Wednesday, September19, 2018 L-36.com


Marine Weather and Tides
Daly City, CA

Version 3.4
What's New / NOTES
9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 6:54AMSunset 7:11PM Wednesday September 19, 2018 10:14 AM PDT (17:14 UTC) Moonrise 3:28PMMoonset 12:46AM Illumination 73% Phase: Waxing Gibbous; Moon at 10 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
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PZZ545 Point Reyes To Pigeon Point To 10 Nm- 834 Am Pdt Wed Sep 19 2018
.small craft advisory in effect through late tonight...
Today..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. W swell 3 to 5 ft at 10 seconds.
Tonight..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. W swell 3 to 4 ft at 12 seconds.
Thu..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 2 to 4 ft at 12 seconds.
Thu night..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 5 ft at 11 seconds.
Fri..W winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft at 10 seconds.
Sat..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 2 to 4 ft. Patchy fog.
Sun..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 5 ft. Patchy fog.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 2 to 4 ft with a dominant period of 15 second swell periods. Across the bar...combined seas 3 to 5 ft with a dominant period of 15 second swell periods. Maximum ebb current of 1.5 knots at 12:37 pm Wednesday and 1.5 knots at 12:49 am Thursday.
PZZ500 834 Am Pdt Wed Sep 19 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate to locally strong northerly winds will prevail over the coastal waters today as high pressure remains over the eastern pacific. Gusty winds will generate steep wind waves creating hazardous sea conditions, especially for smaller vessels. Winds will then diminish late this week as the high pressure weakens and the thermal trough shifts towards the coast.


7 Day Forecast for Marine Location Near Daly City, CA
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location: 37.77, -122.54     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 191616
afdmtr
area forecast discussion
national weather service san francisco bay area
916 am pdt Wed sep 19 2018

Synopsis A warming and drying trend will begin over the area
today and continue into Thursday as onshore flow weakens. Gusty
northerly winds in higher elevations will result in enhanced fire
weather concerns from tonight into Thursday morning, mainly in
the hills of eastern napa county. Temperatures moderate slightly
over the upcoming weekend but will remain near to slightly above
seasonal averages.

Discussion As of 9:16 am pdt Wednesday... The marine layer has
deepened overnight to around 2000 feet, and satellite imagery
shows coastal stratus has pushed well inland through the monterey
bay area filling the salinas valley, and also extending northward
into southern santa clara county. Stratus coverage is much more
patchy over the san francisco bays with oak being the only bay
area airport affected by low ceilings at this time. Surface
pressure gradients are still predominately onshore with 1.1 mb
from sfo to sac, but the northerly gradient from acv-sfo is much
tighter versus 24 hours ago with 5.3 mb compared to 1.9 mb
yesterday at this time. This tight northerly gradient will
produced gusty winds across the north bay mountains, where a fire
weather watch remains in effect through tonight for gusty winds
and poor rh recoveries. Gusty winds are also possible tonight over
the east bay hills as well as the santa cruz mountains.

The upper level trough currently over california will continue to
move to the east as high pressure aloft builds in from the eastern
pacific. This will produce a warming trend over the next few days,
peaking on Thursday when high temperatures are forecast to edge
into the 90s across the warmest inland areas, with 60s and 70s
along the coast.

Latest medium range model runs bring a weak trough across the
pacnw over the weekend with high pressure rebuilding over the
eastern pacific early next week. Thus, temperatures should remain
around normal or slightly above.

Aviation As of 04:28 am pdt Wednesday... For 12z tafs.

Satellite imagery showing patchy stratus around the san mateo
coast, part of the east bay, and over the monterey bay area.

Expecting clearing between 16z-18z.VFR conditions this afternoon
and evening. Most sites expected to remainVFR through the period
aside from possible stratus development tonight for the monterey
taf sites. Onshore winds this afternoon 10-15 kt.

Vicinity of ksfo...VFR, possibility that the terminal could be
occasionally affected this morning by periodic MVFR cigs. Onshore
winds this afternoon around 15 kt.

