Sunday, January17, 2021
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Marine Weather and Tides
Inverness, 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 7:23AMSunset 5:18PM Sunday January 17, 2021 1:45 AM PST (09:45 UTC) Moonrise 10:30AMMoonset 10:10PM Illumination 16% Phase: Waxing Crescent; Moon at 4 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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PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 829 Pm Pst Sat Jan 16 2021
.small craft advisory in effect until 9 pm pst this evening...
Tonight..NW winds 15 to 25 kt with gusts up to 30 kt, becoming N 5 to 15 kt after midnight. Wind waves 7 to 8 ft. SWell W 8 to 10 ft at 16 seconds.
Sun..NW winds 5 to 15 kt. Wind waves 5 to 6 ft. W swell 3 to 5 ft at 24 seconds and W 5 to 7 ft at 14 seconds.
Sun night..NW winds 10 to 20 kt with gusts up to 30 kt. Wind waves 8 to 9 ft. W swell 8 to 10 ft at 23 seconds and W 2 to 4 ft at 14 seconds.
Martin luther king jr day..N winds 15 to 25 kt with gusts up to 45 kt. Wind waves 8 to 9 ft. W swell 10 to 12 ft at 19 seconds.
Mon night..N winds 25 to 35 kt with gusts up to 50 kt. Wind waves 9 to 10 ft. W swell 7 to 9 ft at 17 seconds.
Tue..N winds 25 to 35 kt with gusts up to 50 kt. Wind waves 7 to 8 ft. W swell 4 to 6 ft at 15 seconds.
Tue night..NE winds 10 to 20 kt. Wind waves 5 to 6 ft. W swell 3 to 5 ft at 14 seconds.
Wed..N winds 5 to 15 kt. Wind waves 5 to 6 ft. W swell 4 to 6 ft.
Thu..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 4 to 6 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 8 to 10 ft with a dominant period of 17 seconds. Across the bar...seas 12 to 14 ft with a dominant period of 16 seconds. Maximum ebb current of 1.9 kt at 07:49 am Sunday and 2.4 kt at 07:49 pm Sunday.
PZZ500 829 Pm Pst Sat Jan 16 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Increasing northwest winds through the night. As seas and breezy winds combine for hazardous seas conditions, particularly for smaller vessels. Winds will shift more northerly tomorrow to tomorrow night and increase as offshore winds pick up over land. These stronger winds will then continue into early next week with gale force conditions likely. The next large, long period northwest swell will arrive Sunday.


7 Day Forecast for Marine Location Near Inverness, CA
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location: 38.11, -122.87     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 170543 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 943 PM PST Sat Jan 16 2021

SYNOPSIS. A warming and drying trend will continue through this weekend as high pressure builds over the state. Two back to back low pressure systems to our east will produce breezy to gusty offshore flow Sunday night through Tuesday evening. Cooling trend is forecast from Wednesday through Friday.

DISCUSSION. as of 09:03 PM PST Saturday . A little excitement to end the day as the staff here felt a 4.5 magnitude earthquake at the office in Monterey.

It felt and looked a little like summer today despite the calendar saying January. Afternoon highs were generally in the 60s and 70s again with even a few more in the 80s. The region tied a record of 70 at Kentfield and broke a record at Livermore with high a of 76. Similar to yesterday high temperatures of this magnitude are running 10-20 degrees above normal. The look of summer? A very shallow marine layer developed along the North Bay Coast and slid southward through the day. Given the shallow nature it resulted in fog along the immediate coast. Additionally, the afternoon clouds/fog created a sharp temperature gradient along the coast of 10-15 degrees in some places. Expect some patchy fog/low clouds locally along the coast tonight and early tomorrow.

Another warm day is expected again Sunday with highs in the 60s/70s and a few interior 80s. May be able to squeeze out another record high temperature too.

