Monday, March25, 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 7:02AMSunset 7:25PM Monday March 25, 2019 5:22 PM PDT (00:22 UTC) Moonrise 11:50PMMoonset 9:21AM Illumination 75% Phase: Waning Gibbous; Moon at 20 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- 214 Pm Pdt Mon Mar 25 2019
.small craft advisory in effect until 9 pm pdt this evening...
Tonight..S winds 10 to 20 kt with gusts up to 30 kt... Becoming southeast 5 to 15 kt after midnight. Wind waves 3 to 4 ft this evening...becoming 2 ft or less. W swell 7 to 8 ft at 13 seconds and S around 1 ft at 17 seconds. Showers likely, mainly this evening.
Tue..S winds 10 to 20 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. W swell 7 to 8 ft at 13 seconds and S around 1 ft at 16 seconds. A slight chance of showers.
Tue night..S winds 15 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 5 to 7 ft at 13 seconds and S around 1 ft at 18 seconds. Showers.
Wed..SW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 5 to 7 ft at 13 seconds and sw around 1 ft at 19 seconds. Showers and a slight chance of Thunderstorms.
Wed night..SW winds 10 to 15 kt. Wind waves 2 ft or less. W swell 8 to 9 ft at 12 seconds and S around 1 ft at 18 seconds. A chance of showers.
Thu..W winds 10 to 15 kt. Wind waves 2 ft or less. W swell around 7 ft at 11 seconds and sw 1 to 2 ft at 17 seconds. A chance of showers.
Thu night..NW winds 5 to 15 kt. Wind waves 2 ft or less. W swell 6 to 7 ft at 15 seconds and S 1 to 2 ft at 17 seconds.
Fri..NW winds 5 to 15 kt. Wind waves 2 ft or less. W swell 3 to 5 ft and S 1 to 2 ft.
Sat..NW winds 5 to 15 kt. Wind waves 2 ft or less. W swell 3 to 5 ft and S around 1 ft. Winds and wind waves higher in and near Thunderstorms.
PZZ500 214 Pm Pdt Mon Mar 25 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Low pressure off the oregon coast will keep light to moderate southerly winds through Tuesday night. Stronger winds can be expected over the central waters this evening and over the northern waters Tuesday night. Winds will switch to southwest on Wednesday and Thursday as high pressure builds off the california coast.


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 260005
afdmtr
area forecast discussion
national weather service san francisco bay area
505 pm pdt Mon mar 25 2019

Synopsis A weak front will pass through the area this evening
with light rain showers. The front will stall over the south bay
and central coast on Tuesday keeping a chance of showers in the
forecast for southern areas. The next front will push into the
area later Tuesday night into early Wednesday with another
organized chance of rain. Shower and isolated thunderstorms will
be possible Wednesday before ending by Thursday. Drying trend
Friday into the weekend.

Discussion As of 1:51 pm pdt Monday... A frontal boundary is
weakening as it passes through the bay area this afternoon and
evening. Showers will continue to impact the afternoon evening
commute but mainly be light to occasionally moderate in intensity.

Shower activity will decrease this evening and overnight. The
surface boundary will wash out over the south bay and central
coast by early Tuesday morning.

As the main upper trough approaches on Tuesday, there may be
sufficient upper lift divergence over the left over surface
boundary to allow for more showers to develop on Tuesday. In
contrast to today the best chances will be from the far east bay
counties through the south bay and around the central coast in the
vicinity of the surface moisture boundary. The NAM model remains
most bullish on generating showers Tuesday while the ECMWF and gfs
are drier.

Rain chances will then increase again later Tuesday night into
weds, especially across the north bay as another surface front
approaches the region. This will lead to increased shower chances
right through weds morning. Enough cold air aloft by weds to allow
thunderstorm chances be put into the forecast (as inherited from
overnight shift).

The parent upper low responsible for all the shower chances the
next few days will finally move onshore late weds night into
Thursday morning. Precip chances should rapidly end by late
Thursday afternoon and evening. For all the talk of showers the
next few days, amounts in general look to be light with some
portions of interior monterey san benito potentially seeing no
rainfall at all. Daytime highs will be on the cool side of normal
with cloud cover and cool temps aloft. However, any peaks of
sunshine will allow temps to jump into the 60s most days.

High pressure to build Friday into the weekend with dry and mild
weather. Storm track remains somewhat active next week but right
now the best precip chances remain north of i-80.

Aviation As of 4:45 pm pdt Monday... For 00z tafs. The passing
cold front is gradually moving south and east across the region
spreading rain to area terminals at the moment. Rain will continue
to slide south this evening with showers lingering through
tonight. Bay area terminals may see rain linger through Tuesday.

Winds will remain light south to southwesterly to calm and
variable overnight. MVFR toVFR CIGS will prevail through much of
the period.

Vicinity of ksfo... MVFR CIGS will prevail with showers gradually
tapering to vicinity showers overnight. Light south to
southwesterly winds will persist through this evening then
becoming light and variable overnight.

