Thursday, September21, 2017 L-36.com


Marine Weather and Tides
Yuba City, CA

Version 3.4
What's New / NOTES
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.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:53AMSunset 7:05PM Thursday September 21, 2017 6:54 AM PDT (13:54 UTC) Moonrise 7:18AMMoonset 7:16PM Illumination 1% Phase: New Moon; Moon at 1 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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PZZ531 San Francisco Bay South Of The Bay Bridge- 225 Am Pdt Thu Sep 21 2017
.small craft advisory in effect from 1 pm pdt this afternoon through this evening...
Today..NW winds 15 to 25 kt.
Tonight..W winds 15 to 25 kt.
Fri..W winds 5 to 15 kt.
Fri night..W winds 10 to 20 kt.
Sat..W winds 10 to 20 kt.
Sun..N winds 10 kt...becoming sw.
Mon..E winds 10 kt...becoming w.
PZZ500 225 Am Pdt Thu Sep 21 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Increasing northwesterly winds will continue across the coastal waters today behind a cold front that moved through the region on Wednesday. Moderate northwest swell will continue through the rest of the week and into the weekend.

7 Day Forecast for Marine Location Near Yuba City, CA
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location: 39.11, -121.68     debug


Area Discussion for - Sacramento, CA
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Fxus66 ksto 211150
afdsto
area forecast discussion
national weather service sacramento ca
450 am pdt Thu sep 21 2017

Synopsis
Unseasonably cool weather system will bring mountain rain and
snow showers into early tonight. Several inches of snow are
possible at high elevations. Turning warmer and drier this
weekend.

Discussion
A winter like trough will continue dropping south into northern
california today. Disturbance currently over southern oregon will
swing through the sierra during mid-morning and exit early
tonight. Steepening lapse rates will contribute to increasing
instability over the sierra... Especially locations above 5000
feet. Short term meso-scale models(hrrr) support scattered
convection this afternoon at higher elevations and have introduced
thunderstorms to the forecast.

Snow levels presently around 7000 feet along the I 80 and highway
50 corridors will fall to around 6000 feet during the day as cold
air advection works south. Moisture is a bit limited... However
cold early nature and sufficient instability will act efficiently
with available moisture. Hrrr nbm give liquid precip amounts from
0.25-0.75 inches over the sierra. Snow amounts from 3 to 6 inches
with higher amounts over peaks seems likely in this scenario.

Since late september is an unusually early time for this amount
of snow have decided to issue a winter weather advisory above 7000
feet with main concern near donner pass. Convective nature of
showers will mean potentially large variability in amounts from
place to place.

Trough will shift east into northern nevada with cut-off low
developing. Second disturbance will drop south along the sierra
late Friday with another quick shot of snow above 6500 feet with
the focus more south of highway 50. 2 to 4 inches looks possible
at this time.

.Extended discussion (Monday through Thursday)
high pressure ridging spreads in from the west as the deep upper
trough shifts eastward into the rocky mountain region by early
next week. Confidence is high for a warm and dry pattern over
norcal at least through the first half of next week. Temperatures
will be above normal starting on Monday, and trending upward a few
degrees more on Tuesday. Valley highs generally in the lower 90s
are forecast for Tuesday through Thursday.

Breezy north winds are expected to continue through mid week next
week. These winds will act to warm and dry the area, creating an
elevated fire risk for the area. Ek

Aviation
Vfr conditions expected for valley TAF sites for the next 24
hours. Scattered mountain foothill rain showers and isolated
thunderstorms expected through tonight, along with snow showers
above 6000 feet. Northerly winds expected with gusts up to 14-18
kts at TAF locations this afternoon. Ek

Sto watches warnings advisories
Winter weather advisory in effect from 8 am this morning to
11 pm pdt this evening above 7000 feet...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SFXC1 - San Francisco Bay Reserve, CA 66 mi130 min NW 6 52°F 1010 hPa47°F
PCOC1 - 9415144 - Port Chicago, CA 75 mi67 min SW 8.9 G 13 56°F 68°F1010.6 hPa
RCMC1 - 9414863 - Richmond, CA 91 mi67 min NW 11 G 16 58°F 65°F1010.7 hPa

Wind History for Port Chicago, CA
(wind in knots)    EDIT      (on/off)   Help
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W16
W12
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G20
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G26
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1 day
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SW7
G11
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W6
W3
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SE3
G6
W11
W12
G15
W15
SW9
G12
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G12
SW10
W8
G14
SW9
SW4
SW7
G11
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G14
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G20
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2 days
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SW5
G9
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G11
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G15
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G16
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G15
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G18
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G20
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G16
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G21
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G22
SW8
G13
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SW10
G15
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G23
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W16
W12
G15
W12
G16

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Marysville, Yuba County Airport, CA6 mi62 minNNW 510.00 miA Few Clouds53°F39°F61%1010.3 hPa
Marysville, Beale Air Force Base, CA13 mi1.9 hrsWNW 610.00 miFair53°F39°F61%1009.4 hPa
Lincoln Regional Karl Harder Field, CA22 mi80 minN 010.00 miFair50°F44°F82%1009.8 hPa

Wind History from MYV (wind in knots)
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Last 24hrSE8SE12SE12SE13S14S15
G20
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S11SW16
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SW9W10SW6SW7SW3SW8SW5W5N4N8N8N4N3NW7NW5
1 day agoNW3CalmCalmCalm3NW8N10
G16
N8N13
G17
NW6
G16
6N7N3CalmW4CalmE3CalmE4SE3E3SE5S5SE8
2 days agoSE9S7SE15
G20
SE10S15S13S9S10SW6W5W8W10SW7S4S9SE8S6SE5SE5SE3CalmCalmCalmCalm

Tide / Current Tables for Sacramento, Sacramento River, California
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Sacramento
Click for MapNote: These data apply only during low river stages.

Thu -- 04:01 AM PDT     0.28 feet Low Tide
Thu -- 06:53 AM PDT     Sunrise
Thu -- 08:16 AM PDT     Moonrise
Thu -- 08:23 AM PDT     2.84 feet High Tide
Thu -- 04:15 PM PDT     0.18 feet Low Tide
Thu -- 07:04 PM PDT     Sunset
Thu -- 08:15 PM PDT     Moonset
Thu -- 08:54 PM PDT     2.90 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.61.10.70.40.30.61.52.32.82.82.52.11.61.10.70.30.20.41.122.72.92.82.4

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
Click for Map
Thu -- 04:01 AM PDT     0.28 feet Low Tide
Thu -- 06:53 AM PDT     Sunrise
Thu -- 08:16 AM PDT     Moonrise
Thu -- 08:22 AM PDT     2.83 feet High Tide
Thu -- 04:14 PM PDT     0.18 feet Low Tide
Thu -- 07:04 PM PDT     Sunset
Thu -- 08:15 PM PDT     Moonset
Thu -- 08:54 PM PDT     2.89 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.61.10.70.40.30.61.42.32.82.82.52.11.61.10.60.30.20.41.122.72.92.82.4

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for Sacramento, CA (9,2,3,4)
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Ground Weather Radar Station Beal AFB, CA
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weather_mapweather_map weather_map

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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.