A majority of the focus through Tuesday quickly turns to wind. As noted below it looks like the Bay Area is in store for a good push of wind beginning Sunday evening and continuing through Tuesday. What's impressive is the time of year for offshore flow, duration, and coverage. The latest guidance from the 00Z deterministic runs show a stout offshore gradient from SFO-WMC just under -20mb. Will leave Wind Advisory as it for now starting Sunday evening and continuing through Tuesday. If anything there still appears to be a bigger burst of wind Monday night/Tuesday. As hi-res models capture the Monday night timeframe we may need to upgrade to a high wind warning.

PREV DISCUSSION. as of 02:05 PM PST Saturday . Pinch. Yes, it is January. About the only way we can tell right now is due to a highly active North Pacific that has produced some of the most consistent swell/surf for our area in recent memory. Otherwise a stout upper ridge is dominating the Bay Area and Monterey Bay region, bringing unseasonably warm and dry conditions. Today there has been a weak offshore component to the winds up a few thousand feet. This has really toyed with our area microclimates to the point that we have seen some serious nano climates. A RAWS site down toward Big Sur popped to 90 today, where two ridges away it was only in the mid 70s. This is the power of wind on air in action.

While the offshore flow has only played with the temperatures today, Sunday evening will bring a wholesale shift in what wind can do. The upper ridge that has been dominate for the last several days will be pushed on by upper low pressure as it dives from the north over California. This will setup a tightening pressure gradient across the Bay Area and Monterey Bay regions. Current model forecast are indicating a strong SFO-WMC gradient on the order of 13 to 17 mb, which is a significant offshore wind set up. EC ENS mean standardized anomalies are showing 2 to 3 standard deviations. In short, this is a solid offshore event taking shape. While we have seen strong offshore wind events in the past, the piece that makes this one stand out is the spatial coverage. Typically in our "offshore season", October, we see set ups favor an area such as North Bay. This time around we're looking 925mb winds in the 40 to 55 kt range from North Bay through Monterey County. This is a widespread event.

Two pieces to cover. 1) The wind itself. Sustained winds are forecast to be in the 5 to 20 mph range though populated areas, with the exact value being location dependent. Sustained winds in the hills and mountains are forecast to be in the 15 to 30 mph range. However, in events like this, it's the gusts that really do the damage. Occasional gusts in valley populated locations could be in the 20 to 45 mph range, again depending upon location. While in the hills and mountains, expect to see maximum gusts reach 45 to 60 mph range with the possibility of an isolated site or two trying to jump into the 70+ arena. Winds are dangerous in general due to fall and blowing trees and debris, but a mid-dry- winter wind event like this can be especially concerning for life and property safety. Branches are dry and brittle in many areas which means they are prone to break and fall, while trees may simply topple in some of the stronger gusts. Please know your risk. Take care of anything you need to take of before the wind hits Sunday evening. Wind statistically is the second leading cause of death due to weather in our area. Too many people have lost their lives to falling trees. 2) While we have seen a little rain this winter, it hasn't been a lot and most areas are running about 30% of average on the water year thus far. The rain we have had has helped the larger trees (fuels) to get some moisture in them. However, the fine fuels such as grasses and bushes moisten up quickly and dry out quickly. With the dry warm weather that has been occurring the last few days has shown itself in the fine fuels. Many areas have brown grasses and bone dry shrubs. With the wind set up locking in, fire becomes a concern, mainly in the grasses. Think of it like an early fire season set up. We have dry grasses, gusty winds coming, and plummeting relative humidities. Since the larger fuels still have moisture, we are not thinking of a red flag warning at this point, but will be watching closely each shift to analyze incoming data. In short, fire concerns exist. Be fire smart, don't be that spark.

Looking down the road of the week, models continue to hold on to a slight pattern shift toward the end of the week with a slight chance of rain on Friday. Don't get your hopes up though, the QPF doesn't look that great. Either way, it'd be good to have a cool down and at least a chance of a few drops of rain.

