Tuesday, May23, 2017 L-36.com


Marine Weather and Tides
San Rafael, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:51AMSunset 8:22PM Tuesday May 23, 2017 1:51 AM PDT (08:51 UTC) Moonrise 3:39AMMoonset 5:00PM Illumination 6% Phase: Waning Crescent; Moon at 27 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
PZZ530 San Pablo Bay Suisun Bay The West Delta And San Francisco Bay North Of The Bay Bridge- 944 Pm Pdt Mon May 22 2017
.small craft advisory in effect from Tuesday afternoon through Tuesday evening...
Tonight..SW winds 10 to 20 kt.
Tue..SW winds 5 to 15 kt...increasing to 15 to 25 kt with a few gusts to 30 kt in the afternoon.
Tue night..SW winds 15 to 30 kt...decreasing to 10 to 20 kt near midnight. Patchy fog after midnight.
Wed..SW winds 10 to 20 kt...increasing to 15 to 25 kt in the afternoon. Patchy fog in the morning.
Wed night..SW winds 15 to 25 kt.
Thu..SW winds 10 to 20 kt.
Fri..SW winds 5 to 15 kt.
Sat..SW winds 5 to 15 kt.
PZZ500 944 Pm Pdt Mon May 22 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Surface high pressure over the eastern pacific will strengthen from tonight into Wednesday morning keeping northwesterly winds going over the outer waters. A surface ridge of high pressure over the central coast will cause winds over the inner coastal waters to be primarily light southwesterly through Tuesday. Except for the Monterey bay onshore winds will be gusty over the bays each afternoon and evening at least through mid-week.

7 Day Forecast for Marine Location Near San Rafael, CA
   Hourly   EDIT   Help
location: 37.98, -122.47     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 230528
afdmtr
area forecast discussion
national weather service san francisco bay area
1028 pm pdt Mon may 22 2017

Synopsis Look for cooler conditions through most of the week as
a onshore flow combines with the marine layer. Minor warming is
then expected during the upcoming weekend especially for inland
locations.

Discussion As of 9:00 pm pdt Monday... No forecast updates
planned for this evening with about a 1500 foot marine layer in
place along the immediate coast. Low clouds making their way
through the golden gate and into the berkeley hill as well as
spreading inland around the monterey bay region. Inland areas that
reached the 90s today will see more significant cooling for
Tuesday as onshore flow continues to increase with a deepening
marine layer in response to upper troughing aloft.

All available MOS data suggests continued cooling trend through
midweek for inland areas with robust onshore winds in place and
likely persistent stratus around the coast and bays. The trend
will be for near or below normal temperatures for much of the rest
of the work week.

Looking ahead to the long holiday weekend, long range models
suggest a seasonable weather pattern with dry and near normal
temps.

Prev discussion As of 1:15 pm pdt Monday... As expected temperatures
are running cooler for all locations away from the coast today
with many spots 5 to 12 degrees less than values from Sunday.

Current readings show a wide range from 50s and 60s to parts of
the coast with 70s and 80s inland. Still a few hours of heating,
so would expect the warmest inland spots to again get into the
90s, however the number of locations should be less than
yesterday. Satellite shows widespread clouds along the water and
with the minor onshore flow expected to continue, likely that many
of the local beaches will see little to no sunshine today.

Tonight will be a near repeat of last night with patchy fog along
the coast and to some inland spots. Lows will mostly be in the 50s
with 60s above 1500 feet.

Synoptically the ridge of high pressure in charge will begin to
flatten out through the week as a system dives down from canada
and works into the northern rockies. 500 mb heights will drop from
587 dm today to 573 dm by Thursday. Inland locations that have
been in the 90s the past few days will drop back into the upper
60s to the lower 70s. Closer to the coast widespread mid 50s to
mid 60s can be expected. With the onshore flow in place, much of
the week could by quite grey at the coast.

Longer range guidance shows the ridge trying to rebuild by the
weekend although heights will be less than the past few days. By
Sunday inland spots will be back in the mid 70s to mid 80s away
from the coast with 60s to mid 70s near the water.

