Friday, February23, 2018 L-36.com


Marine Weather and Tides
Larkspur, 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 6:46AMSunset 5:59PM Friday February 23, 2018 6:31 PM PST (02:31 UTC) Moonrise 11:42AMMoonset 1:06AM Illumination 64% Phase: Waxing Gibbous; Moon at 9 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- 210 Pm Pst Fri Feb 23 2018
Tonight..W winds 5 to 15 kt.
Sat..W winds 10 to 20 kt.
Sat night..NW winds 10 to 20 kt.
Sun..W winds 10 to 20 kt.
Sun night..W winds 15 to 25 kt. Chance of showers after midnight.
Mon..NW winds 15 to 25 kt. Chance of showers, then slight chance of showers.
Tue..NW winds 15 to 25 kt...becoming W 5 to 15 kt.
Wed..W winds 5 to 15 kt. Slight chance of showers.
PZZ500 210 Pm Pst Fri Feb 23 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gusty northerly winds will continue across the waters through the weekend as high pressure sits over the eastern pacific. An upper level system will move through the region on Monday bringing increasing winds, fresh swell, and scattered showers to the coastal waters.

7 Day Forecast for Marine Location Near Larkspur, CA
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location: 37.94, -122.53     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 240038
afdmtr
area forecast discussion
national weather service san francisco bay area
438 pm pst Fri feb 23 2018

Synopsis Mostly sunny skies will prevail around the bay area
today. Another very cool night is forecast for Friday night. Dry
weather and slightly warmer temperatures are expected over the
weekend. Cooler, unsettled weather is expected to return by early
next week with another system bringing rain to the area later next
week.

Discussion As of 01:58 pm pst Friday... Abundant sunshine
blankets the bay area this afternoon and most of the state for
that matter. Despite the afternoon sunshine temperatures are still
running several degrees below normal. MAX temps will likely top
in the lower to mid 50s for most locations. The higher peaks in
the region a much colder: diablo low 30s, mt hamilton and chews
ridge mid-upper 20s. Afternoon modis imagery still shows some
lingering snow over the higher peaks in monterey san benito
counties.

For tonight, clear skies will continue leading to another cold
night, especially away from the coast and major urban centers.

Lows tonight will be in the 20s to lower 30s across the interior
and inland valleys. Closer to the coast and major urban centers
will be mid 30s to lower 40s. Needless to say some frost will be
possible.

Dry weekend ahead as the bay area remains in a cold dry northwest
flow. There is a slight uptick in 500 mb heights and 850 mb temps,
especially on Sunday, leading to a slight warming trend. That
being said, temperatures will still be below normal for this time
of year, but interior locations may crack 60 degs by Sunday.

Overnight lows will still be cold and frost will be possible
again Saturday night.

Want to at least mention that embedded in the long wave trough a
weak short-wave trough slides through NE california on Saturday
afternoon evening. Moisture seems limited to NE of the bay area.

Therefore, will not include any precip at this time.

Latest model guidance continues to bring another re-enforcing
upper trough late Sunday into Monday. Better dynamics and better
moisture will allow for an increased chance of precip. Current
forecast will bring showers into the north bay early Monday and
then spread southward through the day and even into early Tuesday.

Rainfall amounts will generally be a few hundredths to a few
tenths over the higher peaks. Snow levels will initially be 2,500
feet and above and then gradually drop through the day. Similar to
the last few system minor snow accumulations will be possible
with the santa lucias receiving the most.

Brief break Tuesday into Wednesday with a short-wave ridge. If the
long are right, and they have been showing this solution for
several runs now, late next week could be interesting.

Deterministic and ensembles means bring one of the more "robust"
storm system into ca as of late. Lots of details will need to be
sorted out between now and then, but timing looks to be right at
the end of the month. Stay tuned...

