Sunday, June25, 2017 L-36.com


Marine Weather and Tides
Lakeway, 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 6:29AMSunset 8:38PM Sunday June 25, 2017 10:45 PM CDT (03:45 UTC) Moonrise 7:15AMMoonset 9:16PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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 Lakeway, TX
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location: 30.35, -97.98     debug


Area Discussion for - Austin/San Antonio, TX
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Fxus64 kewx 260308
afdewx
area forecast discussion
national weather service austin san antonio tx
1008 pm cdt Sun jun 25 2017

Update
Showers and thunderstorms have generally dissipated across the area
aside from some light stratiform rain over portions of lee and
fayette counties that should dissipate over the next hour. Hi-res
models are generally in good agreement that additional convection
will not develop until possibly very late in the overnight hours
just before sunrise as some streamer showers and possibly a rogue
thunderstorm develops. Thus, we have removed rain chances over the
rio grande plains for most of tonight and decreased to 20-30 pops
elsewhere, only mentioning very isolated thunderstorms in the coastal
plains prior to 4 am. We have included 40 pops for scattered shower
activity across most of the CWA from 4-10 am just in case remnant
outflow boundaries with nearly moist adiabatic lapse rates allow for
some early development, but only very isolated thunderstorms are
expected due to stability near the melting level.

Scattered showers and thunderstorms are expected across most of the
region by late tomorrow morning into the afternoon hours, with the
best chances for storm initiation in the coastal plains along outflow
boundaries and a possible sea breeze. Convection should also develop
over the edwards plateau and western hill country counties along an
outflow boundary expected to be near or northwest of our northwest-
most counties associated with a complex of storms expected to move
southeast tonight from the texas panhandle. Depending on how far
southeast this activity makes it tonight, rain chances may need to be
increased later tomorrow afternoon and evening over much of the cwa
as additional shortwave forcing may help expand the coverage of
showers and thunderstorms along this particular outflow boundary.

Prev discussion issued 625 pm cdt Sun jun 25 2017
aviation... 00z update
vfr conditions will prevail this evening before MVFR CIGS develop in
the 08z-10z period. Kdrt will see MVFR CIGS developing around 12z.

MVFR CIGS will begin to lift and becomeVFR again between 16z-18z.

Winds will be east 5-10 knots tonight then E SE near 10 knots after
16z Monday. After 18z will begin to see scattered convection develop
and continue through sunset. With location and timing difficult to
determine at this point have gone ahead and included vcsh. Winds in
or near any convection will be variable and gusty.

Prev discussion... Issued 254 pm cdt Sun jun 25 2017
short term (tonight through Monday night)...

convective focus today has been largely controlled by a sharp
moisture gradient where deeper tropical moisture is being held east
of i-35 by circulation around a tutt low over the NW gulf. Low level
winds are mainly E or NE which has limited moisture advection for the
counties far inland. This has led to some over-forecasting of
precipitation for the western half, especially from the models
attempting to develop an unstable NW flow pattern with storms forming
over the high plains and moving south. Tonight's forecast initially
remains marked by shortwave ridging and no connection between the
tropical moisture and the monsoonal triggered convection to the
north. There is still small chance for a round of weakening storms to
arrive from the north late tonight, but a better low level moisture
advection pattern for daytime convection will set up as the effects
of the tutt low retreat east. Monday night is suggested to be the
best opportunity for high plains storms to move south into the area
given some mid-level dynamics dropping south. Nevertheless will
continue to undercut pops until synoptic scale models lose their
moist bias.

Long term (Tuesday through Sunday)...

Tuesday looks to be the last day for all areas to see rain potential
with deterministic runs showing mid level ridging to cut off the nw
flow pattern Tuesday evening. Pooled moisture over the coastal
prairies a weakness in the upper ridge over the gulf coast will
continue into Friday, so isolated to scattered mainly daytime
convection will continue over the same counties that received the
bulk of rains over the past day-and-a-half. Mid-level ridging
continues to steadily build, with no rain and increasing heat indices
expected next weekend.

Preliminary point temps pops
Austin camp mabry 73 88 72 90 72 40 40 30 40 10
austin bergstrom intl airport 72 88 71 89 72 40 40 30 40 10
new braunfels muni airport 72 88 71 89 72 40 40 30 40 10
burnet muni airport 70 85 70 87 70 40 40 30 40 10
del rio intl airport 74 92 73 92 74 30 30 30 30 10
georgetown muni airport 71 87 71 88 71 30 40 30 40 10
hondo muni airport 72 90 71 91 71 40 40 30 40 10
san marcos muni airport 72 88 71 89 72 40 40 30 40 10
la grange - fayette regional 73 88 72 90 73 40 50 30 50 20
san antonio intl airport 73 89 72 90 73 40 40 30 40 10
stinson muni airport 74 89 73 90 73 40 40 30 40 10

Ewx watches warnings advisories
None.

Mesoscale aviation... 10
synoptic grids... Lh
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, TX10 mi50 minENE 410.00 miMostly Cloudy78°F70°F79%1020.3 hPa
Austin City, Austin Camp Mabry, TX11 mi54 minESE 610.00 miPartly Cloudy79°F71°F77%1018.5 hPa
Austin-Bergstrom International Airport, TX20 mi52 minESE 510.00 miPartly Cloudy79°F73°F82%1018 hPa
Austin Executive Airport, TX22 mi50 minESE 810.00 mi75°F71°F89%1020 hPa
Horseshoe Bay Resort Airpark, TX24 mi50 minE 410.00 miMostly Cloudy78°F69°F75%1020 hPa

Wind History from RYW (wind in knots)
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Last 24hrE5NE4NE5E3NE6NE4N6N5NE5NE4NE4NE3NE7E7NE6E7
G15
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E8E7E6E4NE5NE5E4
1 day agoSE8S10
G16
S7S8S4S6S6SE5E3E7NE9NE7N10
G18
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E10SE9NE3E6NE6E6E7E3
2 days agoSE6S8
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S5S4S6S4S5S6S6S9S6S7SW6S8S7SW5
G15
SE9
G15
SE7SE8SE6SE6CalmSE7SE13
G20

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
east_satellite

GOES Local Image of SouthCentralPlains    EDIT
Geos

Wind Forecast for Austin/San Antonio, TX (23,6,7,8)
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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.