Friday, July21, 2017 L-36.com


Marine Weather and Tides
Spanish Springs, NV

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 5:47AMSunset 8:23PM Thursday July 20, 2017 9:44 PM PDT (04:44 UTC) Moonrise 3:06AMMoonset 5:48PM Illumination 7% 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 Topaz, CA
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location: 38.67, -119.53     debug


Area Discussion for - Reno, NV
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Fxus65 krev 210108
afdrev
area forecast discussion
national weather service reno nv
608 pm pdt Thu jul 20 2017

Update
Zephyr winds once again brought smoke from the detwiler fire into
the tahoe basin and western nevada. Air quality readings are
lower than yesterday, but starting to nudge into the unhealthy
range.

Latest smoke plume simulations show the worst air quality could
filter into mono, alpine and douglas counties tonight. For the
tahoe basin and reno-carson area, smoke should diminish 7-10 pm
then may return again by early morning.

Will hold off on any dense smoke advisories for now as satellite
data shows the thick plumes off the detwiler fire are stretching
north and south along the western slopes. Brong

Synopsis
Areas of smoke from the detwiler fire will produce periods of
unhealthy air quality across the sierra and western nevada for the
next couple of days. Dry conditions will continue with
temperatures warming a few degrees by this weekend. Low pressure
off the west coast may bring a chance for showers and
thunderstorms Sunday through the middle of next week.

Previous discussion issued 243 pm pdt Thu jul 20 2017
discussion...

the main weather issue through Saturday will be the smoke and haze
from the detwiler fire. At a minimum, hazy conditions are likely
to continue through at least Friday especially from reno-tahoe and
i-80 southward. If the fire generates large smoke plumes each
afternoon, the risk for higher smoke concentrations and poor air
quality would be highest across alpine mono counties and western
nv mainly south of us-50.

Otherwise, we are expecting dry conditions through Saturday with
near average temperatures mainly in the 90s Friday, then rising to
around 100 degrees in lower elevations Saturday as high pressure
ridge over the southwest us expands across most of the great
basin. Warm temperatures aloft will inhibit thunderstorm
formation, but some afternoon cumulus buildups are probable
especially south of us-50 on Saturday.

By Sunday and Monday, the potential for showers and thunderstorms
will increase as an upper low approaches the california coast
while moisture rotates around the periphery of the ridge over the
southwest us. The latest guidance seems a little more favorable
for increasing instability both days, with some forcing associated
with the low, especially on Monday as it ejects inland across far
northwest nv. The location track of the low remains in question,
but overall it appears that enough favorable factors for
convection will come together, so we continued a mention of
thunder across the region both days with some lingering showers
possible during the overnight morning hours. Initially there could
be an increased risk for dry lightning strikes on Sunday, then
transition to a mix of wet and dry storms with potential for
strong outflow gusts.

By Tuesday and Wednesday, the overall trend appears to favor
decreasing thunderstorm chances as the western portion of the
ridge weakens a bit in response to a trough brushing the pacific
northwest coast, with drier southwest flow aloft over the sierra.

The evolution of this transition could occur slowly so we opted
for a more gradual reduction of the areas with thunder chances
(limited to west central nv southward to mono county by
Wednesday). Temperatures both days are expected to ease back to
near-seasonal highs mainly in the 90s for lower elevations.

By next Thursday, a drier and more stable air mass appears more
likely to spread across west central nv so we did not include
thunder chances. The concern could shift to increasing winds,
although at this time the stronger southwest flow looks to remain
north of the sierra, so we are currently anticipating zephyr-type
breezes with gusts 25-30 mph. Mjd
aviation...

the main aviation concern for the next couple of days will be the
smoke and haze from the detwiler fire in mariposa county,
california. So far today the push of new smoke from this fire
appears to be spreading east toward the central sierra, and may
reach the northern half of mono county by early evening. This new
smoke could bypass the main terminals, resulting in only limited
reductions to surface visibility. Slantwise visibility will be
lower across the region as long as haze areas are present and
especially during the morning hours. Outside of the smoke and haze
areas,VFR conditions will prevail with typical afternoon breezes
(gusts near 20 kt) today and Friday, then lighter winds Saturday.

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
Reno, Reno Tahoe International Airport, NV17 mi50 minNW 14 G 2110.00 miFair80°F34°F19%1013.7 hPa
Reno/Stead, NV18 mi55 minWNW 1110.00 miFair72°F35°F27%1021 hPa

Wind History from TVL (wind in knots)
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Last 24hrS4CalmCalmCalmCalmS3S3SW3S3CalmS3CalmNE5NE6NE9CalmNE10CalmS10S10
G15
5S6S6SW3
1 day agoS4CalmCalmCalmCalmS3S3S3CalmCalmCalmNE55S9
G15
4SW945S10
G17
S9
G14
S12S6CalmS4
2 days agoCalmCalmCalmCalmCalm--CalmCalm4CalmE35S8
G15
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SW13
G30
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G22
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G28
S14
G17
S8
G18
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G16
5SW5SW6S7

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
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for Reno, NV (0,6,7,8)
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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.