Friday, January18, 2019 L-36.com


Marine Weather and Tides
Redwood City, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:19AMSunset 5:19PM Friday January 18, 2019 1:53 PM PST (21:53 UTC) Moonrise 2:57PMMoonset 4:44AM Illumination 95% Phase: Waxing Gibbous; Moon at 13 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- 848 Am Pst Fri Jan 18 2019
Today..SE winds up to 10 kt...becoming sw this afternoon. A slight chance of showers this morning, then a chance of showers this afternoon.
Tonight..S winds 5 to 15 kt. A chance of showers.
Sat..SE winds up to 10 kt. A chance of showers.
Sat night..SW winds up to 10 kt. A chance of rain.
Sun..SW winds 5 to 15 kt. Rain likely.
Sun night..W winds 10 to 15 kt with gusts up to 25 kt.
Martin luther king jr day..NW winds 5 to 10 kt.
Tue..N winds around 5 kt.
PZZ500 848 Am Pst Fri Jan 18 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... SWells will continue gradually diminish through the day, but still remain hazardous through this evening. Of greatest concern will be near the immediate coastline, harbor entrances and the san francisco bar. Conditions will improve tonight and into the weekend as the swells continue to diminish.


7 Day Forecast for Marine Location Near Redwood City, CA
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location: 37.52, -122.2     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 181759
afdmtr
area forecast discussion
national weather service san francisco bay area
959 am pst Fri jan 18 2019

Synopsis Shower chances will continue across the north bay on
Friday and Saturday as the storm track shifts north. A weak
boundary will move into the sf bay on Saturday morning, bringing
a chance of showers to most of the bay area. Dry conditions are
anticipated elsewhere through Saturday. More widespread light
rain is forecast for Sunday as a pacific storm system moves
through the area. Dry and mild weather is expected to develop on
Monday and continue through the remainder of next week.

Discussion As of 9:26 am pst Friday... Kmux radar indicated
some weak echos associated with light rain showers earlier this
morning across the north bay. The showers were sufficient enough
to register some measurable rainfall, including both the napa and
santa rosa airports where 0.01" and 0.02" were recorded,
respectively. The latest run of hrrr suggests light rain showers
to continue off on in the north bay, primarily focused during the
the afternoon and evening hours. Most locations south of the
golden gate can generally expect dry conditions for the day on
Friday before light rain chances nudge upward after sunset and for
the overnight hours. High temperatures are forecast to rise to
middle 50s to middle 60s across the region this afternoon, with
the warmest locations in the salinas valley. The short-term
forecast remains on track and do not anticipate making any major
updates to the grids at the present. For additional details beyond
day 1, please refer to the previous discussion section.

Prev discussion As of 03:20 am pst Friday... Kmux radar indicates a
few light showers over the coastal waters, which appear to be
dissipating before they move inland. These showers are not being
resolved by models but expect any showers which manage to reach
land to be light. Extensive cloud cover has kept temperatures
fairly mild with current temperatures in the mid 40s in the north
bay valleys to the mid 50s near the sf bay shoreline. Cloud cover
is preventing fog from forming apart from isolated locations.

An upper level ridge forming just offshore will build along the
california coast on Friday. This will shift the storm track to the
north with heavy rainfall expected in oregon and far northern
california Friday through Saturday. Moisture will move far enough
south to bring scattered light showers to the north bay for much
of Friday. A weak boundary is then forecast to move southeast into
the greater bay area Saturday morning before dissipating. This
will bring a chance of light rain as far south as san jose. Light
showers will continue across the north bay through Saturday. Up to
a half inch of rain is anticipated through Saturday night in
portions of the north bay, tapering to only a few hundredths
around the golden gate. High temperatures Friday and Saturday
will be slightly above normal in our southern regions with low to
mid 60s expected. Thicker cloud cover and light precipitation will
keep the north bay cooler with highs in the upper 50s to near 60.

