Saturday, February27, 2021
Privacy Policy
L-36.com

Marine Weather and Tides
Roseland, CA

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:43AMSunset 6:03PM Saturday February 27, 2021 12:52 AM PST (08:52 UTC) Moonrise 6:42PMMoonset 7:22AM Illumination 100% Phase: Full Moon; Moon at 15 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
    EDIT      (on/off)   Help
PZZ540 Coastal Waters From Point Arena To Point Reyes California Out To 10 Nm- 838 Pm Pst Fri Feb 26 2021
.gale warning in effect through Saturday afternoon...
Tonight..NW winds 25 to 35 kt with gusts up to 40 kt. Wind waves 13 to 15 ft. NW swell 9 to 11 ft at 16 seconds.
Sat..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 12 to 14 ft. NW swell 8 to 10 ft at 15 seconds.
Sat night..N winds 20 to 30 kt with gusts up to 35 kt. Wind waves 8 to 9 ft. NW swell 8 to 10 ft at 14 seconds.
Sun..NW winds 5 to 15 kt. Wind waves 5 to 6 ft. NW swell 6 to 8 ft at 13 seconds.
Sun night..N winds 5 to 10 kt. Wind waves 4 to 5 ft. NW swell 5 to 7 ft at 13 seconds.
Mon..S winds 5 to 10 kt. Wind waves 5 to 6 ft. NW swell 3 to 5 ft at 12 seconds.
Mon night..NW winds around 10 kt. Wind waves 6 to 7 ft. NW swell 2 to 4 ft at 11 seconds.
Tue..NW winds 10 to 20 kt. Wind waves 4 to 5 ft. NW swell 7 to 9 ft.
Wed..NW winds 5 to 15 kt. Wind waves around 2 ft. NW swell 7 to 9 ft.
PZZ500 838 Pm Pst Fri Feb 26 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gale force northwest winds continue over the waters this evening and will through early Saturday morning. Northern coastal waters can expect winds to diminish through Saturday afternoon, while the big sur coast south of point sur and all outer waters will remain at gale force not subsiding until late Saturday night. These winds will generate steep wind waves through Saturday night and bring hazardous conditions for smaller vessels. A moderate period northwest swell persists through the weekend.


7 Day Forecast for Marine Location Near Roseland, CA
   Hourly   EDIT   Help
location: 38.43, -122.71     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS66 KMTR 270533 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 933 PM PST Fri Feb 26 2021

SYNOPSIS. Cool nights, mild afternoons, and dry weather conditions will persist through the upcoming weekend. Locally gusty offshore winds are expected from late tonight through Sunday morning, mainly at higher elevations. Much of the San Francisco Bay Area and Central Coast will likely remain dry through at least the middle of next week before rain chances potentially return late in the week.

DISCUSSION. As of 8:55 PM PST Friday . Gusty northwest winds developed this afternoon, mainly near the ocean, as another in a series of shortwave troughs dropped southeast out of the Pac NW and towards the Great Basin. Northwest wind gusts of between 30 and 40 mph were observed near the ocean this afternoon and early evening. Winds have since begun to subside and will continue to decrease at lower elevations through the night. As the upper trough continues to dig southward into the Great Basin from tonight through Saturday Night, offshore surface pressure gradients will gradually ramp up, resulting in winds veering to the north in the hills tonight and increasing in intensity starting late tonight. Winds are expected to reach their peak on Saturday night and early Sunday. Strongest winds will mostly be confined to the higher peaks tonight and Saturday morning, but will become somewhat more widespread above 1000 feet from tomorrow afternoon through tomorrow night. Breezy conditions ma also develop locally down to near sea level once the nocturnal inversion dissipates tomorrow, especially in areas near the Delta. However, winds are expected to remain below advisory levels, except at isolated higher peaks where gusts of 50 to 60 mph are likely, mainly on Saturday night and early Sunday. Winds are forecast to decrease in all areas by Sunday afternoon.

Dry weather is expected to continue through the weekend. Daytime temperatures will trend a bit warmer by Sunday, but generally remain near seasonal averages, except slightly warmer than average in areas that experience downslope warming during north wind events (e.g., Santa Rosa). Clear skies and dry air will mean chilly nights will continue, especially in the wind sheltered interior valleys.

