Friday, March22, 2019 L-36.com


Marine Weather and Tides
Lagunitas-Forest Knolls, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:09AMSunset 7:24PM Friday March 22, 2019 4:55 AM PDT (11:55 UTC) Moonrise 8:37PMMoonset 7:32AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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
PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 254 Am Pdt Fri Mar 22 2019
.small craft advisory in effect through Saturday morning...
.small craft advisory for rough bar in effect from this afternoon through Saturday morning...
Today..SE winds 10 to 20 kt...becoming S 15 to 25 kt this afternoon. Wind waves 3 to 5 ft. W swell 4 to 7 ft at 17 seconds and W 2 to 3 ft at 10 seconds. Rain.
Tonight..W winds 10 to 20 kt with gusts up to 25 kt. Wind waves 2 ft or less. W swell 7 to 10 ft at 17 seconds and S 1 to 2 ft at 14 seconds. Rain likely.
Sat..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 9 to 12 ft at 16 seconds and S 1 to 2 ft at 13 seconds.
Sat night..NW winds 5 to 15 kt. Wind waves 2 ft or less. W swell 9 to 12 ft at 16 seconds and S 1 to 2 ft at 13 seconds.
Sun..SE winds 5 to 15 kt. Wind waves 2 ft or less. W swell 7 to 10 ft at 15 seconds and S 1 to 2 ft at 18 seconds.
Sun night..S winds 25 to 35 kt with gusts up to 45 kt. Wind waves 5 to 7 ft. W swell 5 to 8 ft at 14 seconds and S 1 to 2 ft at 18 seconds. Rain likely.
Mon..S winds 5 to 15 kt. Wind waves 2 ft or less. W swell 6 to 8 ft and sw 1 to 2 ft. Rain likely.
Tue..S winds 5 to 15 kt. Wind waves 2 ft or less. W swell 6 to 9 ft and sw 1 to 2 ft. Showers likely.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 6 to 9 ft with a dominant of 17 seconds. Across the bar...combined seas 7 to 11 ft with a dominant period of 17 seconds. Maximum ebb current of 3.6 kt at 06:07 am Friday and 2.8 kt at 06:43 pm Friday.
PZZ500 254 Am Pdt Fri Mar 22 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Southerly winds will increase over the waters through the day as a frontal system moves across the coastal waters. Winds will become northwesterly overnight and into Saturday behind the frontal passage. A moderate long-period swell will arrive over the next 24 hours and continue through Saturday, bringing hazardous seas to mariners in smaller vessels.


7 Day Forecast for Marine Location Near Lagunitas-Forest Knolls, CA
   Hourly   EDIT   Help
location: 37.98, -122.74     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 221144
afdmtr
area forecast discussion
national weather service san francisco bay area
444 am pdt Fri mar 22 2019

Synopsis A frontal boundary will move from northwest to
southeast across the region today resulting in widespread rainfall
through tonight. Mainly dry conditions develop over the weekend
with unsettled weather likely to return during at least the first
half of next week.

Discussion As of 03:11 am pdt Friday... A modest plume of
atmospheric moisture is forecast to advect inland across the
region today ahead of an approaching frontal boundary. Light rain
will develop first over coastal areas from the santa cruz
mountains northward into the north bay through the morning. As the
front pushes inland from the northwest, rain will become more
widespread over the san francisco bay area this afternoon before
shifting southward into the central coast during the evening
hours. Rainfall will generally be light to occasionally moderate
with breezy southerly winds ahead of and along the frontal
boundary. In wake of the front's passage, northerly winds will
develop and precipitation will diminish from north to south
through the night. A few lingering showers may persist into early
Saturday morning, yet much of the region will dry out shortly
after sunrise. Rainfall amounts are forecast to range from 0.25"
to 0.75" for most urban areas while the coastal ranges and north
bay mountains hills could see upwards of 1.50".

Seasonably cool temperatures are expected on Saturday with
daytime temperatures in the upper 60s to lower 60s as brisk
northwest winds prevail. Winds relax some on Sunday and turn
southerly head of the next weather system to approach the region.

This will lead to slightly warmer temperatures during the day
Sunday.

After the brief dry period this weekend, unsettled weather
conditions return late Sunday with periods of rain expected
through at least the first half next week. The models generally
agree with the first system pushing across the region Sunday night
into Monday followed by a 12 to 24 hour break in between weather
systems. Additional widespread rainfall is expected from late
Tuesday into Wednesday with the potential for subsequent systems
to move across the region through late week. The details regarding
timing and location of greatest rainfall remain difficult to pin
down at this time given differences model output. Regardless, the
ensembles point toward an unsettled pattern with periods of
rainfall through much of next week.

Aviation As of 4:44 am pdt Friday... For 12z tafs. With the
exception of sts,VFR conditions were observed at the TAF sites as
of the 12z TAF publication time. As the morning progresses,
ceilings are forecast to drop to MVFR levels as rain shower
chances increase with the next approaching system. In addition to
the lowering ceilings and rain, southerly winds are forecast for
much of the day throughout the bay area. Rain will become more
widespread in the afternoon evening hours the front approaches.

Vicinity of ksfo...VFR conditions were observed as of the 12z taf
issuance, but expect lowering ceilings to MVFR levels over the
next several hours as the next system approaches, initially
accompanied with light rain showers. There will likely be a short
break in the rain late in the morning, but rain will return in the
afternoon. Southeasterly winds are forecast to prevail through the
day, becoming gusty at times this afternoon. Winds will eventually
become west to northwest overnight.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR MVFR conditions are expected as an
approaching system brings increasing clouds to both mry and sns
with southerly winds through the day.

