Sunday, December15, 2019
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Marine Weather and Tides
Sunset Valley, TX

Version 3.4 		NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen
Sunrise 7:18AMSunset 5:33PM Sunday December 15, 2019 4:16 AM CST (10:16 UTC) Moonrise 9:14PMMoonset 10:27AM Illumination 86% Phase: Waning Gibbous; Moon at 18 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 150936 AFDEWX

Area Forecast Discussion National Weather Service Austin/San Antonio TX 336 AM CST Sun Dec 15 2019

SHORT TERM (Today through Monday). Surface analysis early this morning shows a nearly stationary frontal boundary draped along a Lubbock-Austin-Galveston line. Modest moisture return in the vicinity of this boundary is resulting in the development of low stratus and patchy fog across the Coastal Plains as of 3 AM. With VAD wind profilers from KEWX, KGRK, and KHGX all showing a stout 40 knot southwesterly low level jet overriding this boundary, expect it to lift north as a warm front through the remainder of the morning hours. As warmer, more moist air spreads into Central Texas with the boundary, expect to see at least some fog and possibly lower clouds make a run for the Interstate 35 corridor after sunrise. Daytime heating will result in stratus and fog mixing out by late morning.

Above the surface, zonal mid-level flow across the southern states will transition to more of a southwest flow aloft today as a shortwave trough approaches from the West Coast. Height falls ahead of this disturbance are expected to result in the development of a surface low along the warm front as it nears the Red River today, which will drag the frontal boundary south towards the region as a cold front tonight and dislodge colder air across the Great Plains as it does. Ahead of this frontal boundary, veering/downsloping low- level winds across the Edwards Plateau, Hill Country, and Central Texas will allow for another very warm afternoon with many locations nearing or setting new record high temperatures today. A listing of record high temperatures is appended in the Climate section below with much of the region again climbing into the 80s to near 90 again today.

These warmer temperatures will be short-lived, however, as the front moves into South Central Texas by sunrise Monday and clears the region by noon with thin bands of light rain showers developing along the front as it moves south. Fog and patchy drizzle or light rain may also develop along and east of the Interstate 35 corridor ahead of the front's arrival early Monday morning, but will lift as the front sweeps south through the remainder of the morning hours. Cold air advection with breezy north winds behind the front will result in highs 20-25 degrees cooler than today in the Hill Country and Central Texas. Expect morning temperatures to range from the mid 40s north to low 60s south, reaching the mid 50s to mid 70s during the afternoon.

LONG TERM (Monday Night through Saturday). Colder, drier, and clear conditions settle into the region Monday night. Lows in the 30s and low 40s will only rise into the 50s during the afternoon Tuesday. Breezy northerly winds behind the front Monday night will gradually diminish during the day Tuesday as surface ridging builds into the region. This will allow for excellent conditions for radiational cooling Tuesday night and Wednesday morning with all of South Central Texas expected to see temperatures at or below freezing Wednesday and again Thursday morning.

A brief period of shortwave ridging on Thursday is replaced by a quickly moving wave from the Pacific on Friday. As a result, highs in the mid 50s on Wednesday will moderate into the mid 50s to mid 60s by Thursday afternoon with dry conditions persisting. Weak moisture return ahead of the Friday trough may allow for a few showers to develop across the Coastal Plains on Friday, but precipitable water values barely exceeding one inch and drier air behind a cold front associated with this wave indicates any window for this would be brief. Ridging returns next weekend behind Friday's system with dry and mild conditions resuming.

CLIMATE. Near record to record high temperatures are forecast across South Central Texas today. A listing of records for the region's official climate sites for December 15 is provided below.

LOCATION RECORD HIGH (YEAR) Austin Bergstrom 81 (1995) Austin Camp Mabry 82 (1924) San Antonio 85 (1950) Del Rio 84 (1950)

PRELIMINARY POINT TEMPS/POPS. Austin Camp Mabry 82 54 61 35 53 / - 20 20 0 0 Austin Bergstrom Intl Airport 82 54 63 35 54 / - 20 20 0 0 New Braunfels Muni Airport 83 56 67 35 54 / - 20 20 0 0 Burnet Muni Airport 84 46 58 32 51 / 0 10 - 0 0 Del Rio Intl Airport 88 52 72 38 56 / 0 0 0 0 0 Georgetown Muni Airport 83 50 57 34 52 / 0 20 20 0 0 Hondo Muni Airport 84 52 74 35 58 / 0 - - 0 0 San Marcos Muni Airport 82 56 66 35 54 / - 20 20 0 0 La Grange - Fayette Regional 82 62 67 37 53 / 10 30 30 0 0 San Antonio Intl Airport 82 58 68 38 54 / - 10 10 0 0 Stinson Muni Airport 83 59 72 38 55 / - 10 10 0 0

EWX WATCHES/WARNINGS/ADVISORIES. None.

Aviation . Treadway Short-Term/Long-Term . Huffman

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Austin-Bergstrom International Airport, TX7 mi24 minN 05.00 miFog/Mist42°F39°F92%1007.2 hPa
Austin City, Austin Camp Mabry, TX8 mi26 minN 07.00 miFair51°F46°F86%1006.9 hPa
Austin Executive Airport, TX18 mi22 minSSW 52.00 miFog/Mist50°F50°F100%1007.4 hPa
San Marcos, San Marcos Municipal Airport, TX22 mi21 minN 010.00 miFair44°F42°F93%1007.3 hPa
Lago Vista TX, Rusty Allen Airport, TX22 mi22 minS 510.00 miFair57°F46°F67%1007.4 hPa

Link to 5 minute data for KAUS

Wind History from AUS (wind in knots)
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Last 24hrW3CalmCalmCalmCalmNE4CalmE4SE6S6SE9S9S8SE3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoCalmCalmCalmCalmS7SW9W8SW7W7
G18		6NW10W8NW3CalmCalmCalmCalmCalmW3CalmW3CalmW3Calm
2 days agoCalmW3CalmCalmCalmCalmCalmS7S7S8S9S10S9CalmCalmCalmS3W3CalmSW5S3S5CalmCalm
Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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wmap_A
GEOS Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Austin/San Antonio, TX (5,6,7,8)
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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.