Saturday, August19, 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 6:59AMSunset 8:09PM Saturday August 19, 2017 5:59 AM CDT (10:59 UTC) Moonrise 3:41AMMoonset 5:41PM Illumination 8% 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 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 190844
afdewx
area forecast discussion
national weather service austin san antonio tx
344 am cdt Sat aug 19 2017

Short term (today through Sunday)
Continued influences of a stubborn hot air mass continue today and
tomorrow. Highs again right around 100 degrees for much of the i-35
corridor with heat indices ranging from 101-108. The higher end of
these values will be seen again in the southeast zones. Surface winds
are expected to remain southerly and southeasterly today as a surface
high is located over the louisiana coast.

Over the last couple days, isolated showers and storms have developed
despite all clear indications from cams and other short range models.

Again this morning the hi-res suite shows the area shower-less,
however GFS and ecwmf deterministic produce isolated showers again to
the northwest. Looking at forecast soundings across the area, parcels
will be struggling against a pretty dry column and an unfavorable
wind profile above 600 mb. As a result, still feel that a dry
forecast is the right call, but did include 10 pops along the
southeast and northwest zones for the afternoon.

Long term (Sunday night through Friday)
A pattern change looks to be on the horizon beginning mid week as a
tutt low traverses the gulf of mexico, moving west. This will bring
at first, welcome relief of 2-3 degrees in MAX t, then an uptick in
pop chances as the low pushes west of the cwa. This pattern has been
pretty consistently advertised now in mid range models.

The more notable feature comes late week as a frontal passage is
progged to push south and into texas Wednesday night through Friday.

At the moment, the 00z GFS deterministic solution is significantly
more dry than its ECMWF counterpart. With the ridge centered over
northern mexico, whatever convection occurs with the frontal passage
should be able to push far enough south to bring showers at least to
the northern zones late Wednesday night into Thursday morning. The
question will be how far south? The GFS solution stalls the front
along our northeast border with hgx fwd but with 850 mb flow parallel
to the boundary, could result in some locally heavy rainfall.

Additionally, the nose of the 850 mb LLJ would intrude nicely into a
2+" pwat environment along the stalled boundary... So if this solution
comes to fruition, could result in some meaningful rain for the
northern i-35 corridor, perhaps extending as far south as williamson
county.

Come Friday, gfs ECMWF canadian all develop some sort of tropical
disturbance off the yucatan and pushes it quickly north along the
mexican coastline, coming on shore just south of brownsville. If so,
this would put the southern half of the state under a very rich
moisture regime for next weekend, possibly leading to more heavy
rainfall chances. More to come on this with more model evolution.

Preliminary point temps pops
Austin camp mabry 101 77 100 77 98 0 0 0 0 10
austin bergstrom intl airport 99 76 99 76 98 0 0 0 0 10
new braunfels muni airport 101 75 100 75 98 0 0 0 0 10
burnet muni airport 97 73 97 73 95 0 0 0 0 10
del rio intl airport 101 78 102 78 99 10 0 0 0 0
georgetown muni airport 98 75 98 75 97 0 0 0 0 10
hondo muni airport 101 74 101 74 99 0 0 0 0 -
san marcos muni airport 100 75 100 75 98 0 0 0 0 10
la grange - fayette regional 100 76 100 76 97 10 0 10 0 20
san antonio intl airport 99 76 99 76 98 0 0 0 0 10
stinson muni airport 101 76 99 76 97 0 0 0 0 10

Ewx watches warnings advisories
None.

Mesoscale aviation... 24
synoptic grids... Tb3


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lago Vista TX, Rusty Allen Airport, TX10 mi84 minSSW 810.00 miFair78°F70°F77%1016.9 hPa
Austin City, Austin Camp Mabry, TX11 mi68 minVar 410.00 miFair79°F73°F82%1014.8 hPa
Austin-Bergstrom International Airport, TX20 mi66 minS 510.00 miPartly Cloudy76°F73°F91%1014.7 hPa
Austin Executive Airport, TX22 mi64 minN 010.00 miMostly Cloudy75°F73°F94%1016.6 hPa
Horseshoe Bay Resort Airpark, TX24 mi84 minN 010.00 miFair78°F68°F73%1016.3 hPa

Wind History from RYW (wind in knots)
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Last 24hrS8SW5S5S7
G14
SW5SW8SW7
G14
SW4SW3CalmSE4CalmE6SE5SE3S3SE4SE9S8S5S6S6SW6SW4
1 day agoSW10
G17
SW5S7S8SW8
G15
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SW6S8S10
G14
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G18
S4S5S4S4N10
G17
NE9E3S4S4S6S7S6S5
2 days agoS7
G14
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G19
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SE4S6S7S6SE9
G16
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G20
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G15
S9S11S8S10
G15
S10
G16

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 (6,6,7,8)
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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.