Thursday, July18, 2019 L-36.com


Marine Weather and Tides
Roseland, 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 6:00AMSunset 8:34PM Thursday July 18, 2019 10:07 AM PDT (17:07 UTC) Moonrise 9:02PMMoonset 6:35AM Illumination 97% Phase: Waning Gibbous; Moon at 16 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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PZZ540 Coastal Waters From Point Arena To Point Reyes California Out To 10 Nm- 844 Am Pdt Thu Jul 18 2019
.small craft advisory in effect until 3 pm pdt this afternoon...
Today..NW winds 15 to 20 kt with gusts up to 25 kt. Wind waves 4 to 5 ft. SWell S around 3 ft.
Tonight..W winds 15 to 20 kt with gusts up to 25 kt. Wind waves around 3 ft.
Fri..S winds 10 to 15 kt. Wind waves around 3 ft. Patchy fog.
Fri night..S winds 5 to 10 kt. Wind waves 2 ft or less. Patchy fog.
Sat..S winds 5 to 10 kt. Wind waves around 3 ft.
Sat night..NW winds 5 to 10 kt. Wind waves 2 ft or less.
Sun..NW winds 10 to 15 kt. Wind waves around 3 ft.
Mon..NW winds 10 to 15 kt. Wind waves 3 to 4 ft.
PZZ500 844 Am Pdt Thu Jul 18 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light to moderate northwest winds will persist through Monday with locally gusty winds over the northern outer waters. Lighter southerly flow can be expected along the coast today and into the start of the weekend. The sea state will continue to be dominated by short period wind generated waves along with a light long period southerly swell.


7 Day Forecast for Marine Location Near Roseland, CA
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location: 38.43, -122.71     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 181547
afdmtr
area forecast discussion
national weather service san francisco bay area
847 am pdt Thu jul 18 2019

Synopsis A gradual cooling trend will continue through late week
with periods of night and morning low clouds. Temperatures will
begin to warm slightly this weekend and rebound back to near
seasonal averages by next week.

Discussion As of 08:44 am pdt Thursday... Stratus that spread
well inland during the overnight hours continues to rapidly
diminish across inland valleys at this hour. Look for mostly sunny
conditions to develop for just about all inland areas by late
morning or early afternoon while low clouds may linger at times
near the coast. As mentioned in the previous discussion, expecting
the cooling trend to continue across the interior portion of the
region today with little change for coastal areas. The ongoing
forecast remains on track with no updates needed at this time. For
additional details, please see the previous forecast discussion
below.

Prev discussion As of 2:43 am pdt Thursday... The marine layer has
ramped up to around 1800 feet, per the fort ord profiler.

Satellite imagery shows low clouds extending through the salinas
valley, however, high clouds are obscuring the view of low clouds
below over the greater san francisco bay area. Surface
observations at bay area airports are not indicating any ceilings
at this time, however, expect low cloud coverage to increase by
sunrise.

The broad upper level trough remains along the west coast. This
will maintain the cooling trend that has already begun. Highs
today are forecast to be several degrees cooler than those on
Wednesday across inland areas, with little change along the coast.

Night and morning clouds will continue over the next few days
with onshore flow with continued cooling through Saturday.

Slightly warmer temperatures are expected on Sunday with high
pressure aloft building in from the east. This ridge is forecast
to build over the four corners region and nudge westward early
in the week. However, a deepening trough off the west coast will
keep the ridge from building too far west. Warmer temperatures are
still indicated for the inland areas, but near-coastal sites
should remain near normal.

Aviation As of 4:50 am pdt Thursday... Weak southerly flow is
keeping stratus north of the sfo and oak airports. Lower CIGS in
the mry bay area with occasional vsbys down to 3-5 miles through
18z.

Boundary layer winds on the WRF model and on the NAM 925 mb and
850 mb wind fields indicate a weak cyclonic circulation will drift
southwestward to the coastal waters west of the north bay
setting up a more robust onshore flow for today. This could bring
gusts up to 20-25 kt around sfo this afternoon.

Vicinity of ksfo...VFR. West winds gusting to 25 knots after 21z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Ifr CIGS with occasional vsbys down to
3-5 miles. Clearing after 18z. Southerly flow along the coast will
curve around mry bay to produce afternoon wind gusts to 20 kts in
the salinas valley. CIGS will enter sns early tonight then spread
into mry.

Marine As of 08:44 am pdt Thursday... Generally light to
moderate northwest winds will persist through Monday with locally
gusty winds over the northern outer waters. Lighter southerly flow
can be expected along the coast today and into the start of the
weekend. The sea state will continue to be dominated by short
period wind generated waves along with a light long period
southerly swell.

