Thursday, August17, 2017 L-36.com


Marine Weather and Tides
Bodega Bay, 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 6:27AMSunset 8:02PM Thursday August 17, 2017 8:16 AM PDT (15:16 UTC) Moonrise 1:09AMMoonset 3:49PM Illumination 22% Phase: Waning Crescent; Moon at 25 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 Point Arena To Point Reyes To 10 Nm- 253 Am Pdt Thu Aug 17 2017
Today..SE winds 5 kt...becoming W in the afternoon. Wind waves 2 ft or less. NW swell 5 to 7 ft at 11 seconds. Patchy fog in the morning.
Tonight..NW winds 10 kt. Wind waves 2 ft or less. NW swell 5 to 6 ft at 13 seconds. Patchy fog after midnight.
Fri..SW winds 10 kt. Wind waves 2 ft or less. NW swell 5 to 6 ft at 12 seconds. Patchy fog in the morning.
Fri night..W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 5 to 7 ft at 11 seconds. Patchy fog after midnight.
Sat..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 6 to 8 ft at 11 seconds. Patchy fog.
Sun..W winds 5 to 15 kt. Wind waves 1 to 3 ft...becoming 2 ft or less. NW swell 7 to 9 ft. Patchy fog.
Mon..SW winds 5 kt. Wind waves 2 ft or less. NW swell 5 to 7 ft. Patchy fog.
PZZ500 253 Am Pdt Thu Aug 17 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light variable winds through the day as an east pacific ridge builds inland to the north while a weak trough lingers just to the south. Expect increasing northwest winds beginning late tomorrow and lasting through the weekend as the ridge strengthens further.

7 Day Forecast for Marine Location Near Bodega Bay, CA
   Hourly   EDIT   Help
location: 38.31, -123.07     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 171150
afdmtr
area forecast discussion
national weather service san francisco bay area
450 am pdt Thu aug 17 2017

Synopsis A gradual inland warming trend can be expected through
late week as high pressure builds over the region. Overnight and
morning clouds will also be common, especially near the coast and in
the adjacent valleys.

Discussion As of 4:14 am pdt Thursday... Skies are clear thus far
over most of napa county, parts of the east bay and south bay, san
benito and interior monterey counties while stratus and fog blanket
the bays and the rest of the coast early this morning. The marine
layer depth is holding steady at 2,000 feet.

The marine inversion is fairly well developed and further strengthening
occurs today into Saturday as increasing subsidence in advance of a
594 decameter closed mid-upper level high centered approx 700 miles
west of the bay area produces large scale sinking and adiabatic warming.

Thermal ridging coincides with geopotential height ridging over norcal
today into at least the first part of the weekend, and per most recent
nam model output warming becomes focused over inland valleys and hills
especially over the bay area counties, and in particular over the north
bay Friday and Saturday. 925 mb level temperatures reach 28c over
north bay tonight and then 30c Friday night meaning temperatures in
the north bay hills and mountains will most likely hover in the
lower to middle 80s all night as the marine layer becomes
increasingly squashed under high pressure. With this in mind, am not
having a whole lot of confidence in daytime maximum temperature
guidance especially for north bay and east bay areas Friday and
Saturday; 90s to near 100 will probably be more common even closer
to the bays as the marine layer becomes increasingly compressed.

Eventually an active mid latitude zonal jet stream crossing the
lower 48 buckles ever so slightly causing a weak and slowly sw
moving upper level trough to form over the west coast and east
pacific by late this weekend into early next week. Model output has
been consistent with showing lower to mid level thermal ridging
weakening over the forecast area while this trough develops, however
with a solidly strong position to start there'll still be remnants
of it to persisting causing the marine layer to persist Sunday into
Monday. At the same time much drier 925 mb rhs sweep in from the
northwest over the weekend probably mixing into the marine based
clouds with a tendency for lower level winds, and possibly surface
winds to go from onshore to having a weak southerly component. The
question is how will all of this influence the marine layer early
next week? It's just a guess that there could be an earlier than
usual clearing Monday morning.

For mid-late next week, a very deep low pressure area develops over
the gulf of alaska. The ecmwf, gfs, gem have been lean toward weak
long-wave troughing over the west coast. The southern extent of the
gulf of alaska low arrives as a trough bringing more pronounced
cooling and increasing onshore winds. Coastal drizzle is a possibility
in a deepening or even possibly a fully mixed out marine layer.

Aviation As of 4:50 am pdt Thursday... Building east pacific
basin ridge continues to compress marine layer this morning. Fort
ord profiler shows a top of approximately 1800 feet with a base
around 800 feet, while the cloud thickness satellite imagery is
estimated to be around 1000 feet. Latest goesr nighttime
microphysics imagery shows the stratus deck rapidly expanding
across the san francisco and monterey bay areas early this
morning. Expect to see these clouds continue to thicken up and
expand through dawn before quickly mixing out between 16-17z.

Marine layer will continue to compress tonight with slightly lower
cigs and less thickness overall. Light winds today, increasing
tomorrow.

