Saturday, May27, 2017 L-36.com


Marine Weather and Tides
San Francisco, CA

Version 3.4
What's New / NOTES
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 5:49AMSunset 8:24PM Saturday May 27, 2017 8:48 AM PDT (15:48 UTC) Moonrise 6:55AMMoonset 9:36PM Illumination 5% Phase: Waxing Crescent; Moon at 2 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
PZZ531 San Francisco Bay South Of The Bay Bridge- 317 Am Pdt Sat May 27 2017
.small craft advisory in effect from Sunday morning through late Sunday night...
Today..NW winds 5 kt...becoming west 5 to 15 kt in the afternoon. Patchy fog in the morning.
Tonight..W winds 5 to 15 kt.
Sun..W winds 10 kt...increasing to 15 to 25 kt in the afternoon.
Sun night..W winds 15 to 25 kt.
Memorial day..W winds 10 to 20 kt.
Tue..W winds 10 kt.
Wed..W winds 5 to 15 kt.
PZZ500 317 Am Pdt Sat May 27 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light west winds through the morning. Northwest winds will begin to increase later today and through the memorial day weekend as high pressure builds offshore. The swell train will be generally 5 foot or less through the forecast period so wind waves will dominate the sea state.

7 Day Forecast for Marine Location Near San Francisco, CA
   Hourly   EDIT   Help
location: 37.81, -122.44     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 271151
afdmtr
area forecast discussion
national weather service san francisco bay area
451 am pdt Sat may 27 2017

Synopsis Dry with seasonable temperatures for much of the
holiday weekend. The next trough and associated cooling trend
arrives Tuesday and Wednesday with long range trends indicating
dry and benign weather pattern.

Discussion As of 4:00 am pdt Saturday... Cloud coverage is much
more patchy this morning compared to 24 hours ago with profiler
data showing a weak inversion above 4000 feet. At this time clouds
are most numerous around sf bay, marin county and the santa clara
valley. Clouds will likely continue to expand through sunrise but
given the patchy nature inland and cooling aloft expect skies to
turn mostly sunny much earlier today as high pressure builds. The
increased sunshine will lead to a noted warming trend today,
especially after such a cool Friday where most climate sites
stayed in the 60s or struggled to reach around 70 even inland. It
should be a nice start to the holiday weekend with widspread 70s
away from the coast and even some lower 80s for the warmest inland
spots while the coast should see peaks of sunshine with beach
temps in the lower 60s.

High pressure will nose over the region on Sunday with 850 mb
temps this morning around 12 celsius approaching 18 celsius inland
on Sunday afternoon. This should lead to a pronounced warming
trend for inland areas with more widespread 80s.

In general weather should be nice for memorial day but increasing
onshore flow ahead of the next trough will likely bring some gusty
west winds to the beaches with increased marine clouds. Inland
areas should enjoy another sunny and seasonably warm afternoon on
Monday for those looking to enjoy outdoor activities.

A fairly well defined upper trough will approach CAPE mendocino by
early Tuesday morning and likely bring some coastal drizzle and
increased marine push of clouds for Tuesday morning. In addition
temperatures will trend cooler again with a synoptically cooler
airmass aloft. Surface pressure gradients will increase such that
breezy west winds are forecast both Tuesday and weds in what will
likely be a fairly cool end to the month.

Ecmwf shows dry with high pressure for the start of june into the
first weekend of the month.

Aviation As of 4:45 am pdt Saturday... Stratus deck retreated
offshore late last evening and has slowly been building back
towards the coast over the last few hours. A mixed bag ofVFR to
MVFR CIGS currently, but expect to see deteriorating ceilings up
to and around sunrise, then persist around those levels for around
an hour or two into the morning. Otherwise, light winds today,
with some breezy west winds along the immediate coastline by the
afternoon. For tonight, subsidence aloft will contribute to a
compressed marine layer, reducing the inland intrusion extent,
but bringing much lower lifr to ifr cigs. In addition, onshore
winds increase tomorrow.

