Saturday, February24, 2018 L-36.com


Marine Weather and Tides
Pacifica, 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 6:45AMSunset 6:00PM Saturday February 24, 2018 2:23 AM PST (10:23 UTC) Moonrise 12:32PMMoonset 2:10AM Illumination 67% 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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PZZ545 Point Reyes To Pigeon Point To 10 Nm- 849 Pm Pst Fri Feb 23 2018
.small craft advisory in effect through late Saturday night...
Tonight..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 3 to 5 ft at 16 seconds.
Sat..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. W swell 3 to 5 ft at 15 seconds.
Sat night..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. W swell 3 to 5 ft at 15 seconds.
Sun..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 3 to 5 ft at 15 seconds.
Sun night..W winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 4 to 6 ft at 15 seconds. Slight chance of showers after midnight.
Mon..NW winds 20 to 30 kt. Wind waves 4 to 6 ft. NW swell 5 to 7 ft. Chance of showers, then slight chance of showers.
Tue..NW winds 20 to 30 kt. Wind waves 3 to 5 ft. NW swell 5 to 7 ft.
Wed..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 4 to 6 ft. Slight chance of showers.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 5 to 7 ft at 14 seconds Friday. Across the bar...combined seas 6 to 9 feet at at 14 seconds Friday. Maximum ebb current of 1.3 knots at 11:07 pm Friday and 2.8 knots at 10:43 am Saturday.
PZZ500 849 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 north to northwest winds will continue across the coastal waters through the weekend as high pressure sits over the eastern pacific. On Monday an upper level low pressure system will move south bringing a cold front over the waters resulting in increasing winds, fresh swell, and scattered showers.

7 Day Forecast for Marine Location Near Pacifica, CA
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location: 37.62, -122.51     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 240635
afdmtr
area forecast discussion
national weather service san francisco bay area
1035 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 9:15 pm pst Friday... Cold northerly flow
aloft continues over the area. Another cold night is expected
tonight due to clear skies, light winds, and low dew points. A
freeze warning is issued for the interior of monterey and san
benito counties from midnight through 9 am Saturday for
temperatures dropping into the 20s. Interior locations of the sfo
bay area will also be cold enough for patchy frost.

Dry weather continues through Sunday as the next system drops into
the great basin. Rain will stay east of the district but there may
be some cumulus clouds during the day Saturday. The coldest air
will shift further to the east so overnight lows for Saturday
night will be about 3-5 degrees warmer.

Model runs from the past few days have been advertising an
increasing chance of rain late Sunday night and Monday as the
next system drops south along the west coast picking up more
overwater trajectory. Rainfall amounts are expected to range from
one-tenth inch in the valleys to one-quarter inch in the hills.

Snow levels will initially be around 2500 feet then drop during
the day Monday so we could see snow on the highest peaks.

Medium range models show a wet pattern finally setting up off the
west coast next week. Synoptically the polar low over the hudson
bay which has kept the ridge over us has been displaced
temporarily and this will allow troughs to set up over the
eastern pacific. The next chance of rain will be Thursday.

Aviation As of 10:34 pm pst Friday...VFR. Light onshore wind will
tend to shift to a light land breeze tonight as air temperatures over
land become colder, more dense compared to relatively milder, less
dense air temperatures over the ocean and bays. Lingering snow cover
enhancing radiative cooling in the mountains of the central coast may
add to e-se cold air drainage winds overnight into Saturday morning
in the salinas valley.

Vicinity of ksfo...VFR. Light to calm wind tonight, becoming westerly
10-15 knots Saturday afternoon and evening.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR, winds becoming e-se tonight, possibly
gusty in the salinas valley overnight into Saturday morning.

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

Marine As of 10:28 pm pst Friday... Gusty north to northwest winds
will continue across the coastal waters through the weekend as high
pressure sits over the eastern pacific. On Monday an upper level low
pressure system will move south bringing a cold front over the waters
resulting in increasing winds, fresh swell, and scattered showers.

