Monday, April24, 2017 L-36.com


Marine Weather and Tides
Carson City, NV

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 6:06AMSunset 7:47PM Monday April 24, 2017 6:10 AM PDT (13:10 UTC) Moonrise 5:19AMMoonset 5:53PM Illumination 3% Phase: Waning Crescent; Moon at 28 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 Carson City, NV
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location: 39.15, -119.74     debug


Area Discussion for - Reno, NV
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Fxus65 krev 241041
afdrev
area forecast discussion
national weather service reno nv
341 am pdt Mon apr 24 2017

Synopsis
Several weak systems passing through the region throughout the work
week will bring chances for light showers in addition to breezy
conditions. Temperatures near to slightly below average for much
of the week will fall to well below average Friday. Drier conditions
with a warming trend are expected for the weekend.

Short term
The main changes to the short term forecast include increasing
winds on Wednesday and restricting pop further Tuesday and Tuesday
night (to mainly well north of i-80).

Low pressure is approaching the oregon coast this morning with an
associated upper jet in excess of 100 kts. The low is drawing in
a moisture plume with pwats between 1" and 1.25" near and off the
northern ca coast. Rain, and snow above about 6000 feet, has
broken out in the northern sierra and across northeast california
with the incoming plume and forcing.

The heaviest precipitation is expected this morning in the northern
sierra and across northeast ca and far northwest nv, with rates
tapering off this afternoon once low pressure moves off into
eastern oregon and idaho. As far as impacts, while right now higher
sierra roads just look wet (road temps above freezing) the heavier
rates could allow for light accumulations over donner and echo
summits through mid-morning so be sure to check with caltrans
before traveling there.

For western nv and mono county today, breezy conditions will be
the main story with fairly stout shadowing in the lee of the
sierra expected due to weaker forcing farther from the upper low.

Temperatures will be 5-10 degrees cooler today as compared to
Sunday.

Late tonight through much of the day Tuesday, a shortwave ridge
will build over northeast ca and western nv for drier conditions
and lighter winds. Turning to Tuesday night and Wednesday,
simulations are focusing the main area of precipitation over
northwestern ca and southern oregon as the upper jet re-focuses
farther north. Still, light to very light precipitation will be
possible, especially north of i-80, as moisture aloft remains
moderate to high. Snow levels are expected to rise Tuesday night
and Wednesday so pass impacts due to weather look minimal at this
time, especially given the light qpf.

Of more importance by Wednesday could be winds as MOS indicates
sustained winds of 20-32 knots for western nv. Some areas of the
western great basin may need a wind advisory by Wednesday afternoon,
although confidence is low due to extensive cloud cover and fairly
moist conditions in current simulations. In any case, it could be
the breeziest day of the short term. Snyder

Long term Thursday through Sunday...

a backdoor cold front is expected to move through late Thursday into
Friday as the trough over the intermountain west deepens. Below
average temperatures are expected both days with the coldest day
Friday. Highs in the 40s and 50s will feel even colder with a brisk
north wind. Any precipitation along the front would be very light
and looks isolated. Moisture is rather shallow and the best forcing
will be much further east. The flow eventually turns northeast
Friday night with good support for a gusty NE winds over the sierra
crest.

High pressure over the east pacific will also amplify some and nudge
east this weekend. However, it does not appear that it will move
that far east as more short waves will drop down the east side into
early next week. These won't be as cold, but they will prevent a
large warmup and it appears temperatures will likely be near average
instead of well above if the ridge were to move onshore. Wallmann

Week 2 outlook May 1st-7th... Issued 3pm 4/23...

a ridge of high pressure, or upside down trough, is again forecast
for the far eastern pacific during the first week of may. There is
still relatively high uncertainty on whether, or at least when, the
ridge axis will be able to progress over the western u.S. Bringing
well above average temperatures to the region. Model simulations
during this very active winter and spring have been over predicting
ridging along the west coast. With the ridge building in the far
eastern pacific shortwaves will continue to be able to dig into the
great basin keeping the ridge axis out to sea. This may keep the
ridge from creating significant amplification over the west coast
until near the end of, or past, the 2 week time period.

With the ridge continuing to strengthen in the eastern pacific,
confidence is relatively high (for a week 2 outlook) that we won't
see any strong atmospheric river induced storms for the beginning of
may. Fast moving cold fronts dropping in from the north with periods
of light precipitation will remain possible as long as the ridge
axis remains offshore.

So at this time, confidence is moderate that the first week of may
will remain below average for precipitation. Confidence remains
lower for how far inland (specifically in the sierra), above average
temperatures will be felt and by when. With the near record snowpack
in the sierra, any extended period of well above average
temperatures will remain a concern, and we will continue to keep a
close eye on that potential. -zach
* the week 2 outlook discussion is an experimental part of the area
forecast discussion. This product is designed to highlight the
potential for significant pattern changes beyond day 7 and will
not be issued on a daily basis.

Aviation
Gusty winds expected today with a decent cold front moving through
this evening. Sfc wind gusts to 35 kts are possible at all terminals
this afternoon into the early evening. Mtn wave turbulence will
occur as well with localized llws until 18z. After 18z, mixing
during the day will result in a deeper mixed layer with less shear,
but there could be a good shear layer at 10k msl.

Aside form the winds, areas of MVFR west of a ksve to ktvl line with
mtn obscn in -ra. Rain looks to end around 06z tonight with
generallyVFR conditions all areas after. Tuesday will see lighter
winds andVFR before winds increase again on Wednesday along with a
few more showers. Wallmann

Rev watches/warnings/advisories
Nv... Lake wind advisory from 11 am this morning to 8 pm pdt this
evening for pyramid lake in nvz004.

Lake wind advisory until 8 pm pdt this evening for lake tahoe in
nvz002.

Ca... Lake wind advisory until 8 pm pdt this evening for lake tahoe in
caz072.

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
Carson City Airport, NV3 mi16 minSE 13 G 2610.00 miOvercast45°F32°F61%1010.8 hPa
South Lake Tahoe, Lake Tahoe Airport, CA22 mi18 minSE 83.00 miLight Snow Fog/Mist35°F32°F89%1010 hPa
Truckee-Tahoe, CA24 mi16 minSSE 910.00 miLight Rain34°F32°F93%1012.2 hPa

Wind History from CXP (wind in knots)
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Last 24hrCalmSW5W6W5W7SW9
G19
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W15
G22
W7
G16
NW7
G17
SW11
G20
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W5SW6CalmSE6
G14
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G22
SE8
1 day agoCalmCalmCalmCalmE5E4N3S11
G19
SW12
G18
SW15
G25
W10
G20
W18
G24
W14
G24
W9W11
G17
--W5SW3SW6W8CalmW5W10
G16
W6
2 days agoCalmCalmCalmCalmS3CalmNE6NE8
G14
E11
G16
NE9E11E9E13E13NE13
G16
NE10
G16
NE9S3CalmCalmCalmCalmCalmCalm

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
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IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for Reno, NV (9,2,3,4)
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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.