Aviation As of 4:38 pm pst Friday...VFR. 24 hour trends indicate
much drier conditions settling in today, dewpoint temperatures
have tumbled downward double digits into the teens and 20s. W-nw
winds near 10 knots this evening will tend to shift to light land
breezes tonight as land temperatures become colder, more dense
compared to relatively milder, less dense temperatures over the
ocean and bays. Any lingering snow cover enhancing outgoing
longwave radiative cooling in the mountains of the central coast
may add to e-se drainage winds overnight into Saturday morning in
the salinas valley.

Vicinity of ksfo...VFR. West to northwest winds 10 to 20 kt becoming
light later this evening.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR through the period with mainly clear skies.

Onshore winds becoming e-se tonight, possibly gusty in the salinas valley
overnight into Saturday morning.

Marine As of 4:00 pm pst Friday... Gusty northerly winds will continue
across the waters through the weekend as high pressure sits over the
eastern pacific. An upper level system will move through the region
on Monday bringing increasing winds, fresh swell, and scattered showers
to the coastal waters.

Climate
Here are the record low temperatures and the years they occurred for
Saturday, february 24.

Location Saturday
sf bay area
healdsburg 29 in 1944
santa rosa 28 in 1920
calistoga 29 in 1982
kentfield 29 in 1955
san rafael 34 in 2017
napa 30 in 1919
san francisco 40 in 1891
sfo airport 35 in 1955
half moon bay 33 in 2017
oakland airport 36 in 2015
richmond 36 in 1955
livermore 29 in 1987
moffett field 34 in 2017
san jose 26 in 1897
gilroy 28 in 1960
monterey bay area
santa cruz 29 in 1925
salinas 31 in 1982
salinas airport 30 in 1953
monterey 37 in 1955
king city 24 in 1982

Mtr watches warnings advisories
Tngt Sca... Pigeon pt to pt pinos 0-10 nm until 10 pm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Pt pinos to pt piedras blancas 0-10 nm until 9 pm
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
public forecast: mm
aviation: canepa
marine: as
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TIBC1 - Tiburon Pier, San Francisco Bay, CA 6 mi53 min NW 2.9 49°F 1028 hPa
RCMC1 - 9414863 - Richmond, CA 6 mi44 min NW 8.9 G 11 51°F 53°F1028 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi44 min W 6 G 9.9 52°F 1028.3 hPa
FTPC1 - 9414290 - San Francisco, CA 10 mi44 min W 6 G 11 49°F 52°F1028.7 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 12 mi44 min WSW 8.9 G 14 49°F 1027.2 hPa
PXSC1 12 mi44 min 50°F 35°F
46237 - San Francisco Bar, CA (142) 12 mi62 min 52°F6 ft
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 14 mi44 min W 13 G 17
OBXC1 14 mi44 min 49°F 36°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 14 mi44 min WNW 9.9 G 13 49°F 1028.2 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 16 mi44 min NW 13 G 14 51°F 1027.9 hPa
AAMC1 - 9414750 - Alameda, CA 17 mi44 min W 11 G 14 50°F 53°F1028.2 hPa
LNDC1 17 mi44 min W 6 G 8.9 50°F 1028.1 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 21 mi42 min NW 16 G 18 48°F 50°F6 ft1028.7 hPa (+0.0)
MZXC1 - 9415102 - Martinez-Amorco CA 22 mi44 min W 6 G 7 52°F 52°F1028.1 hPa32°F
PRYC1 - 9415020 - Point Reyes, CA 24 mi44 min WNW 11 G 13 51°F1028.5 hPa
PCOC1 - 9415144 - Port Chicago, CA 27 mi44 min ENE 5.1 G 8 52°F 52°F1027.7 hPa
SFXC1 - San Francisco Bay Reserve, CA 32 mi107 min N 5.1 55°F 1028 hPa11°F
RTYC1 - 9414523 - Redwood City, CA 34 mi44 min W 7 G 9.9 49°F 53°F1028.5 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 35 mi44 min NNE 5.1 G 7 51°F 1027.7 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 44 mi42 min NNW 16 G 18 49°F 52°F8 ft1028.4 hPa (+0.0)
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 46 mi32 min NW 19 G 27 48°F 50°F1029.1 hPa (-0.3)37°F

