Friday, April3, 2020
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Marine Weather and Tides
Carmet, 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 6:51AMSunset 7:37PM Thursday April 2, 2020 9:27 PM PDT (04:27 UTC) Moonrise 12:26PMMoonset 2:36AM 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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PZZ540 Coastal Waters From Point Arena To Point Reyes California Out To 10 Nm- 831 Pm Pdt Thu Apr 2 2020
.small craft advisory in effect through late Friday night...
Tonight..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 9 to 10 ft, decreasing to 8 ft after midnight. NW swell 4 to 6 ft at 10 seconds and S around 2 ft at 16 seconds.
Fri..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 8 to 9 ft. Mixed swell nw 3 to 4 ft at 11 seconds and S around 2 ft at 16 seconds.
Fri night..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 5 to 6 ft. Mixed swell nw around 3 ft at 10 seconds and S around 2 ft at 15 seconds.
Sat..SW winds 10 to 15 kt. Wind waves 3 to 4 ft. Mixed swell W 3 to 4 ft at 10 seconds and S around 2 ft at 15 seconds. Rain.
Sat night..SW winds 10 to 15 kt. Wind waves 3 to 4 ft. W swell 4 to 5 ft at 10 seconds and S around 2 ft at 14 seconds. A chance of rain.
Sun..S winds 15 to 20 kt with gusts up to 25 kt. Wind waves 5 to 6 ft. W swell 4 to 5 ft at 10 seconds and S around 2 ft at 13 seconds. Rain.
Sun night..W winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 4 to 5 ft at 9 seconds and S around 2 ft at 13 seconds. A chance of rain.
Mon..NW winds up to 10 kt. Wind waves 1 ft. NW swell 5 to 7 ft and S around 2 ft. A chance of rain.
Tue..NW winds up to 10 kt. Wind waves 1 to 2 ft. W swell 6 to 8 ft and S 2 to 3 ft.
PZZ500 831 Pm Pdt Thu Apr 2 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Strong northwest winds over the waters with occasional gale force gusts possible through tonight and into Friday. Fresh and steep wind generated waves can be produced, creating hazardous conditions for smaller vessels. Winds will start to subside late Friday and into the weekend. A moderate, predominately winds driven, northwesterly swell will prevail through much of the forecast period.


7 Day Forecast for Marine Location Near Carmet, CA
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location: 38.37, -123.08     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 030358 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 858 PM PDT Thu Apr 2 2020

SYNOPSIS. Dry weather conditions with slightly below normal temperatures through tomorrow. A pair of storm systems arrive this weekend. The first system on Saturday will be mainly focused over the North Bay/Shoreline with breezy winds. The second stronger system arrives Sunday and will bring widespread rain, gusty southerly winds, isolated thunderstorms, cooler temperatures, and lingering showers through potentially much of next week.

DISCUSSION. as of 08:56 PM PDT Thursday . Another pleasant early April afternoon around the Bay Area. Despite the wall to wall sunshine temperatures came up a few short for where they should be this time of year. Highs this afternoon topped out mainly in the upper 50s and 60s with a handful lower 70s.

Skies will remain clear again tonight as a ridge of high pressure off the coast builds over the region. Compare to last night the winds will also be weaker, especially in the hills. However, enough mixing will remain which will keep overnight lows from really bottoming out. Additionally, dew points overnight are also forecast to be a tad higher. Current forecast for tonight has lows dropping into mid 30s to 40s. Similar to last night protected valley locations may locally drop to near freezing. Therefore, patchy frost will be possible again. No update is needed to the forecast.

Friday will be another nice day around the Bay Area with mostly sunny skies early with increasing clouds late in the day. The biggest impact weatherwise the next few days will be the unsettled weather returning this weekend.

For more details on the weekend see below.

PREV DISCUSSION. as of 03:00 PM PDT Thursday .

For the weekend, a pair of storm systems will arrive and bring unsettled weather throughout the weekend and into early next week. The first of these systems will be the weaker of the two, featuring a more tightly bound 542dm 500mb upper low skirting across extreme NW California. The frontal boundary ahead of the parent upper low will first bring rain (0.25-0.50") to the North Bay throughout the morning, before shifting focus to the SF Bay Area around midday Saturday (0.10-0.30"), and eventually weakening before shifting farther southward towards the Central Coast by the evening (0.05-0.20"). Moderate southerly winds will precede and accompany the surface cold front on the order of 10-20mph sustained with gusts 15-25mph.

