Thursday, June20, 2019 L-36.com


Marine Weather and Tides
Montara, CA

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6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 5:47AMSunset 8:36PM Thursday June 20, 2019 5:04 PM PDT (00:04 UTC) Moonrise 10:25PMMoonset 7:49AM Illumination 88% Phase: Waning Gibbous; Moon at 18 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 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 223 Pm Pdt Thu Jun 20 2019
.small craft advisory in effect from Friday afternoon through Friday evening...
Tonight..NW winds 15 to 20 kt with gusts up to 25 kt...becoming W 10 to 15 kt after midnight. Wind waves 3 to 4 ft. NW swell 6 to 8 ft at 11 seconds...building to 8 to 10 ft at 10 seconds after midnight.
Fri..W winds 15 to 25 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. NW swell 8 to 10 ft at 11 seconds.
Fri night..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. NW swell 6 to 8 ft at 11 seconds.
Sat..W winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 5 to 7 ft at 10 seconds.
Sat night..W winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 5 to 7 ft at 10 seconds.
Sun..SW winds 5 to 10 kt. Wind waves 2 ft or less. NW swell 6 to 8 ft at 10 seconds.
Sun night..W winds 5 to 10 kt. Wind waves 2 ft or less. NW swell 6 to 8 ft at 10 seconds.
Mon..NW winds 15 to 20 kt. Wind waves around 3 ft. NW swell 5 to 7 ft.
Tue..NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 5 to 7 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 5 to 7 ft with a dominant swell period of 10 seconds...building to 7 to 9 feet at 10 seconds after midnight. Across the bar...combined seas 6 to 8 ft with a dominant swell period of 10 seconds...building to 8 to 10 feet with a swell period of 10 seconds after midnight. Maximum ebb current of 1.4 kt at 08:13 pm Thursday and 2.7 kt at 07:25 am Friday.
PZZ500 223 Pm Pdt Thu Jun 20 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light southerly winds will gradually veer to the northwest by late afternoon. Strong gale force winds will continue across the northern outer waters. Stronger winds are forecast across all coastal waters this evening into Friday. These winds will result in steep fresh swell creating hazardous seas conditions, especially for smaller vessels.


7 Day Forecast for Marine Location Near Montara, CA
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location: 37.57, -122.58     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 202100
afdmtr
area forecast discussion
national weather service san francisco bay area
200 pm pdt Thu jun 20 2019

Synopsis After a relatively cooler day today, offshore winds
will develop late tonight and during the day on Friday, bringing a
gradual warming trend to the region that will last through the
weekend. Gusty north to northeast winds are possible across the
north bay hills tonight and again tomorrow night. Cooler
conditions will return for the work week.

Discussion As of 2:00 pm pdt Thursday... Water vapor imagery
continues to show a trough of low pressure digging south across
the intermountain west and great basin this afternoon. Northern
california really remains on the dry side of the system, but
cooler conditions are prevailing across the region today. At this
time, more places are running 3 to 8 degrees cooler, with areas
trapped beneath the stratus are seeing the greatest cooling, such
as monterey and watsonville. This will make for a very pleasant
evening and a cool overnight conditions. Believe the immediate
coastal areas could see some drizzle again tonight, especially in
the vicinity of the monterey bay. Otherwise, the main story for
the night will be the developing offshore gradient across the
north bay hills. Models are showing that the 925 and 850 mb winds
ranging between 20 and 30 knots. At this time, think the ridge
tops could see some gusty conditions, but these gusty conditions
will remain below advisory criteria and be limited to the higher
elevations of napa, sonoma, and marin counties.

As high pressure will slowly begin to build back over the region
on Friday and for the weekend. As a result, a gradual warming
trend will develop across the region. Although the northerly winds
will weaken a bit for Friday, gusty winds will redevelop for
Friday night. Another trough will then dig along the pacific
northwest for the first part of next week, and remain in place
through at least the middle of next week. This will bring the
return of a deeper marine layer and cooler temperatures once
again. Palmer

Aviation As of 10:30 am pdt Thursday... For 18z tafs. Clearing
is occuring across all bay area terminals. Low clouds persist over
kmry and ksns with clearing expected by 19z-20z this afternoon.

Light winds will continue through the morning with winds
strengthening in the afternoon with the onset of the seabreeze.

Vicinity of ksfo...VFR. Light to locally moderate winds will
continue through the morning with winds strengthening to around 15
to 20 kt with gusts to 25 kt in the afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR CIGS will prevail until 19z-20z
this afternoon. Light winds will continue through the morning
with winds strengthening in the afternoon with the onset of the
seabreeze.

Marine As of 8:34 am pdt Thursday... Light southerly winds will
persist along the coast south of point reyes through midday today
then gradually veer to the northwest in the late afternoon.

