Tuesday, April23, 2019 L-36.com


Marine Weather and Tides
Roseland, 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 6:22AMSunset 7:56PM Tuesday April 23, 2019 3:52 AM PDT (10:52 UTC) Moonrise 11:38PMMoonset 8:38AM Illumination 84% Phase: Waning Gibbous; Moon at 19 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- 232 Am Pdt Tue Apr 23 2019
.small craft advisory in effect through Wednesday evening...
Today..NW winds 10 to 20 kt...increasing to 15 to 25 kt this afternoon. Wind waves 5 to 6 ft. NW swell 3 to 5 ft at 9 seconds.
Tonight..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 5 to 6 ft. NW swell 4 to 6 ft at 9 seconds.
Wed..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 6 to 7 ft. NW swell 5 to 6 ft at 12 seconds.
Wed night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 5 to 6 ft. NW swell 5 to 7 ft at 11 seconds.
Thu..NW winds 10 to 20 kt. Wind waves around 3 ft. NW swell 3 to 5 ft at 11 seconds.
Thu night..NW winds 5 to 15 kt. Wind waves around 3 ft. NW swell around 4 ft at 11 seconds.
Fri..NW winds 5 to 15 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft.
Sat..NW winds 5 to 15 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft.
PZZ500 232 Am Pdt Tue Apr 23 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 north. Winds and seas over the northern waters will remain moderate through Wednesday night while lighter winds and seas are expected in the central and southern waters.


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 231032
afdmtr
area forecast discussion
national weather service san francisco bay area
332 am pdt Tue apr 23 2019

Synopsis Continued warm and dry today with high pressure and
offshore winds in place. A few degrees of cooling possible by
Wednesday but no big changes in the weather pattern. Onshore
winds return by late in the week and into the weekend with
temperatures gradually returning to seasonal norms.

Discussion As of 3:32 am pdt Tuesday... Satellite shows some
high clouds continuing to spin over the region in anti-cyclonic
flow aloft as a result of upper level high pressure. Right now
half moon bay is the only airport reporting some type of clouds
and reduced vsby with 5 miles and mist with an overcast 300 foot
cloud deck. Main story for today will be another warm day across
the bay area. Expect widespread readings in the 80s with even some
lower 90s. Closer to the coast and bays comfy 70s will prevail.

At this time it appears we'll stay a few degrees below record
levels. The northerly gradient is slowly easing down to 7 mb and
the decreasing northerly offshore strength will make it hard to
get temps to warm into record territory along with the thin cloud
deck. Anyway, its splitting hairs and those that have been longing
for some warm temperatures will enjoy the heat.

Day to day changes will be subtle away from the coast with only a
few degrees of cooling expected for weds. This will be due to
offshore winds ending and a more pronounced seabreeze by weds
afternoon near the coast. The amplified upper pattern and thermal
trough along the coast at the surface can sometimes lead to
southerly wind reversals along the central coast. The 00z nam
showed some signs of this around pt conception by weds night but
has since delayed that to Thursday. At this time it appears more
likely that returning northwest winds over the ocean (sst 49-52)
will allow the marine layer to re-establish by Thursday
afternoon evening as the inversion layer deepens with
strengthening onshore winds near the coast and bays. This is when
more noted cooling should occur near the coast and then eventually
spread inland later in the week and into the weekend.

Right now the models show a weak upper low approaching southern
california by Sunday. Some model simulations suggest a slight
chance of showers over the central coast but more likely impacting
slo and santa barbara counties. Nonetheless those with outdoor
interests along the big sur coast on Sunday will want to follow
the forecast trends for clouds, wind impacts and any possible
precip chances.

Long range looks dry and seasonable to start next week.

Aviation As of 10:45 pm pdt Monday... For 06z tafs.VFR
conditions and clear skies continue to prevail across the region,
along with light winds. The kacv to ksfo pressure gradient is now
up at a pretty strong 8.5 mb. Consistent with this, latest model
output and statistical guidance indicate more minimal coastal
stratus development than earlier runs, with even much of the coast
itself likely to stay mostly clear. Therefore continue to expect
the san francisco bay area terminals to remainVFR through the
night and on Tuesday and now the monterey bay terminals as well.

Vicinity of ksfo...VFR conditions are forecast to prevail through
the night and on Tuesday. Light winds until the seabreeze return
Tuesday afternoon.

Sfo bridge approach... Same as ksfo.

