Saturday, April21, 2018 L-36.com


Marine Weather and Tides
Roseland, CA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.

Sunrise 6:23AMSunset 7:55PM Saturday April 21, 2018 8:39 AM PDT (15:39 UTC) Moonrise 10:14AMMoonset 12:06AM Illumination 37% Phase: Waxing Crescent; Moon at 6 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 Point Arena To Point Reyes To 10 Nm- 222 Am Pdt Sat Apr 21 2018
.small craft advisory in effect through Sunday evening...
Today..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 5 to 6 ft at 15 seconds.
Tonight..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 5 to 7 ft at 14 seconds.
Sun..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. Mixed swell nw 4 to 6 ft at 14 seconds and S 3 ft at 16 seconds.
Sun night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 6 to 8 ft at 13 seconds.
Mon..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 6 ft at 12 seconds.
Tue..NW winds 10 kt. Wind waves 2 ft or less. NW swell 5 to 7 ft.
Wed..S winds 10 kt. Wind waves 2 ft or less. W swell 5 to 7 ft.
PZZ500 222 Am Pdt Sat Apr 21 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Continued breezy northwest winds are expected over the coastal waters this weekend as high pressure remains over the eastern pacific. Steep wind waves and fresh swell will result in hazardous seas likely over the weekend and possibly into early next week.

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 211527
afdmtr
area forecast discussion
national weather service san francisco bay area
827 am pdt Sat apr 21 2018

Synopsis A warming trend and dry weather are forecast through
the weekend. Cooler temperatures are expected next week as a low
pressure system develops over the eastern pacific.

Discussion As of 08:27 am pdt Saturday... For much of the bay
area this morning clear skies prevail. The big exception is
monterey bay and the salinas valley. A marine stratus layer
developed overnight and moved up the salinas valley. The ft ord
profiler puts the marine layer depth at about 1500 feet, but
metars at kmry ksns show lower cloud decks at 300-400 feet. Latest
hi-res models keep the low clouds through mid morning before
eroding back to the coastal waters. Did a quick update to the
forecast to better reflect latest trends from satellite.

Otherwise, pleasant weather expected around the bay area today
with above normal temperatures.

Prev discussion As of 3:20 am pdt Saturday... Satellite imagery
shows a patch of coastal stratus covering the monterey bay and
extending partially into the salinas valley. Current temperatures
are running warmer than last night's and are in the lower 50s for
the most part. Weak high pressure building over the state today
will bring warmer temperatures to the area today. Highs today are
forecast to be in the 60s to lower 70s at the coast and the upper
70s to mid 80s inland.

A weak upper trough is progged to brush across northern california
on Sunday which will bring a little cooling to the area. Mild
temperatures will continue through about midweek with highs
generally in the 60s coast to lower 80s inland.

Medium range models continue to indicate a cut-off low forming
over the eastern pacific by midweek. This low is not expected to
bring rain to the area, but will likely bring cooler weather and
possibly more low clouds. Confidence remains low, however, given
the uncertain nature of cut-off lows.

Aviation As of 4:27 am pdt Saturday for 12z tafs. Infrared
satellite imagery shows some areas of stratus situated over the
monterey bay and the salinas valley. Outside these locations,
skies remain mostly clear to clear withVFR conditions expected to
prevail. Onshore winds will increase by the afternoon to around
10 to 20 kt.

Vicinity of ksfo...VFR conditions expected to prevail. Light winds
in the morning will increase through the day to around 20 kt in
the afternoon (with higher speeds quite possible, like yesterday).

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Ifr and even lifr ceilings have been
reported as low clouds swirl over the monterey bay, impacting kmry
and ksns. At this time think the stratus will mix out sometime
around mid-morning with a return toVFR conditions. Clouds may
again impact the terminals sometime in the evening overnight hours
heading into early Sunday.

Marine As of 2:22 am pdt Saturday... Continued breezy northwest
winds are expected over the coastal waters this weekend as high
pressure remains over the eastern pacific. Steep wind waves and
fresh swell will result in hazardous seas likely over the weekend
and possibly into early next week.