An upper level trough will push the ridge east and bring a chance
of rain to the entire area on Sunday. A cold front will push
through the area Sunday morning into Sunday afternoon, with
precipitation along the front. The front is expected to weaken as
it passes through the area, and moisture appears limited with pwat
remaining under an inch. Showers will continue behind the front
as the cold core of the upper low moves overhead. Rainfall totals
with this system will be light, with an additional half inch
possible in the north bay with less than a quarter inch elsewhere.

Behind the cold front, northwest winds could become breezy near
the coast and in the higher terrain as surface high pressure
builds to the west and the surface low deepens over the great
basin.

The pattern will transition to much drier beginning on Monday. High
pressure will strengthen over the east pacific and gradually shift
east. By Thursday, the ridge will become highly amplified with
the storm track shunted north into alaska and the ridge axis
along the coast. Models are in excellent agreement about the
ridge remaining anchored in place through at least the end of
next week. This will result in no chance of precipitation during
the extended. Dry weather and mostly clear skies will create seasonably
cool nights, while high temperatures will be above normal.

Aviation As of 9:53 am pst Friday... For 18z tafs. Showers have
ended, but mid-high CIGS remain. A few weak disturbances will pass
through norcal bringing a chance for some showers, but most likely
for the north bay and oak sfo. Winds will be generally light.

Vicinity of ksfo... Light winds and mid level CIGS through this
evening. A few showers may impact the terminals overnight.

Sfo bridge approach... Similar to sfo.

Monterey bay terminals...VFR conditions expected through the
period. Light winds.

Beaches As of 9:57 am pst Friday... Buoys continue to show
moderate-large swell with a moderate period. Breaking waves of 20
to 30 feet are possible today. A high surf warning remains in
effect until 5 pm today. These large breaking waves will lead to
increased wave run- up on beaches with waves topping and washing
over large rocks and jetties. These conditions may also produce
localized coastal flooding of vulnerable locations, especially
early this morning during high tide. Use extreme caution near the
surf zone as these large waves will be capable of sweeping people
into the frigid and turbulent ocean water. Cold water shock may
cause cardiac arrest, and it also can cause an involuntary gasp
reflex causing drowning, even for a good swimmer. The surf zone
will be very dangerous due to strong currents and powerful
breaking waves.

Marine As of 09:51 am pst Friday... Swells will continue
gradually diminish through the day, but still remain hazardous
through this evening. Of greatest concern will be near the
immediate coastline, harbor entrances and the san francisco bar.

Conditions will improve tonight and into the weekend as the
swells continue to diminish.

Mtr watches warnings advisories
Tday High surf warning... Caz006-505-509-529-530
sca... Mry bay
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Rough bar advisory for sf bar
public forecast: rowe st
aviation: mm
marine: mm
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 1 mi36 min E 4.1 G 6 60°F 54°F1026.4 hPa
AAMC1 - 9414750 - Alameda, CA 18 mi42 min S 1.9 G 2.9 55°F 53°F1026.3 hPa
LNDC1 19 mi36 min S 4.1 G 5.1 58°F 1025.9 hPa
OBXC1 21 mi36 min 55°F 53°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 21 mi36 min SSW 5.1 G 6 56°F 1026 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 21 mi36 min SSW 4.1 G 5.1
PXOC1 - 9414311 - San Francisco (Pier 1), CA 22 mi36 min SE 5.1 G 7 58°F 1025 hPa
PXSC1 22 mi42 min 59°F 49°F
FTPC1 - 9414290 - San Francisco, CA 24 mi42 min SE 4.1 G 7 59°F 55°F1026.2 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 28 mi36 min SSW 2.9 G 4.1 57°F 1026.3 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 29 mi43 min N 1.9 55°F 1026 hPa
RCMC1 - 9414863 - Richmond, CA 30 mi36 min 54°F
MZXC1 - 9415102 - Martinez-Amorco CA 36 mi36 min NNE 5.1 G 6
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 37 mi36 min E 9.9 G 11 57°F 1025.6 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 38 mi34 min SE 5.8 G 12 57°F 56°F1026.4 hPa
PCOC1 - 9415144 - Port Chicago, CA 38 mi36 min N 2.9 G 4.1 57°F 51°F1026.1 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 40 mi36 min ENE 8.9 G 9.9 57°F 1025.8 hPa
SFXC1 - San Francisco Bay Reserve, CA 48 mi69 min ENE 1.9 60°F 1027 hPa50°F