Monterey bay terminals...VFR conditions are now considered likely
to prevail through the night and on Tuesday, though can't
completely rule out possibility of brief ceiling development
around sunrise. Light generally offshore winds, turning onshore
early Tuesday afternoon.

Marine As of 03:02 am pdt Tuesday... High pressure off the
california coast will shift north. Winds and seas over the
northern waters will remain moderate through Wednesday night
while lighter winds and seas are expected in the central and
southern waters.

Mtr watches warnings advisories
Tday Sca... Pt arena to pt reyes 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm until 8 am
public forecast: rww
aviation: W pi
marine: W pi
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PRYC1 - 9415020 - Point Reyes, CA 33 mi53 min 51°F1015.6 hPa (-0.8)
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 34 mi43 min NW 18 G 21 49°F1015.8 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 35 mi53 min SE 1 G 1 61°F 1015.1 hPa (-0.6)
RCMC1 - 9414863 - Richmond, CA 38 mi53 min SSE 2.9 G 4.1 59°F 58°F1015.2 hPa (-0.8)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 40 mi54 min Calm 58°F 1015 hPa
SFXC1 - San Francisco Bay Reserve, CA 40 mi68 min SSE 7 60°F 1015 hPa54°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 41 mi53 min 58°F 1015.8 hPa (-0.7)
UPBC1 41 mi53 min W 6 G 7
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi53 min SSW 5.1 G 6 62°F 62°F1015.3 hPa (-0.5)55°F
PCOC1 - 9415144 - Port Chicago, CA 44 mi53 min SSW 5.1 G 8.9 60°F 62°F1015.3 hPa (-0.4)
FTPC1 - 9414290 - San Francisco, CA 45 mi53 min SW 1.9 G 4.1 53°F 53°F1015.8 hPa (-0.8)
46237 - San Francisco Bar, CA (142) 45 mi53 min 54°F4 ft
PXSC1 46 mi53 min 58°F 53°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 47 mi53 min NNW 1 G 1.9 58°F 1015.5 hPa (-0.8)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 47 mi43 min NW 5.8 G 7.8 51°F 50°F1016.1 hPa
OBXC1 47 mi53 min 58°F 54°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 47 mi53 min ESE 1.9 G 2.9 58°F 1014.5 hPa (-0.8)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 48 mi53 min NNE 2.9 G 4.1
LNDC1 49 mi53 min N 1.9 G 4.1 59°F 1015.4 hPa (-0.8)

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 mi60 minN 010.00 miFair58°F50°F75%1014.9 hPa
Petaluma Municipal Airport, CA13 mi58 minN 010.00 miFair52°F51°F100%1015.9 hPa
Novato / Gnoss Field, CA21 mi78 minNE 410.00 miFair55°F51°F88%1015.9 hPa

Wind History from STS (wind in knots)
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Last 24hrN3N4NW5N9N9N10N7N6N6NW5SW4W5N3S8S8S6S5SE4CalmCalmN5W3NW3Calm
1 day agoN7N6NW4CalmW3N9N7NW5SW4W56W5SW9SW7SW6SE8S3S3S3SW3CalmW3CalmW4
2 days agoSE3SW3SE3CalmCalmNW6N11N12
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Tide / Current Tables for Upper drawbridge, Petaluma River, San Pablo Bay, California
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Upper drawbridge
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Tue -- 04:38 AM PDT     6.58 feet High Tide
Tue -- 06:24 AM PDT     Sunrise
Tue -- 09:38 AM PDT     Moonset
Tue -- 12:23 PM PDT     -0.46 feet Low Tide
Tue -- 06:46 PM PDT     5.09 feet High Tide
Tue -- 07:54 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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22.845.46.46.56.15.23.82.410-0.4-0.30.51.734.14.95.14.84.13.32.6

Tide / Current Tables for Lakeville, Petaluma River, San Pablo Bay, California
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Lakeville
Click for Map
Tue -- 04:27 AM PDT     6.30 feet High Tide
Tue -- 06:23 AM PDT     Sunrise
Tue -- 09:38 AM PDT     Moonset
Tue -- 12:03 PM PDT     -0.46 feet Low Tide
Tue -- 06:35 PM PDT     4.87 feet High Tide
Tue -- 07:53 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.134.25.46.26.25.74.73.31.90.6-0.2-0.5-0.10.71.93.14.24.84.84.43.832.5

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 (6,6,7,8)
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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.