Saturday, August19, 2017 L-36.com


Marine Weather and Tides
Volente, TX

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 6:59AMSunset 8:09PM Saturday August 19, 2017 12:35 AM CDT (05:35 UTC) Moonrise 3:41AMMoonset 5:41PM Illumination 10% 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 Volente, TX
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location: 30.43, -97.91     debug


Area Discussion for - Austin/San Antonio, TX
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Fxus64 kewx 182326 aaa
afdewx
area forecast discussion... Updated
national weather service austin san antonio tx
626 pm cdt Fri aug 18 2017

Aviation 00z tafs
vfr conditions are expected throughout this forecast period. Majority
of model guidance and forecast soundings are indicating more of a
s SW flow off the surface after 06z which should lead to less low
cloud development. At this time have elected to go with sct from
07z-15z. Future forecast may need to add in some MVFR CIGS during
this time frame. Should see the SE flow increase to 10-15 knots during
the early evening from the sea breeze influence along i-35. By 06z
winds become southerly and decrease to 5-8 knots. Will see S SE winds
8-12 knots after 16z Saturday. Any isolated convection this evening
and Saturday afternoon evening along the rio grande should remain at
least 10 nautical miles away from the airport.

Prev discussion issued 236 pm cdt Fri aug 18 2017
short term (tonight through Saturday night)...

continued focus today and tomorrow remains on the elevated heat index
values and temperatures with readings running slightly above normal.

Temperatures near 100f will be common with heat index values
reaching into the 103-108f range each afternoon. Little to no rain is
expected.

A steady h5 ridge of high pressure remains elongated across south-
central texas eastward to the northern gulf of mexico. This
suppression, and drier air aloft per water vapor satellite imagery,
will mean few clouds and no rain chances for much of the region today.

Temperatures will reach the upper 90s and low 100s this afternoon. A
special weather statement is in effect for the heat indices reaching
upwards of 103-107f. Weak upslope flow and stronger heating on the
periphery of the high in mexico is aiding some showers and
thunderstorms west of the rio grande river. While some of this
activity could cross into val verde late this afternoon, limited
coverage and impacts are expected.

Another warm night expected with low clouds developing by dawn
Saturday as we repeat the weather from today. While the h5 ridge is
not overly strong (592dm) tomorrow, very weak CAPE due to strong
mixing of the boundary layer will highly limit cloud and convective
potential. Expect another hot (but not overly hot) day as another
special weather statement is likely. Temperatures will fall short of
heat advisory criteria.

Long term (Sunday through Friday)...

continued status quo late-weekend and early next week as temperatures
top out near 100f each day. A pattern change will occur starting
Tuesday-Thursday next week that could result in greater rain chances
for the region. Fingers crossed!
water vapor channels currently depict a mid- to upper level-low over
the fl peninsula and models track this feature across the gulf of
mexico through the weekend. By early next week, the feature will be
near the texas coast. This feature, along with greater moisture in
the mid and upper-levels should aid in at least coastal plain showers
and storms. Both the ec and GFS also indicate a stronger longwave
trough over the mid-ms valley that will attempt to bring a back-door
front into north texas. The question at this time will be how strong
will the convection along the boundary be and can it force the line
farther south? The ec is more bullish on bringing more rain to the
region in the QPF signal while GFS keeps most activity north. The
previous instance from just over a week ago yielded more weight to be
placed on the ec. While overall superblend model chances were
reduced, kept at least a 20-30% chance of thunderstorms Wednesday and
potentially into Thursday of next week.

Also of note will be the future track of current tropical storm
harvey. Model indications suggest harvey to go inland across the
yucatan peninsula and possibly re-emerge into the bay of campeche.

Majority of model guidance envelope keeps the storm south of the
region. Will provide updates if the track shifts farther north.

Preliminary point temps pops
Austin camp mabry 77 100 76 100 77 0 - 0 - 0
austin bergstrom intl airport 76 100 75 99 76 0 - 0 - 0
new braunfels muni airport 75 99 75 99 75 0 - 0 - 0
burnet muni airport 73 97 72 96 73 0 0 0 0 0
del rio intl airport 78 101 77 101 77 - 0 0 0 0
georgetown muni airport 74 98 74 98 75 0 - 0 - 0
hondo muni airport 74 101 74 100 74 0 0 0 0 0
san marcos muni airport 75 100 75 99 75 0 - 0 - 0
la grange - fayette regional 77 100 76 100 76 - 10 0 10 10
san antonio intl airport 76 100 76 99 76 0 0 0 - 0
stinson muni airport 76 98 75 99 76 0 - 0 - 0

Ewx watches warnings advisories
None.

Mesoscale aviation... 10
synoptic grids... Runyen
public service data collection... Williams


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lago Vista TX, Rusty Allen Airport, TX6 mi40 minS 510.00 miFair84°F69°F62%1017.3 hPa
Austin City, Austin Camp Mabry, TX11 mi44 minVar 610.00 miFair86°F72°F63%1014.7 hPa
Austin Executive Airport, TX18 mi40 minS 710.00 miFair84°F71°F66%1016.3 hPa
Austin-Bergstrom International Airport, TX21 mi42 minS 1010.00 miA Few Clouds85°F73°F68%1014.5 hPa
Georgetown, Georgetown Municipal Airport, TX21 mi39 minS 810.00 miFair86°F70°F59%1015.8 hPa

Wind History from RYW (wind in knots)
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Last 24hrS4S6S7S6S5S8SW5S5S7
G14
SW5SW8SW7
G14
SW4SW3CalmSE4CalmE6SE5SE3S3SE4SE9S8
1 day agoS9S11S8S10
G15
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SW7S7S8SW8
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S4S5S4S4N10
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NE9E3S4
2 days agoS6S7
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SE4S6S7S6SE9
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G20
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G15

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_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of SouthCentralPlains    EDIT
Geos

Wind Forecast for Austin/San Antonio, TX (1,6,7,8)
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Ground Weather Radar Station Central Texas
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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.