Sunday, August20, 2017 L-36.com


Marine Weather and Tides
George, 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 8:07PM Sunday August 20, 2017 10:18 AM CDT (15:18 UTC) Moonrise 4:43AMMoonset 6:30PM Illumination 3% Phase: Waning Crescent; Moon at 28 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 George, TX
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location: 30.67, -97.65     debug


Area Discussion for - Austin/San Antonio, TX
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Fxus64 kewx 201115
afdewx
area forecast discussion
national weather service austin san antonio tx
615 am cdt Sun aug 20 2017

Aviation discussion For 12z TAF period...

sporadic MVFR CIGS have been noted on satellite in the vicinity of
the san antonio terminals as expected this morning. This deck has
spread far enough north to briefly impact kaus as well. However,
latest trends already show scattering of this deck and as a result,
only continue the MVFR tempo for san antonio through the first hour
of the taf. Other than that,VFR conditions are expected to prevail
through the next 18 hours. Some model indications hint at MVFR
development again towards daybreak tomorrow but have kept this out of
the TAF for now as confidence is low.

Prev discussion issued 430 am cdt Sun aug 20 2017
short term (today through Monday)...

the subtropical ridge axis is currently centered over south central
texas according to 20 00z upper air observations as well as recent
water vapor satellite imagery. Satellite data also shows an axis of
higher moisture across the central gulf, with precipitable water
values around 2".

The above mentioned ridge axis will remain intact today, bringing
another round of above normal temperatures and dry weather to the
region. Afternoon heat index values for the rio grande plains and
along and east of i-35 should top out in the 102-107 degree range
today. In addition, a few locations east of i-35 may briefly reach
108 degrees. We will mention elevated heat index values in a special
weather statement and encourage heat safety given the continued
above normal temperatures.

On Monday, an axis of higher moisture will begin to spread across
south texas in advance of a tutt low. The increased moisture and
daytime heating should be enough to generate mainly isolated
convection during the late afternoon and early evening hours. Most of
the convection is expected to remain east of the i-35 corridor.

However, some of the hi-res models do show the possibility a few
cells could reach the i-35 corridor. For now, we will keep rain
chances east of i-35 and continue to monitor model trends. The
increase in moisture will also keep elevated heat index values over
the region on Monday.

Long term (Monday night through Saturday)...

the main feature of interest for the early portion of the work week
will be an approaching tutt low. The short range models generally
agree in weakening this low as it encounters a stout subtropical
ridge axis. For now, we will keep rain chances confined to the
coastal plains on Tuesday and go with a dry forecast elsewhere. The
weather pattern appears to become a little more active as we head
into the middle and latter portion of this week. The medium range
models agree in showing a slightly more active northerly flow aloft
in the mid and upper levels, but differ on rain chances across the
region. It does appear the northerly flow aloft will aid in a weak
cold front moving into north texas early Thursday. The southward
progression of this front remains in question and will likely be
dominated by how much convection develops along and behind the
boundary. The ECMWF continues to show a better chance for
precipitation, while the GFS is not as optimistic. While we do expect
an uptick in precipitation, suspect the ECMWF mos guidance numbers
are too high. We will generally keep rain chances in the 20-40% range
for Wednesday through Saturday and adjust as needed. In addition to
rain chances, we should see a gradual easing of high temperatures
closer to climatological normals beginning Thursday. Finally, the
remnants of harvey are expected to emerge over the bay of campeche
on Thursday and will add to the forecast difficulty for late this
week.

Preliminary point temps pops
Austin camp mabry 102 77 98 76 99 - - 10 10 10
austin bergstrom intl airport 100 75 97 75 98 - - 10 10 10
new braunfels muni airport 99 75 97 75 98 0 0 10 10 10
burnet muni airport 96 73 95 73 95 - 0 10 - 10
del rio intl airport 101 77 100 78 100 0 0 - 0 10
georgetown muni airport 98 75 96 75 97 - - 10 10 10
hondo muni airport 100 74 98 74 99 0 0 - - 10
san marcos muni airport 100 75 98 75 99 0 0 10 10 10
la grange - fayette regional 99 76 98 76 98 - - 30 10 20
san antonio intl airport 99 76 96 76 97 0 0 10 - 10
stinson muni airport 99 76 97 76 98 0 0 10 - 10

Ewx watches warnings advisories
None.

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


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Georgetown, Georgetown Municipal Airport, TX3 mi23 minSSW 510.00 miFair84°F71°F65%1016.7 hPa
Austin Executive Airport, TX19 mi24 minSSW 510.00 miFair84°F71°F66%1016.9 hPa
Lago Vista TX, Rusty Allen Airport, TX21 mi44 minSW 610.00 miFair82°F71°F72%1017.6 hPa

Wind History from GTU (wind in knots)
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Last 24hrSW95345SE9E55S3E4E3Calm3S7S10
G14
S8S7S10SW6SW5SW3SW4SW8S5
1 day agoSW12S8SW10S10SW7NE3Calm3SE4SE3SE4SE3SE4S8S12S9S10S6S9SW5SW5S6SW7SW6
2 days agoS14
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S9S5S5CalmN15N6CalmSE5CalmS9S12
G15
S6S9S7S9--S11SW11

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 (11,2,3,4)
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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.