Saturday, May26, 2018 L-36.com


Marine Weather and Tides
Stinson Beach, CA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:50AMSunset 8:23PM Friday May 25, 2018 9:24 PM PDT (04:24 UTC) Moonrise 3:41PMMoonset 2:57AM Illumination 86% Phase: Waxing Gibbous; Moon at 11 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 Point Reyes To Pigeon Point To 10 Nm- 910 Pm Pdt Fri May 25 2018
.small craft advisory in effect from 6 am pdt Saturday through late Saturday night...
Tonight..W winds 10 kt...becoming nw 10 to 20 kt after midnight. Wind waves 3 to 5 ft. W swell 3 to 5 ft at 11 seconds and sw 3 ft at 14 seconds.
Sat..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. Mixed swell nw 4 to 6 ft at 10 seconds and sw 3 ft at 13 seconds.
Sat night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 6 to 8 ft at 10 seconds.
Sun..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 4 to 6 ft at 10 seconds.
Sun night..W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 6 ft at 9 seconds.
Memorial day..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 5 to 7 ft.
Tue..NW winds 20 to 30 kt. Wind waves 3 to 4 ft...increasing to 6 to 8 ft. NW swell 4 to 6 ft.
Wed..NW winds 25 to 35 kt. Combined seas 3 to 14 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 3 to 5 ft with a dominant period of 15 seconds. Across the bar...combined seas 4 to 7 ft with a dominant period of 15 seconds. Maximum ebb current of 3.4 knots at 01:55 am Saturday and 2 knots at 02:07 pm Saturday.
PZZ500 910 Pm Pdt Fri May 25 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwesterly winds will gradually increase tonight into Saturday. Gusty winds will continue through the weekend and into early next week creating steep wind waves and hazardous conditions for small craft. A mixed northwest and southwest swell will continue through the forecast period.

7 Day Forecast for Marine Location Near Stinson Beach CDP, CA
   Hourly   EDIT   Help
location: 37.85, -122.67     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 260407
afdmtr
area forecast discussion
national weather service san francisco bay area
907 pm pdt Fri may 25 2018

Synopsis Dry conditions will return by Saturday. A warming
trend is forecast through the memorial day weekend as high
pressure builds over california. Cooler weather is then expected
to return by the middle of next week as another upper trough
approaches the coast.

Discussion As of 9:05 pm pdt Friday... Latest satellite and 00z
nam initialization indicate the upper low that brought scattered
light showers to our region last night and today is currently
centered over central california, and is drifting slowly to the
southeast. Radar data indicate that isolated showers ended around
sunset. However, the latest hrrr and NAM forecast isolated light
precipitation overnight. Will therefore leave slight shower
chances in the forecast overnight, but most areas will almost
certainly remain dry.

Dry weather is expected in all areas by Saturday morning as the
upper low moves well to our southeast. Moisture wrapping around
the departing upper low may keep some clouds over our area into
the morning hours, but expect mostly sunny skies by afternoon.

Temperatures are forecast to be slightly warmer on Saturday, but
still cooler than normal.

A robust warming trend is then forecast for Sunday and memorial
day as an upper ridge over the eastern pacific builds eastward
over california. 850 mb temperatures are forecast to warm from
about 5 deg c at the present time up to nearly 20 deg c by
Monday. In addition, onshore flow will gradually weaken through
the holiday weekend. Temperatures will warm back to around normal
on Sunday and then several degrees above normal on Monday. Some
of the warmest inland areas are forecast to see high temperatures
in the low to mid 90s by memorial day. Based on the boundary
layer rh forecast from the latest WRF model, we will likely see
areas of low clouds in coastal areas through Sunday, but enough
drying is expected in the boundary layer by Monday for more
widespread coastal clearing.