Vicinity of ksfo... MVFR CIGS through sunrise, then dissipating
between 15-16z. Light northerly morning winds shifting to become
breezy and out of the west by the afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR CIGS through 17-18z. Ifr cigs
possible tonight beginning as early as 02-03z.

Marine As of 04:43 am pdt Thursday... Light variable winds
through the day as an east pacific ridge builds inland to the
north while a weak trough lingers just to the south. Expect
increasing northwest winds beginning late tomorrow and lasting
through the weekend as the ridge strengthens further.

Mtr watches warnings advisories
Tday Sca... Sf bay from 1 pm
public forecast: canepa
aviation: drp
marine: drp
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
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 14 mi37 min SE 1.9 G 3.9 55°F 53°F1016.2 hPa55°F
PRYC1 - 9415020 - Point Reyes, CA 22 mi47 min SE 8 G 9.9 62°F 58°F1015.5 hPa
46214 - Point Reyes, CA (029) 33 mi47 min 62°F6 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 40 mi87 min SSE 3.9 G 5.8 58°F 56°F5 ft1015.7 hPa (+0.3)
46237 - San Francisco Bar, CA (142) 43 mi47 min 59°F4 ft
RCMC1 - 9414863 - Richmond, CA 44 mi47 min WSW 6 G 8 60°F 65°F1015.8 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 44 mi55 min Calm 59°F 1016 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 46 mi47 min WSW 7 G 11 61°F 1015.5 hPa
FTPC1 - 9414290 - San Francisco, CA 47 mi47 min WSW 5.1 G 8 59°F 62°F1016.3 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 47 mi47 min W 4.1 G 7 61°F 1016.2 hPa

Wind History for Point Reyes, CA
(wind in knots)    EDIT      (on/off)   Help
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
6
AM
7
AM
Last
24hr
SW1
SE3
SE3
G8
SE7
G12
SE3
G8
SE7
G10
SE7
G10
SE9
E9
G12
E5
G9
E6
G9
SE5
G8
E4
SE1
G4
SE4
E5
G8
SE3
G10
E6
G9
SE2
G6
E5
G8
SE6
E6
G9
SE4
G9
SE7
G10
1 day
ago
W3
W5
SE2
N2
SE3
E4
NW5
G8
NW12
G15
NW8
G11
W6
G10
NW8
W11
G15
W8
W6
G10
W3
E1
S1
G4
SE1
S1
--
SW1
E1
S3
SE1
G4
2 days
ago
W16
NW14
G19
NW12
G16
W10
G15
NW11
G15
W11
G15
W8
G13
W10
G14
W11
G15
W10
G14
W10
G14
W11
G14
W7
G11
W10
G13
W8
G12
W9
G12
W11
G17
W13
G16
W11
G16
W10
G15
NW12
G16
NW11
NW7
NW5
G9

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa, Santa Rosa Sonoma County Airport, CA20 mi24 minNNW 34.00 miFog/Mist58°F55°F90%1015.2 hPa

Wind History from STS (wind in knots)
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
6
AM
7
AM
Last 24hrCalm3S343Calm3S10S11S10S12S9S10S6SE4S4S3SW53CalmCalmN3CalmCalm
1 day agoCalmCalmCalm--S65SE6S8S11S13S12SE13SE10SE8S6S3SE4S3S3S5S3S43Calm
2 days agoCalmS5S5S6S8S8S11S9SE11S10SE12SE9S8S7S5S5S3CalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Bodega Harbor entrance, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Bodega Harbor entrance
Click for Map
Thu -- 02:08 AM PDT     0.17 feet Low Tide
Thu -- 02:08 AM PDT     Moonrise
Thu -- 06:28 AM PDT     Sunrise
Thu -- 08:56 AM PDT     4.29 feet High Tide
Thu -- 01:49 PM PDT     2.67 feet Low Tide
Thu -- 04:48 PM PDT     Moonset
Thu -- 07:49 PM PDT     6.29 feet High Tide
Thu -- 08:02 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.20.50.20.30.91.72.63.54.14.34.13.73.22.82.733.74.65.56.16.35.953.7

Tide / Current Tables for Point Reyes, California Current
   EDIT      (on/off)   Help   One Week of Data
Point Reyes
Click for Map
Thu -- 02:09 AM PDT     Moonrise
Thu -- 03:27 AM PDT     0.00 knots Slack
Thu -- 06:29 AM PDT     Sunrise
Thu -- 06:31 AM PDT     0.95 knots Max Flood
Thu -- 09:46 AM PDT     -0.00 knots Slack
Thu -- 11:56 AM PDT     -0.61 knots Max Ebb
Thu -- 03:16 PM PDT     0.00 knots Slack
Thu -- 04:48 PM PDT     Moonset
Thu -- 06:10 PM PDT     0.78 knots Max Flood
Thu -- 08:02 PM PDT     Sunset
Thu -- 09:03 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.2-1-0.7-0.20.30.70.90.90.80.4-0.1-0.5-0.6-0.5-0.3-0.10.30.60.80.70.50-0.6-1.1

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 (11,2,3,4)
      (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.