Thursday, February22, 2018 L-36.com


Marine Weather and Tides
Pescadero, 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 5:57PM Thursday February 22, 2018 2:40 AM PST (10:40 UTC) Moonrise 10:58AMMoonset 12:00AM Illumination 46% Phase: First Quarter Moon; Moon at 7 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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PZZ560 Pigeon Point To Point Pinos To 10 Nm- 902 Pm Pst Wed Feb 21 2018
.small craft advisory in effect from 3 am pst Thursday through late Thursday night...
Tonight..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 3 to 4 ft at 14 seconds.
Thu..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. NW swell 4 ft at 17 seconds. Slight chance of showers in the morning, then chance of showers in the afternoon.
Thu night..NW winds 20 to 30 kt. Wind waves 5 to 7 ft. W swell 5 to 6 ft at 19 seconds. Chance of showers in the evening, then slight chance of showers after midnight.
Fri..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. W swell 6 to 7 ft at 18 seconds.
Fri night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 6 to 8 ft at 16 seconds.
Sat..NW winds 15 to 25 kt. Wind waves 5 to 7 ft. W swell 4 to 6 ft.
Sun..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 3 to 5 ft...shifting to the nw.
Mon..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 3 to 4 ft. Chance of showers.
PZZ500 902 Pm Pst Wed Feb 21 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will increase to gale force over the outer waters Thursday afternoon and evening after an upper level shortwave passes through. The strong winds will bring steep fresh swell.

7 Day Forecast for Marine Location Near Pescadero, CA
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location: 37.18, -122.39     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 220635
afdmtr
area forecast discussion
national weather service san francisco bay area
1035 pm pst Wed feb 21 2018

Synopsis A weak weather system will impact the region tomorrow
bringing widely scattered showers, a slight chance of
thunderstorms in the afternoon, and lowering snow levels. This
system will also bring gusty winds tomorrow and colder
temperatures by Friday morning. Dry weather and slightly warmer
temperatures are likely for the weekend. Cooler, unsettled
weather potentially returns early next week.

Discussion As of 9:00 pm pst Wednesday... A weak weather system
brought isolated showers to our region today, but for the most
part today was a dry and cool day under mostly sunny skies.

Afternoon highs were a few degrees warmer than yesterday.

Evening satellite imagery shows the next cold weather system over
the pacific northwest, dropping to the south. Because this system
originated over western canada, it does not have a whole lot of
moisture to work with. Therefore, by the time this system sweeps
into our area tomorrow afternoon, it's expected to produce only
widely scattered showers. Models also indicate there may be
sufficient instability for isolated thunderstorms in the
afternoon, mainly over the north and east bay. Isolated showers
and thunderstorms may produce small hail and snow levels are
expected to drop as low as 1800 feet by late afternoon.

Precipitation is expected to taper off early Thursday evening and
end by late evening. Rainfall totals are forecast to be less than
a tenth of an inch, except perhaps a bit more in the santa lucias.

Only a dusting of snow is likely at higher elevations.

Tomorrow's system is also expected to produce blustery conditions
by afternoon. Northwest winds are forecast to gust as high as 40
mph along the coast and in the hills, and locally higher in the
winder locations. Breezy conditions will persist into the early
evening and then winds will subside overnight.

The incoming system will bring a reinforcing shot of cold air into
our region with 850 mb temps forecast to drop as low as minus 5
deg c by late tomorrow. Once winds decrease and skies clear later
tomorrow night, look for temperatures to drop to freezing, or
slightly below, across inland areas. Temperatures on Thursday
night aren't forecast to be quite as cold as they were on Monday
night, but close. The airmass will begin to moderate by Friday
night. However, winds will be lighter and the airmass will be
drier by then. So, overnight lows on Friday night could be just as
cold as Thursday night.

Dry conditions are forecast over the weekend, along with gradual
warming. Even with the expected warming, temperatures will be
about five degrees cooler than normal this weekend as a cool
northwest flow persists across california.

The medium range models maintain a cool and unsettled weather
pattern going into next week. A system arriving from the north
late Sunday night and Monday is forecast to track slightly farther
to the west compared to systems this week, and thus have greater
over water trajectory and moisture. Thus, on Monday we could see
more widespread precipitation as well as greater precipitation
amounts. Snow levels are currently projected at around 2500 feet.

In the longer range, the models agree that more wet and cool
weather is likely again later next week.

Aviation As of 10:30 pm pst Wednesday...VFR conditions are
expected this evening before another upper level shortwave
approaches the area late tonight. Models indicate lower level
moisture after 09z but only lasting a few hours as strong
northerly winds help to clear out the clouds after 14-15z.