Aviation As of 10:27 pm pdt Monday... Stratus and fog are
heavily blanketing the immediate coast with some stratus and fog
reaching through the golden gate this evening; ifr CIGS and vsbys
are forecast to continue in these areas tonight and Tuesday morning.

The marine layer depth ranges from approx 1,000 feet bay area to
1,500 north central coast. 925 mb temperatures remain nearly
unchanged over the bay area and cool less than 1c over the central
coast tonight thus the marine layer depth should remain nearly
unchanged overnight, possibly including Tuesday as well.

Gusty onshore winds are likely over the san francisco bays Tuesday
afternoon and evening, similarly gusty winds are expected again
Wednesday. Lower level cooling will become more robust by this
time Tuesday evening through Wednesday thus the marine layer depth
should increase and stratus and fog intrusion should then really
get underway.

A little more than moderate confidenceVFR persists for most of the
bay area terminals tonight with exception of southerly flow bringing
lifr/vlifr CIGS and vsbys to ksts late tonight and Tuesday morning.

For monterey bay area ifr/lifr will continue into Tuesday morning.

Vicinity of ksfo...VFR. W-nw winds 5-10 knots tonight, becoming gusty
from the w-nw Tuesday afternoon and evening.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Ifr/lifr prevails tonight into late Tuesday
morning.VFR returns late Tuesday morning and afternoon, onshore winds
will likely bring stratus and fog back in Tuesday evening.

Marine As of 9:45 pm pdt Monday... Surface high pressure over
the eastern pacific will strengthen from tonight into Wednesday
morning keeping northwesterly winds going over the outer waters. A
surface ridge of high pressure over the central coast will cause
winds over the inner coastal waters to be primarily light
southwesterly through Tuesday. Except for the monterey bay onshore
winds will be gusty over the bays each afternoon and evening at
least through mid-week.

Mtr watches/warnings/advisories
Tngt None.

Public forecast: rww
aviation/marine: canepa
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
RCMC1 - 9414863 - Richmond, CA 5 mi52 min WSW 1.9 G 5.1 54°F 59°F1014.2 hPa (+0.0)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 6 mi50 min NW 1.9 53°F 1014 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 8 mi52 min SSW 12 G 16 53°F 1014.7 hPa (+0.0)
FTPC1 - 9414290 - San Francisco, CA 12 mi52 min SW 2.9 G 12 52°F 53°F1015.1 hPa (+0.0)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 12 mi52 min W 9.9 G 12 57°F 1013.5 hPa (+0.0)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 13 mi52 min SW 1.9 G 4.1 54°F 1013.6 hPa (+0.0)
PXSC1 13 mi52 min 54°F 54°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 14 mi52 min WNW 4.1 G 5.1 54°F 1014.7 hPa (+0.0)
OBXC1 14 mi52 min 55°F 53°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 14 mi52 min SW 7 G 7
46237 - San Francisco Bar, CA (142) 16 mi52 min 54°F4 ft
LNDC1 16 mi52 min W 4.1 G 5.1 56°F 1014.5 hPa (+0.0)
AAMC1 - 9414750 - Alameda, CA 17 mi52 min W 2.9 G 5.1 55°F 64°F1015 hPa (+0.0)
UPBC1 19 mi52 min NW 11 G 14
MZXC1 - 9415102 - Martinez-Amorco CA 19 mi52 min WNW 12 G 14 58°F 64°F1013.6 hPa (+0.0)57°F
PCOC1 - 9415144 - Port Chicago, CA 23 mi52 min WSW 12 G 16 61°F 66°F1013 hPa (+0.0)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 25 mi62 min S 5.8 G 5.8 50°F 54°F4 ft1015.3 hPa (+0.0)
PRYC1 - 9415020 - Point Reyes, CA 27 mi52 min SE 4.1 G 7 53°F 56°F1014.7 hPa (+0.0)
SFXC1 - San Francisco Bay Reserve, CA 28 mi67 min W 8 60°F 1013 hPa54°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 31 mi52 min NW 9.9 G 13 66°F 1012 hPa (-0.4)
RTYC1 - 9414523 - Redwood City, CA 35 mi52 min NW 5.1 G 5.1 58°F 70°F1013.9 hPa (+0.0)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 48 mi62 min SW 5.8 G 7.8 51°F 55°F4 ft1015 hPa (+0.3)
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 48 mi42 min SE 3.9 G 5.8 47°F 50°F1015.3 hPa47°F

