Wednesday, June26, 2019 L-36.com


Marine Weather and Tides
Moss Beach, 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 5:48AMSunset 8:36PM Tuesday June 25, 2019 9:34 PM PDT (04:34 UTC) Moonrise 12:28AMMoonset 12:32PM Illumination 38% Phase: Third Quarter Moon; Moon at 23 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- 844 Pm Pdt Tue Jun 25 2019
.small craft advisory in effect until 4 am pdt Wednesday...
Tonight..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 6 to 7 ft. NW swell 3 to 5 ft at 8 seconds.
Wed..NW winds 10 to 15 kt. Wind waves around 3 ft. NW swell 3 to 4 ft at 9 seconds.
Wed night..NW winds 10 to 15 kt. Wind waves 2 ft or less. NW swell 2 to 3 ft at 11 seconds.
Thu..NW winds 10 to 15 kt. Wind waves 3 to 4 ft. NW swell 2 to 3 ft at 10 seconds.
Thu night..NW winds 15 to 20 kt with gusts up to 25 kt. Wind waves 4 to 5 ft. NW swell 3 to 5 ft at 8 seconds.
Fri..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. NW swell 3 to 5 ft at 8 seconds.
Fri night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. NW swell 3 to 4 ft at 7 seconds.
Sat..NW winds 15 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. NW swell 3 to 4 ft.
Sun..NW winds 15 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. NW swell 3 to 4 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...northwest swell 5 to 7 ft with a dominant period of 10 seconds. Across the bar...northwest seas 6 to 8 ft with a dominant period of 10 seconds. Maximum ebb current of 1.6 kt at 12:25 am Wednesday and 1.3 kt at 12:19 pm Wednesday.
PZZ500 844 Pm Pdt Tue Jun 25 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure off the california coast will shift south tonight and Wednesday as a low pressure system moves into the pacific northwest waters. As a result winds will decrease over the northern waters and increase over the southern waters Wednesday and Thursday. The high will rebuild northward on Friday and the strongest winds will be in the northern waters.


7 Day Forecast for Marine Location Near Moss Beach CDP, 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 252340
afdmtr
area forecast discussion
national weather service san francisco bay area
440 pm pdt Tue jun 25 2019

Synopsis Generally quiet weather is expected for the bay area
over the next several days. Mostly sunny conditions prevail today
as low-level clouds continue to travel southward allowing skies to
clear along the coast, but the stratus can be expected to return
overnight for southern counties. Temperatures continue a cooling
trend today through Thursday. Warmer temperatures can be expected
at the end of the work week and through the weekend; however, they
are still expected to be cooler than seasonal averages.

Discussion As of 1:43 pm pdt Tuesday... An upper level trough
is currently over the north pacific ocean and traveling east
towards the pacific northwest. This passing of the trough to our
north is what is driving the consistent onshore winds as well as
the recent cooling trend. As the trough axis approaches Wednesday,
temperatures in inland areas, particularly interior the north and
east bays could see temperatures drop by as much as 10 degrees.

High temperatures are expected to continue to decrease on Thursday
as well, but not nearly as dramatically.

Breezy northerly winds off the coast have helped mix the marine
layer and leave mostly sunny skies across the area, with a few high
level cirrus clouds moving east. The marine layer is expected to
return overnight; however, it looks as be limited to confine itself
mostly to south of the santa cruz mountains.

Late in the week and into Friday, the upper level trough tries to
lift towards british columbia allowing for high pressure to build
back into the region along with warmer temperatures. The magnitude
of this warming is still uncertain due to model disagreement. The
gfs has the trough lifting out quicker which could mean a much
warmer trend for the bay area; however, the euro shows the upper low
become more stationary and lingers in the pacific northwest, which
could provide cooler conditions.

Aviation As of 4:40 pm pdt Tuesday... Low clouds have cleared
away from the coast this afternoon. Onshore flow is northwesterly
with a fairly robust north-south component. This is evident by a 4
pm METAR report of north winds gusting to 25 kt at sts. This
should be enough to keep stratus out of the sfo bay area tonight.

Stratus should be confined to the coast where ifr CIGS area
expected at mry and sns after 04z.

Vicinity of ksfo... RemainingVFR. W to NW winds increasing 15-18
kt with gusts to 25 kt decreasing after 04z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Ifr after 04z possibly later.

Marine As of 04:28 pm pdt Tuesday... Gusty northwest winds will
gradually diminish over the norther outer waters through tonight.

