Wednesday, October16, 2019 L-36.com


Marine Weather and Tides
Topaz, CA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
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 7:09AMSunset 6:21PM Wednesday October 16, 2019 4:59 AM PDT (11:59 UTC) Moonrise 8:16PMMoonset 9:43AM Illumination 92% Phase: Waning Gibbous; Moon at 17 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 Topaz, CA
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location: 38.67, -119.53     debug


Area Discussion for - Reno, NV
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Fxus65 krev 161039
afdrev
area forecast discussion
national weather service reno nv
339 am pdt Wed oct 16 2019

Synopsis
Warm and dry conditions with increased winds are expected today,
followed by cooler temperatures Thursday through the weekend.

There are chances for light showers late tonight into Thursday,
mainly north of i-80, as a weather system tracks along the oregon
border. Stronger winds are likely to return Saturday, producing
more significant travel, aviation, and boating impacts.

Short term
Current forecast remains on track with one more warm and dry day
today with winds increasing this afternoon-evening, followed by a
quick period of light rain and higher elevation snow showers late
tonight into Thursday morning. Cooler temperatures will follow
Thursday-Friday with brisk winds on Thursday.

The ridge of high pressure which has prevailed over ca-nv the past
few days will continue to retreat to the east as a fast moving
trough approaches the west coast.

For today, the main effects of this trough will be increased winds
this afternoon-evening with gusts 25-35 mph from us-50 northward
in northeast california and western nevada west of highway 95,
with around 25 mph south of us-50 and east of highway 95. Locally
stronger gusts are possible near the oregon border. Tahoe and
pyramid lakes will see some choppy conditions this afternoon and
evening, although overall winds and wave heights are looking a bit
short of reaching lake wind advisory levels. Sierra ridge winds
are expected to reach peak speeds tonight with gusts of 60-70 mph
which will likely keep breezy conditions going in some foothill
areas and for the tahoe basin. Improved mixing associated with
these winds will push temperatures well into the 70s for most
lower elevations, with a few sites near the us-95 corridor possibly
reaching 80 degrees.

For late tonight into Thursday morning, a cold front associated
with the upper trough passage will be accompanied by a small band
of moisture. The best rain chances will be over northeast ca-far
northwest nv, although a short period of enhanced lift along the
front could produce rain and snow showers around the tahoe basin
early Thursday morning. In these areas, precip amounts are generally
expected to be 0.10" or less, with up to 1" of snowfall in higher
elevations. We aren't anticipating precip rates to be intense
enough to bring snow levels below the 6500-7000 foot elevation or
produce significant travel impacts over the main passes. A few
sprinkles also can't be ruled out around reno-carson city and
into parts of west-central nv Thursday morning but the forcing
along the front loses its punch so these areas are unlikely to
receive meaningful rainfall.

Temperatures are expected to drop by about 15 degrees on Thursday,
with highs mainly in the lower-mid 60s for lower elevations and
50s near the sierra. Brisk west to northwest winds with gusts
20-30 mph on Thursday will also make the cooling feel more noticeable.

For Friday, similar temperatures but lighter winds are expected
as flat ridging prevails over ca-nv. Mjd

Long term Saturday through Wednesday...

raised winds substantially for Saturday, otherwise no major changes
to the long term forecast.

Ecmwf ensembles (eps) have come in much windier for northeast
california and western nevada for Saturday, while the
deterministic GFS ec continue to show notable winds. The eps
indicates gusts 35-50 mph for the sierra front and out into west-
central nevada, with the 00z ec GFS runs showing fairly similar
numbers. In addition, GFS model soundings for the western nevada
sierra front indicate the potential for even stronger gusts from
mid morning to early afternoon Saturday with 50-55 kts near ridge
level. Winds will be of concern for high-profile vehicles,
especially on north-south oriented routes, as well as aviation
(turbulence, local llws) and boaters.

As far as precipitation Saturday, the best shot continues to be
north of susanville and gerlach with the main upper forcing and
deeper moisture remaining near the nevada oregon california
border. Shallower moisture for much of the region should mean
any showers that reach the northern sierra tahoe crest should have
a hard time making it east to the highway 395 i-580 corridor,
although with strong winds aloft some sprinkles (measurable rain
unlikely) could briefly blow over into the foothills west of reno,
carson city, and minden.

Sunday and Monday, an upper ridge slowly builds overhead with high
temperatures around average. Temperatures warm further Tuesday
before they steady out or even drop slightly Wednesday, as a weak
upper wave moves through the northwest CONUS and pushes slight
cooling into the region from the north and east. -snyder

Aviation
Winds increase this afternoon evening with gusts 20-25 kts for
terminals, increasing to 40-55 kts near sierra ridgetop level.

These winds are likely to bring a substantial increase in
turbulence downwind of the sierra from late today into early
Thursday. A few rain and high elevation snow showers are also
possible late tonight and early Thursday, mainly in northeast ca,
the northern sierra, and north of i-80 in western nevada.

After lighter winds Friday, windy conditions (stronger than today-
tonight) are expected for Saturday, possibly with strong gusts at
the surface and strong turbulence aloft. -snyder jcm

Fire weather
We will be monitoring a couple of concerns heading through the rest
of this week.

* breezy conditions this afternoon and evening mainly north of
interstate 80, gusts 25-35 mph, with localized short duration
red flag conditions possible.

* the potential for a stronger wind event Saturday afternoon-
evening with wind gusts 35-50 mph (but higher humidities).

Recent dry conditions since the start of october will keep fire
concerns in play when the wind forecast ramps up, especially in
areas from i-80 southward.

For the first event today, winds will increase for many areas
north of interstate 80, with the strongest gust potential near the
nv oregon border this afternoon and evening. However, the relative
humidity should also begin to increase as these winds increase
ahead of a cold front, resulting in only localized or short duration
periods of near-critical conditions. While precipitation amounts
will be marginal late tonight into early Thursday, the influx of
moisture should help to offset the wind concerns. Winds will remain
breezy on Thursday with gusts 25-30 mph, but overall humidity values
will be higher as well. One possible exception is southern portions
of mineral-mono counties, including the us-6 corridor from benton
to bishop, where humidity values could dip into the teens Thursday
afternoon.

For Saturday, forecast winds look to be stronger with gusts in the
35-50 mph range possible for much of the area, especially along east
of highway 395. Humidity values won't be as low compared to today
but fire weather concerns will still increase with the strong wind
potential. Mjd

Rev watches warnings advisories
Nv... None.

Ca... None.

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, CA30 mi66 minS 310.00 miFair28°F19°F72%1020.1 hPa

Link to 5 minute data for KTVL

Wind History from TVL (wind in knots)
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Last 24hrS3S3S3S3Calm433S12S83SW43CalmCalmCalmCalmS3CalmS3S3CalmS3Calm
1 day agoS4S4S4S4Calm3NE534N65N4CalmCalmCalmCalmCalmCalmS3S3S3S3S3S3
2 days agoCalmS3S3S3CalmS63SW7S74S5S3SW3CalmCalmCalmCalmCalmCalmS3S4S3S4S4

Tide / Current Tables for
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Weather Map
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GEOS 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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Reno, NV (7,2,3,4)
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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.