Vicinity of ksfo... Stratus deck expanding and thickening during
the pre dawn hours. CurrentlyVFR but would not be surprised to
see MVFR by 12-13z... Persisting into or just beyond sunrise. Low
confidence due to discontinuity of marine layer and lack of
persistence guidance.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Patchy CIGS in the predawn hours will
become increasingly lower and more widespread as additional
moisture is advected onshore. MVFR CIGS by sunrise, which will
linger into the mid morning. Model guidance is sketchy on a return
time of stratus for later today, with a return possible as early
as 01z. Light onshore winds.

Marine As of 04:43 am pdt Saturday... Light west winds through
the morning. Northwest winds will begin to increase later today
and through the memorial day weekend as high pressure builds
offshore. The swell train will be generally 5 foot or less
through the forecast period so wind waves will dominate the sea
state.

Mtr watches warnings advisories
Tday Sca... Pt pinos to pt piedras blancas 0-10 nm from 3 pm
sca... Mry bay from 3 pm
public forecast: rww
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
FTPC1 - 9414290 - San Francisco, CA 1 mi49 min SSW 5.1 G 7 53°F 56°F1019.4 hPa (+1.3)
PXSC1 2 mi49 min 55°F 48°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 3 mi49 min SE 7 G 12 54°F 1017.9 hPa (+1.1)
OBXC1 5 mi49 min 55°F 48°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 6 mi57 min W 1 53°F 1019 hPa (+1.0)
OKXC1 - 9414776 - Oakland (Berth 34), CA 6 mi49 min SW 7 G 8.9 55°F 1019.2 hPa (+1.3)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 6 mi49 min SSW 9.9 G 11
RCMC1 - 9414863 - Richmond, CA 8 mi49 min SSW 7 G 11 54°F 59°F1018.9 hPa (+1.3)
AAMC1 - 9414750 - Alameda, CA 8 mi49 min WSW 6 G 8.9 55°F 63°F1019.6 hPa (+1.3)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 8 mi49 min SSW 6 G 9.9 56°F 1019.3 hPa (+1.3)
LNDC1 8 mi49 min SW 7 G 11 55°F 1019.1 hPa (+1.3)
46237 - San Francisco Bar, CA (142) 10 mi49 min 55°F4 ft
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 19 mi49 min WSW 8 G 12 55°F 1018.7 hPa (+1.3)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 21 mi59 min N 1.9 G 3.9 53°F 53°F4 ft1019.2 hPa (+1.4)
MZXC1 - 9415102 - Martinez-Amorco CA 23 mi49 min WSW 8 G 9.9 55°F 63°F1019.1 hPa (+1.2)52°F
UPBC1 23 mi49 min W 9.9 G 12
RTYC1 - 9414523 - Redwood City, CA 24 mi49 min Calm G 2.9 56°F 66°F1018.7 hPa (+1.3)
PCOC1 - 9415144 - Port Chicago, CA 27 mi49 min SW 8 G 11 56°F 64°F1018.6 hPa (+1.2)
PRYC1 - 9415020 - Point Reyes, CA 31 mi49 min E 1.9 G 4.1 55°F 55°F1018.7 hPa (+1.3)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi49 min WNW 12 G 17 57°F 1018 hPa (+1.1)
SFXC1 - San Francisco Bay Reserve, CA 35 mi64 min W 8 56°F 1018 hPa51°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 39 mi59 min SSW 1.9 G 3.9 55°F 55°F5 ft1018.8 hPa (+1.3)

