1017 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 43 mi142 min NNW 16 G 19 53°F 52°F
46239 - Point Sur, CA (157) 46 mi36 min 52°F7 ft

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA22 mi69 minSSW 38.00 miA Few Clouds56°F54°F93%1016.8 hPa

Link to 5 minute data for KWVI

Wind History from WVI (wind in knots)
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Last 24hr4CalmSW9SW7SW8S8S7S8S7S7S7SE3SE3S3CalmCalmN3CalmCalmCalmCalmCalmSW3SE3
1 day agoS436SW76S8S5S7S8S7S7SE5SE5E3NE4CalmCalmE3CalmSE3E3S5E4SE3
2 days ago3SW6SW7S11S73S6S7S8SE7SE7SE7E6E3NE3CalmCalmCalm3NE3SE4E3E3Calm

Tide / Current Tables for Santa Cruz, Monterey Bay, California
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Santa Cruz
Click for Map
Fri -- 02:00 AM PDT     4.35 feet High Tide
Fri -- 05:57 AM PDT     Sunrise
Fri -- 08:55 AM PDT     0.25 feet Low Tide
Fri -- 11:18 AM PDT     Moonset
Fri -- 03:56 PM PDT     4.43 feet High Tide
Fri -- 08:29 PM PDT     Sunset
Fri -- 09:51 PM PDT     2.63 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.84.24.44.23.62.81.810.40.20.51.122.93.74.34.44.33.93.432.72.62.8

Tide / Current Tables for Ano Nuevo Island, California
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Ano Nuevo Island
Click for Map
Fri -- 01:51 AM PDT     4.25 feet High Tide
Fri -- 05:58 AM PDT     Sunrise
Fri -- 08:49 AM PDT     0.15 feet Low Tide
Fri -- 11:19 AM PDT     Moonset
Fri -- 03:47 PM PDT     4.33 feet High Tide
Fri -- 08:31 PM PDT     Sunset
Fri -- 09:45 PM PDT     2.53 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.84.14.243.42.61.60.80.30.20.51.122.93.74.24.34.13.73.32.92.62.52.7

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 (12,3,4,5)
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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.