Wednesday, October28, 2020
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Marine Weather and Tides
Boulder Creek, CA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:28AMSunset 6:15PM Wednesday October 28, 2020 6:23 PM PDT (01:23 UTC) Moonrise 4:19PMMoonset 3:41AM Illumination 92% Phase: Waxing Gibbous; Moon at 12 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- 204 Pm Pdt Wed Oct 28 2020
Rest of today..W winds up to 10 kt. Wind waves 1 ft. NW swell 2 to 3 ft at 10 seconds and nw around 2 ft at 12 seconds.
Tonight..NW winds 5 to 10 kt. Wind waves 1 ft. NW swell 2 to 3 ft at 10 seconds and nw around 2 ft at 12 seconds.
Thu..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell around 2 ft at 9 seconds.
Thu night..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell around 2 ft at 8 seconds.
Fri..NW winds 5 to 15 kt. Wind waves 2 to 3 ft. NW swell around 2 ft at 10 seconds.
Fri night..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell around 2 ft at 10 seconds.
Sat..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 1 to 2 ft. NW swell 2 to 3 ft and sw up to 2 ft.
Sun..N winds 5 to 10 kt. Wind waves 1 ft. Mixed swell nw 2 to 3 ft and sw around 2 ft.
PZZ500 204 Pm Pdt Wed Oct 28 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light winds will prevail through much of the rest of the week with south to southwest over most of the waters into tonight. Winds will shift back out of the northwest by tomorrow before winds increase slightly Friday and into Saturday. Mixed seas will persist through the period with a pair of northwest swell trains in addition to a lighter southerly swell and some weak wind waves.


7 Day Forecast for Marine Location Near Boulder Creek, CA
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location: 37.13, -122.29     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 282356 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 456 PM PDT Wed Oct 28 2020

SYNOPSIS. High pressure will bring sunny, mild afternoons and cool, clear nights through the remainder of the week. A slight warming trend is then forecast this weekend with continued dry weather conditions.

DISCUSSION. as of 02:28 PM PDT Wednesday . Hazy skies are being observed in a few locations along the Central Coast and South Bay this afternoon as elevated smoke from the active fires along the Sierra Crest has continued to flow in the direction of our southern CWA. Visible satellite imagery shows much of the elevated smoke exiting over our southern waters. Meanwhile, the Farallones measured clear skies this afternoon, which is in concert with the clear conditions over much of the Bay Area. Some haze has been observed in portions of the North Bay as well, but most of it is from the fires in Northern California and still very elevated.

The 550dm 500 hPa trough that helped to mix the incredibly dry and windy air mass all the way down to the coast is now well past the lee of the Rockies and centered over the Texas Panhandle. In its wake, its exit has allowed for the axis of the 588dm 500 hPa ridge to slowly inch its way towards the West Coast. As it does so, have seen a gradual weakening of winds at all elevations of our CWA, along with subtle warming trend that is expected to continue through Thursday afternoon. With the exception of Friday, Max temps will continue to increase through the rest of the week, reaching the low 80s F across much of the interior, while some of our warmest locations will get into the mid-80s F. Along the coast, can expect widespread 70s F.

Daytime highs will drop off across much of the interior by a few degrees on Friday as the ridge weakens some and allows for a weak trough to influence the California Coast. Local WRF picks up very well on this brief passage and suggests greater deepening of the marine layer, especially along the SF Peninsula that could get into parts of the Bay Shoreline. Increase in onshore flow looks set to also affect parts of the Delta Friday. As such, expecting for the continuation of improved RH recoveries along the coast and the immediate interior through the rest of the workweek. Overall, this trough will be a brief setback in the warming trend that for the rest of the week. it should be noted that because it is fall we will also continue experiencing greater day-to-night temp variations across the entire CWA, especially in interior valleys regionwide.

In terms of whether or not we can expect any sort of rain relief, members from both the ECMWF ENS and GEFS are still in fair agreement that following the ridge resurgence this weekend, can expect another trough to move into the PAC NW. This setup will introduce moisture to that area sometime early next week. As for Northern and Central California, a couple more ECMWF ENS and GEFS members are suggesting that enough PAC moisture could potentially allow for some precipitation to move down to portions of our CWA during that period. Nonetheless, still several days out and has been seen in the past, may still end up with null precip and a dry frontal passage. Speaking of which, members are also suggesting yet another offshore signature during the early part of next week as the axis of the trough comes ashore. All in all, the setup for next week still remains rather variable so will be monitoring closely as newer runs come in and pattern becomes clearer.