Wind History for Richmond, CA
(wind in knots)    EDIT      (on/off)   Help
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Last
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NW14
G18
NW13
G18
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G18
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G14
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G15
NW11
G16
NW11
G17
NW13
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N12
G15
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G13
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G12
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G6
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G11
1 day
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NW9
G13
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G13
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G8
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G6
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G9
W6
G11
NW7
G10
W6
G9
W6
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G11
W9
G12
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G16
NW12
G17
NW10
NW14
G18
NW14
G18
NW8
G13
NW14
G19
NW13
G22
NW16
G23
NW15
G25
NW13
NW16
G22
NW16
G24
2 days
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W7
G11
NW8
G11
NW6
G9
NW5
W1
--
W2
NW1
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E4
E1
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E4
G8
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G11
NE6
G9
NE4
SE2
G10
NW9
G12
W1
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SW7
G10
W6
G10

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA14 mi57 minN 010.00 miFair48°F28°F46%1028.4 hPa
Petaluma Municipal Airport, CA22 mi37 minW 310.00 miFair46°F28°F50%1028.8 hPa
Oakland, Metro Oakland International Airport, CA23 mi39 minWNW 1310.00 miFair49°F34°F56%1028.4 hPa
Napa, Napa County Airport, CA23 mi38 minW 810.00 miFair46°F30°F56%1027.3 hPa
San Francisco, San Francisco International Airport, CA24 mi36 minW 1610.00 miFair48°F32°F54%1028.4 hPa

Wind History from DVO (wind in knots)
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Last 24hrW14
G19
NW12
G19
NW15
G21
NW8
G15
NW10NW13NW15NW14
G20
NW14NW15
G24
NW13NW12
G19
NW9NW9NW8CalmN6
G11
6W83NW7NW8CalmNE5
1 day agoCalmE43CalmCalmCalmCalmN4CalmCalmW6W6W10
G18
NW14NW14NW12W15
G20
W12
G21
W18
G25
W16
G25
W16
G22
W13W17
G26
W9
G15
2 days agoCalmE5CalmCalmCalmCalmCalmCalmCalmCalmNE4CalmCalmCalmSE5E5SE5SE5CalmCalmW3W5SW10
G15
NE4

Tide / Current Tables for Corte Madera Creek, San Francisco Bay, California
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Corte Madera Creek
Click for Map
Fri -- 12:09 AM PST     First Quarter
Fri -- 01:05 AM PST     Moonset
Fri -- 05:23 AM PST     5.79 feet High Tide
Fri -- 06:49 AM PST     Sunrise
Fri -- 11:41 AM PST     Moonrise
Fri -- 12:31 PM PST     0.56 feet Low Tide
Fri -- 05:57 PM PST     Sunset
Fri -- 07:29 PM PST     4.00 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.433.84.65.35.85.75.24.33.11.91.10.60.611.62.333.6443.73.22.8

Tide / Current Tables for Point San Quentin 1.9 mi E, San Francisco Bay, California Current
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Point San Quentin 1.9 mi E
Click for Map
Fri -- 12:09 AM PST     First Quarter
Fri -- 01:05 AM PST     Moonset
Fri -- 01:19 AM PST     0.00 knots Slack
Fri -- 04:17 AM PST     1.13 knots Max Flood
Fri -- 06:49 AM PST     Sunrise
Fri -- 07:10 AM PST     -0.01 knots Slack
Fri -- 10:45 AM PST     -2.34 knots Max Ebb
Fri -- 11:41 AM PST     Moonrise
Fri -- 02:46 PM PST     0.00 knots Slack
Fri -- 05:33 PM PST     1.35 knots Max Flood
Fri -- 05:57 PM PST     Sunset
Fri -- 08:54 PM PST     -0.01 knots Slack
Fri -- 11:21 PM PST     -1.19 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.7-0.20.30.81.110.70.1-0.7-1.5-2.2-2.3-1.9-1.3-0.60.20.91.31.31.10.6-0.1-0.8-1.2

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 (21,6,7,8)
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Ground Weather Radar Station Sacramento, 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.