Wednesday, June28, 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 6:30AMSunset 8:39PM Wednesday June 28, 2017 1:58 AM CDT (06:58 UTC) Moonrise 10:26AMMoonset 11:30PM Illumination 18% Phase: Waxing Crescent; Moon at 4 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 280630 aaa
afdewx
area forecast discussion... Updated
national weather service austin san antonio tx
130 am cdt Wed jun 28 2017

Update
Please see the 06z aviation forecast discussion below.

Aviation
Low clouds continue to develop early this morning with MVFR cigs
expected at all TAF sites beginning around 07z and continuing through
the morning hours. We could see some brief ifr CIGS develop toward
sunrise along the i-35 corridor and we'll continue to monitor trends
for this possibility. CIGS should lift intoVFR for the afternoon
hours. While we can't rule out some isolated convection across the
region this afternoon, coverage should remain isolated and we will
not mention in the forecast.

Prev discussion issued 851 pm cdt Tue jun 27 2017
update...

showers and thunderstorms have generally dissipated across the region
tonight with outflow boundaries quickly propagating west out of the
region. Additional development is not expected as the broad upper
level trough associated with last night's weak MCV continues to push
southeast over the gulf of mexico. New shower development on the
northern side of this disturbance should still remain south of the
region, so we have cleared all pops tonight after 9 pm across the
region. Isolated shower activity is expected to redevelop over the
coastal plains tomorrow morning before isolated to possibly scattered
showers and thunderstorms expand towards the i-35 corridor but
likely remain to the east. Hi-res models generally do not show much
in the way of coverage and global models have been trending lower on
pops due to a stronger cap around 800-850 mb, so rain chances for
tomorrow may decrease further if these trends continue and the
disturbance pushes far enough to the east. Aside from changes to pops
through tomorrow, only minor changes were made to the forecast based
on observational and model trends.

Prev discussion... Issued 622 pm cdt Tue jun 27 2017
update...

isolated showers and storms across south central texas will gradually
dissipate around and after sunset. A few could approach the Sat and
drt terminals before then. Outside of an showers and storms,VFR
conditions through the evening hours. MVFR ceilings with stratus
will develop 06z-09z across the region. A few isolated spots could
see ifr ceilings around sunrise.VFR conditions re-develop 16z-18z.

E to SE winds diminishing after sunset to around 5 kts or less then
increasing to 5-10 kts after 16z. Less coverage of showers and storms
on Wednesday, and primarily located east of i-35.

Prev discussion... Issued 242 pm cdt Tue jun 27 2017
short term (tonight through Wednesday night)...

scattered to numerous showers and thunderstorms are once again
developing across south central texas. The majority of activity is
across the coastal plains where the moisture content is highest. Pw
values currently range from near 1.5 inches across the west to 2+" in
the coastal plains. With these values, and overall slow-storm motions
should see the threat for locally heavy rainfall continue into the
early evening hours before the loss of daytime heating begins to
dwindle shower and storm activity. These showers and storms are
developing within a shear axis at 500 mb over the region which
allows for lift associated with heating to be enough to lift parcels
to the lfc. In addition, a coastal trough can be seen on 850 700 mb
surfaces off the coast of south texas. This is ensuring winds in the
lower levels of the atmosphere are out of the ese which brings in a
good fetch of gulf moisture which is leading to those higher pw
values.

Convection should mostly be over after 10 pm with some lingering
showers possible through the night, especially in the coastal plains
and i-35 corridor. Lows tonight will bottom out in the upper 60s to
lower 70s. Things will be changing for tomorrow as the previously
mentioned coastal trough slides to the northeast. This placement will
put our 850 700 mb winds more out of the ene which effectively shuts
off our access to the richer gulf moisture. Pw values are expected
to drop by about 0.4 inches tomorrow. In addition, the 500 mb shear
axis will also be more to our southeast and these two factors should
favor shower and storm activity being more confined to the coast.

Pops will be lower than previous days with 20s along the i-35
corridor and 30s 40s in the coastal plains. With the drier air, high
temperatures are expected to be about 5 degrees warmer than today.

Long term (Thursday through Tuesday)...

low chances for rain will continue Thursday and Friday, mainly east
of i-35 where pw values are expected to be highest. Moisture is
expected to drop off even further for the remainder of the forecast
and will not include any mention of pops beyond Friday. Can't
completely rule out an isolated shower in the afternoons, but overall
probabilities are too low to mention at this time. Highs will warm
each day with high temperatures Friday and this weekend in the middle
to upper 90s for much of the area. Lows will also be warmer, in the
middle to upper 70s.

Preliminary point temps pops
Austin camp mabry 92 74 95 77 94 10 10 20 10 10
austin bergstrom intl airport 92 73 94 77 94 20 10 20 10 20
new braunfels muni airport 91 73 94 76 95 20 10 20 10 20
burnet muni airport 90 72 93 75 93 10 10 10 - 10
del rio intl airport 96 74 100 77 100 - - - - -
georgetown muni airport 91 73 94 76 94 10 10 10 10 10
hondo muni airport 93 72 98 76 98 10 - 10 10 10
san marcos muni airport 92 73 94 77 95 20 10 20 10 20
la grange - fayette regional 91 74 93 78 93 20 10 30 10 30
san antonio intl airport 93 74 95 77 96 20 10 10 10 10
stinson muni airport 93 74 96 77 96 20 10 10 10 10

Ewx watches warnings advisories
None.

Mesoscale aviation... 24
synoptic grids... Oaks


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lago Vista TX, Rusty Allen Airport, TX6 mi64 minN 010.00 mi72°F70°F94%1016.3 hPa
Austin City, Austin Camp Mabry, TX11 mi68 minN 010.00 miFair74°F71°F91%1014.2 hPa
Austin Executive Airport, TX18 mi64 minN 010.00 mi72°F71°F100%1015.2 hPa
Austin-Bergstrom International Airport, TX21 mi66 minN 09.00 miFair71°F70°F96%1014 hPa
Georgetown, Georgetown Municipal Airport, TX21 mi64 minN 010.00 miFair73°F66°F78%1015.6 hPa

Wind History from RYW (wind in knots)
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Last 24hrCalmN4CalmS4CalmN4CalmNE4NE3E7E5SE4CalmE9E5E8SE11
G21
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1 day agoSE4S6E4E3CalmN4N4CalmCalmSE3CalmE3CalmNE5E7E6SE5E7E5S12
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2 days agoE3NE6NE4N6N5NE5NE4NE4NE3NE7E7NE6E7
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E8E7E6E4NE5NE5E4SE4CalmE4

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
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GOES Local Image of SouthCentralPlains    EDIT
Geos

Wind Forecast for Austin/San Antonio, TX (2,6,7,8)
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Ground Weather Radar Station Central Texas
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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.