Saturday, January18, 2020
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Marine Weather and Tides
Terrell Hills, TX

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 7:27AMSunset 6:01PM Saturday January 18, 2020 5:06 PM CST (23:06 UTC) Moonrise 1:35AMMoonset 1:07PM Illumination 37% Phase: Third Quarter Moon; Moon at 23 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 Terrell Hills, TX
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location: 29.46, -98.46     debug


Area Discussion for - Austin/San Antonio, TX
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FXUS64 KEWX 182031 AFDEWX

Area Forecast Discussion National Weather Service Austin/San Antonio TX 231 PM CST Sat Jan 18 2020

SHORT TERM (Tonight through Sunday Night). The cold front has just about cleared the far southern CWA and will continue south through the remainder of the afternoon. Residual showers across the southeastern counties of the CWA will gradually come to an end, with clearing across the remainder of the southern and eastern CWA also taking place through the afternoon and evening. Gusty north winds at times will continue through the afternoon. While wind speeds will weaken slightly tonight, they won't completely de-couple. Therefore despite a clear and colder night, mixing should prevent temperatures from reaching freezing, with the exception of the northern Hill Country. Elsewhere lows in the mid 30s to low 40s are forecast. Mostly sunny but cool conditions on Sunday. Highs in the mid 50s to around 60 are forecast.

Winds are forecast to de-couple Sunday night and combined with the dry airmass in place should result in colder temperatures than tonight. We are currently forecasting low temperatures Monday morning in the upper 20s to low 30s in some drainage areas of the Hill COuntry and east of I-35/north of I-10 with mid to upper 30s elsewhere. The one thing to watch that could influence the temperature forecast warmer may be a quicker arriving and thicker mid level deck of clouds that is indicated to possibly develop across the western half of the CWA.

LONG TERM (Monday through Saturday). The upper high behind this weekend's cold front will shift east across Texas during the day on Monday which will cause surface winds to become more easterly. With the cool airmass in place temperatures both Monday and Tuesday will continue to run a good 5 to 7 degrees below normal, finally feeling like winter after several warm days.

A large upper trough with embedded shortwaves will approach late Tuesday and interact with the increasing moisture across South Central Texas due to the southerly return flow and produce showers across the Rio Grande Plains into the Edwards Plateau. With the large trough across the Central Plains the shortwaves in the larger scale pattern will move across Texas Tuesday night through Wednesday night. This appears to be the window for the best rain chances across the area. The shortwaves exit during the day on Thursday concentrating rain chances across eastern areas of South Central Texas. The large scale trough finally drops into the Central Plains late Thursday into Friday which will drag a cold front through the area Friday morning clearing out precipitation. Temperatures that had warmed into the upper 60s on Thursday due to the increased moisture will moderate behind the front Friday and Saturday to near normal (in the low 60s). All-in-all models have around an inch of rain for most of the area for the middle to late part of next week. The GFS continues to be the most progressive of the models and is weakest with the trough producing the lowest QPF of the 3 main global models. The ECMWF and Canadian are both much wetter, deeper, and stronger with as much as 2 inches along and east of Interstate 35 before the rain ends on Friday. With the trough still in the days 4-6 time frame we will see if models come to a consensus over the next 24-36 hours. Precipitation through the period will be mostly showers, but a few isolated thunderstorms will be possible, especially in the Wednesday to Thursday time frame.

PRELIMINARY POINT TEMPS/POPS. Austin Camp Mabry 38 57 35 56 38 / 0 0 0 0 0 Austin Bergstrom Intl Airport 37 57 32 58 36 / 0 0 0 0 0 New Braunfels Muni Airport 38 57 34 58 37 / 0 0 0 0 0 Burnet Muni Airport 34 54 33 55 36 / 0 0 0 0 0 Del Rio Intl Airport 39 60 39 57 42 / 0 0 0 0 0 Georgetown Muni Airport 35 55 34 56 37 / 0 0 0 0 0 Hondo Muni Airport 39 60 32 59 38 / 0 0 0 0 - San Marcos Muni Airport 38 57 31 58 36 / 0 0 0 0 0 La Grange - Fayette Regional 39 57 32 58 37 / 0 0 0 0 0 San Antonio Intl Airport 40 58 37 57 40 / 0 0 0 0 0 Stinson Muni Airport 41 59 37 58 41 / 0 0 0 0 -

EWX WATCHES/WARNINGS/ADVISORIES. None.

Short-Term/Aviation . Runyen Long-Term . Treadway Decision Support . YB


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Antonio, San Antonio International Airport, TX6 mi16 minN 1310.00 miA Few Clouds68°F41°F38%1021.2 hPa
San Antonio - Kelly Field, TX8 mi11 minN 1410.00 miFair69°F43°F41%1021.3 hPa
San Antonio, Stinson Municipal Airport, TX9 mi14 minNNE 10 G 1810.00 miPartly Cloudy67°F44°F44%1021.3 hPa
Randolph Air Force Base, TX11 mi11 minNNE 11 G 1710.00 miOvercast67°F43°F43%1022.2 hPa
Castroville Municipal Airport, TX22 mi32 minN 1410.00 miFair72°F44°F37%1022.7 hPa
San Antonio Boerne Stage Field, TX22 mi32 minN 10 G 1610.00 miFair63°F41°F45%1023.4 hPa

Link to 5 minute data for KSAT

Wind History from SAT (wind in knots)
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Last 24hrSE10SE9SE5SE5SE5S9S8S7S6S5CalmN4SE3CalmCalmCalmNW5N9N14
G20
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1 day agoNE6NE8NE5NE5NE5N43NE4NE3CalmE5E3E5E3E5E7SE11SE13SE13S11SE9S13
G23
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2 days agoSE7CalmSE11E9E5SE11SE4E4E5E5E5E6E7E6E10E10E14E13E11NE8N10N9N7NE7

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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wmap_A
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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 (18,4,5,8)
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Ground Weather Radar Station Austin/San Antonio, TX
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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 numerous 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.