Tuesday, May23, 2017 L-36.com


Marine Weather and Tides
Kirkwood, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:38AMSunset 8:14PM Tuesday May 23, 2017 1:43 AM PDT (08:43 UTC) Moonrise 3:28AMMoonset 4:51PM Illumination 6% Phase: Waning Crescent; Moon at 27 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 Kirkwood, CA
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location: 38.82, -120.06     debug


Area Discussion for - Reno, NV
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Fxus65 krev 222225
afdrev
area forecast discussion
national weather service reno nv
325 pm pdt Mon may 22 2017

Synopsis
Warm temperatures will increase snow melt this week, leading to
flooding near some creeks and streams flowing out of the sierra.

The walker river through the mason valley and yerington is expected
to reach minor flood stage Wednesday then cresting just below
moderate flood on Friday. Some minor flooding is also likely for
the upper portions of the carson and truckee river systems.

Short term
There has been a significant change this morning in the forecast
for the mainstem walker river, affecting the yerington and mason
valley area. The forecast has now been adjusted down from major
flooding down to minor/moderate flooding. Please see our updated
hydrology section below for more details.

Otherwise, there have been only minor changes to the forecast. We
did increase temperatures a bit for tomorrow, as the ridge axis
pushes over, tomorrow will be the hottest day across the region.

This will push some locations in western nevada to over 90
degrees. With the well above normal temperatures across the
region, this will also get some good instability and convergence
over the sierra for come afternoon buildups. There are some
cumulus buildups over the sierra today, but with subsidence
inversion capping, we do not expect any thunderstorms for today.

By tomorrow, we will see slight cooling aloft as weak low
pressure off the ca coast pushes slowly inland. Thunderstorms were
largely removed last night from the forecast for Tuesday, but
there is still a slight chance we could see a few isolated
thunderstorms along the sierra crest in the late afternoon and
evening, along with buildups as far north as south lake tahoe.

Thunderstorm chances increase even more on Wednesday as a weak
vorticity maxima moves over the region, helping to destabilize the
atmosphere. Isolated thunderstorms will be possible on Wednesday
in mono-mineral counties, as well as to the north over the lassen
convergence zone.

Winds will increase Wednesday afternoon with gusts up to 30-40 mph
in the afternoon ahead of the front. Choppy conditions are likely
on area lakes Wednesday afternoon, especially for pyramid lake
late in the day. Hoon

Long term Thursday through Sunday...

another weak low pressure wave will brush by the region on Friday
which will help moderate temperatures for the end of the week.

However, the moderation in temperatures may only bring high
temperatures back to around average for a day or two before another
warm up this weekend.

The ridge is expected to build back into the region over the
weekend, potentially amplifying significantly for a few days as it
moves over the area. This would allow temperatures to again quickly
rebound to 5-10 degrees above average by the weekend, and maybe even
higher going into early next week. Low temperatures in the upper
elevations may come close to freezing Friday night, but this might
be the only day upper elevation temperatures approach freezing in
the near future. There will also be some possibilities of
thunderstorms in the long term, but it's a little too far out to
nail down which day may have the highest chances.

As the ridge amplifies early next week it will weaken allowing a
split flow or potentially a trough to return to the west coast.

While it does look like the ridge of high pressure will not get
stuck over us for an extended period of time, sustained above
average temperatures over the weekend and into next week will again
raise concerns for snowmelt flooding. -zach

Aviation
Vfr conditions with light winds today and a light late day zephyr
wind on Tuesday. A few flat cumulus have developed near the
mountains this afternoon. Increased instability tomorrow will allow
more significant cumulus development with a few thunderstorms
possible along the sierra crest, with the best chances around mono
and alpine counties. -zach

Hydrology
Warm temperatures through the middle of the week will accelerate
snowmelt in the sierra. The increased snowmelt will produce varying
levels of impacts next week. Anything from minor and nuisance
flooding of small creeks and streams to minor/moderate flooding
for the mainstem walker river through the mason valley.

Make sure to check the most recent forecasts and observations if you
live near a stream or river or plan to hike or camp near any streams
or rivers. Remember that snowmelt flows can be highest in the
evening and overnight in the smaller streams.

