Tuesday, February20, 2018 L-36.com


Marine Weather and Tides
Redwood 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 6:49AMSunset 5:55PM Tuesday February 20, 2018 7:35 AM PST (15:35 UTC) Moonrise 9:43AMMoonset 10:54PM Illumination 28% 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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PZZ530 San Pablo Bay Suisun Bay The West Delta And San Francisco Bay North Of The Bay Bridge- 224 Am Pst Tue Feb 20 2018
.small craft advisory in effect until 3 am pst early this morning...
Today..N winds 10 kt...becoming S in the afternoon.
Tonight..W winds 5 to 15 kt. Slight chance of showers after midnight.
Wed..NE winds 5 to 15 kt. Chance of showers in the morning.
Wed night..W winds 5 to 15 kt.
Thu..NW winds 15 to 25 kt.
Fri..NW winds 5 to 15 kt.
Sat..SE winds 10 kt...becoming w.
PZZ500 224 Am Pst Tue Feb 20 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will decrease by this afternoon as low pressure moves eastward. Another system will move across the waters on Thursday with northwesterly winds expected to increase once again starting Wednesday night.

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 201129
afdmtr
area forecast discussion
national weather service san francisco bay area
329 am pst Tue feb 20 2018

Synopsis A cold air mass over the region this morning will
result in freezing temperatures for most inland areas with frost
potentially impacting many coastal locations. A series of weak
weather systems will then impact the region through late week and
potentially into early next week bringing cool, unsettled weather
conditions.

Discussion As of 03:00 am pst Tuesday... Chilly conditions
being observed over the region this morning with most locations in
the 30s to upper 20s. Meanwhile, lower 40s are being reported in
san francisco and around the bay. While widespread freezing
temperatures are still likely across inland areas through the
remainder of the morning, temperatures may not be as cold as
previously forecast for portions of the region as winds have been
a bit slower to subside. With all this said, widespread frost is
likely inland with areas of frost potentially impacting some
coastal areas. A freeze warning remains in effect for inland areas
with a frost advisory in effect for coastal areas (except for the
city of san francisco) through 9 am pst.

Mostly sunny conditions are expected over the region today with
daytime temperatures warming into the 50s in most urban areas. These
conditions should feel a bit more comfortable than those on Monday
given weaker winds. Another mid upper level system is then forecast
to approach the region from the north late tonight into Wednesday
morning. Look for an increase in cloud cover and potential for
showers out over the coast initially. The latest forecast models are
not trending further inland with the potential for light
precipitation, especially along the coast and in the
hills mountains. This system will to be a cold one with lowering
snow levels once again during the next 24-36 hours. However,
widespread precipitation is not likely with most locations remaining
dry as this system quickly passes across the region.

Additional weak systems are forecast to drop southward along the
back side of the broad mid upper level trough positioned over the
western portion of the country through late week. This will maintain
chances for isolated to at times scattered showers Thursday into
Friday morning. In addition, snow showers cannot be ruled out in the
highest elevations over the region through late week as well.

Despite this unsettled pattern, widespread measurable rainfall is
not expected across the region at this time. This pattern will also
support reinforcing shots of colder air masses which will keep
temperatures below seasonal averages and potential for freezing
conditions for inland areas on nights when sky conditions clear out
and winds subside.

Conditions are then forecast to warm slightly for at least the start
of the upcoming weekend in response to a weak short-wave ridge that
develops over the region. This pattern will likely be short lived as
the models generally point towards additional systems dropping
southward down the west coast early next week. The models do differ
on timing, strength and available moisture which each system late in
the period. Thus, confidence in the details remains low at this
time. Overall, look for cool and unsettled conditions heading into
the end of the month.

Aviation As of 3:30 am pst Tuesday... Winds will continue to
decrease into the morning.VFR conditions through the period with
cigs beginning to move in tonight.

Vicinity of ksfo...VFR.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR.

Climate
Here are record low temperatures and the years they occurred for
Tuesday and Wednesday.

Location Tuesday Wednesday
sf bay area
healdsburg 22 in 1922 28 in 1929
santa rosa 26 in 1913 26 in 1913
calistoga 25 in 2006 25 in 2006
kentfield 27 in 1913 29 in 1953
san rafael 32 in 2006 33 in 1955
napa 28 in 1920 29 in 1955
san francisco 38 in 1897 36 in 1890
sfo airport 37 in 2011 34 in 1955
half moon bay 32 in 2013 31 in 2006
oakland airport 34 in 2006 33 in 1955
richmond 35 in 1990 35 in 1981
livermore 28 in 1942 27 in 1955
moffett field 34 in 2006 32 in 1955
san jose 30 in 1897 25 in 1897
gilroy 30 in 1990 31 in 1976
monterey bay area
santa cruz 29 in 1913 30 in 1955
salinas 31 in 2006 31 in 1970
salinas airport 28 in 1953 30 in 1953
monterey 35 in 2006 36 in 1952
king city 22 in 1953 23 in 1953

Marine As of 02:24 am pst Tuesday... Winds will decrease by
this afternoon as low pressure moves eastward. Another system will
move across the waters on Thursday with northwesterly winds
expected to increase once again starting Wednesday night.

