Saturday, July22, 2017 L-36.com


Marine Weather and Tides
Stinson Beach, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:04AMSunset 8:28PM Saturday July 22, 2017 7:39 PM PDT (02:39 UTC) Moonrise 4:21AMMoonset 6:58PM Illumination 0% Phase: New Moon; Moon at 29 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- 440 Pm Pdt Sat Jul 22 2017
Tonight..W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 5 ft at 8 seconds. Patchy fog after midnight.
Sun..S winds 10 kt. Wind waves 2 ft or less. NW swell 4 to 6 ft at 8 seconds. Patchy fog in the morning.
Sun night..S winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 5 ft at 9 seconds. Patchy fog after midnight. Patchy drizzle after midnight.
Mon..S winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 6 ft at 9 seconds. Patchy fog in the morning. Patchy drizzle in the morning.
Mon night..S winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 3 to 5 ft at 10 seconds. Patchy fog after midnight. Patchy drizzle after midnight.
Tue..S winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 5 ft. Patchy fog.
Wed..W winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft. Patchy fog.
Thu..W winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft. Patchy fog.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 3 to 5 ft with a dominant swell period of 8 seconds. Across the bar...combined seas 4 to 6 ft with a dominant swell period of 8 seconds. Maximum ebb current of 2.1 knots at 03:06 am Sunday and 1.1 knots at 04:18 pm Sunday.
PZZ500 440 Pm Pdt Sat Jul 22 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure over the eastern pacific will shift to the northwest as a thermal trough extends towards the central coast of california. Winds will begin to decrease for most of the coastal waters. The northern outer waters, however, will remain gusty through the weekend.

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 222327
afdmtr
area forecast discussion
national weather service san francisco bay area
427 pm pdt Sat jul 22 2017

Synopsis Warmer temperatures are expected this afternoon,
especially inland. Temperatures will then begin to moderate on
Sunday as a weak upper level trough begins to develop off our
coast. A more pronounced cooling trend appears on tap for the
first part of next week, with a deepening marine layer and
increased onshore flow. But then by the latter part of the week,
high pressure looks to build back in again resulting in a return
to warming temperatures. Aside from some possible coastal drizzle,
no precipitation is presently expected in our area through the
forecast period.

Discussion As of 1:00 pm pdt Saturday... Visible satellite
reveals mostly clear skies across most of the region with the
exception being along parts of the immediate coastline. The clear
skies and building upper level high pressure will allow for
temperatures to warm this afternoon for interior locations. As of
12 pm pdt, hayward executive airport was already running 8 deg f
warmer than this time yesterday. Additionally, both oakland and
livermore were running 4 deg f warmer than yesterday. Temperatures
aloft are also warming. The 12z oakland sounding from earlier
today indicated a few deg c of warming at 850 mb from yesterday to
today. These are all signs of a warm-to-hot afternoon across
inland areas. We'll likely see the warmest locations surpass the
century mark with forecast high temperatures equating to about 5
to 15 degrees above climatological normals for middle late july.

The upper level ridge will still remain over the area on Sunday,
though a more southerly flow in the boundary layer may aid in
holding afternoon highs down by several degrees compared to today.

This holds particularly so for the north bay valleys where a
marine stratus intrusion is very possible in the morning. Cooling
will be very apparent for all interior locations on Monday when
high temperatures fall by at least 4 to 8 degrees as an upper
level low approaches the northern california coast. This low will
help to enhance southerly flow aloft over the state and bring with
it the potential for increased mid upper-level moisture. Forecast
models generally point to the sierra and deserts with the best
possible shower and thunderstorm potential, though both the gfs
and NAM try to expand the moisture advection to parts of southern
monterey county. In contrast, the ECMWF is keeping the most of mid
upper-level moisture east of the area. With the model uncertainly
and continued inconsistent solutions from run-to-run, will hold
back from introducing thunder potential in the grids. Any westward
shift in this monsoonal moisture would create an increased chance
for thunder potential in our area.

Beyond Wednesday high pressure will again rebuild over the great
basin and will allow for a warming trend to commence for inland
areas into next weekend. This is consistent with the climate
prediction center's 6 to 10 day temperature outlook (valid july
28 to august 1) that points to an increased likelihood of above
normal temperatures across most of the golden state. Meanwhile
through the week, coastal locations will continue to see to the
typical morning low clouds and isolated drizzle.

Aviation As of 4:30 pm pdt Saturday... Upper level high over the
southwestern us extends to california today and has brought a
very warm airmass to the district. The marine layer is shallow at
around 1000 feet. The east-west component of the onshore gradient
has weakened quite a bit. As a result stratus is expected to be
confined to the coastal areas with little inland penetration
except through the golden gate in oak. Clouds in mry bay are
eroding and will have to see if it clears out during the early
evening instead of filling in.

Vicinity of ksfo...VFR. West winds to 15 kt through 04z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR. Ifr CIGS vsby after 06z possibly
later.