Walker river:
* walker river forecast has been lowered to minor/moderate
flooding. Major flooding is no longer expected. Current
projections have a peak flow just below moderate levels, near
10.8 feet or near 2500 cfs. Minor flood stage will be reached
Wednesday morning and flow will peak out late Friday.

* there are several reasons for the updated forecast: less
response form the snowmelt over the last couple days, new
emergency gages that have been installed near topaz allowing for
more precise management and forecasting of the west walker
river, change in anticipated releases from bridgeport reservoir,
and slightly cooler temperatures expected for the weekend.

* minor flooding is possible on the east and west forks of the
walker river. Minor flooding is already occurring on the west
walker river just downstream of wilson canyon. Areas potentially
affected include antelope and smith valleys. Higher flows are
also eventually likely below weber reservoir but the expected
extent is unknown at this time.

Truckee river:
* minor flooding impacts possible from lake tahoe to truckee. Most
of the minor flooding impacts will be confined to areas right
along the river which may impact some riverfront yards, basements,
campgrounds, and bike paths.

* the flows along the remainder of the truckee river will remain
high, swift, and cold! These conditions can always be dangerous
and it is recommend to keep a safe distance from the river.

Carson river:
* broad minor flooding in the the southwestern carson valley between
centerville and genoa.

* minor flood stage as early as Tuesday night with daily peaks
occurring each night through the week. Flows will remain cold and
swift on all portions of the river.

Eastern sierra creeks and streams:
* best estimates for flows this week coming out of unregulated
eastern sierra creeks and streams are likely to be 2-2.5 times
current flows with smaller creeks likely to see 3 times current
flows.

* creeks and streams will run fast and very cold, bringing the risk
of hypothermia for those without protective gear. Flood water will
likely inundate pasture land, some campgrounds, cover hiking and
biking trails and roads leading into the high country.

Rev watches/warnings/advisories
Nv... Flood watch through Wednesday evening nvz002-003.

Ca... Flood watch through Wednesday evening caz071>073.

For more information from the national weather service visit...

http://weather.Gov/reno


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
South Lake Tahoe, Lake Tahoe Airport, CA7 mi51 minVar 310.00 miFair48°F39°F74%1020.7 hPa

Wind History from TVL (wind in knots)
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Last 24hrS4S53S3CalmS5S3NE33NE76NE9N8NE10NE7N5NE5CalmCalmCalmS3S4S53
1 day agoS5CalmCalmCalmCalmS3CalmNE5NE6N64N6NE8
G15
5NE7N6NE6NE5CalmSW3S43SW4NE3
2 days agoCalmCalmS3CalmS3S4CalmNE34NE6NE8NE9S10
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4--6Calm3CalmSW3CalmS5S5S5

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
Click for Map
Tue -- 12:36 AM PDT     0.25 feet Low Tide
Tue -- 04:34 AM PDT     Moonrise
Tue -- 05:26 AM PDT     2.99 feet High Tide
Tue -- 05:47 AM PDT     Sunrise
Tue -- 01:57 PM PDT     -0.05 feet Low Tide
Tue -- 05:56 PM PDT     Moonset
Tue -- 06:26 PM PDT     2.30 feet High Tide
Tue -- 08:18 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.30.71.62.52.932.72.31.81.20.70.30-0.10.311.82.22.321.71.20.8

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

Tue -- 12:36 AM PDT     0.25 feet Low Tide
Tue -- 04:34 AM PDT     Moonrise
Tue -- 05:26 AM PDT     3.00 feet High Tide
Tue -- 05:47 AM PDT     Sunrise
Tue -- 01:57 PM PDT     -0.05 feet Low Tide
Tue -- 05:56 PM PDT     Moonset
Tue -- 06:26 PM PDT     2.31 feet High Tide
Tue -- 08:18 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.30.71.62.5332.72.31.81.20.70.30-00.311.82.32.321.71.20.8

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 Reno, NV (4,6,7,8)
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Ground Weather Radar Station Reno, NV
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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.