From Previous Discussion . With the dry, offshore flow over the region daytime temperatures will remain above seasonal averages through the upcoming weekend. Look for upper 50s near the coast to low/mid 60s inland. Overnight lows will drop into the 30s in the interior valleys (especially at times the winds are calm) to 40s elsewhere.

Early next week the forecast models and ensembles indicate a mid/upper level trough will drop southward just off of the Pacific Northwest coast before becoming a cut-off low. The trajectory of this upper level low looks to remain well off of the coast as it drops southward and eventually inland over central or southern California Tuesday/Wednesday. At this time, the National Blend of Models maintains dry weather conditions through at least the first half of next week. If any precipitation were to occur with this system, rainfall would be light in the form of isolated showers.

Confidence in the return of unsettled/wetter weather continues to increase by late next week and into the following weekend as the ensembles indicate a more active pattern developing over the region. From previous discussion: "Longer range forecast - ECMWF Weeklies and GEFS extended are starting to show some promise of more rain heading into the second week of March . The latest CPC 8-14 day outlook is also showing increased likelihood precip." Stay tuned .

AVIATION. as of 9:33 PM PST Friday . For the 06Z TAFs. Winds remain out of the northwest, and are starting to diminish though breezier winds remain closer to the coast. Skies are clear, with the exception of patches of low clouds around the East Bay Hills in the Santa Clara Valley and the Santa Lucia's near the Monterey Bay. TEMPO groups for isolated MVFR conditions were added to select TAFs but are not forecast to prevail through the night. Otherwise VFR through the TAF period. Chances of LLWS remain in the TAFs for the North Bay and KLVK for early tomorrow morning. VFR Saturday with gusty northwest winds again with another chance of LLWS after 06Z Saturday night as winds aloft are forecast to remain strong.

Vicinity of KSFO . VFR. Winds still up to and around 20 kts at this hour, but will diminish after 08Z, but remain breezy through the night. No new data to remove the chance for LLWS after 12Z, but also nothing to add confidence and put it in the TAF so like the previous TAF package, it remains out. As clear skies remain, strong wind gusts are expected once again Saturday afternoon. Chance of LLWS Saturday night as winds subside yet again.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Strong winds and wind gusts remain for coastal terminals, but continue to subside. A patch of clouds has developed on both the Santa Lucia and Gabilan ranges, so TEMPO groups were added for MVFR conditions for the next few hours. Plus, the chance for patchy fog near KSNS Saturday morning. Otherwise VFR through the period. Winds increase once again Saturday afternoon, subsiding Saturday night.

MARINE. as of 08:38 PM PST Friday . Gale force northwest winds continue over the waters this evening and will through early Saturday morning. Northern coastal waters can expect winds to diminish through Saturday afternoon, while the Big Sur coast south of Point Sur and all outer waters will remain at gale force not subsiding until late Saturday night. These winds will generate steep wind waves through Saturday night and bring hazardous conditions for smaller vessels. A moderate period northwest swell persists through the weekend.

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



PUBLIC FORECAST: Dykema/RGass AVIATION: DK MARINE: DK

Visit us at www.weather.gov/sanfrancisco

Follow us on Facebook, Twitter, and YouTube at: www.facebook.com/nwsbayarea www.twitter.com/nwsbayarea www.youtube.com/nwsbayarea


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BDXC1 21 mi47 min 58°F
PRYC1 - 9415020 - Point Reyes, CA 33 mi53 min 49°F1021.3 hPa (+0.5)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 35 mi53 min NW 14 G 16 50°F 1019.2 hPa (+0.5)
CQUC1 36 mi64 min 55°F
RCMC1 - 9414863 - Richmond, CA 38 mi53 min NW 8 G 12 49°F 54°F1019.8 hPa (+0.7)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 40 mi72 min NNW 4.1 49°F 1020 hPa
SFXC1 - San Francisco Bay Reserve, CA 40 mi68 min W 5.1 46°F 1019 hPa38°F
UPBC1 41 mi53 min WNW 16 G 20
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi53 min W 14 G 17 50°F 55°F1019.4 hPa (+0.9)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 41 mi53 min NW 5.1 G 8 51°F 1020.2 hPa (+0.9)
PCOC1 - 9415144 - Port Chicago, CA 44 mi53 min SSW 2.9 G 7 48°F 54°F1019.4 hPa (+0.9)
FTPC1 - 9414290 - San Francisco, CA 45 mi53 min S 2.9 G 2.9 47°F 54°F1019.7 hPa (+0.7)
46237 - San Francisco Bar, CA (142) 45 mi53 min 50°F9 ft
PXSC1 46 mi53 min 51°F 42°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 47 mi33 min NW 31 G 39 50°F1020.4 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 47 mi53 min N 1.9 G 5.1 50°F 1019 hPa (+0.9)
OKXC1 - 9414776 - Oakland (Berth 34), CA 47 mi53 min NNW 9.9 G 14 50°F 1019.9 hPa (+0.7)
OBXC1 47 mi53 min 51°F 39°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 48 mi53 min NNW 11 G 12
LNDC1 49 mi53 min NNW 4.1 G 7 51°F 1019.8 hPa (+0.6)

