Thursday, March21, 2019 L-36.com


Marine Weather and Tides
La Honda, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:08AMSunset 7:22PM Thursday March 21, 2019 4:30 AM PDT (11:30 UTC) Moonrise 7:25PMMoonset 6:55AM Illumination 100% Phase: Full Moon; Moon at 15 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 Coastal Waters From Pigeon Point To Point Pinos California Out To 10 Nm- 219 Am Pdt Thu Mar 21 2019
Today..SE winds 5 to 15 kt...becoming W 5 to 10 kt this afternoon. Wind waves 2 ft or less. W swell 6 to 8 ft at 15 seconds and S 1 to 2 ft at 15 seconds. A slight chance of showers this morning.
Tonight..SW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 6 to 7 ft at 19 seconds and S 1 to 2 ft at 15 seconds.
Fri..S winds 10 to 20 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. W swell 3 to 6 ft at 18 seconds and S 1 to 2 ft at 14 seconds. Rain likely.
Fri night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 6 to 9 ft at 17 seconds and S around 1 ft at 14 seconds. Rain.
Sat..NW winds 5 to 15 kt. Wind waves 2 ft or less. W swell 10 to 12 ft at 16 seconds and S around 1 ft at 13 seconds.
Sat night..N winds 5 to 15 kt. Wind waves 2 ft or less. W swell 10 to 12 ft at 16 seconds and S around 1 ft at 13 seconds.
Sun..S winds up to 10 kt. Wind waves 2 ft or less. W swell 8 to 11 ft and S around 1 ft. A chance of rain.
Mon..S winds 5 to 15 kt. Wind waves 2 ft or less. W swell 6 to 8 ft and S around 1 ft. A chance of rain.
PZZ500 219 Am Pdt Thu Mar 21 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Rain shower chances will continue through the early morning hours, mainly from pigeon point and locations south. Weak high pressure will build off the southern california coast through the day bringing light west to northwest winds. Winds will turn southerly and increase on Friday as a frontal system moves in. A moderate- period west swell will continue through Thursday before a longer period west to northwest swell arrives on Friday.


7 Day Forecast for Marine Location Near La Honda, CA
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location: 37.3, -122.29     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 211046
afdmtr
area forecast discussion
national weather service san francisco bay area
346 am pdt Thu mar 21 2019

Synopsis Isolated showers will be possible across the region
through early afternoon, especially along coastal areas of the
central coast. Dry conditions develop tonight ahead of the next
frontal system that will bring widespread rainfall to the region
Friday into Friday night. Mainly dry conditions return for a
majority of the weekend with unsettled weather likely throughout
at least the first half of next week.

Discussion As of 03:46 am pdt Thursday... A weak short-wave
disturbance approaching the coast this morning has resulted rain
showers off of the big sur coast which are beginning to push
inland. Elsewhere, mainly dry weather conditions prevail with
temperatures ranging from the upper 30s in the north bay valleys
to middle upper 40s elsewhere (near 50 around san francisco). As
the weak system pushes inland through the day, cannot rule out
isolated showers from the big sur coast up to the santa cruz
mountains. The short-range models do indicate the potential for
isolated showers as far north as the greater san francisco bay
area as well. However, widespread rainfall is unlikely with any
lingering showers likely to diminish through the evening. Daytime
temperatures are forecast to warm into the upper 50s near the
coast to middle 60s inland.

Dry weather conditions are then forecast tonight into early Friday
morning ahead of an approaching frontal boundary. This next system
will move from northwest to southeast across the region on Friday
with light to occasionally moderate rainfall. Most indications are
the santa cruz mountains northward through the north bay will see the
most with amounts from 0.50" to 0.75" in most urban areas (lesser
amounts in the east bay valleys and south bay). Meanwhile, 1.00" to
1.50" will be possible in the coastal ranges and north bay hills.

Rainfall amounts will tapper off across the central coast with most
locations picking up less than 0.25". Locally breezy conditions are
also expected ahead of and in wake of the frontal passage with gusts
to around 35 to 40 mph. Post frontal showers may linger into Friday
night before diminishing region-wide on Saturday. Saturday and
Sunday appear to be mainly dry in between weather systems with
daytime temperatures generally in the 60s on Saturday to potentially
upper 60s (inland) by Sunday.

Weather conditions next week continue to look unsettled with another
round of precipitation returning as early as Sunday night. However,
the forecast models don't agree on the specifics to timing, amounts
and location of heaviest precipitation at this time. With this said,
the ensembles point toward the potential for more widespread
rainfall through at least the first half of next week. The forecast
will be worth monitoring in the coming days.

Aviation As of 10:50 pm pdt Wednesday... Clear skies this
evening with only some high cirrus clouds. An upper low will move
southeast across the coastal waters later tonight. Clouds should
increase but CIGS expected to stay around 5000 ft. Latest hi-res
models bring light rain very close to mry bay Thursday morning and
there is a possibility mry will get some drops. Also cannot rule
out fog at sts tonight.

Vicinity of ksfo...VFR with CIGS 4000-5000 ft Thursday morning.

Clouds decreasing in the afternoon. Light southeast winds in the
morning becoming west 10-15 kt in the afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Mostly clear skies this evening except
for some high cirrus clouds. CIGS 4000-5000 ft after 12z with a
scattered lower deck. Cannot rule out a shower or two over mry.