AVIATION. as of 4:56 PM PDT Wednesday . For 00z tafs. VFR conditions through the period as a predominately dry air mass remains over the region. Satellite imagery shows clear skies over land and some stratus just offshore of northern Sonoma and southern Mendocino counties, but not expecting any impacts on terminals overnight. Coastal profilers show the shallow marine layer from this morning has been mixed out. Not expecting a return of the marine layer through the TAF period, with continued light offshore flow aloft, and dry conditions at the surface. Winds generally light and variable through the evening and overnight hours.

Vicinity of KSFO . VFR through the period. Winds have turned onshore at 9-10 kt and should remain so through around 05z, then becoming light and variable. Return of onshore flow expected late Thursday afternoon.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR through the period. Some clouds about 20 miles offshore approaching the coastline, but will likely dissipate before reaching land. Light onshore winds but breezier down the Salinas Valley. Winds become light overnight with mostly clear skies. Onshore flow returns Thursday afternoon.

MARINE. as of 2:04 PM PDT Wednesday . Generally light winds will prevail through much of the rest of the week with south to southwest over most of the waters into tonight. Winds will shift back out of the northwest by tomorrow before winds increase slightly Friday and into Saturday. Mixed seas will persist through the period with a pair of northwest swell trains in addition to a lighter southerly swell and some weak wind waves.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. None.

PUBLIC FORECAST: Diaz/RWW AVIATION: Lorber MARINE: AS

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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 25 mi44 min NW 1.9 G 3.9 60°F 59°F1017.3 hPa51°F
RTYC1 - 9414523 - Redwood City, CA 26 mi54 min NNW 5.1 G 6 68°F 67°F1017.3 hPa
46092 - MBM1 30 mi85 min W 5.8 60°F 59°F1016.7 hPa (-0.8)
46114 - West Monterey Bay, CA 30 mi58 min 60°F5 ft
MLSC1 - Moss Landing, South Harbor, CA 35 mi52 min WNW 1.9 G 6 61°F 1012.3 hPa53°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 35 mi44 min W 1.9 G 3.9 59°F 1017.7 hPa55°F
ELXC1 - Elkhorn Slough Reserve, CA 36 mi99 min W 4.1 65°F 51°F
46240 - Cabrillo Point, Monterey Bay, CA (158) 40 mi58 min 60°F2 ft
MEYC1 42 mi48 min NNW 8.9 G 8.9 62°F1017.2 hPa
AAMC1 - 9414750 - Alameda, CA 44 mi54 min W 4.1 G 5.1 69°F 63°F1016.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 46 mi54 min W 1.9 G 2.9
PXOC1 - 9414311 - San Francisco (Pier 1), CA 46 mi54 min WSW 2.9 G 5.1 69°F 1015.7 hPa
LNDC1 46 mi54 min WSW 2.9 G 4.1 72°F 1016.6 hPa
OBXC1 47 mi54 min 67°F 51°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 47 mi54 min WNW 6 G 8.9 64°F 1016.6 hPa
PXSC1 47 mi54 min 69°F
FTPC1 - 9414290 - San Francisco, CA 48 mi54 min WSW 7 G 11 61°F 61°F1017.1 hPa
46237 - San Francisco Bar, CA (142) 49 mi54 min 58°F3 ft

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for KNUQ

Wind History from NUQ (wind in knots)
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Last 24hr--------------------------------CalmCalmCalmCalmCalmCalmCalmCalm
1 day ago--------------------------------CalmCalmCalmCalmCalmCalmSE4Calm
2 days ago--------------------------------NW6CalmSW54CalmN25
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Tide / Current Tables for Ano Nuevo Island, California
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Ano Nuevo Island
Click for Map
Wed -- 02:54 AM PDT     0.80 feet Low Tide
Wed -- 04:41 AM PDT     Moonset
Wed -- 07:30 AM PDT     Sunrise
Wed -- 09:19 AM PDT     4.88 feet High Tide
Wed -- 03:38 PM PDT     0.98 feet Low Tide
Wed -- 05:19 PM PDT     Moonrise
Wed -- 06:15 PM PDT     Sunset
Wed -- 09:31 PM PDT     4.22 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.31.510.81.11.82.73.64.44.94.84.23.42.41.51.111.42.12.93.74.24.23.8

Tide / Current Tables for Santa Cruz, California
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Santa Cruz
Click for Map
Wed -- 02:58 AM PDT     0.82 feet Low Tide
Wed -- 04:39 AM PDT     Moonset
Wed -- 07:28 AM PDT     Sunrise
Wed -- 09:45 AM PDT     4.94 feet High Tide
Wed -- 03:43 PM PDT     0.99 feet Low Tide
Wed -- 05:17 PM PDT     Moonrise
Wed -- 06:14 PM PDT     Sunset
Wed -- 09:52 PM PDT     4.17 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.61.710.81.11.72.53.44.24.84.94.53.72.71.71.111.322.83.544.23.9

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
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.