Strong gale force winds across the northern outer waters are
forecast to spread farther south late this afternoon prompting
gale warnings over the outer waters to expand in coverage.

Stronger winds are forecast across all coastal waters this evening
into Friday. These winds will result in steep fresh swell
creating hazardous seas conditions, especially for smaller
vessels.

Mtr watches warnings advisories
Tngt Glw... Pt arena to pigeon pt 10-60 nm
sca... Pt arena to pt reyes 0-10 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Sf bay until 9 pm
public forecast: palmer
aviation: sims
marine: sims
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46237 - San Francisco Bar, CA (142) 15 mi34 min 58°F5 ft
FTPC1 - 9414290 - San Francisco, CA 17 mi52 min W 13 G 19 57°F 59°F1012.3 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 19 mi24 min W 3.9 G 5.8 56°F 58°F1013.3 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 19 mi46 min WSW 13 G 18 60°F 1011.2 hPa
PXSC1 19 mi52 min 62°F 54°F
AAMC1 - 9414750 - Alameda, CA 20 mi52 min W 11 G 14 62°F 67°F1012.5 hPa
RTYC1 - 9414523 - Redwood City, CA 20 mi46 min WNW 9.9 G 13 69°F 75°F1011.4 hPa
OBXC1 21 mi46 min 60°F 56°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 21 mi46 min W 13 G 15 60°F 1012.1 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 21 mi46 min WSW 15 G 19
LNDC1 22 mi46 min W 9.9 G 15 62°F 1012.1 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 23 mi35 min SW 16 59°F 1012 hPa
RCMC1 - 9414863 - Richmond, CA 26 mi52 min SW 7 G 12 60°F 64°F1011.8 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 26 mi46 min SW 18 G 21 59°F 1012 hPa
PRYC1 - 9415020 - Point Reyes, CA 36 mi46 min 58°F1012.4 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 38 mi46 min SW 18 G 22 63°F 1010.5 hPa
UPBC1 40 mi46 min WSW 18 G 23
MZXC1 - 9415102 - Martinez-Amorco CA 40 mi46 min SW 13 G 20
PCOC1 - 9415144 - Port Chicago, CA 44 mi46 min WSW 12 G 18 71°F 68°F1010.1 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 49 mi46 min WNW 13 G 18

Wind History for San Francisco, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA6 mi64 minSSW 85.00 miPartly Cloudy with Haze59°F53°F82%1013.9 hPa
San Francisco, San Francisco International Airport, CA12 mi68 minW 10 G 1610.00 miA Few Clouds74°F52°F46%1011.3 hPa
San Carlos Airport, CA18 mi77 minW 1010.00 miClear73°F55°F53%1011.2 hPa
Oakland, Metro Oakland International Airport, CA21 mi71 minNW 139.00 miA Few Clouds69°F55°F61%1011.6 hPa

Wind History from HAF (wind in knots)
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Last 24hrS7SW5S5S5S8S6S7S10S9S10S11S11S10S7S9S8S9S8S8SE5S7S9S9S8
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Tide / Current Tables for Half Moon Bay, California
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Half Moon Bay
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Thu -- 12:19 AM PDT     5.40 feet High Tide
Thu -- 05:48 AM PDT     Sunrise
Thu -- 07:30 AM PDT     -0.74 feet Low Tide
Thu -- 08:48 AM PDT     Moonset
Thu -- 02:47 PM PDT     4.36 feet High Tide
Thu -- 07:38 PM PDT     3.08 feet Low Tide
Thu -- 08:34 PM PDT     Sunset
Thu -- 11:24 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.45.34.73.62.30.9-0.1-0.7-0.7-0.20.71.72.83.64.24.34.23.83.43.13.13.43.84.4

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
Click for Map
Thu -- 02:14 AM PDT     -0.00 knots Slack
Thu -- 05:31 AM PDT     -1.86 knots Max Ebb
Thu -- 05:48 AM PDT     Sunrise
Thu -- 08:48 AM PDT     Moonset
Thu -- 09:13 AM PDT     0.01 knots Slack
Thu -- 12:18 PM PDT     1.39 knots Max Flood
Thu -- 04:09 PM PDT     -0.00 knots Slack
Thu -- 06:09 PM PDT     -0.80 knots Max Ebb
Thu -- 08:35 PM PDT     Sunset
Thu -- 09:08 PM PDT     0.00 knots Slack
Thu -- 11:24 PM PDT     Moonrise
Thu -- 11:51 PM PDT     0.82 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.60.1-0.5-1.3-1.8-1.8-1.4-0.9-0.20.61.11.41.31.10.70.1-0.5-0.8-0.7-0.4-0.10.40.7

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.