Mtr watches warnings advisories
Tday Frost advisory... Caz505-508-509-529-530
freeze warning... Caz506-507-510>513-516>518-528
sca... Pigeon pt to pt pinos 0-10 nm until 6 am
sca... Pt pinos to pt piedras blancas 0-10 nm until 6 am
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm until 3 pm
public forecast: rgass
aviation: as
marine: as
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 1 mi47 min SSE 2.9 G 2.9 37°F 54°F1024 hPa
AAMC1 - 9414750 - Alameda, CA 18 mi53 min NNE 1.9 G 5.1 40°F 54°F1023.5 hPa
LNDC1 19 mi47 min NNE 5.1 G 6 40°F 1023.5 hPa
OBXC1 21 mi47 min 41°F 31°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 21 mi47 min NNE 8 G 11
OKXC1 - 9414776 - Oakland (Berth 34), CA 21 mi47 min NNE 9.9 G 11 41°F 1023.6 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 22 mi47 min N 7 G 8.9 42°F 1022.5 hPa
PXSC1 22 mi47 min 43°F 32°F
FTPC1 - 9414290 - San Francisco, CA 24 mi53 min SE 5.1 G 7 42°F 52°F1023.7 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 28 mi47 min NNE 8.9 G 9.9 40°F 1023.7 hPa
46237 - San Francisco Bar, CA (142) 29 mi65 min 50°F5 ft
RCMC1 - 9414863 - Richmond, CA 30 mi53 min N 7 G 8.9 41°F 53°F1023.2 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 36 mi47 min SE 4.1 G 4.1 37°F 53°F1023.7 hPa36°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 37 mi47 min SW 4.1 G 5.1 38°F 1023.5 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 38 mi45 min NNW 14 G 16 44°F 50°F7 ft1023.4 hPa (+1.2)
PCOC1 - 9415144 - Port Chicago, CA 38 mi47 min S 7 G 8.9 34°F 52°F1023.5 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 38 mi45 min NNW 19 G 21 47°F 53°F10 ft1023 hPa (+1.3)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 40 mi47 min W 1.9 G 5.1 39°F 1023.4 hPa
SFXC1 - San Francisco Bay Reserve, CA 48 mi110 min S 1.9 29°F 1023 hPa24°F

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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W11
G15
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G13
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G16
NW12
G15
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G23
W14
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G13
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SE2
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W8
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W10
G15
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G16
W14
G22
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G23
W20
G26
W20
G25
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NW23
G29
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G25
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G27
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NW12
G19
W15
G22
W13
G20
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G17
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W2
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N5
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NW3
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W13
G17
W5
G9
W18
W5
G8
W8
G12

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Carlos Airport, CA3 mi40 minN 010.00 miFair36°F28°F75%1023.7 hPa
Palo Alto Airport, CA5 mi48 minN 010.00 miClear0°F0°F%1023.7 hPa
Mountain View, Moffett Field, CA10 mi39 minN 010.00 miFair36°F28°F76%1024.3 hPa
San Francisco, San Francisco International Airport, CA11 mi39 minWSW 310.00 miFair39°F28°F65%1023.5 hPa
Hayward, Hayward Air Terminal, CA11 mi41 minENE 510.00 miFair35°F23°F61%1024.8 hPa
Oakland, Metro Oakland International Airport, CA12 mi42 minNE 410.00 miA Few Clouds32°F28°F85%1023.8 hPa
Half Moon Bay Airport, CA16 mi40 minNE 310.00 miFair30°F24°F80%1022.3 hPa
San Jose, San Jose International Airport, CA18 mi42 minSSE 310.00 miA Few Clouds35°F28°F76%1023.7 hPa
San Jose / Reid / Hillv, CA24 mi48 minN 010.00 miClear34°F28°F81%1023 hPa
Livermore, Livermore Municipal Airport, CA24 mi42 minE 410.00 miFair28°F24°F85%1023.7 hPa

Wind History from SQL (wind in knots)
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Last 24hrNW15
G21
NW10
G19
NW11
G19
N11
G14
N6N7NW7W9
G17
W13
G19
W19
G23
W15
G20
W11
G15
W8W7W5NW7NW5CalmNW4CalmCalmCalmCalmCalm
1 day agoW3NW14W14
G21
NW15
G23
W16
G19
W16
G25
W18
G26
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G24
W17
G27
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G26
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G22
NW15NW13W12
G15
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G21
W9
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W11
G14
W9NW8NW8W10
G17
W9
G14
2 days agoCalm3NW3----34N6NW7NW5N4N4NW7W3W3W3W5W5W9SW5W7W7W3W4

Tide / Current Tables for Redwood Creek entrance (inside), San Francisco Bay, California
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Redwood Creek entrance (inside)
Click for Map
Tue -- 03:33 AM PST     7.58 feet High Tide
Tue -- 06:51 AM PST     Sunrise
Tue -- 09:42 AM PST     Moonrise
Tue -- 09:57 AM PST     1.58 feet Low Tide
Tue -- 03:42 PM PST     6.70 feet High Tide
Tue -- 05:53 PM PST     Sunset
Tue -- 09:57 PM PST     1.41 feet Low Tide
Tue -- 10:54 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.65.26.67.47.56.95.64.12.81.91.62.13.14.45.76.56.76.25.23.92.61.71.41.9

Tide / Current Tables for Dumbarton Bridge, San Francisco Bay, California Current
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Dumbarton Bridge
Click for Map
Tue -- 01:09 AM PST     1.54 knots Max Flood
Tue -- 04:47 AM PST     -0.00 knots Slack
Tue -- 06:51 AM PST     Sunrise
Tue -- 07:21 AM PST     -1.10 knots Max Ebb
Tue -- 09:42 AM PST     Moonrise
Tue -- 10:18 AM PST     0.00 knots Slack
Tue -- 01:37 PM PST     1.35 knots Max Flood
Tue -- 05:13 PM PST     -0.00 knots Slack
Tue -- 05:53 PM PST     Sunset
Tue -- 07:40 PM PST     -0.93 knots Max Ebb
Tue -- 10:18 PM PST     0.00 knots Slack
Tue -- 10:54 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.31.51.410.5-0.1-0.7-1.1-1-0.6-0.20.40.91.31.310.60.1-0.4-0.8-0.9-0.6-0.10.3

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 (10,2,3,4)
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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.