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Carlos Airport, CA3 mi67 minENE 59.00 miMostly Cloudy57°F50°F77%1026.4 hPa
Palo Alto Airport, CA5 mi67 minNNE 610.00 miMostly Cloudy61°F51°F72%1026.7 hPa
Mountain View, Moffett Field, CA10 mi58 minNNE 510.00 miMostly Cloudy62°F48°F60%1026.7 hPa
Hayward, Hayward Air Terminal, CA11 mi60 minS 310.00 miMostly Cloudy62°F48°F62%1027.1 hPa
San Francisco, San Francisco International Airport, CA11 mi58 minENE 510.00 miOvercast60°F50°F70%1025.8 hPa
Oakland, Metro Oakland International Airport, CA12 mi61 minS 610.00 miOvercast58°F50°F75%1026.4 hPa
Half Moon Bay Airport, CA16 mi59 minSW 53.00 miOvercast with Haze57°F50°F77%1026.4 hPa
San Jose, San Jose International Airport, CA18 mi61 minN 010.00 miOvercast62°F43°F50%1026.1 hPa
Livermore, Livermore Municipal Airport, CA24 mi61 minVar 310.00 miOvercast61°F48°F63%1026 hPa

Wind History from SQL (wind in knots)
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Last 24hrSW63SW7SW8SW5W6SW9CalmCalmSW3CalmCalmCalmW3S3S3CalmCalmCalmCalmCalm35E5
1 day agoSE10
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2 days agoE7E5SE12SE14
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SE10S8S5S6S7S5SE6S8S7SE10------S6SE14
G22

Tide / Current Tables for Redwood Creek entrance (inside), San Francisco Bay, California
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Redwood Creek entrance (inside)
Click for Map
Fri -- 03:49 AM PST     2.89 feet Low Tide
Fri -- 04:43 AM PST     Moonset
Fri -- 07:21 AM PST     Sunrise
Fri -- 09:35 AM PST     8.71 feet High Tide
Fri -- 02:57 PM PST     Moonrise
Fri -- 05:06 PM PST     -0.67 feet Low Tide
Fri -- 05:17 PM PST     Sunset
Fri -- 11:51 PM PST     6.83 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.15.243.12.93.44.66.17.68.58.686.74.82.71-0.2-0.7-0.30.82.33.95.56.5

Tide / Current Tables for Dumbarton Bridge, San Francisco Bay, California Current
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Dumbarton Bridge
Click for Map
Fri -- 01:39 AM PST     -0.61 knots Max Ebb
Fri -- 04:05 AM PST     0.00 knots Slack
Fri -- 04:43 AM PST     Moonset
Fri -- 07:20 AM PST     Sunrise
Fri -- 07:31 AM PST     1.46 knots Max Flood
Fri -- 10:47 AM PST     -0.00 knots Slack
Fri -- 01:55 PM PST     -1.81 knots Max Ebb
Fri -- 02:57 PM PST     Moonrise
Fri -- 05:17 PM PST     Sunset
Fri -- 05:30 PM PST     0.00 knots Slack
Fri -- 08:43 PM PST     1.87 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.1-0.5-0.6-0.4-00.511.41.41.10.5-0.2-1-1.6-1.8-1.6-1.1-0.40.41.31.81.91.61.2

Weather Map and Satellite Images
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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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Wind Forecast for San Francisco/Monterey Bay Area, CA (16,3,4,5)
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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.