Sfo bridge approach... Similar to sfo.

Monterey bay terminals...VFR to MVFR CIGS will prevail with
showers possible overnight as the front slides south. Moderate
and gusty winds will diminish and turn easterly overnight.

Marine As of 2:14 pm pdt Monday... Low pressure off the oregon
coast will keep light to moderate southerly winds through Tuesday
night. Stronger winds can be expected over the central waters this
evening and over the northern waters Tuesday night. Winds will
switch to southwest on Wednesday and Thursday as high pressure
builds off the california coast.

Mtr watches warnings advisories
Tngt Sca... Mry bay until 9 pm
sca... Pt reyes to pigeon pt 0-10 nm until 9 pm
sca... Pigeon pt to pt pinos 0-10 nm until 9 pm
sca... Pt pinos to pt piedras blancas 0-10 nm until 9 pm
sca... Pigeon pt to pt piedras blancas 10-60 nm until 9 pm
sca... Sf bay until 6 pm
public forecast: rww
aviation: cw
marine: W pi
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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 mi34 min 57°F 60°F1018.3 hPa
AAMC1 - 9414750 - Alameda, CA 33 mi40 min 56°F 58°F1018.4 hPa
LNDC1 34 mi34 min 56°F 1017.8 hPa
OBXC1 35 mi34 min 56°F 56°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 35 mi34 min 57°F 1016.7 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 35 mi34 min 56°F 1017.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 35 mi52 min SSW 7 G 9.9
PXSC1 35 mi34 min 58°F 56°F
FTPC1 - 9414290 - San Francisco, CA 36 mi40 min 55°F 56°F1018.2 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 36 mi32 min S 18 G 21 56°F 56°F9 ft1017.4 hPa (-0.9)
46237 - San Francisco Bar, CA (142) 38 mi52 min 55°F8 ft
46092 - MBM1 40 mi68 min S 18 57°F 56°F1017.6 hPa (-2.0)
46114 - West Monterey Bay, CA 40 mi52 min 56°F8 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 42 mi41 min W 1.9 55°F 1018 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 42 mi34 min 58°F 1018.1 hPa
MLSC1 - Moss Landing, South Harbor, CA 43 mi35 min W 16 G 39 1017.6 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 43 mi32 min W 7.8 G 12 55°F 55°F9 ft1018.4 hPa
RCMC1 - 9414863 - Richmond, CA 44 mi40 min 56°F 57°F1017.6 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palo Alto Airport, CA15 mi35 minWSW 910.00 miOvercast63°F48°F60%1017.6 hPa
San Carlos Airport, CA16 mi29 minS 41.25 miLight Rain Fog/Mist57°F55°F94%1017.9 hPa
Mountain View, Moffett Field, CA16 mi86 minS 10 G 1710.00 miOvercast64°F48°F56%1017.9 hPa
Half Moon Bay Airport, CA18 mi27 minS 70.75 miFog/Mist54°F51°F94%1018.6 hPa
San Jose, San Jose International Airport, CA20 mi29 minSSW 12 G 1910.00 miLight Rain64°F50°F60%1017 hPa
San Francisco, San Francisco International Airport, CA22 mi26 minSSW 94.00 miFog/Mist56°F53°F90%1017.8 hPa

Wind History from PAO (wind in knots)
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Tide / Current Tables for Ano Nuevo Island, California
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Ano Nuevo Island
Click for Map
Mon -- 01:49 AM PDT     5.14 feet High Tide
Mon -- 07:05 AM PDT     Sunrise
Mon -- 08:40 AM PDT     -0.05 feet Low Tide
Mon -- 10:21 AM PDT     Moonset
Mon -- 03:17 PM PDT     3.72 feet High Tide
Mon -- 07:25 PM PDT     Sunset
Mon -- 08:38 PM PDT     2.19 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.355.14.842.81.60.60.1-00.41.11.92.73.43.73.73.42.92.52.22.22.53.1

Tide / Current Tables for Dumbarton Bridge, San Francisco Bay, California Current
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Dumbarton Bridge
Click for Map
Mon -- 02:02 AM PDT     1.41 knots Max Flood
Mon -- 05:28 AM PDT     -0.00 knots Slack
Mon -- 07:04 AM PDT     Sunrise
Mon -- 08:19 AM PDT     -1.40 knots Max Ebb
Mon -- 10:19 AM PDT     Moonset
Mon -- 11:48 AM PDT     0.00 knots Slack
Mon -- 03:00 PM PDT     1.54 knots Max Flood
Mon -- 07:03 PM PDT     -0.00 knots Slack
Mon -- 07:24 PM PDT     Sunset
Mon -- 08:56 PM PDT     -0.59 knots Max Ebb
Mon -- 11:39 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.71.21.41.30.90.3-0.4-1-1.4-1.3-1-0.50.10.91.41.51.41.10.60-0.4-0.6-0.5-0.2

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 (20,4,5,8)
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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.