Vicinity of ksfo...VFR except for a period of lower clouds between
10z-13z possibly lowering into MVFR range. West to northwest winds
increasing to 10 kt in the morning then ramping up to 25-28 kt
gusting 32-34 kt after 23z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR. Scattered clouds developing Thursday
morning.

Marine As of 10:23 pm pst Wednesday... Winds will increase to
gale force over the outer waters Thursday afternoon and evening
after an upper level shortwave passes through. The strong winds
will bring steep fresh swell.

Mtr watches warnings advisories
Tngt Sca... Mry bay from 3 am
sca... Pt reyes to pigeon pt 0-10 nm from 3 am
sca... Pigeon pt to pt pinos 0-10 nm from 3 am
sca... Pt pinos to pt piedras blancas 0-10 nm from 3 am
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... Sf bay from 3 am
public forecast: dykema
aviation: W pi
marine: W pi
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 24 mi41 min S 1.9 G 2.9 45°F 54°F1023.3 hPa (-0.5)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 27 mi51 min NNW 12 G 16 50°F 54°F6 ft1023 hPa (+0.0)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 29 mi51 min NW 16 G 19 50°F 53°F6 ft1022.8 hPa (-0.3)
46114 - West Monterey Bay, CA 32 mi41 min 54°F7 ft
46092 - MBM1 35 mi96 min N 7.8 49°F 52°F1022.9 hPa (+0.3)
AAMC1 - 9414750 - Alameda, CA 41 mi41 min W 12 G 16 48°F 53°F1022.5 hPa (-0.6)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 43 mi41 min W 14 G 16
PXOC1 - 9414311 - San Francisco (Pier 1), CA 43 mi41 min W 6 G 8.9 47°F 1021.6 hPa (-0.3)
PXSC1 43 mi41 min 48°F 40°F
OBXC1 43 mi41 min 48°F 39°F
FTPC1 - 9414290 - San Francisco, CA 43 mi41 min WSW 5.1 G 7 47°F 53°F1022.8 hPa (-0.5)
LNDC1 43 mi41 min WNW 8 G 13 48°F 1022.4 hPa (-0.6)
ELXC1 - Elkhorn Slough Reserve, CA 43 mi56 min NNE 1 39°F 1023 hPa37°F
46237 - San Francisco Bar, CA (142) 44 mi41 min 52°F5 ft
OKXC1 - 9414776 - Oakland (Berth 34), CA 44 mi41 min W 12 G 13 48°F 1022.5 hPa (-0.5)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 46 mi51 min WNW 19 G 21 49°F 51°F6 ft1022.7 hPa (-0.5)
46240 - Cabrillo Point, Monterey Bay, CA (158) 46 mi80 min 54°F3 ft
MEYC1 48 mi65 min SSE 2.9 G 2.9 45°F 55°F1023.6 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 49 mi32 min WSW 2.9 44°F 1022 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA24 mi46 minNNW 1010.00 miOvercast48°F39°F71%1022.3 hPa

Wind History from PAO (wind in knots)
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Last 24hr------------------CalmCalm44CalmCalm6N6----NW8NW8W7NW7Calm
1 day ago------------------CalmCalmCalm--NE5555--NW7W7NW7W65Calm
2 days ago------------------6NW8
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Tide / Current Tables for Ano Nuevo Island, California
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Ano Nuevo Island
Click for Map
Thu -- 02:28 AM PST     4.98 feet High Tide
Thu -- 06:49 AM PST     Sunrise
Thu -- 09:22 AM PST     0.86 feet Low Tide
Thu -- 10:58 AM PST     Moonrise
Thu -- 03:51 PM PST     3.24 feet High Tide
Thu -- 05:56 PM PST     Sunset
Thu -- 09:02 PM PST     2.22 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.94.54.94.94.53.82.81.91.20.90.91.31.82.32.83.13.23.12.92.62.32.22.42.8

Tide / Current Tables for Half Moon Bay, California
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Half Moon Bay
Click for Map
Thu -- 02:46 AM PST     5.39 feet High Tide
Thu -- 06:50 AM PST     Sunrise
Thu -- 09:37 AM PST     0.96 feet Low Tide
Thu -- 10:58 AM PST     Moonrise
Thu -- 04:09 PM PST     3.65 feet High Tide
Thu -- 05:56 PM PST     Sunset
Thu -- 09:17 PM PST     2.33 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
44.75.35.45.14.33.32.31.5111.31.82.433.53.63.63.32.92.52.32.42.8

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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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.