Marine As of 12:42 pm pdt Saturday... High pressure over the
eastern pacific will shift to the northwest today as a thermal
trough extends towards the central coast of california. As a
result, winds will begin to decrease for most of the coastal
waters. The northern outer waters, however, will remain gusty
through the weekend.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pigeon pt 10-60 nm
sca... Pt arena to pt reyes 0-10 nm until 3 am
sca... Pigeon pt to pt piedras blancas 10-60 nm until 3 am
sca... Sf bay until 11 pm
public forecast: rowe
aviation: W pi
marine: sims
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 mi70 min 57°F3 ft
FTPC1 - 9414290 - San Francisco, CA 11 mi64 min W 11 G 17 60°F 59°F1010.8 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 11 mi110 min NW 7.8 G 9.7 55°F 58°F5 ft1011.6 hPa (-1.4)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 15 mi64 min WSW 2.9 G 7 73°F 1009.4 hPa
RCMC1 - 9414863 - Richmond, CA 15 mi64 min SSE 4.1 G 6 71°F 61°F1009.7 hPa
PXSC1 15 mi64 min 71°F 54°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 17 mi64 min S 11 G 14 65°F 1010.5 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi64 min N 4.1 G 5.1
OKXC1 - 9414776 - Oakland (Berth 34), CA 18 mi64 min NW 7 G 8.9 64°F 1010.5 hPa
OBXC1 18 mi64 min 69°F 59°F
PRYC1 - 9415020 - Point Reyes, CA 19 mi64 min WNW 11 G 14 60°F 51°F1011.2 hPa
AAMC1 - 9414750 - Alameda, CA 20 mi64 min W 4.1 G 7 76°F 67°F1010.8 hPa
LNDC1 21 mi64 min N 6 G 8 71°F 1010.4 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 26 mi64 min WSW 7 G 8.9 79°F 1009.3 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 32 mi64 min WNW 16 G 17 83°F 71°F1009.2 hPa57°F
RTYC1 - 9414523 - Redwood City, CA 34 mi64 min N 13 G 16 74°F 74°F1009.2 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 35 mi110 min NW 12 G 14 56°F 58°F5 ft1011.4 hPa (-1.1)
PCOC1 - 9415144 - Port Chicago, CA 36 mi64 min W 12 G 14 83°F 72°F1008.7 hPa
SFXC1 - San Francisco Bay Reserve, CA 42 mi115 min W 9.9 91°F 1008 hPa57°F
46214 - Point Reyes, CA (029) 43 mi70 min 53°F7 ft
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 43 mi50 min WNW 7.8 G 12 54°F 52°F5 ft1011.8 hPa53°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 44 mi64 min NW 11 G 14 85°F 1008.4 hPa

Wind History for San Francisco, CA
(wind in knots)    EDIT      (on/off)   Help
8
PM
9
PM
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
Last
24hr
SW6
G11
SW11
G19
SW4
G9
SW7
G13
SW4
G8
SW3
G6
SW5
G9
SW5
G9
SW4
G7
SW8
G11
SW7
G12
W8
G11
W3
G8
W9
G12
W7
W6
G12
SW7
G11
SW5
G13
SW9
G16
SW10
G15
SW9
G15
SW9
G15
W13
G19
W14
G26
1 day
ago
SW15
G19
W12
G19
W12
G16
SW8
G12
S4
S1
G4
SE4
S5
SE2
W1
G4
NW1
SE2
SW4
S5
W8
G12
SW6
G12
W12
G16
SW14
G21
SW15
G22
SW15
G20
SW17
G22
SW17
G25
SW15
G24
SW17
G24
2 days
ago
SW15
G19
SW15
G19
SW12
G17
SW4
G9
S3
S3
SE2
SW4
G9
S3
S4
G8
SW3
G8
SW4
G10
SW7
G10
W4
G9
SW5
G8
SW5
G15
SW12
G18
SW12
G18
SW14
G23
SW17
G25
SW13
G18
SW15
G21
SW14
G18
SW17
G22

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA21 mi65 minN 910.00 miFair86°F53°F33%1009.8 hPa
San Francisco, San Francisco International Airport, CA23 mi44 minWNW 1510.00 miMostly Cloudy75°F48°F40%1009.8 hPa

Wind History from DVO (wind in knots)
8
PM
9
PM
10
PM
11
PM
-12
PM
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
Last 24hrCalmCalmCalm----CalmCalmCalmCalmCalmCalmCalmCalmCalm4Calm54SE65N12N10
G15
N10
G16
N5
G13
1 day agoSW63CalmNE5CalmCalmCalmCalmCalmCalmCalmCalmNE3Calm466SW7S9SW11SW13SW11SW10SW8
2 days ago4SE4CalmNE4CalmCalmCalmCalmCalmCalmCalmCalmNE3CalmCalm6SE7SW14SW13SW11SW13SW12
G19
SW11
G18
SW8

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 -- 05:21 AM PDT     Moonrise
Sat -- 05:56 AM PDT     -0.77 feet Low Tide
Sat -- 06:05 AM PDT     Sunrise
Sat -- 12:18 PM PDT     3.58 feet High Tide
Sat -- 05:42 PM PDT     1.41 feet Low Tide
Sat -- 07:58 PM PDT     Moonset
Sat -- 08:27 PM PDT     Sunset
Sat -- 11:10 PM PDT     4.93 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.33.42.210-0.6-0.8-0.50.31.22.23.13.63.53.12.51.91.51.41.92.73.74.54.9

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 -- 12:22 AM PDT     -0.00 knots Slack
Sat -- 03:41 AM PDT     -5.73 knots Max Ebb
Sat -- 05:20 AM PDT     Moonrise
Sat -- 06:05 AM PDT     Sunrise
Sat -- 07:37 AM PDT     0.01 knots Slack
Sat -- 10:43 AM PDT     4.57 knots Max Flood
Sat -- 02:00 PM PDT     -0.01 knots Slack
Sat -- 04:19 PM PDT     -2.88 knots Max Ebb
Sat -- 07:29 PM PDT     0.00 knots Slack
Sat -- 07:57 PM PDT     Moonset
Sat -- 08:26 PM PDT     Sunset
Sat -- 10:23 PM PDT     3.52 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.8-1.5-3.9-5.4-5.7-4.9-3.5-1.50.93.14.34.53.82.20-1.9-2.8-2.7-2-0.80.92.53.43.3

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for San Francisco/Monterey Bay Area, CA (22,6,7,8)
      (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.