Sfo bridge approach... .Clouds may move into the approach from the
east bay through late this morning.

Monterey bay terminals... .Ifr CIGS to continue through around
18z-19z.VFR this afternoon and evening. Chance of low cigs
returning tonight, but confidence is low. Onshore winds this
afternoon 10-15 kt.

Marine As of 8:34 am pdt Wednesday... Moderate to locally
strong northerly winds will prevail over the coastal waters today
as high pressure remains over the eastern pacific. Gusty winds
will generate steep wind waves creating hazardous sea conditions,
especially for smaller vessels. Winds will then diminish late this
week as the high pressure weakens and the thermal trough shifts
towards the coast.

Mtr watches warnings advisories
Tday Sca... Pigeon pt to pt pinos 0-10 nm from 11 am
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Mry bay from 2 pm
public forecast: sims
aviation: as
marine: mm
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FTPC1 - 9414290 - San Francisco, CA 5 mi51 min NW 6 G 7 56°F 60°F1013.8 hPa
46237 - San Francisco Bar, CA (142) 5 mi45 min 57°F5 ft
PXOC1 - 9414311 - San Francisco (Pier 1), CA 8 mi45 min ESE 6 G 8 57°F 1012.5 hPa
PXSC1 8 mi45 min 59°F 54°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 10 mi46 min SSE 5.1 58°F 1014 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 11 mi45 min SSW 4.1 G 5.1 58°F 1013.6 hPa
OBXC1 11 mi45 min 57°F 54°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 11 mi45 min SSW 5.1 G 6
RCMC1 - 9414863 - Richmond, CA 13 mi45 min 64°F
AAMC1 - 9414750 - Alameda, CA 13 mi51 min S 2.9 G 5.1 58°F 66°F1013.8 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 13 mi45 min S 4.1 G 6 58°F 1013.9 hPa
LNDC1 14 mi45 min SW 2.9 G 5.1 58°F 1013.5 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 16 mi35 min N 5.8 G 9.7 54°F 53°F1014 hPa
RTYC1 - 9414523 - Redwood City, CA 25 mi45 min ENE 1.9 G 2.9 58°F 68°F1014 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 25 mi45 min WNW 7 G 8.9 60°F 1013.2 hPa
PRYC1 - 9415020 - Point Reyes, CA 28 mi51 min NW 13 G 17 52°F1013.1 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi45 min WNW 11 G 12 60°F 66°F1013.3 hPa56°F
PCOC1 - 9415144 - Port Chicago, CA 33 mi45 min W 12 G 14 60°F 66°F1013.1 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 39 mi45 min NW 8 G 12 64°F 1012.5 hPa
SFXC1 - San Francisco Bay Reserve, CA 40 mi90 min W 8 59°F 1012 hPa53°F

Wind History for San Francisco, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA14 mi19 minN 010.00 miA Few Clouds60°F51°F72%1013.4 hPa
Half Moon Bay Airport, CA18 mi20 minS 55.00 miA Few Clouds with Haze57°F50°F77%1014.2 hPa
Oakland, Metro Oakland International Airport, CA18 mi22 minN 08.00 miPartly Cloudy58°F54°F87%1014 hPa
San Carlos Airport, CA23 mi3.2 hrsN 010.00 miFair54°F48°F82%1012.9 hPa
Hayward, Hayward Air Terminal, CA24 mi21 minWNW 47.00 miA Few Clouds62°F53°F73%1014.5 hPa

Wind History from SFO (wind in knots)
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Last 24hrW66N5N7NW14W18W18W19W16W15W13W13W12W9W5W5CalmW6W5CalmCalmCalmS3Calm
1 day agoW8W11NW12W12W14W19W22
G29
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2 days agoNW8W10W14W18
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W19W17W16W16W12W12W9W5W9W86CalmW7NW4W9

Tide / Current Tables for Ocean Beach, outer coast, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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Tide / Current data from XTide NOT FOR NAVIGATION
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Weather Map and Satellite Images
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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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (13,3,4,5)
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Ground Weather Radar Station San Francisco Bay Area, CA
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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.