Tuesday, September17, 2019 L-36.com


Marine Weather and Tides
South San Francisco, CA

Version 3.4
NOTICE
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 6:51AMSunset 7:17PM Monday September 16, 2019 9:11 PM PDT (04:11 UTC) Moonrise 7:55PMMoonset 8:02AM Illumination 91% 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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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 856 Pm Pdt Mon Sep 16 2019
.small craft advisory in effect until 9 pm pdt this evening...
Tonight..W winds 10 to 20 kt.
Tue..SW winds 5 to 15 kt.
Tue night..W winds 5 to 15 kt.
Wed..SW winds 5 to 15 kt with gusts up to 25 kt.
Wed night..W winds 5 to 15 kt.
Thu..W winds 5 to 15 kt.
Thu night..W winds up to 10 kt.
Fri..W winds 5 to 15 kt.
Sat..W winds 5 to 15 kt.
PZZ500 856 Pm Pdt Mon Sep 16 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light winds will continue over the coastal waters through the middle of the week except locally breezy afternoon and evening winds along the coast south of pigeon point and over the bays. A warm front will bring a slight chance of rain mainly across the northern waters Tuesday night and Wednesday morning. A cold front will follow and move southward Wednesday afternoon. Northwesterly winds will increase at the end of the week. Mixed seas will persist with a moderate period northwest swell and a light southerly swell.


7 Day Forecast for Marine Location Near South San Francisco, CA
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location: 37.65, -122.36     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 170216
afdmtr
area forecast discussion
national weather service san francisco bay area
716 pm pdt Mon sep 16 2019

Synopsis The cold front that brought light rain to the region
earlier this morning has since pushed to our east, and will allow
for seasonably cool temperatures this afternoon and Tuesday. The
next weather system may bring scattered showers to the north bay
on Wednesday, and will also keep temperatures on the cool side of
normal through Thursday. Locally breezy conditions are also
possible for the higher elevations overnight Wednesday and
Thursday morning. Warmer weather is forecast on Friday and
Saturday, with slight cooling then expected for Sunday.

Discussion As of 1:52 pm pdt Monday... The san francisco bay
area and parts of the central california coast benefited from an
early season frontal system that brought light rain to the region
this morning. Rainfall totals in the urban areas ranged anywhere
from about 0.05" to 0.25" while the some of the highest amounts
exceeded a third of an inch in the east bay hills above oakland.

The cold front has since weakened as it continued to push eastward
into the central valley, leaving the bay area in a cool, post-
frontal environment with partly cloudy skies. High temperatures
this afternoon will top off in the 60s near the coast, warming to
the 70s to near 80 for interior locations. These values equate to
around 3 to 8 degrees below middle september normals.

Temperatures will remain fairly steady through the middle of the
week with a degree or two of fluctuation from day-to-day. Models
have been consistently advertising the arrival of another upper
level low that will drop south to northern california from the
pacific northwest on Wednesday. At this point, the best
precipitation chances will generally be north of our area, but
can't rule out some light rainfall in parts of sonoma or napa
counties. The higher elevations in the north and east bay could
see some locally breezy northerly winds as this system treks
eastward into nevada. The latest 12z ECMWF and even the NAM show
925 mb winds at 12z Thursday between about 10 to 25 kts. As this
low slowly pushes eastward into northern utah and southern idaho,
another round of locally breezy conditions will develop in the
higher elevations early Friday morning. The 925 mb winds are bit
stronger over the sacramento valley and the north bay by 12z
Friday, and include a bit more of an offshore component, according
the the latest ecmwf.

Temperatures will begin to increase region-wide during the day on
Friday as heights rise and ridging develops just off the west
coast. Interior locations will likely warm back to the middle 80s
to low 90s for both Friday and Saturday. Models keep the
progressive pattern in place by dropping another upper low from
the pacific northwest and into the great basin on Monday or
Tuesday next week with a broad ridge off the west coast.

Aviation As of 6:54 pm pdt Monday... Remnant surface heating is
still contributing to few-sct clouds at 2 to 7 thousand feet per
metar observations. However, soon the onset of night-time cooling
and steady drying in a fairly well mixed air mass without a marine
temperature inversion results inVFR forecast for the period.

From 06z to 14z Tuesday night over the north bay and east bay
weak low level wind shear (llws) is possible. Winds near 925 mb
pick up a bit, though the higher resolution WRF shows much less
wind at 850 mb. May add llws in the later TAF cycle.

Cloud layer(s) developing at 8,000 to 10,000 feet Tuesday evening
and night as a surface warm front approaches our coastal waters.

This could eventually bring a period of light rain into the north
bay very late Tuesday night or Wednesday morning.

Vicinity of ksfo...VFR, west wind near 15 knots diminishing to 10
knots or less by late evening. West wind resuming to near 15 knots
Tuesday afternoon and evening.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR, early evening west to northwest winds
diminishing and becoming light by mid evening. A patch or two of low
clouds are possible overnight, but pretty good chancesVFR will hold
for the overnight and Tuesday.