The models agree that an upper trough will approach from the
northwest on Tuesday. This will likely trigger an increase in
onshore flow and result in cooling at the coast and in the
coastal valleys. However, inland valleys will probably remain warm
into Tuesday. Widespread cooling is then expected by Wednesday of
next week as the trough deepens along the west coast. No
precipitation is expected through next week except for perhaps
night and morning coastal drizzle around midweek.

Aviation As of 4:42 pm pdt Friday... For 00z tafs. Kmux doppler
radar continues to show a few showers across the region therefore
have maintained vcsh in the tafs this afternoon. The chance of
showers will continue to taper. Confidence is low with respect to
cigs as the upper low moves directly over the forecast area this
evening. Anticipate a mixed bag of clouds through tonight with
cigs between 2000 to 5000 ft. Light onshore flow is expected
overnight into Saturday.

Vicinity of ksfo... CIGS remain around 2000 ft occasionally
lifting to 3000 ft. Borderline MVFRVFR conditions will continue
through tonight with broken CIGS temporarily scattering at times
late this afternoon early evening. Moderate southwest winds will
veer increasingly to west this evening. Vcsh due to occasional
weak showers through 04-05z Saturday.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Borderline MVFRVFR CIGS expected to
return around 03z this evening. Moderate winds will ease this
evening. Vcsh due to occasional weak showers through 03z
Saturday.

Marine As of 2:12 pm pdt Friday... Light winds will continue
this afternoon across the waters before increasing and becoming
northwesterly this evening. Winds will remain gusty through the
weekend and into the start of next week. Blustery winds early next
week will generate steep wind waves creating hazardous seas. A
mixed northwest and southwest swell will continue through the
forecast period.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pt reyes 0-10 nm from 9 pm
sca... Pt arena to pigeon pt 10-60 nm from 9 pm
sca... Pigeon pt to pt piedras blancas 10-60 nm from 9 pm
sca... Pt pinos to pt piedras blancas 0-10 nm from 3 am
sca... Pt reyes to pigeon pt 0-10 nm from 9 pm
public forecast: dykema
aviation: cw
marine: as
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
46237 - San Francisco Bar, CA (142) 5 mi55 min 56°F4 ft
FTPC1 - 9414290 - San Francisco, CA 11 mi55 min WSW 6 G 7 55°F 56°F1019.9 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 11 mi45 min NW 1.9 G 3.9 55°F 55°F1020.3 hPa55°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 12 mi62 min SW 8.9 55°F 1020 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 15 mi55 min W 5.1 G 8.9 56°F 1018.6 hPa
PXSC1 15 mi55 min 57°F 54°F
RCMC1 - 9414863 - Richmond, CA 15 mi55 min SW 4.1 G 8 57°F 60°F1019.2 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 17 mi55 min WSW 5.1 G 8.9 58°F 1019.7 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi55 min W 6 G 8.9
OBXC1 18 mi55 min 57°F 54°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 18 mi55 min WNW 7 G 8 56°F 1019.6 hPa
PRYC1 - 9415020 - Point Reyes, CA 19 mi55 min W 1.9 G 1.9 55°F1019.5 hPa
AAMC1 - 9414750 - Alameda, CA 20 mi55 min W 8 G 9.9 57°F 63°F1019.8 hPa
LNDC1 21 mi55 min W 6 G 8.9 58°F 1019.5 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 26 mi55 min SW 8.9 G 12 59°F 1018.8 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 32 mi55 min SW 6 G 8 58°F 64°F1019.1 hPa56°F
RTYC1 - 9414523 - Redwood City, CA 34 mi55 min WNW 8 G 9.9 58°F 64°F1019.8 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 35 mi95 min E 1.9 G 3.9 55°F 55°F5 ft1019.2 hPa (-0.4)
PCOC1 - 9415144 - Port Chicago, CA 36 mi55 min SW 5.1 G 7 57°F 64°F1018.9 hPa
SFXC1 - San Francisco Bay Reserve, CA 42 mi100 min WNW 8.9 60°F 1018 hPa53°F
46214 - Point Reyes, CA (029) 43 mi55 min 56°F6 ft
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 43 mi45 min NNW 18 G 23 55°F 1020 hPa52°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 44 mi55 min W 5.1 G 8 60°F 1018.7 hPa