Clearing after 17z.

Marine As of 03:46 am pdt Thursday... Rain shower chances will
continue through the early morning hours, mainly from pigeon point
and locations south. Weak high pressure will build off the
southern california coast through the day bringing light west to
northwest winds. Winds will turn southerly and increase on Friday
as a frontal system moves in. A moderate- period west swell will
continue through Thursday before a longer period west to northwest
swell arrives on Friday.

Mtr watches warnings advisories
Tday None.

Public forecast: rgass
aviation: W pi
marine: rowe
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 15 mi31 min ESE 1 G 1.9 48°F 61°F1018.8 hPa (-0.4)
AAMC1 - 9414750 - Alameda, CA 33 mi37 min ESE 1.9 G 2.9 51°F 58°F1018.8 hPa
LNDC1 34 mi31 min Calm G 1 51°F 1018.4 hPa (+0.0)
PXSC1 35 mi31 min 53°F 51°F
OBXC1 35 mi31 min 52°F 49°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 35 mi31 min E 1.9 G 2.9 51°F 1018.6 hPa (+0.0)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 35 mi31 min ENE 1.9 G 1.9
PXOC1 - 9414311 - San Francisco (Pier 1), CA 35 mi31 min N 2.9 G 4.1 52°F 1017.5 hPa (+0.0)
FTPC1 - 9414290 - San Francisco, CA 36 mi31 min SW 1 G 1.9 49°F 55°F1018.8 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 36 mi41 min E 9.7 G 12 53°F 56°F9 ft1017.6 hPa (-0.4)
46237 - San Francisco Bar, CA (142) 38 mi61 min 55°F8 ft
46092 - MBM1 40 mi77 min NE 7.8 51°F 55°F1018.3 hPa (+0.0)
46114 - West Monterey Bay, CA 40 mi31 min 56°F10 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 42 mi62 min Calm 49°F 1019 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 42 mi31 min N 5.1 G 6 51°F 1018.8 hPa (-0.3)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 43 mi21 min NE 3.9 G 7.8 53°F 55°F1019 hPa
MLSC1 - Moss Landing, South Harbor, CA 43 mi23 min ESE 2.9 G 8.9 46°F 1018.9 hPa44°F
RCMC1 - 9414863 - Richmond, CA 44 mi31 min 56°F
ELXC1 - Elkhorn Slough Reserve, CA 44 mi106 min SSE 1.9 45°F 1019 hPa44°F

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Carlos Airport, CA16 mi36 minN 010.00 miFair46°F44°F93%1018.6 hPa
Mountain View, Moffett Field, CA16 mi95 minN 010.00 miFair48°F41°F77%1019.3 hPa
Half Moon Bay Airport, CA18 mi36 minN 08.00 miA Few Clouds43°F41°F93%1018.6 hPa
San Jose, San Jose International Airport, CA20 mi38 minN 010.00 miFair46°F42°F86%1018.4 hPa
San Francisco, San Francisco International Airport, CA22 mi35 minSW 49.00 miPartly Cloudy47°F43°F86%1018.1 hPa

Wind History from PAO (wind in knots)
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Last 24hr------------------SE8SE6S5S4SW12SW10
G14
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SW10W11--W11--W5Calm
1 day ago--------------------CalmCalmCalm44N6------N11NW9SW12SW13
G21
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2 days ago------------------3CalmCalmCalmNE4N44N5N8N9N13N10W6--NW6

Tide / Current Tables for Ano Nuevo Island, California
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Ano Nuevo Island
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Thu -- 05:14 AM PDT     0.47 feet Low Tide
Thu -- 07:11 AM PDT     Sunrise
Thu -- 07:55 AM PDT     Moonset
Thu -- 11:16 AM PDT     5.41 feet High Tide
Thu -- 05:34 PM PDT     -0.17 feet Low Tide
Thu -- 07:22 PM PDT     Sunset
Thu -- 08:25 PM PDT     Moonrise
Thu -- 11:54 PM PDT     5.37 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.14.33.21.90.90.50.71.52.63.84.85.45.24.53.21.80.6-0.1-0.10.51.62.94.15.1

Tide / Current Tables for Dumbarton Bridge, San Francisco Bay, California Current
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Dumbarton Bridge
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Thu -- 02:43 AM PDT     -0.00 knots Slack
Thu -- 05:15 AM PDT     -1.54 knots Max Ebb
Thu -- 07:10 AM PDT     Sunrise
Thu -- 07:54 AM PDT     Moonset
Thu -- 08:18 AM PDT     0.00 knots Slack
Thu -- 11:27 AM PDT     2.05 knots Max Flood
Thu -- 02:54 PM PDT     -0.00 knots Slack
Thu -- 05:36 PM PDT     -1.71 knots Max Ebb
Thu -- 07:21 PM PDT     Sunset
Thu -- 08:24 PM PDT     Moonrise
Thu -- 08:47 PM PDT     0.00 knots Slack
Thu -- 11:53 PM PDT     2.02 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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21.50.7-0.3-1.1-1.5-1.4-1-0.30.61.5221.60.9-0.1-1-1.6-1.7-1.3-0.70.21.11.8

Weather Map and Satellite Images
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GOES Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for San Francisco/Monterey Bay Area, CA (7,2,3,4)
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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.