Saturday, October21, 2017 L-36.com


Marine Weather and Tides
Sunset Valley, 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 7:36AMSunset 6:54PM Saturday October 21, 2017 10:36 AM CDT (15:36 UTC) Moonrise 8:12AMMoonset 7:29PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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 Sunset Valley, TX
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location: 30.21, -97.8     debug


Area Discussion for - Austin/San Antonio, TX
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Fxus64 kewx 211138
afdewx
area forecast discussion
national weather service austin san antonio tx
638 am cdt Sat oct 21 2017

Aviation
Ifr CIGS have developed in the san antonio area while aus and drt are
MVFR. We expect CIGS to drop to ifr at aus and drt within the next
hour or two. CIGS should rise toVFR by early afternoon. A cold front
will move through the region overnight into Sunday morning. The front
will bring thunderstorms during the overnight hours which will reduce
conditions to MVFR for a couple of hours. Behind the front winds will
become northerly at 10 to 15 kts with gusts up to 25 kts.

Prev discussion issued 353 am cdt Sat oct 21 2017
short term (today through Sunday)...

a mid and upper level trough over the four corners region moves
across the rockies today to the high plains this evening. Surface low
pressure deepens maintaining a moist southerly lower level flow over
our area. Could see a few patches of light fog and drizzle this
morning, however chances are too low to mention. A streamer shower
band may set up along the highway 77 corridor and have slight chance
pops there today. Otherwise, airmass is too capped over our area.

Above normal temperatures are expected today.

The mid and upper level trough moves out across the central southern
plains tonight and Sunday. A dryline drifting east this evening may
generate showers and thunderstorms over the edwards plateau into the
hill country this evening and have low chance pops there. As the
trough moves further out into the plains, a cold front surges across
our area late tonight into Sunday morning. Models are in very good
agreement with only a 3 hour difference from fastest to slowest.

Expect it to enter the hill country in the predawn hours, cross the
i-35 highway 90 escarpment around or a little after sunrise, then
exit to the coastal plains by late morning. A line of showers and
thunderstorms is expected along the front. Moderate CAPE and shear
may allow a few of the storms to become strong to marginally severe
with strong wind gusts and hail the main threats. Due to the speed
of the front, only a brief heavy downpour is anticipated with the
stronger storms. In the wake of the front, a tight pressure gradient
brings breezy to gusty winds as surface high pressure builds into
our area along with much drier air allowing skies to clear.

Temperatures will drop in the morning after the frontal passage and
then recover to near normal in the afternoon with ample sunshine.

Long term (Sunday night through Friday)...

surface high pressure settles into our area Sunday night into Monday
with decreasing winds. An upper level trough dropping southeast out
of the canadian rockies merges with the plains trough by Tuesday with
the result an upper level ridge along the west coast and a long wave
trough along and east of the mississippi valley. The canadian trough
also sends another cold front across our area Monday night with a
reinforcing surge of high pressure bringing another round of breezy
to gusty winds on Tuesday. No rain is expected as no moisture return
is expected. The pattern aloft will continue through the remainder of
the week, although model disagreements develop by late week into next
weekend. The GFS has been consistent with the passage of an upper
level shortwave trough and cold front for next Friday, while the
ecmwf now shows the trough moving across the southern plains next
Saturday night with the frontal passage late next Saturday. For now,
will favor the GFS due to its consistency and have kept pops out of
the forecast. The ECMWF model brings pops next Saturday. Temperatures
will average below normal the entire week with well below normal lows
mid week.

Preliminary point temps pops
Austin camp mabry 86 66 78 51 81 10 80 50 0 0
austin bergstrom intl airport 87 66 78 49 81 10 80 50 0 0
new braunfels muni airport 88 67 79 50 81 10 80 50 0 0
burnet muni airport 84 60 75 48 80 10 90 20 0 0
del rio intl airport 85 63 82 52 83 - 40 - 0 0
georgetown muni airport 86 63 76 49 80 10 90 30 0 0
hondo muni airport 88 66 82 48 84 - 70 30 0 0
san marcos muni airport 87 67 78 49 82 10 80 50 0 0
la grange - fayette regional 87 68 78 50 79 20 60 70 0 0
san antonio intl airport 88 67 81 51 82 - 70 40 0 0
stinson muni airport 90 69 81 52 82 - 60 50 0 0

Ewx watches warnings advisories
None.

Mesoscale aviation... 05
synoptic grids... 04


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Austin-Bergstrom International Airport, TX7 mi43 minS 109.00 miMostly Cloudy76°F72°F88%1013.1 hPa
Austin City, Austin Camp Mabry, TX8 mi45 minVar 410.00 miMostly Cloudy77°F71°F82%1013.3 hPa
Austin Executive Airport, TX18 mi41 minS 610.00 miMostly Cloudy75°F73°F94%1014.6 hPa
Lago Vista TX, Rusty Allen Airport, TX22 mi61 minS 710.00 miOvercast74°F70°F90%1014.6 hPa
San Marcos, San Marcos Municipal Airport, TX22 mi40 minSSW 910.00 miMostly Cloudy76°F71°F85%1013.4 hPa

Wind History from AUS (wind in knots)
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Last 24hrNW3Calm3CalmS5SE9S9S6S3SW3E5SE7SE8SE8SE7S5S9S5S4S5S5S7S8S10
1 day agoNE3Calm4E7E4SE7SE5SE9SE5SE4SE8S4E3SE5CalmCalmCalmCalmCalmN3NE4E5NE7Calm
2 days agoS4S7S7S8
G14
4SE5SE6S6S3CalmCalmCalmCalmCalmCalmS4CalmCalmCalmCalmCalmCalmCalmNE3

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 (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.