Friday, February23, 2018 L-36.com


Marine Weather and Tides
Moss Beach, 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 6:39 PM PST (02:39 UTC) Moonrise 11:43AMMoonset 1:05AM 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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PZZ545 Point Reyes To Pigeon Point To 10 Nm- 210 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 10 to 20 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 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 Moss Beach, CA
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location: 37.51, -122.56     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
RTYC1 - 9414523 - Redwood City, CA 18 mi51 min W 7 G 9.9 49°F 53°F1028.5 hPa
46237 - San Francisco Bar, CA (142) 19 mi69 min 52°F6 ft
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 20 mi49 min NNW 16 G 18 49°F 52°F8 ft1028.4 hPa (+0.0)
FTPC1 - 9414290 - San Francisco, CA 21 mi51 min W 6 G 11 49°F 52°F1028.7 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 22 mi51 min WSW 8.9 G 14 49°F 1027.2 hPa
PXSC1 22 mi51 min 50°F 35°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 22 mi49 min NW 16 G 18 48°F 50°F6 ft1028.7 hPa (+0.0)
AAMC1 - 9414750 - Alameda, CA 23 mi51 min W 11 G 14 50°F 53°F1028.2 hPa
OBXC1 23 mi51 min 49°F 36°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 24 mi51 min W 13 G 17
OKXC1 - 9414776 - Oakland (Berth 34), CA 24 mi51 min WNW 9.9 G 13 49°F 1028.2 hPa
LNDC1 25 mi51 min W 6 G 8.9 50°F 1028.1 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 27 mi60 min NW 2.9 49°F 1028 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 29 mi51 min W 6 G 9.9 52°F 1028.3 hPa
RCMC1 - 9414863 - Richmond, CA 30 mi51 min NW 8.9 G 11 51°F 53°F1028 hPa
PRYC1 - 9415020 - Point Reyes, CA 40 mi51 min WNW 11 G 13 51°F1028.5 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 41 mi51 min NW 13 G 14 51°F 1027.9 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi51 min W 6 G 7 52°F 52°F1028.1 hPa32°F
PCOC1 - 9415144 - Port Chicago, CA 47 mi51 min ENE 5.1 G 8 52°F 52°F1027.7 hPa

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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W15
G25
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G30
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W7
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W10
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G8
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G11

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA3 mi44 minNNW 12 G 178.00 miFair46°F35°F66%1027.8 hPa
San Francisco, San Francisco International Airport, CA13 mi43 minW 1610.00 miFair48°F32°F54%1028.4 hPa
San Carlos Airport, CA16 mi52 minW 810.00 miClear48°F28°F46%1028.1 hPa
Oakland, Metro Oakland International Airport, CA22 mi46 minWNW 1310.00 miFair49°F34°F56%1028.4 hPa
Palo Alto Airport, CA23 mi3.9 hrsNNW 1010.00 miClear0°F0°F%1028.1 hPa

Wind History from HAF (wind in knots)
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Last 24hrNW23
G31
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G25
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N19
G28
N15
G24
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N9
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N4NE4CalmN5N7
G14
NW12
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NW13NW12NW13NW14NW15NW15N13
G19
N12
1 day agoN8N9NW13NW10N10N8NW10NW13NW16
G22
NW14
G20
NW16
G24
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G20
NW17
G27
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G28
N21
G32
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NW14NW12
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NW13NW14
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2 days agoNW9
G14
NW8NW7CalmCalmCalmCalmCalmE3NE4NE4CalmCalmCalmSW3--NW9NW9NW9NW11NW9NW11NW9N6

Tide / Current Tables for Princeton, Half Moon Bay, California
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Princeton
Click for Map
Fri -- 12:09 AM PST     First Quarter
Fri -- 01:04 AM PST     Moonset
Fri -- 03:40 AM PST     5.48 feet High Tide
Fri -- 06:49 AM PST     Sunrise
Fri -- 10:49 AM PST     0.59 feet Low Tide
Fri -- 11:42 AM PST     Moonrise
Fri -- 05:46 PM PST     3.69 feet High Tide
Fri -- 05:57 PM PST     Sunset
Fri -- 10:29 PM PST     2.66 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.54.24.95.45.55.14.33.32.21.30.70.60.81.422.63.23.63.73.53.22.92.72.7

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
Fri -- 12:09 AM PST     First Quarter
Fri -- 01:04 AM PST     Moonset
Fri -- 02:51 AM PST     0.68 knots Max Flood
Fri -- 05:52 AM PST     -0.01 knots Slack
Fri -- 06:48 AM PST     Sunrise
Fri -- 09:26 AM PST     -1.17 knots Max Ebb
Fri -- 11:41 AM PST     Moonrise
Fri -- 01:01 PM PST     0.00 knots Slack
Fri -- 04:07 PM PST     0.81 knots Max Flood
Fri -- 05:57 PM PST     Sunset
Fri -- 07:36 PM PST     -0.01 knots Slack
Fri -- 10:02 PM PST     -0.59 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.40.60.70.60.3-0.1-0.5-0.9-1.1-1.1-0.8-0.5-00.40.70.80.80.60.2-0.2-0.5-0.6-0.5

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 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.