Thursday, November23, 2017 L-36.com


Marine Weather and Tides
Daly City, 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 6:58AMSunset 4:55PM Thursday November 23, 2017 7:59 PM PST (03:59 UTC) Moonrise 11:05AMMoonset 9:24PM Illumination 29% Phase: Waxing Crescent; Moon at 5 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- 251 Pm Pst Thu Nov 23 2017
Tonight..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 5 ft at 13 seconds.
Fri..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 6 ft at 12 seconds.
Fri night..N winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 3 to 5 ft at 11 seconds.
Sat..E winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 3 to 5 ft at 11 seconds.
Sat night..S winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 3 to 4 ft at 19 seconds. Slight chance of rain in the evening, then chance of rain after midnight.
Sun..SW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 7 to 9 ft. Chance of rain.
Mon..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 10 to 13 ft. Slight chance of rain.
Tue..N winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 6 to 8 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 5 to 7 ft Wednesday with a swell period of 12 seconds. Across the bar...combined seas 6 to 8 ft Wednesday with a swell period of 12 seconds. Maximum ebb current of 1.5 knots at 06:42 pm Thursday and 0.6 knots at 08:06 am Friday.
PZZ500 251 Pm Pst Thu Nov 23 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Coastal troughing along the southern california coast will continue to cause moderate to occasionally strong northernly winds over the southern coastal waters through the remainder of the week, and possibly into Saturday morning. Winds will increase and turn out of the south by late Saturday morning as a low pressure system moves into the pacific northwest waters. In response, northwest swell increases late Saturday night and continue to increase through the weekend. Rain will spread over the area Saturday night and Sunday.

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 232330
afdmtr
area forecast discussion
national weather service san francisco bay area
330 pm pst Thu nov 23 2017

Synopsis Light rain will end over the north bay by this
evening. Dry weather is expected on Friday and will continue
through most of Saturday. Rain will return to our region late
Saturday through Sunday.

Discussion As of 1:59 pm pst Thursday... Kmux radar still shows
a band of echoes stretching across the north bay counties and
into the central valley. Very little rainfall has reached the
ground from this, however, with only a few hundredths being
measured at a few automated rain gauges in the north bay. Current
temperatures are running cooler than yesterday at this time at
most locations with readings mainly in the 60s and 70s.

High pressure will rebuild over the state on Friday for dry and
mild conditions continuing through most of the weekend. Rain
chances will return to the district as a cold front impacts the
area. Rainfall is expected to begin in the north bay Saturday
evening, and then spread south across our entire area through
Sunday. Rain will briefly switch to showers behind the front late
Sunday with dry weather returning again early next week. Rainfall
amounts are forecast to range from generally 1 4" to 1 2" for
most urban locations, with coastal ranges seeing 1 2" to 1", and
possibly some areas getting up to 1 1 4". In addition to the
rain, gusty southerly winds will accompany the frontal passage
with gusts to 25 mph possible.

After this upper trough moves eastward on Monday, the rest of the
week is expected to be dry and mild as another ridge of high
pressure builds over the west.

Aviation As of 3:30 pm pst Friday... For 00z tafs. Mid and high
level clouds remain over the area along with scattered showers
around the north bay. Still expecting those showers to dissipate
by this evening. Winds have turned onshore at around 10 kt and
will decrease into tonight. CIGS are expected to lower this
evening and overnight across the region down to MVFR ifr.

Confidence in timing of development and clearing of MVFR ifr cigs
is low.

Low-moderate forecast confidence.

Vicinity of ksfo...VFR conditions expected to remain until tonight.

Nw wnw winds this afternoon, around 10 kt. Current thinking is
still MVFR CIGS rolling in around 08-09z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR this afternoon, with ifr cigs
possible around midnight; low confidence on cig timing. Light to
moderate NW winds this afternoon, 5-10 kt with higher winds
possible through early tonight at ksns.

Marine As of 02:51 pm pst Thursday... Coastal troughing along
the southern california coast will continue to cause moderate to
occasionally strong northernly winds over the southern coastal
waters through the remainder of the week, and possibly into
Saturday morning. Winds will increase and turn out of the south by
late Saturday morning as a low pressure system moves into the
pacific northwest waters. In response, northwest swell increases
late Saturday night and continue to increase through the weekend.

Rain will spread over the area Saturday night and Sunday.