Mtr watches warnings advisories
Tday Sca... Pt arena to pigeon pt 10-60 nm
sca... Pt arena to pt reyes 0-10 nm until 3 pm
sca... Sf bay from 9 am
public forecast: rgass sims
aviation: W pi
marine: as
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PRYC1 - 9415020 - Point Reyes, CA 33 mi68 min 54°F1013.9 hPa (+0.7)
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 34 mi38 min N 5.8 G 7.8 50°F1013.7 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 35 mi68 min SW 14 G 18 60°F 1012.9 hPa (+1.0)
RCMC1 - 9414863 - Richmond, CA 38 mi68 min 63°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 40 mi51 min S 14 57°F 1014 hPa
SFXC1 - San Francisco Bay Reserve, CA 40 mi83 min WNW 11 63°F 1013 hPa57°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 41 mi68 min SW 14 G 18 58°F 1014 hPa (+0.9)
UPBC1 41 mi68 min WNW 11 G 13
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi68 min WNW 11 G 12 63°F 69°F1012.9 hPa (+0.9)
PCOC1 - 9415144 - Port Chicago, CA 44 mi68 min W 14 G 17 63°F 70°F1012.8 hPa (+0.9)
FTPC1 - 9414290 - San Francisco, CA 45 mi74 min WSW 6 G 11 56°F 60°F1014.4 hPa
46237 - San Francisco Bar, CA (142) 45 mi68 min 57°F5 ft
OKXC1 - 9414776 - Oakland (Berth 34), CA 47 mi68 min WSW 8 G 11 61°F 1014 hPa (+0.9)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 47 mi38 min SSW 3.9 G 5.8 55°F 54°F1015 hPa
OBXC1 47 mi74 min 60°F 58°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 47 mi68 min SE 1.9 G 2.9 61°F 1013 hPa (+0.8)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 48 mi68 min WSW 13 G 15
LNDC1 49 mi68 min W 4.1 G 6 60°F 1014 hPa (+0.9)

Wind History for Point Reyes, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa, Santa Rosa Sonoma County Airport, CA8 mi75 minN 010.00 miPartly Cloudy62°F55°F78%1012.7 hPa
Petaluma Municipal Airport, CA13 mi73 minN 09.00 miFair63°F59°F88%1013.5 hPa
Novato / Gnoss Field, CA21 mi73 minN 010.00 miFair66°F57°F73%1013.5 hPa

Wind History from STS (wind in knots)
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Last 24hrCalm54S9S11S10S10S9SE10S8S4S3SW3CalmCalmCalmS5CalmS3S3S3CalmCalmS4
1 day agoS65NW7
G15
N12NW12N11N14NW7NW9NW9S9S7S5CalmS3S3CalmCalmCalmCalmCalmCalmSE4S4
2 days agoS5S7S7S105
G14
S9W12N11NW11
G16
N12NW10
G19
S4S5S6S4S5S3CalmCalmCalmS3S33S4

Tide / Current Tables for Upper drawbridge, Petaluma River, San Pablo Bay, California
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Upper drawbridge
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Thu -- 02:39 AM PDT     7.02 feet High Tide
Thu -- 06:01 AM PDT     Sunrise
Thu -- 07:35 AM PDT     Moonset
Thu -- 10:28 AM PDT     -0.46 feet Low Tide
Thu -- 04:48 PM PDT     5.62 feet High Tide
Thu -- 08:31 PM PDT     Sunset
Thu -- 10:00 PM PDT     Moonrise
Thu -- 10:26 PM PDT     2.36 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.35.76.876.55.64.22.61.20.1-0.4-0.30.41.73.14.55.45.65.24.53.62.82.42.5

Tide / Current Tables for Lakeville, Petaluma River, San Pablo Bay, California
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Lakeville
Click for Map
Thu -- 02:28 AM PDT     6.71 feet High Tide
Thu -- 06:01 AM PDT     Sunrise
Thu -- 07:35 AM PDT     Moonset
Thu -- 10:08 AM PDT     -0.46 feet Low Tide
Thu -- 04:37 PM PDT     5.38 feet High Tide
Thu -- 08:31 PM PDT     Sunset
Thu -- 10:00 PM PDT     Moonrise
Thu -- 10:06 PM PDT     2.36 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.55.86.66.66.153.62.10.8-0.1-0.5-0.20.723.34.55.35.34.94.13.32.62.42.7

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 (13,3,4,5)
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Ground Weather Radar Station Sacramento, 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.