Wednesday, October16, 2019 L-36.com


Marine Weather and Tides
Daly City, CA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:17AMSunset 6:32PM Wednesday October 16, 2019 5:23 AM PDT (12:23 UTC) Moonrise 7:31PMMoonset 8:53AM Illumination 92% Phase: Waning Gibbous; Moon at 18 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 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 243 Am Pdt Wed Oct 16 2019
.small craft advisory in effect from late tonight through late Thursday night...
Today..NW winds 5 to 15 kt. Wind waves around 4 ft. W swell around 3 ft at 19 seconds and nw 2 to 3 ft at 11 seconds.
Tonight..W winds 5 to 15 kt. Wind waves 2 to 3 ft. W swell 4 to 6 ft at 18 seconds and W 2 to 4 ft at 11 seconds. A chance of showers.
Thu..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 5 to 6 ft. W swell 7 to 9 ft at 15 seconds and nw around 2 ft at 11 seconds.
Thu night..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves around 6 ft. W swell 10 to 12 ft at 16 seconds and sw around 2 ft at 15 seconds.
Fri..NW winds 10 to 15 kt. Wind waves 4 to 5 ft. W swell 10 to 12 ft at 16 seconds and sw around 2 ft at 14 seconds.
Fri night..NW winds 5 to 15 kt. Wind waves 3 to 4 ft. W swell 9 to 11 ft at 15 seconds.
Sat..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 7 to 9 ft.
Sun..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 5 to 6 ft. NW swell 5 to 7 ft and sw around 2 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 3 to 5 ft with a dominant period of 17 seconds. Across the bar...seas 4 to 6 ft with a dominant period of 17 seconds. Maximum ebb current of 1.6 kt at 06:49 am Wednesday and 3.7 kt at 06:25 pm Wednesday.
PZZ500 243 Am Pdt Wed Oct 16 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light northwest winds will prevail over the coastal waters through Wednesday. A slight chance of light rain is possible to parts of the waters on Wednesday night associated with a passing front. After the frontal passage, winds will gradually increase. A large northwest swell is forecast to arrive on Thursday and build into Friday with forerunners arriving as early as today through early Thursday.


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 161140
afdmtr
area forecast discussion
national weather service san francisco bay area
440 am pdt Wed oct 16 2019

Synopsis Late rain will be possible across portions of the region
from tonight into early Thursday morning as a weak cold front sweep
through northern and central california. Cooler, breezy conditions
develop in wake of the frontal passage by Thursday afternoon and
will continue into Friday. A warming and drying trend is then
forecast late in the weekend and into early next week.

Discussion As of 03:00 am pdt Wednesday... Patchy fog (dense at
times) is being reported over the sonoma valley and northern
marin county, down along the san mateo coastline and into the
monterey bay region. This is less widespread compared to yesterday
morning, yet the marine layer remains around 1,200 feet in depth.

Look for a region-wide cooling trend today in advance of an
approaching frontal system. This early season system is brining
widespread rainfall to washington and oregon with rain lightly to
spread into far northwest california later in the day. Light rain
will develop as far south as the north bay late this evening and
then across the san francisco bay area overnight. While pwat
values of 1.50" are advecting inland ahead of this system, the
best mid upper level support will remain to our north. As the
weakening boundary pushes southward into the central coast
Thursday morning, light rain will be possible as far south as the
monterey peninsula during the pre-dawn hours while ending to the
north. Overall, rainfall amounts from this system will be less
than a tenth of an inch for most.

Temperatures will continue on the cooling trend Thursday as a colder
air mass advects southward across the region in wake of the frontal
passage. Brisk northwest winds will also develop and become locally
gusty in the afternoon and evening hours, especially along the coast
and in the hills. The strongest winds are likely to gust to 35 to 40
mph. The cool, breezy conditions will persist into Friday as well,
yet winds will weaken slightly. Another fast-moving system will move
across the pacific northwest and northern california from Friday
night into Saturday morning. This will bring another slight chance
of precipitation to the north bay, yet again rainfall amounts will
be light.

A warming trend is then forecast to begin on Sunday and become more
robust early next week as high pressure builds over the region.

Thus, look for widespread 70s closer to the coast and 80s across the
interior early in the week. Periods of dry, offshore flow will also
be possible across portions of the north bay next week as well.

However, offshore winds are not forecast to be strong and or
widespread. The ensembles indicate above average temperatures are
likely to extend into the latter half of next week as well with high
pressure remaining the dominate weather feature across the region.

Aviation As of 4:40 am pdt Tuesday... High clouds are moving
over central california from the southwest, creating a challenge
for detecting stratus from satellite. Surface observations show a
wide range fromVFR conditions to vlifr conditions. Stratus
coverage remains hugged close to the coastline and with patches
around the sf bay. WidespreadVFR conditions will return by mid-
to-late morning and into the afternoon. A cold front moving in
from the northwest will provide a slight chance for precipitation
for northern terminals toward the end of the TAF period with light
winds.