However, gusty winds will persist along the big sur coast south of
point sur and during the afternoon hours over the coastal gaps and
bays. These winds will generate steep fresh swell resulting in
hazardous conditions over the waters, particularly for smaller
vessels. Expect northwest winds to re-strengthen later this week.

Mtr watches warnings advisories
Tngt Sca... Mry bay until 10 pm
sca... Pigeon pt to pt pinos 0-10 nm until 10 pm
sca... Pt arena to pt reyes 0-10 nm until 4 am
sca... Pt reyes to pigeon pt 0-10 nm until 4 am
sca... Pt arena to pigeon pt 10-60 nm until 4 am
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Sf bay until 9 pm
public forecast: dk
aviation: W pi
marine: rgass
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 18 mi53 min W 9.9 G 12 62°F 76°F1012.9 hPa
46237 - San Francisco Bar, CA (142) 19 mi65 min 60°F5 ft
FTPC1 - 9414290 - San Francisco, CA 21 mi59 min WSW 12 G 18 59°F 59°F1011.8 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 22 mi35 min WNW 18 G 21 57°F 57°F1012.9 hPa (+0.5)
PXSC1 22 mi47 min 60°F 55°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 22 mi47 min WSW 7 G 13 59°F 1010.6 hPa
AAMC1 - 9414750 - Alameda, CA 23 mi59 min W 6 G 12 61°F 69°F1012.3 hPa
OBXC1 23 mi95 min 62°F 55°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 24 mi53 min SW 9.9 G 12
OKXC1 - 9414776 - Oakland (Berth 34), CA 24 mi53 min W 4.1 G 6 62°F 1011.8 hPa
LNDC1 25 mi53 min W 7 G 12 61°F 1011.9 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 27 mi72 min Calm 65°F 1011 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 29 mi47 min SSW 5.1 G 7 64°F 1011.5 hPa
RCMC1 - 9414863 - Richmond, CA 30 mi47 min 65°F
PRYC1 - 9415020 - Point Reyes, CA 40 mi53 min 58°F1012.1 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 41 mi47 min SW 12 G 15 66°F 1010.2 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi53 min W 12 G 16 67°F 69°F1010.2 hPa
UPBC1 43 mi47 min W 16 G 20
PCOC1 - 9415144 - Port Chicago, CA 47 mi53 min WSW 11 G 15 68°F 70°F1010.2 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA3 mi40 minNW 410.00 miMostly Cloudy55°F53°F94%1013.5 hPa
San Francisco, San Francisco International Airport, CA13 mi39 minW 1010.00 miA Few Clouds61°F46°F60%1011.8 hPa
San Carlos Airport, CA16 mi1.8 hrsSW 11 G 1710.00 miA Few Clouds63°F48°F60%1012.2 hPa
Oakland, Metro Oakland International Airport, CA22 mi42 minW 1110.00 miA Few Clouds62°F51°F67%1012.1 hPa
Palo Alto Airport, CA23 mi1.8 hrsWNW 1010.00 miA Few Clouds70°F44°F40%1011.8 hPa

Wind History from SFO (wind in knots)
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Last 24hrNW10NW10NW7W5NW6NW6W7NW6NW7NW7NW8NW9NW11NW11NW12W15W13W17
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1 day agoW12W12W7W7NW9W6W6W4W6CalmCalmNE4N6N6N6NW9NW13NW16NW18NW16NW15NW13NW14W14
2 days agoW9W8W8W11W8W7W8W7W6W6W5CalmN5N5N7NW8NW13W22NW16NW16W21NW19NW15NW12

Tide / Current Tables for Princeton, Half Moon Bay, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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
Wed -- 01:53 AM PDT     Moonrise
Wed -- 02:46 AM PDT     0.00 knots Slack
Wed -- 05:27 AM PDT     0.47 knots Max Flood
Wed -- 05:49 AM PDT     Sunrise
Wed -- 08:24 AM PDT     -0.00 knots Slack
Wed -- 11:12 AM PDT     -0.66 knots Max Ebb
Wed -- 02:21 PM PDT     0.00 knots Slack
Wed -- 02:29 PM PDT     Moonset
Wed -- 05:34 PM PDT     0.70 knots Max Flood
Wed -- 08:35 PM PDT     Sunset
Wed -- 08:50 PM PDT     -0.01 knots Slack
Wed -- 11:57 PM PDT     -0.89 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.7-0.5-0.30.10.30.50.50.40.1-0.2-0.5-0.7-0.6-0.4-0.10.20.50.70.70.60.3-0.1-0.5-0.8

Weather Map and Satellite Images
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wmap_P
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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (0,6,7,8)
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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.