Wind History for San Francisco, CA
(wind in knots)    EDIT      (on/off)   Help
10
PM
11
PM
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
Last
24hr
SW3
G6
SW4
SW3
S3
SW2
G6
SW4
S4
G7
SW4
G7
SW3
SW4
G7
SW6
G10
SW5
G10
W6
G13
SW5
G11
SW4
G11
W7
G12
SW9
G14
W7
G13
W9
G13
SW8
G14
W9
G12
W5
G8
W6
G9
W5
1 day
ago
W5
W4
G7
W4
W3
G7
W4
W4
SW3
G6
W3
G6
W3
G7
W5
SW3
G7
SW3
G9
W5
W5
G9
SW7
G10
SW6
G11
SW7
G11
SW4
G8
SW6
G11
SW8
G12
SW10
G15
SW3
G10
W5
G8
W2
G5
2 days
ago
SW3
G7
S3
SW2
G8
SW8
G11
SW5
W6
SW6
G12
W6
G11
W9
G14
W8
G13
SW7
G11
W6
G11
W8
G13
W6
G13
W5
G9
W5
G8
W7
G10

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA21 mi30 minN 010.00 miFair57°F51°F82%1019.3 hPa
San Francisco, San Francisco International Airport, CA23 mi29 minSW 610.00 miMostly Cloudy59°F50°F72%1019.6 hPa

Wind History from DVO (wind in knots)
10
PM
11
PM
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
Last 24hrSW6SW74--W6SW6SW5
G10
SW4SW5S6S5S6SW64SW5SW7SW83CalmCalm354Calm
1 day agoCalm--SW5--SW103W9
G15
NW565CalmW5SW8SW8SW9SW12W7
G15
SW12SW15W10
G22
SW11SW10
G16
SW7SW6
2 days ago4SW8SW3SW6SW8W7
G14
CalmSW95W3SW3SW4W8SW8SW9
G14
SW9W9SW12W8
G14
W8
G14
64
G13
5
G13
4
G10

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
Sat -- 04:28 AM PDT     Moonset
Sat -- 04:55 AM PDT     0.06 feet Low Tide
Sat -- 05:52 AM PDT     Sunrise
Sat -- 10:37 AM PDT     3.09 feet High Tide
Sat -- 04:33 PM PDT     0.82 feet Low Tide
Sat -- 05:41 PM PDT     Moonrise
Sat -- 08:23 PM PDT     Sunset
Sat -- 10:22 PM PDT     4.23 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.22.41.40.70.20.10.30.91.72.533.12.82.31.71.20.90.91.322.93.74.24.2

Tide / Current Tables for San Francisco Bay Entrance (Golden Gate), California Current
   EDIT      (on/off)   Help   One Week of Data
San Francisco Bay Entrance (Golden Gate)
Click for Map
Sat -- 02:46 AM PDT     -4.21 knots Max Ebb
Sat -- 04:27 AM PDT     Moonset
Sat -- 05:52 AM PDT     Sunrise
Sat -- 06:27 AM PDT     0.00 knots Slack
Sat -- 09:30 AM PDT     3.57 knots Max Flood
Sat -- 12:23 PM PDT     -0.01 knots Slack
Sat -- 03:07 PM PDT     -2.92 knots Max Ebb
Sat -- 05:40 PM PDT     Moonrise
Sat -- 06:24 PM PDT     0.00 knots Slack
Sat -- 08:22 PM PDT     Sunset
Sat -- 09:23 PM PDT     3.35 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1-2.9-4-4.2-3.8-2.7-0.91.12.73.53.52.60.8-1.2-2.5-2.9-2.7-2-0.71.12.63.33.22.3

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 (0,6,7,8)
      (on/off)   Help

Ground Weather Radar Station San Francisco Bay Area, 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.