Vicinity of ksfo... Less stratus than 24 hours ago, though high
clouds are obscuring satellite detection. Winds are onshore and
remaining through the TAF period. Stratus is expected to expand
in coverage around the bay through sunrise, but there remains
uncertainty if it will bring impacts to the terminal.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Lifr vlifr CIGS and vis impacting both
mry and sns with patchy fog.VFR condition return by mid-to-late
morning.

Marine As of 04:27 am pdt Wednesday... Light northwest winds
will prevail over the coastal waters through Wednesday. A slight
chance of light rain is possible to parts of the waters on
Wednesday night associated with a passing front. After the
frontal passage, winds will gradually increase. A large northwest
swell is forecast to arrive on Thursday and build into Friday
with forerunners arriving as early as today through early
Thursday.

Mtr watches warnings advisories
Tday Sca... Pt pinos to pt piedras blancas 0-10 nm from 9 am
public forecast: rgass
aviation: dk rowe
marine: dk rowe
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46237 - San Francisco Bar, CA (142) 5 mi53 min 56°F2 ft
FTPC1 - 9414290 - San Francisco, CA 5 mi59 min NW 2.9 G 4.1 53°F 57°F1016.6 hPa
PXSC1 8 mi53 min 55°F 55°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 8 mi53 min W 4.1 G 5.1 54°F 1015.3 hPa
OBXC1 11 mi53 min 55°F 54°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 11 mi53 min WNW 5.1 G 8 54°F 1016.3 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 11 mi53 min W 5.1 G 6
AAMC1 - 9414750 - Alameda, CA 13 mi59 min NNW 1.9 G 4.1 54°F 62°F1016.7 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 13 mi53 min S 5.1 G 6 55°F 1016.5 hPa
RCMC1 - 9414863 - Richmond, CA 13 mi53 min 60°F
LNDC1 14 mi53 min Calm G 1 55°F 1016.2 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 16 mi43 min 3 ft
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 25 mi53 min NW 4.1 G 6 54°F 1015.9 hPa
RTYC1 - 9414523 - Redwood City, CA 25 mi53 min SSE 1.9 G 1.9 52°F 66°F1016.9 hPa
PRYC1 - 9415020 - Point Reyes, CA 28 mi53 min 57°F1016.4 hPa
UPBC1 29 mi53 min WNW 11 G 14
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi53 min WNW 8.9 G 11 54°F 63°F1016 hPa54°F
PCOC1 - 9415144 - Port Chicago, CA 33 mi53 min WSW 11 G 14 56°F 64°F1015.9 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 39 mi53 min NW 13 G 17 57°F 1014.8 hPa
SFXC1 - San Francisco Bay Reserve, CA 40 mi98 min W 1.9 52°F 1016 hPa48°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 mi87 minW 710.00 miA Few Clouds54°F48°F80%1016.2 hPa
Oakland, Metro Oakland International Airport, CA18 mi30 minN 010.00 miPartly Cloudy50°F46°F86%1016.7 hPa
Half Moon Bay Airport, CA18 mi28 minN 08.00 miMostly Cloudy45°F41°F87%1016.9 hPa
Hayward, Hayward Air Terminal, CA24 mi29 minENE 310.00 miFair50°F45°F83%1017.2 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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Last 24hrW6W5SW4NW3CalmN5NW9NW10NE5E4NE4CalmW18W18W17W11W8W9W8W10W7W5W7W7
1 day agoW7SW3SW4CalmCalmNE5NE5NE4NW11W14W17W16W13W12W14W13W10W9W9NW4W6W11W10W8
2 days agoW5CalmW12W10NW4NE3NW13NW9NW10W15W16W17W14W9NW10NW7NW7W10W6W6CalmCalm3W6

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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South Channel
Click for Map
Wed -- 02:52 AM PDT     -0.00 knots Slack
Wed -- 05:13 AM PDT     -1.12 knots Max Ebb
Wed -- 07:19 AM PDT     Sunrise
Wed -- 08:06 AM PDT     0.00 knots Slack
Wed -- 09:53 AM PDT     Moonset
Wed -- 11:04 AM PDT     1.02 knots Max Flood
Wed -- 02:14 PM PDT     -0.00 knots Slack
Wed -- 05:27 PM PDT     -1.70 knots Max Ebb
Wed -- 06:31 PM PDT     Sunset
Wed -- 08:30 PM PDT     Moonrise
Wed -- 08:49 PM PDT     0.00 knots Slack
Wed -- 11:51 PM PDT     1.27 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.20.90.5-0.1-0.8-1.1-1-0.5-0.10.40.810.90.60.1-0.5-1.2-1.6-1.6-1.1-0.50.10.71.1

Weather Map
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wmap_P
GEOS 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 (8,2,3,4)
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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.