Wind History for San Francisco, CA
(wind in knots)    EDIT      (on/off)   Help
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
8
AM
Last
24hr
W6
G9
W6
G9
W7
G14
W7
W6
G11
W7
G11
W7
G11
W7
G13
SW10
G13
W10
G13
W7
G10
SW5
G10
W4
G9
SW4
G8
SW1
G4
SW2
G5
SW3
SW3
G6
W3
G8
SW2
SW2
G5
--
SW3
G7
SW5
1 day
ago
S6
G15
SW9
G19
W6
G11
W10
G14
W9
G16
SW7
G12
W8
G15
W11
G15
SW10
G15
SW9
G15
SW6
G17
SW10
G14
SW9
G15
SW9
G13
SW8
G13
W4
G9
SW5
G9
SW5
G9
W6
SW3
G6
SW4
SW3
G6
W3
G7
W4
2 days
ago
SW8
G13
SW6
G11
SW5
G9
SW7
G11
SW11
G19
SW8
G15
SW8
G20
SW9
G19
W10
G20
W12
G17
W13
G20
SW9
G15
SW9
G18
SW6
G15
SW9
G14
SW8
G13
SW8
G14
W9
G14
SW8
G11
SW11
G16
W6
G10
SW8
G13
SW7
G11
SW9
G12

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA14 mi53 minSW 610.00 miOvercast56°F46°F70%1019.1 hPa
Oakland, Metro Oakland International Airport, CA14 mi56 minWSW 710.00 miOvercast58°F48°F72%1019.3 hPa
Hayward, Hayward Air Terminal, CA20 mi55 minWSW 610.00 miOvercast58°F45°F62%1020 hPa
Half Moon Bay Airport, CA21 mi54 minSW 38.00 miOvercast55°F48°F77%1019.3 hPa
San Carlos Airport, CA22 mi62 minN 010.00 miMostly Cloudy55°F48°F77%1019.3 hPa
Novato / Gnoss Field, CA24 mi54 minN 010.00 miOvercast55°F48°F77%1019.3 hPa
Concord, Buchanan Field, CA24 mi56 minSSW 910.00 miMostly Cloudy58°F48°F70%1017.4 hPa

Wind History from SFO (wind in knots)
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
8
AM
Last 24hrS9S9S13SW11S13S11SW13SW18SW17SW14W13W12W11W8W8SW6SW6SW6SW6SW7S43SW5SW6
1 day agoS14
G20
S19
G24
S20
G25
S18
G26
S22
G30
S13
G23
S18
G23
S18
G27
S14
G27
S21
G28
S17
G26
S15
G23
S16SW12SW12S12S10S11S7S8CalmS5SW9S11
2 days agoCalmCalmNE6NE7E6NE7NE6S9S14SW11S13S8SW7S13S11S10S8S11S14
G21
SW8S12S8S6S10
G18

Tide / Current Tables for San Francisco, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
San Francisco
Click for Map
Sat -- 12:39 AM PDT     6.68 feet High Tide
Sat -- 05:51 AM PDT     Sunrise
Sat -- 07:22 AM PDT     -1.78 feet Low Tide
Sat -- 07:55 AM PDT     Moonrise
Sat -- 02:37 PM PDT     5.03 feet High Tide
Sat -- 07:20 PM PDT     2.21 feet Low Tide
Sat -- 08:23 PM PDT     Sunset
Sat -- 10:36 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.56.664.52.50.5-1-1.7-1.6-0.90.31.634.24.954.53.62.72.22.32.93.94.9

Tide / Current Tables for Alcatraz Island S, San Francisco Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Alcatraz Island S
Click for Map
Sat -- 02:02 AM PDT     -0.01 knots Slack
Sat -- 05:20 AM PDT     -3.62 knots Max Ebb
Sat -- 05:51 AM PDT     Sunrise
Sat -- 07:55 AM PDT     Moonrise
Sat -- 09:10 AM PDT     0.01 knots Slack
Sat -- 12:27 PM PDT     2.36 knots Max Flood
Sat -- 03:46 PM PDT     -0.01 knots Slack
Sat -- 05:58 PM PDT     -1.80 knots Max Ebb
Sat -- 08:22 PM PDT     Sunset
Sat -- 09:07 PM PDT     0.00 knots Slack
Sat -- 10:36 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.610-1.4-2.8-3.6-3.4-2.7-1.6-0.20.91.82.32.31.80.9-0.3-1.4-1.8-1.5-0.9-0.10.61.3

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 (11,2,3,4)
      (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.