AVIATION. as of 09:42 PM PST Saturday . For the 06Z TAFs. VFR over most of the terminals, but in an almost summer-like set up, stratus has formed over the ocean, stretching from the San Francisco Peninsula southward down the Big Sur Coast. The main impacts so far with the stratus has been locally LIFR conditions on the Monterey Peninsula. Stratus should weaken through the night as offshore winds aloft increase. These winds aloft provide a chance LLWS of about 25-30 kt through Sunday morning and into the early afternoon. VFR conditions are expected on Sunday with breezy onshore winds. Offshore winds aloft will then once again increase Sunday night with the next chance for LLWS around 12z Monday.

Vicinity of KSFO . Stratus is expected to remain out over the ocean, but a few clouds around 400 ft may move over the terminal tonight. Winds aloft will increase and become offshore helping quell low cloud development. However winds loft are expected between 25-30 kts leaving LLWS is in the early morning TAF. Surface winds will increase Sunday afternoon and be onshore with VFR conditions. As winds weaken under mostly clear skies Sunday night, expected round 2 of LLWS as offshore winds aloft increase yet again after 10z.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . The stratus deck has continuously moved over and back out from terminals through the night. It's looking like it is getting quite comfortable . at least in the short term. Winds aloft are expected to increase, not enough for LLWS, but enough to help dissipate some of the cloud cover. However, if those offshore winds aloft don't materialize this far south, it's possible for the stratus to remain through the night. VFR is forecast for Sunday with breezy onshore winds. Models are indicating another chance for stratus build up late on Sunday night, but remains outside this TAF package.

BEACHES. as of 07:08 PM PST Saturday . A large, long period northwest swell arrives on Sunday morning and will result in hazardous conditions in the surf zone through Monday afternoon. Forerunners are expected to arrive at 3 to 7 feet with a period of 22 to 24 seconds, increasing the risk of sneaker waves. Swell heights are then expected to build through Sunday with breaking waves of 18 to 22 feet, locally higher at favored breakpoints, expected along west to northwest facing beaches. As a result, a High Surf Advisory is in effect through Monday afternoon for west and northwest facing beaches while a Beach Hazard Statement has been issued for the northern Monterey Bay including Santa Cruz. With unseasonably warm temperatures this holiday weekend, it will likely attract more people to the coast. Individuals should be reminded that our coastline and the cold Pacific waters remain dangerous as these larger than normal waves impact the coast. Extreme caution is advised when visiting area beaches. Never turn your back to the ocean.

CLIMATE. Record Type: Highs (Old Record Temp/Year)

Jan 16th Jan 17th Jan 18th

Santa Rosa 74/1991 71/1991 74/1976 Kentfield 70/2009 71/1994 70/2014 Napa 76/1920 72/1920 76/1920 Richmond 74/2014 73/2009 71/2018 Livermore 75/1920 70/1986 74/1919 San Francisco 72/2014 73/1991 70/1920 SFO 73/2014 70/1991 68/1948 Redwood City 74/2014 77/1948 74/2009 Half Moon Bay 76/2014* 75/2009 72/2009 Oakland Downtown 78/2014* 74/2014 73/2014 San Jose 73/2014 76/1920 74/1920 Gilroy 76/2014 77/2014 80/2014* Santa Cruz 84/2014 83/2014 83/1920 Salinas Airport 84/2014 86/2014* 81/1994 King City 85/1976 86/2014* 83/2009

*Monthly Records

MARINE. as of 08:29 PM PST Saturday . Increasing northwest winds through the night. As seas and breezy winds combine for hazardous seas conditions, particularly for smaller vessels. Winds will shift more northerly tomorrow to tomorrow night and increase as offshore winds pick up over land. These stronger winds will then continue into early next week with gale force conditions likely. The next large, long period northwest swell will arrive Sunday.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. 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 until 3 AM SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm until 3 AM