Mtr watches warnings advisories
Tday Sca... Pt pinos to pt piedras blancas 0-10 nm
public forecast: sims
aviation: as
marine: bam
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FTPC1 - 9414290 - San Francisco, CA 5 mi48 min SSE 1.9 G 1.9 60°F 57°F1019.2 hPa
46237 - San Francisco Bar, CA (142) 5 mi60 min 57°F6 ft
PXSC1 8 mi42 min 61°F 60°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 10 mi58 min Calm 59°F 1019 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 11 mi48 min NNE 1 G 2.9
OBXC1 11 mi42 min 60°F 58°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 11 mi42 min 60°F 1019 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 13 mi42 min ESE 1 G 2.9 61°F 1019.2 hPa
RCMC1 - 9414863 - Richmond, CA 13 mi48 min SSE 4.1 G 5.1 60°F 58°F1018.7 hPa
AAMC1 - 9414750 - Alameda, CA 13 mi42 min Calm G 1 62°F 60°F1019.5 hPa
LNDC1 14 mi48 min Calm G 1.9 62°F 1018.9 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 16 mi70 min NNW 7.8 G 7.8 58°F 58°F6 ft1018.9 hPa (+0.0)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 25 mi42 min WSW 4.1 G 5.1 61°F 1018.4 hPa
RTYC1 - 9414523 - Redwood City, CA 25 mi42 min NNW 1.9 G 2.9 61°F 61°F1019.4 hPa
PRYC1 - 9415020 - Point Reyes, CA 28 mi42 min WNW 14 G 18 58°F1018.9 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi42 min SSW 1 G 1.9 61°F 59°F1018.7 hPa61°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 33 mi70 min NNW 5.8 G 7.8 58°F 59°F8 ft1018.8 hPa (+0.6)
PCOC1 - 9415144 - Port Chicago, CA 33 mi42 min SW 6 G 6 63°F 59°F1018.3 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 39 mi42 min WNW 4.1 G 7 65°F 1017.9 hPa
SFXC1 - San Francisco Bay Reserve, CA 40 mi75 min SW 1.9 61°F 1018 hPa58°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 mi2.1 hrsWNW 910.00 miOvercast62°F55°F80%1018.8 hPa
Half Moon Bay Airport, CA18 mi65 minNNW 88.00 miPartly Cloudy59°F57°F94%1017.9 hPa
Oakland, Metro Oakland International Airport, CA18 mi67 minWNW 310.00 miMostly Cloudy61°F57°F90%1018.8 hPa
San Carlos Airport, CA23 mi73 minN 010.00 miMostly Cloudy63°F59°F88%1019 hPa
Hayward, Hayward Air Terminal, CA24 mi66 minWSW 310.00 miFair63°F54°F73%1019.6 hPa

Wind History from SFO (wind in knots)
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Last 24hrE4CalmCalmCalmCalmCalmNE3CalmCalmN6CalmCalmE3S3E3E3CalmE3CalmCalmNW7NW6W9W4
1 day agoCalmCalmS3SE3SE6E3SE3SE3S4S5S3CalmCalmSE5E5E5E3N6N3CalmNE4N5NW6SE5
2 days agoW3NE3N4N5N4S6CalmE7E6SE6E6E6E7E5E5E5E5E4N7N7N5N4N5Calm

Tide / Current Tables for Ocean Beach, outer coast, California
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Ocean Beach
Click for Map
Thu -- 02:39 AM PST     4.61 feet High Tide
Thu -- 06:59 AM PST     Sunrise
Thu -- 07:34 AM PST     3.29 feet Low Tide
Thu -- 11:04 AM PST     Moonrise
Thu -- 12:56 PM PST     5.14 feet High Tide
Thu -- 04:53 PM PST     Sunset
Thu -- 08:02 PM PST     0.13 feet Low Tide
Thu -- 09:24 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.44.14.54.64.443.63.33.33.644.555.14.94.33.32.11.10.40.10.411.8

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
Click for Map
Thu -- 12:03 AM PST     1.18 knots Max Flood
Thu -- 04:01 AM PST     -0.01 knots Slack
Thu -- 06:00 AM PST     -0.74 knots Max Ebb
Thu -- 06:59 AM PST     Sunrise
Thu -- 09:04 AM PST     0.00 knots Slack
Thu -- 11:04 AM PST     Moonrise
Thu -- 11:45 AM PST     0.64 knots Max Flood
Thu -- 02:41 PM PST     -0.00 knots Slack
Thu -- 04:53 PM PST     Sunset
Thu -- 06:07 PM PST     -1.50 knots Max Ebb
Thu -- 09:24 PM PST     Moonset
Thu -- 09:44 PM PST     0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.21.10.90.50-0.5-0.7-0.6-0.3-00.30.60.60.50.2-0.1-0.7-1.2-1.5-1.3-0.9-0.40.10.7

Weather Map and Satellite Images
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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)
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Ground Weather Radar Station San Francisco Bay Area, CA
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weather_mapweather_map weather_map

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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.