Wednesday, March20, 2019 L-36.com


Marine Weather and Tides
Boulder Creek, 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 7:10AMSunset 7:20PM Wednesday March 20, 2019 6:10 PM PDT (01:10 UTC) Moonrise 6:13PMMoonset 6:19AM 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- 244 Pm Pdt Wed Mar 20 2019
.small craft advisory in effect until 6 pm pdt this evening...
This afternoon..W winds around 10 kt. Wind waves 2 ft or less. W swell 7 to 8 ft at 15 seconds and S 1 to 2 ft at 17 seconds. A chance of showers.
Tonight..SE winds 5 to 10 kt. Wind waves 2 ft or less. W swell 7 to 8 ft at 15 seconds and S 1 to 3 ft at 16 seconds. A slight chance of showers.
Thu..S winds 5 to 10 kt. Wind waves 2 ft or less. W swell 6 to 8 ft at 17 seconds and S 1 to 2 ft at 16 seconds. A slight chance of showers.
Thu night..SW winds up 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..SE winds 10 to 20 kt with gusts up to 25 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..W 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 10 to 20 kt. Wind waves 2 ft or less. W swell 10 to 12 ft and S around 1 ft.
Sun..SW winds up to 10 kt. Wind waves 2 ft or less. W swell 8 to 11 ft and S around 1 ft.
PZZ500 244 Pm Pdt Wed Mar 20 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to moderate west to southwest winds will continue this evening across the coastal waters before winds diminish overnight. Winds will increase and turn southerly again tomorrow night and Friday as the next weather system approaches. Moderate period west swell will continue today and tomorrow before a longer period west to northwest swell arrives on Friday.


7 Day Forecast for Marine Location Near Boulder Creek, CA
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location: 37.13, -122.29     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 210030
afdmtr
area forecast discussion
national weather service san francisco bay area
530 pm pdt Wed mar 20 2019

Synopsis Rain showers will diminish in strength and coverage
through the remainder of the day. Isolated showers may linger
across the central coast tonight into early Thursday morning yet
most locations will remain dry. Another frontal system pushes
across the region on Friday with mainly dry weather expected
Saturday into Sunday. Cool, unsettled weather possible throughout
most of next week.

Discussion As of 02:30 pm pdt Wednesday... A slow moving,
negatively tilted trough approached california from the west last
evening and brought gusty southerly winds before pushing ashore
after midnight. Light to moderate broken rain bands were wrapped
tightly around the core of the upper low as it shifted ashore,
delaying the onset of rain for some in the north bay until the
upper disturbance lifted northward this morning. The majority of
the rain and wind from this storm system has now passed, however,
a second disturbance rounding the broader trough later today
through tonight will allow gradually weakening rain showers to
persist through the next 12 to 18 hours. Latest radar satellite
imagery shows the deepest convection has now shifted farther
inland over the central valley, where lightning pulses have been
observed near los banos, tracy, and stockton.

Scattered to widespread showers through the day added to the
overnight rain totals with the big sur peaks leading the storm
total rainfall accumulations (generally around 1.50-2.00"). Other
higher elevation locations in the north bay (such as venado) and
the santa cruz mountains (such as ben lomond) picked up between
1.00 and 1.50". Elsewhere, lower elevation urban areas reported
lesser amounts between 0.10" on the low end (in rain shadowed
areas) and up to 1.00" on the high end (typically along the coast
or near orographically enhanced areas). Peak gusts ranged from 40
to 50mph out of the south in the windiest locations and occurred
last evening ahead of the cold front. Winds this afternoon have
weakened but remain breezy and primarily out of the west on the
lee of the trough.

Despite the relatively warm start to the day, afternoon
temperatures are 5 to 15 degrees cooler than the same time
yesterday with 2pm temperatures in the mid 50s to low 60s. These
afternoon high temperatures are 4 to 8 degrees below normal
readings for this time of the year. And speaking of this time of
the year... Spring officially begins at 258pm this afternoon!
happy vernal equinox!
a transitory ridge arrives tomorrow which will bring dry weather
conditions and a slight warming trend for the day. Despite this
warming trend, afternoon temps are forecast remain a few degrees
below normal tomorrow.

Another storm system arrives from the gulf of alaska by sunrise
Friday, impacting the north bay first before shifting southward
throughout the day Friday. Precipitation amounts will be highest
over the north bay (around 1.00" over the north bay coastal range,
ie venado, and 1 2-2 3" in the north bay valleys) with progressively
lower accumulations the farther southward inland the system
progresses. A few lingering showers are possible into early
Saturday however most of the weekend will see a general
drying warming trend as another ridge passes overhead.

High pressure redevelops throughout most of the weekend which will
bring generally dry weather conditions and a moderate warming
trend regionwide. Sunday afternoon temperatures rebound to nearly
normal with highs ranging from the low to upper 60s.

A third storm system will impact the region early next week. Mid
to long term models and ensemble members are peppering the Monday
through Thursday period with various amounts of precipitation
though there is little consensus on the coverage or intensity of
this rain. Models do seem to be converging on the Monday morning
timeframe for an initial arrival time of the rains, though they
disagree on the duration or when if there will be breaks in the
rain through Thursday. As it now stands, the data shows a clear
trend towards an extended period of cool, unsettled weather
throughout most of next week.

Aviation As of 4:30 pm pdt Wednesday... Scattered showers
and a few thunderstorms over southern monterey and san benito
counties and in the central valley this afternoon could impact lvk
through 02z. Sct-bkn clouds through this evening with cigs
staying 3500 ft or above. The upper low will move southeast across
the coastal waters later tonight. Rain expected to stay offshore
but CIGS near 3000 ft are possible at mry which will be closest to
the low. Also cannot rule out fog at sts tonight.