Mtr watches warnings advisories
Tday Sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 0-10 nm
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
sca... Pt pinos to pt piedras blancas 0-10 nm
public forecast: mm sims
aviation: rowe
marine: rowe
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PRYC1 - 9415020 - Point Reyes, CA 33 mi51 min WNW 11 G 14 51°F1020.2 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 34 mi39 min NNW 18 G 23 52°F 50°F1021 hPa (+0.6)47°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 35 mi51 min WSW 4.1 G 6 55°F 1020.4 hPa
RCMC1 - 9414863 - Richmond, CA 38 mi51 min NNW 1 G 2.9
SFXC1 - San Francisco Bay Reserve, CA 40 mi114 min Calm 48°F 1020 hPa46°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 40 mi58 min Calm 55°F 1021 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 41 mi51 min S 1.9 G 2.9 55°F 1021.1 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi51 min WNW 7 G 8 54°F 59°F1020.7 hPa54°F
PCOC1 - 9415144 - Port Chicago, CA 44 mi51 min SW 6 G 8 54°F 59°F1020.5 hPa
46237 - San Francisco Bar, CA (142) 45 mi69 min 53°F7 ft
FTPC1 - 9414290 - San Francisco, CA 45 mi51 min Calm G 1
PXSC1 46 mi81 min 55°F 49°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 47 mi51 min ESE 4.1 G 5.1 53°F 1019.7 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 47 mi51 min SE 2.9 G 5.1 53°F 1020.8 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 47 mi49 min NNW 12 G 14 51°F 51°F8 ft1020.5 hPa (+0.3)
OBXC1 47 mi51 min 53°F 50°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 48 mi51 min ESE 2.9 G 5.1
LNDC1 49 mi51 min SE 6 G 7 54°F 1020.7 hPa

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 mi46 minN 010.00 miFair49°F48°F97%1019.5 hPa
Petaluma Municipal Airport, CA13 mi64 minN 010.00 miFair46°F46°F100%1020.7 hPa
Novato / Gnoss Field, CA21 mi64 minN 010.00 miFair50°F46°F88%1020.7 hPa

Wind History from STS (wind in knots)
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Last 24hrNW3N4SW3S5S4S8S10SE12SE12SE11SE8S5S3S4CalmSE4S3CalmCalmNW3CalmSW3CalmCalm
1 day agoCalmCalm4NW7N7NW83CalmNW6CalmNW10CalmNW6NW3NE3N3CalmCalmW4W3W3W3CalmCalm
2 days agoCalmCalmCalmCalmS5S6533S6SW8SW5SE3W4CalmCalmW3CalmCalmSW3CalmCalmCalmCalm

Tide / Current Tables for Upper drawbridge, Petaluma River, San Pablo Bay, California
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Upper drawbridge
Click for Map
Sat -- 12:39 AM PDT     2.15 feet Low Tide
Sat -- 01:05 AM PDT     Moonset
Sat -- 05:58 AM PDT     6.44 feet High Tide
Sat -- 06:26 AM PDT     Sunrise
Sat -- 11:14 AM PDT     Moonrise
Sat -- 01:38 PM PDT     -0.48 feet Low Tide
Sat -- 07:52 PM PDT     Sunset
Sat -- 08:28 PM PDT     5.14 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.32.22.83.8566.46.25.44.22.71.30.2-0.4-0.40.11.12.33.54.55.15.14.63.8

Tide / Current Tables for Lakeville, Petaluma River, San Pablo Bay, California
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Lakeville
Click for Map
Sat -- 12:31 AM PDT     2.14 feet Low Tide
Sat -- 01:04 AM PDT     Moonset
Sat -- 05:46 AM PDT     6.23 feet High Tide
Sat -- 06:26 AM PDT     Sunrise
Sat -- 11:14 AM PDT     Moonrise
Sat -- 01:30 PM PDT     -0.47 feet Low Tide
Sat -- 07:52 PM PDT     Sunset
Sat -- 08:15 PM PDT     4.96 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.22.22.93.95.166.25.953.82.41.10.1-0.4-0.40.21.22.43.64.54.94.84.33.6

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (11,2,3,4)
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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.