Wednesday, August21, 2019 L-36.com


Marine Weather and Tides
Plymouth, CA

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
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 6:21AMSunset 7:53PM Tuesday August 20, 2019 10:36 PM PDT (05:36 UTC) Moonrise 9:46PMMoonset 10:02AM Illumination 69% Phase: Waning Gibbous; Moon at 20 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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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 858 Pm Pdt Tue Aug 20 2019
.small craft advisory in effect from Wednesday afternoon through Wednesday evening...
Tonight..W winds 15 to 20 kt with gusts up to 30 kt, becoming sw 5 to 10 kt after midnight.
Wed..SW winds 15 to 20 kt with gusts up to 30 kt.
Wed night..SW winds 10 to 15 kt.
Thu..SW winds 10 to 15 kt.
Thu night..SW winds 15 to 20 kt with gusts up to 25 kt.
Fri..SW winds 15 to 25 kt with gusts up to 30 kt.
Fri night..SW winds 5 to 10 kt.
Sat..SW winds 15 to 20 kt.
Sun..SW winds 15 to 20 kt.
PZZ500 858 Pm Pdt Tue Aug 20 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to moderate northwest winds will persist across the coastal waters through mid-week as high pressure sits over the eastern pacific and a surface low moves into western canada. Locally gusty coastal jets are forecast south of point arena, pigeon point, and point sur that will create hazardous seas conditions for smaller vessels. Breezy afternoon and evening winds are also forecast over the san francisco bay around the golden gate and through the delta as well as over the Monterey bay. Mixed seas will continue with shorter period northwest waves at around 8 to 10 seconds, a light longer period west swell, and a light southerly swell.


7 Day Forecast for Marine Location Near Plymouth, CA
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location: 38.48, -120.84     debug


Area Discussion for - Sacramento, CA
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Fxus66 ksto 202129
afdsto
area forecast discussion
national weather service sacramento ca
229 pm pdt Tue aug 20 2019

Synopsis
Dry weather will be accompanied with increasing temperatures this
week. Most of northern california will experience above normal
high temperatures.

Discussion
An upper level trough continues to push into the pacnw this
afternoon which will keep our afternoon temperatures slightly
below average. Current readings across the region appear to be
quite pleasant if you like summer weather with the valley ranging
from the mid 70s to the mid 80s while the mountains span the upper
60s to the low 80s. Temperatures will likely climb a few more
degrees before onshore flow returns and brings some relief to the
region tonight.

Come Wednesday, temperatures will begin to warm mid- week as the
trough shifts east and high pressure strengthens. High
temperatures will be above normal across much of the valley
starting Thursday and then continuing into the weekend, with the
hottest conditions, being found north of hwy 20.

Extended discussion (Saturday through Tuesday)
The upcoming weekend will feature a building upper ridge
extending from the eastern pacific into the southwestern u.S.

Recent guidance has continued to waffle about the strength and
duration of the mentioned ridge which suggests some uncertainty in
the temperature forecast. Fairly confident in above average
temperatures for the weekend with valley highs ranging from the
upper 90s to around 105 degrees. By the start of next week, there
has been a trend in the ensemble guidance to bring an upper trough
across the pacific northwest into the north-central states. This
would lower heights a bit which ultimately keeps temperatures down
a bit, although likely still near to above average. One interesting
wrinkle in the forecast is the path of the mid upper reflection of
a tropical invest over the tropical eastern pacific. Some semblance
of an upper low is seen in the 12z gfs ECMWF lifting this feature
across 30n latitude early mid next week. Difficult to say if
anything materializes from this system across northern california.

Overall, expect temperatures around 5 to 10 degrees above
climatology during the period. ~bro

Aviation
Overall,VFR conditions are expected the next 24 hours; however,
there is some question about whether or not some stratus will form
over the sacramento and travis areas. Guidance depicts a small
chance of it again tomorrow morning, but confidence is low in it
actually forming. Wind wise, southwest wind gusts up to 15-20
knots possible across the delta and its vicinity. Otherwise, taf
sites will see wind speeds 12 knots or less.

Sto watches warnings advisories
None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SFXC1 - San Francisco Bay Reserve, CA 66 mi111 min W 6 65°F 1014 hPa55°F
PCOC1 - 9415144 - Port Chicago, CA 70 mi66 min SW 8.9 G 12 65°F 72°F1014.8 hPa
AAMC1 - 9414750 - Alameda, CA 92 mi66 min WSW 7 G 8.9 64°F 71°F1016 hPa

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sacramento Mather Airport, CA25 mi51 minS 610.00 miPartly Cloudy66°F55°F68%1013.2 hPa

Link to 5 minute data for KMHR

Wind History from MHR (wind in knots)
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Last 24hr--------------SE6SE7SE7SE7--S6S6S5SW6--SW4
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1 day ago------------------SE6SE6SE6SE5S6S4S5S5--SW7W5
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2 days agoSW10SW15--------------SE6SE7SE6S5S8S7SW7SE4
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--

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
Click for Map
Wed -- 06:25 AM PDT     Sunrise
Wed -- 07:15 AM PDT     0.54 feet Low Tide
Wed -- 11:26 AM PDT     2.20 feet High Tide
Wed -- 12:03 PM PDT     Moonset
Wed -- 06:48 PM PDT     0.38 feet Low Tide
Wed -- 07:52 PM PDT     Sunset
Wed -- 11:16 PM PDT     Moonrise
Wed -- 11:35 PM PDT     2.80 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.72.42.11.71.20.90.60.50.61.11.82.22.22.11.81.410.70.40.40.71.42.22.7

Tide / Current Tables for Clarksburg #4, Sacramento River, California
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Clarksburg #4
Click for Map
Wed -- 05:45 AM PDT     0.54 feet Low Tide
Wed -- 06:25 AM PDT     Sunrise
Wed -- 10:17 AM PDT     2.20 feet High Tide
Wed -- 12:03 PM PDT     Moonset
Wed -- 05:18 PM PDT     0.38 feet Low Tide
Wed -- 07:52 PM PDT     Sunset
Wed -- 10:26 PM PDT     2.80 feet High Tide
Wed -- 11:17 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.421.51.10.80.60.60.81.41.92.22.221.71.30.90.50.40.50.91.62.42.82.8

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Sacramento, CA (1,6,7,8)
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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.