Wind History for Richmond, CA
(wind in knots)    EDIT      (on/off)   Help
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
1
AM
Last
24hr
S3
G7
S3
W3
SW2
W1
W2
S3
S4
S5
S4
S6
S4
S5
SE3
G6
SE3
G6
SE4
SE3
G6
S3
NW2
G5
W4
E2
G5
S7
G10
S7
G10
W2
G5
1 day
ago
S7
G12
S6
G11
W2
N1
S1
G4
E1
S2
SE1
SE3
SE3
SE4
S4
S6
G9
S5
SE3
SE3
G6
SE4
G8
SE4
G8
SE3
G6
E3
W3
--
S2
S1
G4
2 days
ago
S6
G9
SW4
N2
SE3
S3
S3
S5
S6
SE2
SE4
SE5
G8
SE4
SE4
SE2
G5
SE3
E3
SE3
S5
SE5
S9
S8
G11

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA12 mi57 minNNW 710.00 miFair52°F50°F94%1014.6 hPa
Napa, Napa County Airport, CA19 mi58 minSSW 910.00 miFair57°F53°F87%1013.3 hPa
Concord, Buchanan Field, CA22 mi59 minNNW 410.00 miFair61°F55°F81%1012 hPa
Oakland, Metro Oakland International Airport, CA23 mi59 minWNW 710.00 miA Few Clouds57°F54°F90%1014.6 hPa

Wind History from DVO (wind in knots)
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
1
AM
2
AM
Last 24hrN6N6N8N6N6N6N5N5CalmCalmCalm334N12N12N10N12N10N10N10N9--N8
1 day agoCalmCalmCalmCalmN5N5CalmCalmCalmCalm5Calm6NE6N8N10N10N11N4
G10
N6N9N7N10N6
2 days agoCalmN3CalmNW3CalmCalmCalmCalmCalm35SE5E54W105
G14
N135
G13
N4N6N5N5N4NW3

Tide / Current Tables for Point San Quentin, San Francisco Bay, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Point San Quentin
Click for Map
Tue -- 04:38 AM PDT     Moonrise
Tue -- 05:04 AM PDT     -0.13 feet Low Tide
Tue -- 05:53 AM PDT     Sunrise
Tue -- 11:30 AM PDT     4.54 feet High Tide
Tue -- 04:49 PM PDT     1.12 feet Low Tide
Tue -- 05:59 PM PDT     Moonset
Tue -- 08:20 PM PDT     Sunset
Tue -- 11:09 PM PDT     6.23 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.242.61.20.2-0.10.10.91.933.94.54.53.9321.31.11.62.53.74.95.86.2

Tide / Current Tables for Point San Pablo Midchannel, San Pablo Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Point San Pablo Midchannel
Click for Map
Tue -- 12:21 AM PDT     -0.00 knots Slack
Tue -- 03:31 AM PDT     -2.96 knots Max Ebb
Tue -- 04:38 AM PDT     Moonrise
Tue -- 05:53 AM PDT     Sunrise
Tue -- 07:24 AM PDT     0.00 knots Slack
Tue -- 10:16 AM PDT     1.74 knots Max Flood
Tue -- 01:16 PM PDT     -0.00 knots Slack
Tue -- 03:41 PM PDT     -1.88 knots Max Ebb
Tue -- 05:59 PM PDT     Moonset
Tue -- 06:39 PM PDT     0.00 knots Slack
Tue -- 08:20 PM PDT     Sunset
Tue -- 09:43 PM PDT     2.52 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.4-1-2.2-2.9-2.9-2.5-1.7-0.50.61.41.71.61.10.3-0.9-1.7-1.9-1.5-0.70.41.52.32.52

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 (4,6,7,8)
      (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.