PUBLIC FORECAST: MM/BFG AVIATION: DK MARINE: DK

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BDXC1 18 mi100 min 52°F
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 25 mi26 min N 5.8 G 7.8 53°F 53°F1019.4 hPa51°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 25 mi26 min NNE 5.8 G 7.8 53°F1020.2 hPa
46237 - San Francisco Bar, CA (142) 26 mi46 min 52°F9 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 27 mi65 min Calm 51°F 1020 hPa
RCMC1 - 9414863 - Richmond, CA 28 mi52 min Calm G 1.9 53°F 53°F1020.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 30 mi52 min Calm G 1.9 54°F 1020.5 hPa
FTPC1 - 9414290 - San Francisco, CA 30 mi52 min Calm G 1 52°F 54°F1020.2 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 32 mi52 min ESE 2.9 G 4.1 52°F 1019.8 hPa
PXSC1 33 mi52 min 54°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 33 mi52 min Calm G 1.9 53°F 1019 hPa
46214 - Point Reyes, CA (029) 34 mi50 min 53°F12 ft
CQUC1 34 mi63 min 52°F
OBXC1 35 mi52 min 53°F 53°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 35 mi52 min Calm G 1 52°F 1020.1 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 36 mi58 min W 1 G 1.9
LNDC1 38 mi52 min NW 1 G 1.9 52°F 1020.1 hPa
AAMC1 - 9414750 - Alameda, CA 38 mi52 min NW 1 G 1 53°F 53°F1020.3 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 40 mi52 min SW 2.9 G 4.1 53°F 52°F1020.4 hPa
UPBC1 40 mi52 min W 5.1 G 6
PCOC1 - 9415144 - Port Chicago, CA 44 mi52 min SSW 2.9 G 5.1 54°F 52°F1020.1 hPa
SFXC1 - San Francisco Bay Reserve, CA 45 mi61 min Calm 44°F 1020 hPa42°F

Wind History for Point Reyes, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA17 mi71 minN 09.00 miFair45°F45°F100%1020.3 hPa

Link to 5 minute data for KDVO

Wind History from DVO (wind in knots)
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Last 24hrCalmCalmS3CalmCalmCalmCalmCalmCalmCalmCalmN5NW6N7SE6N6N6W3N3CalmCalmCalmCalmCalm
1 day agoS5S6S7CalmN4CalmCalmCalmN4CalmSE75SE7SE5SE4SW6CalmCalmS6CalmCalmCalmCalmCalm
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmN4Calm4
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4SE3SE5CalmCalmN6N63CalmS5CalmCalmS4

Tide / Current Tables for Inverness, Tomales Bay, California
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Inverness
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Sun -- 03:46 AM PST     4.63 feet High Tide
Sun -- 07:25 AM PST     Sunrise
Sun -- 09:45 AM PST     2.45 feet Low Tide
Sun -- 10:29 AM PST     Moonrise
Sun -- 02:41 PM PST     4.58 feet High Tide
Sun -- 05:18 PM PST     Sunset
Sun -- 09:55 PM PST     0.15 feet Low Tide
Sun -- 10:10 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.52.73.84.54.64.43.93.32.82.52.52.83.344.54.64.33.62.71.70.90.30.10.5

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Sun -- 12:12 AM PST     1.01 knots Max Flood
Sun -- 03:32 AM PST     -0.00 knots Slack
Sun -- 05:53 AM PST     -0.71 knots Max Ebb
Sun -- 07:25 AM PST     Sunrise
Sun -- 09:27 AM PST     0.00 knots Slack
Sun -- 10:30 AM PST     Moonrise
Sun -- 12:05 PM PST     0.63 knots Max Flood
Sun -- 02:52 PM PST     -0.00 knots Slack
Sun -- 05:19 PM PST     Sunset
Sun -- 05:58 PM PST     -1.09 knots Max Ebb
Sun -- 09:52 PM PST     0.00 knots Slack
Sun -- 10:11 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.90.70.3-0.2-0.6-0.7-0.6-0.4-0.20.20.50.60.60.3-0.1-0.5-0.9-1.1-1-0.7-0.40.10.5

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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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.