Friday, August18, 2017 L-36.com


Marine Weather and Tides
Tahoma, 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 6:16AMSunset 7:50PM Friday August 18, 2017 11:12 AM PDT (18:12 UTC) Moonrise 1:53AMMoonset 4:38PM Illumination 13% Phase: Waning Crescent; Moon at 26 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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7 Day Forecast for Marine Location Near Tahoma, CA
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location: 39.03, -120.28     debug


Area Discussion for - Sacramento, CA
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Fxus66 ksto 181000
afdsto
area forecast discussion
national weather service sacramento ca
300 am pdt Fri aug 18 2017

Synopsis
Temperatures near to above normal through the forecast period
with a threat of afternoon evening mountain thunderstorms.

Discussion (today through Sunday)
Strong high pressure from the epac extends inland over interior
norcal and will result in highs today near or a few degrees
warmer. High temperature of 109 in redding yesterday set a new
record. Record high for today at krdd is 110 and although 109 is
forecast, this record could be tied or broken. Most all other
areas will be well below record values today, but upwards of 5 to
10 degrees above normal. Flow through the delta has been strong
overnight, but will trend down during the morning hours. Marine
layer is about 500 feet shallower than 24 hours ago due to
increased subsidence. As a result, MAX temperatures around delta
influenced areas will likely be similar or a few degrees warmer
today. Elevated instability progs showing increased 700-500 mb mu
cape and tt values over the higher terrain of the sierra nevada
and coastal range this afternoon to support isolated thunderstorm
development.

Heights thicknesses trend down over interior norcal through the
weekend as upper troughing deepens over the area. As a result,
onshore flow increases along with depth of marine layer. High
temperatures cool to near normal by Sunday into Monday. Afternoon
thunderstorms will continue to be possible over the higher
terrain of the sierra nevada Saturday and Sunday, expanding to
include the northern and coastal mountains Monday.

Pch
.Extended discussion (Tuesday through Friday)
an upper level low set up over socal will help to push moisture
north into norcal for the start of the extended period. This will
bring the chance for mountain thunderstorms on Monday and Tuesday
during the afternoon and evening hours. There will be plenty of
moisture in the region to bring scatted clouds to the valley both
Monday and Tuesday also. The upper level low will still be hanging
around on Wednesday but sounding profiles don't look quite as
favorable for convection and that should limit t-storm activity.

The upper level low will be working east on Thursday as a trough
drops south into the pacnw. The latest euro run has lined up
nicely with the GFS keeping the main energy well to our north over
canada. This will bring dry conditions to round out the extended
period. Not expecting anything crazy with temperature throughout
the forecast as they will be plus or minus a few degrees from
average.

-cjm

Aviation
Vfr conds ovr intr norcal nxt 24 hrs exc LCL MVFR ifr poss in st
vcnty of delta til arnd 17z. Isold aftn TSTM poss ovr hyr trrn of
siernev and cstl mtns btwn 21z-01z. Swly sfc wnd gsts to 25 kts
poss thru delta til 16z and agn aft 00z.

Sto watches warnings advisories
None.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
South Lake Tahoe, Lake Tahoe Airport, CA17 mi19 minNE 710.00 miFair75°F48°F40%1019.8 hPa
Truckee-Tahoe, CA21 mi2.5 hrsN 010.00 miClear59°F44°F59%1026.7 hPa

Wind History from TVL (wind in knots)
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Last 24hrN5N5NE8CalmN7N4CalmCalmCalmCalmS3S3S3SW3S3S3S3CalmCalmS3CalmCalmNE3NE7
1 day ago--Calm43SW14
G22
S11
G17
S7CalmN3CalmS3S3CalmCalmS3S3CalmCalmSW3S3S4CalmNE34
2 days ago3NE8--33S7S7S7N3CalmCalmS3CalmCalmCalmCalmS4CalmS3CalmS5CalmNE63

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
Click for Map
Fri -- 02:59 AM PDT     Moonrise
Fri -- 03:58 AM PDT     3.27 feet High Tide
Fri -- 06:23 AM PDT     Sunrise
Fri -- 01:15 PM PDT     -0.04 feet Low Tide
Fri -- 05:41 PM PDT     Moonset
Fri -- 05:56 PM PDT     2.47 feet High Tide
Fri -- 07:55 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.81.42.333.33.22.92.41.91.40.90.50.1-00.10.81.62.22.52.321.61.20.9

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

Fri -- 02:59 AM PDT     Moonrise
Fri -- 03:58 AM PDT     3.28 feet High Tide
Fri -- 06:23 AM PDT     Sunrise
Fri -- 01:15 PM PDT     -0.03 feet Low Tide
Fri -- 05:41 PM PDT     Moonset
Fri -- 05:56 PM PDT     2.48 feet High Tide
Fri -- 07:55 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.81.42.333.33.22.92.41.91.40.90.50.1-00.10.81.62.22.52.321.61.20.9

Weather Map and Satellite Images
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Weather Map
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IR Satellite Image from GEOS
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GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for Sacramento, CA (14,3,4,5)
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Ground Weather Radar Station Reno, NV
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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.