Marine As of 03:11 am pdt Friday... Southerly winds will
increase over the waters through the day as a frontal system
moves across the coastal waters. Winds will become northwesterly
overnight and into Saturday behind the frontal passage. A
moderate long-period swell will arrive over the next 24 hours and
continue through Saturday, bringing hazardous seas to mariners in
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... Pt arena to pigeon pt 10-60 nm
sca... Rough bar advisory for sf bar from 3 pm
public forecast: rgass
aviation: rowe
marine: rowe
visit us at

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
PRYC1 - 9415020 - Point Reyes, CA 13 mi38 min 56°F1019.8 hPa
46237 - San Francisco Bar, CA (142) 15 mi56 min 55°F6 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 16 mi36 min S 9.7 G 12 55°F 56°F1021 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 17 mi45 min Calm 51°F 1021 hPa
RCMC1 - 9414863 - Richmond, CA 18 mi38 min 56°F
FTPC1 - 9414290 - San Francisco, CA 19 mi44 min SSE 1.9 G 2.9 52°F 55°F1021 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi38 min S 9.9 G 11 55°F 1020.9 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 22 mi38 min SE 7 G 8 53°F 1019.6 hPa
PXSC1 22 mi44 min 55°F 48°F
OBXC1 24 mi50 min 54°F 48°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 25 mi38 min SSE 6 G 7
OKXC1 - 9414776 - Oakland (Berth 34), CA 25 mi38 min SSE 4.1 G 6 53°F 1020.8 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 26 mi38 min SW 1.9 G 2.9 52°F 1020.5 hPa
AAMC1 - 9414750 - Alameda, CA 27 mi44 min ESE 7 G 11 54°F 58°F1021.1 hPa
LNDC1 27 mi38 min ESE 7 G 8.9 53°F 1020.7 hPa
UPBC1 33 mi38 min W 4.1 G 5.1
MZXC1 - 9415102 - Martinez-Amorco CA 33 mi38 min SSE 1.9 G 2.9 1020.8 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 35 mi36 min SSW 14 G 18 54°F1019.8 hPa
PCOC1 - 9415144 - Port Chicago, CA 38 mi38 min SSW 2.9 G 7 49°F 56°F1020.8 hPa
46214 - Point Reyes, CA (029) 39 mi56 min 55°F8 ft
SFXC1 - San Francisco Bay Reserve, CA 41 mi71 min W 5.1 48°F 1021 hPa45°F
RTYC1 - 9414523 - Redwood City, CA 43 mi38 min SSE 1.9 G 4.1 50°F 61°F1021.3 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 45 mi38 min WSW 5.1 G 7 52°F 1020.7 hPa

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
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA15 mi81 minN 010.00 miOvercast46°F46°F100%1021.3 hPa
Petaluma Municipal Airport, CA20 mi81 minN 010.00 miOvercast48°F48°F100%1021 hPa

Wind History from DVO (wind in knots)
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
1
AM
2
AM
3
AM
4
AM
5
AM
Last 24hrCalmCalmCalmN5N4CalmN3N8CalmNW8W9
G15
SW10--4
G13
CalmN4CalmCalmCalmCalmCalmCalmCalmCalm
1 day agoSE10
G17
SE9S8SE10
G16
S6SW8SW7SW11SW14SW10SW12W9SW9SW7--W4CalmSW3CalmSW3CalmCalmNE3Calm
2 days agoS6N6CalmS3CalmCalmE4Calm434SE5S4W12SW9SW3
G11
SW5SW9
G15
CalmSW10E3CalmSE5SE12

Tide / Current Tables for Bolinas Lagoon, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Bolinas Lagoon
Click for Map
Fri -- 01:07 AM PDT     4.25 feet High Tide
Fri -- 07:11 AM PDT     Sunrise
Fri -- 07:44 AM PDT     0.14 feet Low Tide
Fri -- 08:31 AM PDT     Moonset
Fri -- 01:23 PM PDT     4.03 feet High Tide
Fri -- 07:24 PM PDT     Sunset
Fri -- 07:57 PM PDT     0.28 feet Low Tide
Fri -- 09:36 PM PDT     Moonrise
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
3.84.24.13.52.61.60.80.20.20.61.52.53.4443.52.71.810.50.30.61.42.4

Tide / Current Tables for Point Reyes, California Current
   EDIT      (on/off)   Help   One Week of Data
Point Reyes
Click for Map
Fri -- 01:44 AM PDT     -0.00 knots Slack
Fri -- 04:33 AM PDT     -1.40 knots Max Ebb
Fri -- 07:12 AM PDT     Sunrise
Fri -- 08:07 AM PDT     0.00 knots Slack
Fri -- 08:32 AM PDT     Moonset
Fri -- 11:03 AM PDT     1.26 knots Max Flood
Fri -- 02:12 PM PDT     -0.00 knots Slack
Fri -- 04:56 PM PDT     -1.29 knots Max Ebb
Fri -- 07:25 PM PDT     Sunset
Fri -- 08:28 PM PDT     0.00 knots Slack
Fri -- 09:38 PM PDT     Moonrise
Fri -- 11:20 PM PDT     1.14 knots Max Flood
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
10.5-0.2-0.9-1.3-1.4-1.1-0.6-0.10.61.11.31.10.70.1-0.6-1.1-1.3-1.1-0.8-0.30.30.81.1

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_P
GOES 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 (7,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Sacramento, CA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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 numerious 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.