Then, lingering isolated showers will persist overnight before the arrival of the next storm system early Sunday, a broader, more organized 530-535dm 500mb upper low. This second storm system is anticipated to bring approximately 2 to 3 times as much precipitation as the first storm system (0.50-1.00" regionwide for urban areas, 1.50-2.50" for coastal ranges), with gusty southerly winds (15-25mph sustained, gusts up 25-40mph), and a cooler, more unstable air mass arriving with it. The post frontal instability will allow for the deeper development of convection and with that, the possibility of hail and even thunderstorms. Snow levels will also drop down to as low as 3000-3500 ft in the post frontal environment into Sunday night, allowing for a dusting of snow amongst the highest peaks across the forecast region (and much more over the Sierra -- check out NWS Sacramento or NWS Reno for the Tahoe forecast). Latest model runs suggest the upper low will slow down as shifts southward into Southern California, extending the possibilities of linger/wrap around showers throughout much of next week.

AVIATION. as of 4:46 PM PDT Thursday . For 00Z TAFs. VFR as clear skies surround the region. Winds remain onshore and breezy, with isolated occasional stronger gusts. Winds will ease slightly overnight. Skies are expected to remain mostly clear with a few clouds above 1,500 feet. VFR forecast Friday as winds strengthen in the late afternoon/evening.

Vicinity of KSFO . Clear skies and VFR. Winds remain onshore and 15-18 knots with occasional stronger gusts. Winds will ease over night slightly, but remain breezy. Skies should also remain mostly clear and VFR, but cannot rule out a few midlevel clouds. Thursday will be VFR once again, with onshore winds ramping up in the afternoon ahead of the next system approaching.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR with breezy onshore winds. Winds will ease overnight. A few clouds may develop over the peninsula, but are not currently forecasting lower than 1,500. VFR once again on Friday with stronger winds in the early evening.

MARINE. as of 08:38 PM PDT Thursday . Strong northwest winds over the waters with occasional gale force gusts possible through tonight and into Friday. Fresh and steep wind generated waves can be produced, creating hazardous conditions for smaller vessels. Winds will start to subside late Friday and into the weekend. A moderate, predominately winds driven, northwesterly swell will prevail through much of the forecast period.

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



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

Visit us at www.weather.gov/sanfrancisco

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 14 mi37 min NW 29 G 35 51°F9 ft1019.7 hPa
46214 - Point Reyes, CA (029) 36 mi57 min 54°F11 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 44 mi37 min NW 25 G 31 51°F 54°F10 ft1019.8 hPa
46237 - San Francisco Bar, CA (142) 47 mi57 min 55°F7 ft
RCMC1 - 9414863 - Richmond, CA 47 mi57 min NW 11 G 13 55°F 57°F1018 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 47 mi59 min WNW 1.9 53°F 1018 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 48 mi57 min WSW 8 G 13 56°F 1017.7 hPa

Wind History for Point Reyes, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa, Santa Rosa Sonoma County Airport, CA17 mi2.6 hrsNNW 910.00 miFair62°F27°F26%1016.6 hPa

Link to 5 minute data for KSTS

Wind History from STS (wind in knots)
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Last 24hrN7N8N9N8N8N9N9N6N10N7N6N8N6NW6NW3CalmCalm--SW8----NW9--NW9
1 day agoNW8NW5NW10NW9NW6W5CalmCalmCalmCalmCalmN11N11N10N9NW10NW10
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2 days agoNW4CalmW3SW4CalmCalmCalmSE3CalmCalmCalmCalmCalmCalmNW4CalmW7NW6NW7NW7NW7W9W8NW7

Tide / Current Tables for Bodega Harbor entrance, California
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Bodega Harbor entrance
Click for Map
Fri -- 01:50 AM PDT     2.98 feet Low Tide
Fri -- 04:24 AM PDT     Moonset
Fri -- 06:53 AM PDT     Sunrise
Fri -- 07:12 AM PDT     5.10 feet High Tide
Fri -- 02:27 PM PDT     -0.16 feet Low Tide
Fri -- 02:34 PM PDT     Moonrise
Fri -- 07:38 PM PDT     Sunset
Fri -- 09:26 PM PDT     4.60 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.33.133.23.74.34.85.154.43.52.31.20.3-0.1-0.10.41.22.23.24.14.54.54.2

Tide / Current Tables for Salt Point, California Current
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Salt Point
Click for Map
Fri -- 03:09 AM PDT     0.00 knots Slack
Fri -- 04:26 AM PDT     Moonset
Fri -- 05:49 AM PDT     0.61 knots Max Flood
Fri -- 06:54 AM PDT     Sunrise
Fri -- 08:32 AM PDT     -0.00 knots Slack
Fri -- 11:49 AM PDT     -1.25 knots Max Ebb
Fri -- 02:35 PM PDT     Moonrise
Fri -- 03:47 PM PDT     0.00 knots Slack
Fri -- 06:55 PM PDT     1.07 knots Max Flood
Fri -- 07:39 PM PDT     Sunset
Fri -- 10:11 PM PDT     -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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-0.6-0.5-0.3-00.30.50.60.50.2-0.2-0.7-1.1-1.2-1.1-0.8-0.40.10.611.10.90.60.1-0.4

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 (0,6,7,8)
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Ground Weather Radar Station Sacramento, 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.