Marine As of 4:44 pm pdt Monday... Generally light winds will
continue over the coastal waters through the middle of the week.

Expect locally breezy afternoon and evening winds along the coast
south of pigeon point and over the bays. Northwesterly winds will
increase at the end of the week. A slight chance of showers will
exist on Tuesday night and Wednesday, mainly across the northern
waters. Mixed seas will persist with a moderate period northwest
swell and a light southerly swell.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 9 pm
sca... Mry bay until 9 pm
sca... Pt pinos to pt piedras blancas 0-10 nm until 3 am
public forecast: rowe
aviation: canepa
marine: st
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AAMC1 - 9414750 - Alameda, CA 9 mi59 min WNW 5.1 G 6 66°F 70°F1015.8 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 10 mi71 min W 8.9 G 13 65°F 1014.1 hPa (+0.0)
LNDC1 11 mi53 min WNW 2.9 G 8 66°F 1015.3 hPa
OBXC1 11 mi53 min 65°F 55°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 11 mi53 min NNW 5.1 G 8.9 64°F 1015.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 11 mi53 min NNW 4.1 G 6
PXSC1 11 mi53 min 66°F 53°F
FTPC1 - 9414290 - San Francisco, CA 12 mi59 min SW 5.1 G 8.9 62°F 60°F1015.6 hPa
RTYC1 - 9414523 - Redwood City, CA 13 mi53 min W 8 G 9.9 64°F 73°F1016.4 hPa
46237 - San Francisco Bar, CA (142) 17 mi41 min 58°F4 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 17 mi72 min S 4.1 65°F 1015 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 18 mi53 min NW 8 G 12 67°F 1015.5 hPa
RCMC1 - 9414863 - Richmond, CA 19 mi53 min 66°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 26 mi31 min Calm G 3.9 60°F 59°F1016.8 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 29 mi53 min W 7 G 13 66°F 1014.9 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi53 min WNW 19 G 23 67°F 70°F1014.8 hPa55°F
UPBC1 30 mi53 min WNW 22 G 27
PCOC1 - 9415144 - Port Chicago, CA 33 mi53 min W 17 G 25 66°F 71°F1014.9 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 37 mi53 min WNW 11 G 15 67°F 1014.4 hPa
PRYC1 - 9415020 - Point Reyes, CA 41 mi53 min 56°F1015.8 hPa
SFXC1 - San Francisco Bay Reserve, CA 42 mi86 min WNW 12 65°F 1014 hPa53°F

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA2 mi75 minW 410.00 miA Few Clouds64°F55°F73%1015 hPa
Oakland, Metro Oakland International Airport, CA8 mi78 minWNW 910.00 miA Few Clouds66°F54°F65%1015.1 hPa
San Carlos Airport, CA10 mi82 minWSW 610.00 miClear64°F55°F73%1015.9 hPa
Half Moon Bay Airport, CA12 mi31 minNNW 310.00 miFair57°F55°F94%1016.3 hPa
Hayward, Hayward Air Terminal, CA13 mi77 minW 510.00 miFair64°F54°F70%1016.2 hPa
Palo Alto Airport, CA17 mi24 minW 810.00 miClear63°F53°F73%1015.9 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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Tide / Current Tables for Point San Bruno, San Francisco Bay, California
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Point San Bruno
Click for Map
Tue -- 02:40 AM PDT     6.06 feet High Tide
Tue -- 06:52 AM PDT     Sunrise
Tue -- 08:54 AM PDT     1.61 feet Low Tide
Tue -- 10:00 AM PDT     Moonset
Tue -- 02:52 PM PDT     6.51 feet High Tide
Tue -- 07:14 PM PDT     Sunset
Tue -- 09:23 PM PDT     Moonrise
Tue -- 09:27 PM PDT     1.31 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.15.25.965.64.73.62.61.81.6234.25.46.26.56.25.34.12.91.91.41.42.1

Tide / Current Tables for Sierra Point 1.3 mi ENE, South San Francisco Bay, California Current
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Sierra Point 1.3 mi ENE
Click for Map
Tue -- 12:02 AM PDT     0.89 knots Max Flood
Tue -- 03:15 AM PDT     -0.01 knots Slack
Tue -- 06:16 AM PDT     -0.99 knots Max Ebb
Tue -- 06:52 AM PDT     Sunrise
Tue -- 09:07 AM PDT     0.00 knots Slack
Tue -- 10:00 AM PDT     Moonset
Tue -- 12:14 PM PDT     0.84 knots Max Flood
Tue -- 03:18 PM PDT     -0.01 knots Slack
Tue -- 06:35 PM PDT     -1.12 knots Max Ebb
Tue -- 07:14 PM PDT     Sunset
Tue -- 09:23 PM PDT     Moonrise
Tue -- 09:38 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.80.50.1-0.3-0.8-1-0.9-0.5-0.10.30.70.80.80.50.1-0.3-0.8-1.1-1.1-0.7-0.30.10.5

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 (0,6,7,8)
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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.