Wind History for Point Reyes, CA
(wind in knots)    EDIT      (on/off)   Help
Last
24hr
1 day
ago
2 days
ago

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa, Santa Rosa Sonoma County Airport, CA8 mi60 minNNW 12 G 1810.00 miFair47°F31°F54%1019.5 hPa
Petaluma Municipal Airport, CA13 mi58 minWNW 710.00 miFair43°F36°F76%1020.3 hPa
Novato / Gnoss Field, CA21 mi78 minNW 1610.00 miFair50°F34°F54%1019.6 hPa

Link to 5 minute data for KSTS

Wind History from STS (wind in knots)
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
Last 24hr4N7W3NW3NW44W3S3N10N10NW14
G20
NW18
G23
NW20
G26
NW16
G25
NW19
G26
NW14
G21
NW8NW15NW8NW13NW11NW7NW16
G23
NW12
G18
1 day agoN18
G27
N12N12NW4W5CalmNW3NW3CalmCalmW3Calm3W4SW5S6S6S4CalmCalmCalmNW4N113
2 days agoN8N7N8N4N4N4N10N6NE8N8NW8NW7N11NE13
G19
N13
G19
NE12NE17
G23
NE13
G22
E13NE15NE20
G26
NE18NE23
G31
NE24
G36

Tide / Current Tables for Upper drawbridge, Petaluma River, San Pablo Bay, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Upper drawbridge
Click for Map
Sat -- 12:19 AM PST     Full Moon
Sat -- 02:11 AM PST     6.10 feet High Tide
Sat -- 06:44 AM PST     Sunrise
Sat -- 07:20 AM PST     Moonset
Sat -- 08:13 AM PST     1.57 feet Low Tide
Sat -- 01:23 PM PST     7.37 feet High Tide
Sat -- 06:02 PM PST     Sunset
Sat -- 06:42 PM PST     Moonrise
Sat -- 08:48 PM PST     -0.42 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
45.46.15.95.142.921.61.93.14.76.37.37.36.65.33.720.6-0.2-0.40.31.7

Tide / Current Tables for Lakeville, Petaluma River, San Pablo Bay, California
   EDIT      (on/off)   Help   One Week of Data
Lakeville
Click for Map
Sat -- 12:19 AM PST     Full Moon
Sat -- 02:00 AM PST     5.84 feet High Tide
Sat -- 06:44 AM PST     Sunrise
Sat -- 07:20 AM PST     Moonset
Sat -- 07:53 AM PST     1.57 feet Low Tide
Sat -- 01:12 PM PST     7.05 feet High Tide
Sat -- 06:01 PM PST     Sunset
Sat -- 06:42 PM PST     Moonrise
Sat -- 08:28 PM PST     -0.42 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
4.25.45.85.54.73.62.51.81.62.13.44.96.376.964.73.11.50.3-0.4-0.30.62

Weather Map
       (on/off)   Help Weather Map
wmap_P
GEOS Local Image of CentralWestCoast    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
Link to Loop

Other links: GEOS-West     Contential US     Full GOES-East
Ground Weather Radar Station




Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. Google supplies the ads on this site. Because I do not track who you are, I cannot customize how these ads are served. They may be personalized to improve the ad experience. If you do not want personalized ads, please adjust the settings on the Google site HERE. NOTE: The best I can determine, this site is not subject to CCPA but I am doing my best to comply anyway.
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.