Cwsu sfo approach forecast
Vaps this afternoon through the evening
.Confidence: med-high
update. Vaps have occured and are expected to continue through the
evening hours. The area remain conducive for low clds to develop as
moisture and an unstable atmosphere remain inplace. Expect cloud
bases between few-sct 020-030 with CIGS around 050 or higher. Expect
the winds to remain out the wsw for the rest of the afternoon
vicinity of ksfo... Sct clouds at 3000 ft with CIGS 4000-5000 ft.

Clouds will decrease after 04z as we lose the daytime heating but
will increase again early Wednesday morning as the upper low
reaches its closest point to the area. West winds to 15 kt
decreasing after 09z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Clouds over the coastal hills could bring
MVFR conditions to mry after 03z with CIGS around 3000 ft. Better
chance ofVFR at sns with CIGS remaining at or above 5000 ft.

Marine As of 04:21 pm pdt Wednesday... Light to moderate west to
southwest winds will continue this evening across the coastal
waters before winds diminish overnight. Winds will increase and
turn southerly again tomorrow night and Friday as the next weather
system approaches. Moderate period west swell will continue today
and tomorrow before a longer period west to northwest swell
arrives on Friday.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pt reyes 0-10 nm until 6 pm
sca... Pt reyes to pigeon pt 0-10 nm until 6 pm
sca... Pigeon pt to pt pinos 0-10 nm until 6 pm
sca... Pt pinos to pt piedras blancas 0-10 nm until 6 pm
sca... Pt arena to pigeon pt 10-60 nm until 9 pm
sca... Pigeon pt to pt piedras blancas 10-60 nm until 9 pm
sca... Rough bar advisory for sf bar until 9 pm
public forecast: drp
aviation: W pi
marine: as
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46042 - MONTEREY - 27NM West of Monterey Bay, CA 25 mi81 min WSW 5.8 G 7.8 56°F 56°F10 ft1017.3 hPa (-0.0)
RTYC1 - 9414523 - Redwood City, CA 26 mi53 min W 11 G 13 57°F 62°F1017.6 hPa
46114 - West Monterey Bay, CA 28 mi41 min 57°F10 ft
46092 - MBM1 30 mi57 min SW 9.7 56°F 56°F1017.7 hPa (-0.0)
MLSC1 - Moss Landing, South Harbor, CA 35 mi75 min W 8.9 G 24 56°F 1017.9 hPa (-0.5)49°F
ELXC1 - Elkhorn Slough Reserve, CA 36 mi86 min WNW 8 58°F 1018 hPa50°F
46240 - Cabrillo Point, Monterey Bay, CA (158) 40 mi71 min 56°F3 ft
MEYC1 42 mi95 min 56°F1017.5 hPa
AAMC1 - 9414750 - Alameda, CA 44 mi59 min WSW 7 G 9.9 57°F 58°F1017.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 46 mi59 min WNW 7 G 9.9
PXOC1 - 9414311 - San Francisco (Pier 1), CA 46 mi53 min W 7 G 9.9 57°F 1016.2 hPa
LNDC1 46 mi53 min W 8 G 11 57°F 1017.1 hPa
OBXC1 47 mi53 min 56°F 48°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 47 mi53 min WNW 8.9 G 12 55°F 1017.2 hPa
PXSC1 47 mi59 min 56°F 46°F
FTPC1 - 9414290 - San Francisco, CA 48 mi59 min WNW 4.1 G 11 56°F 56°F1017.5 hPa
46237 - San Francisco Bar, CA (142) 49 mi71 min 55°F9 ft

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mountain View, Moffett Field, CA24 mi15 minW 12 G 1810.00 miPartly Cloudy60°F37°F44%1017.2 hPa

Wind History from NUQ (wind in knots)
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1 day agoW5NW5N6N5NW5N6NW3CalmCalmCalmSW3CalmCalmCalmSE4SE3NE4E55SE4N7N9N8NW3
2 days agoNW6N3NW4CalmS3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN3CalmN4NE35N9N10N11NW7

Tide / Current Tables for Ano Nuevo Island, California
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Ano Nuevo Island
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Wed -- 04:25 AM PDT     0.94 feet Low Tide
Wed -- 07:13 AM PDT     Sunrise
Wed -- 07:18 AM PDT     Moonset
Wed -- 10:23 AM PDT     5.62 feet High Tide
Wed -- 04:52 PM PDT     -0.57 feet Low Tide
Wed -- 06:43 PM PDT     Full Moon
Wed -- 07:13 PM PDT     Moonrise
Wed -- 07:21 PM PDT     Sunset
Wed -- 11:18 PM PDT     5.22 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.53.62.41.5111.72.83.955.65.54.83.520.6-0.3-0.6-0.10.92.13.54.65.2

Tide / Current Tables for Santa Cruz, California
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Santa Cruz
Click for Map
Wed -- 04:22 AM PDT     0.91 feet Low Tide
Wed -- 07:11 AM PDT     Sunrise
Wed -- 07:17 AM PDT     Moonset
Wed -- 10:35 AM PDT     5.52 feet High Tide
Wed -- 04:50 PM PDT     -0.66 feet Low Tide
Wed -- 06:43 PM PDT     Full Moon
Wed -- 07:12 PM PDT     Moonrise
Wed -- 07:19 PM PDT     Sunset
Wed -- 11:34 PM PDT     5.02 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.53.62.51.5111.72.63.84.85.45.54.83.520.5-0.4-0.7-0.20.71.93.14.24.9

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 (21,6,7,8)
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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.