Mtr watches warnings advisories
Tngt Freeze warning... San benito and interior monterey counties
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
public forecast: W pi
aviation marine: canepa
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FTPC1 - 9414290 - San Francisco, CA 13 mi60 min SSW 2.9 G 4.1 43°F 52°F1029.7 hPa
46237 - San Francisco Bar, CA (142) 13 mi54 min 51°F6 ft
PXSC1 14 mi54 min 48°F 40°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 14 mi54 min ESE 6 G 7 47°F 1028.5 hPa
AAMC1 - 9414750 - Alameda, CA 15 mi60 min E 4.1 G 5.1 43°F 53°F1029.5 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 16 mi54 min SE 2.9 G 5.1 44°F 1029.6 hPa
OBXC1 16 mi54 min 45°F 33°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 16 mi54 min SE 5.1 G 6
LNDC1 17 mi54 min ESE 2.9 G 4.1 44°F 1029.5 hPa
RTYC1 - 9414523 - Redwood City, CA 18 mi54 min SSE 2.9 G 4.1 39°F 52°F1030.1 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 19 mi60 min SW 1.9 43°F 1029 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 20 mi94 min NW 14 G 18 48°F 50°F7 ft1029.5 hPa (+0.0)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi54 min ENE 1.9 G 2.9 45°F 1029.7 hPa
RCMC1 - 9414863 - Richmond, CA 22 mi60 min WNW 2.9 G 4.1 46°F 52°F1029.2 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 26 mi94 min NNW 18 G 21 49°F 52°F8 ft1029.3 hPa (+0.0)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 33 mi54 min SW 4.1 G 5.1 44°F 1029.2 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 35 mi54 min S 1.9 G 4.1 42°F 51°F1029.4 hPa32°F
PRYC1 - 9415020 - Point Reyes, CA 36 mi54 min WNW 13 G 17 50°F1029 hPa
PCOC1 - 9415144 - Port Chicago, CA 39 mi54 min S 8 G 8.9 37°F 51°F1029.2 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 44 mi54 min WNW 2.9 G 5.1 45°F 1029 hPa
SFXC1 - San Francisco Bay Reserve, CA 48 mi99 min Calm 32°F 1029 hPa24°F

Wind History for San Francisco, CA
(wind in knots)    EDIT      (on/off)   Help
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W4
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G9
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NW5
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA8 mi29 minN 010.00 miFair32°F28°F87%1028.8 hPa
San Francisco, San Francisco International Airport, CA8 mi88 minN 010.00 miFair42°F33°F71%1029.6 hPa
San Carlos Airport, CA15 mi29 minN 010.00 miFair36°F23°F60%1029.8 hPa
Oakland, Metro Oakland International Airport, CA16 mi31 minE 310.00 miA Few Clouds37°F30°F76%1029.8 hPa
Hayward, Hayward Air Terminal, CA21 mi30 minE 310.00 miFair37°F24°F59%1030.6 hPa

Wind History from HAF (wind in knots)
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Last 24hrN11
G17
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N4NE4CalmN5N7
G14
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NW13NW12NW13NW14NW15NW15N13
G19
N12N9N5NE3E5CalmCalmNE3Calm
1 day agoNW16
G22
NW14
G20
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G24
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NW14NW12
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2 days agoE3NE4NE4CalmCalmCalmSW3--NW9NW9NW9NW11NW9NW11NW9N6N8N9NW13NW10N10N8NW10NW13

Tide / Current Tables for Seaplane Harbor, San Francisco Bay, California
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Seaplane Harbor
Click for Map
Sat -- 12:22 AM PST     2.66 feet Low Tide
Sat -- 02:09 AM PST     Moonset
Sat -- 06:29 AM PST     7.31 feet High Tide
Sat -- 06:47 AM PST     Sunrise
Sat -- 12:32 PM PST     Moonrise
Sat -- 01:52 PM PST     0.15 feet Low Tide
Sat -- 05:58 PM PST     Sunset
Sat -- 08:53 PM PST     5.69 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.72.83.44.45.56.67.27.26.75.542.41.20.40.20.51.42.43.64.75.45.75.34.5

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
Sat -- 12:48 AM PST     0.00 knots Slack
Sat -- 02:09 AM PST     Moonset
Sat -- 03:56 AM PST     0.68 knots Max Flood
Sat -- 06:47 AM PST     Sunrise
Sat -- 06:54 AM PST     -0.01 knots Slack
Sat -- 10:29 AM PST     -1.26 knots Max Ebb
Sat -- 12:31 PM PST     Moonrise
Sat -- 02:07 PM PST     0.01 knots Slack
Sat -- 05:20 PM PST     0.94 knots Max Flood
Sat -- 05:58 PM PST     Sunset
Sat -- 08:45 PM PST     -0.01 knots Slack
Sat -- 11:10 PM PST     -0.61 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.20.10.30.60.70.60.3-0-0.5-1-1.2-1.2-1-0.6-0.10.40.80.90.90.70.3-0.1-0.5-0.6

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 (5,6,7,8)
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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.