Sunday, September27, 2020
Privacy Policy
L-36.com

Marine Weather and Tides
Sunset Valley, TX

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:21AMSunset 7:22PM Sunday September 27, 2020 1:35 AM CDT (06:35 UTC) Moonrise 4:28PMMoonset 2:24AM Illumination 75% Phase: Waxing Gibbous; Moon at 10 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
    EDIT      (on/off)   Help


7 Day Forecast for Marine Location Near Sunset Valley, TX
   Hourly   EDIT   Help
location: 30.21, -97.8     debug


Area Discussion for - Austin/San Antonio, TX
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS64 KEWX 270523 AFDEWX

Area Forecast Discussion National Weather Service Austin/San Antonio TX 1223 AM CDT Sun Sep 27 2020

AVIATION. Patchy MVFR ceilings starting to build in over the I-35 corridor and currently impacting AUS. Amending AUS to a bkn 1500ft for this and may need to amend SAT in the next hour or two. Ceilings are expected to further lower to IFR early this morning. Some areas of dense fog have developed the last two night but winds are stronger out of the south tonight than previous nights so expect less coverage of patchy fog and for this reason have not included mention in this TAF package. Tomorrow, ceilings scatter out late morning and southerly winds pick up as sfc pressure gradient across the state tightens. A strong front looks to push through just at the end of this TAF period and have only indicate the wind shift for AUS at this time.

PREV DISCUSSION . /ISSUED 106 PM CDT Sat Sep 26 2020/

SHORT TERM (Tonight through Sunday Night) .

The morning status clouds held on into the early afternoon hours with a decent coverage of clouds still in place across South-Central Texas. Should see plenty of breaks for the sun to warm up things into the upper 80s to lower 90s across the area today. For tonight, another return of clouds is expected, but forecast soundings favor just cloud cover over fog as the boundary layer is expected to remain somewhat mixed. Lows tonight will stay warmer than the past several nights, generally in the lower 70s across the region.

The dry weather should continue into Sunday as breezy conditions commence ahead of a changing weather pattern. A deep trough is expected to be pushing into the Central Plains tomorrow with a surface low deepening over Northwest Texas. This should allow southerly winds tomorrow to be in the 10-15 mph range with gusts up to 25 mph expected. This system will send in a cold front into the area after midnight Sunday night. Breezy northerly flow, cooler temperatures, and a slight chance of a shower will accompany the front as it makes it just east of the I35 corridor around sunrise Monday.

LONG TERM (Monday through Saturday) .

An active Monday is in store as a highly amplified upper air pattern will bring the aforementioned strong fall cold front through the area to begin the long term period. The remainder of the week looks quiet and rather nice.

Models are in surprisingly good agreement that at 12Z Monday the front will be draped across the region, with the current forecast depicting it's location from approximately Eagle Pass to just south of San Antonio to Giddings. Thus, some locations may see their high for the day just after midnight. Daytime temperatures look to max out in the 70s and lower 80s. Although a few models do keep portions of the Hill Country in the 60s through the day, thinking that sunshine should be able to prevent that.

Ample dry air aloft will keep precipitation chances nil across the majority of the region, however a few showers and perhaps a thunderstorm will be possible mainly east of I-35/I-37. Could also see some isolated showers develop along our southern tier of counties as well, though lower chances exist there. Any activity will more than likely end prior to 18Z.

The more impactful weather on Monday will be the post-frontal northerly winds, likely to top out in the 20-30 mph range with gusts potentially as high as 40 mph. A Wind Advisory may be needed. in terms of fire weather concerns, RH values will bottom out in the mid 20s in the northwest portions of our area in the afternoon, and the highest winds/gusts should be in the morning in that region. A Red Flag warning is unlikely, but conditions will still be near- critical. Winds will quickly diminish through the evening hours. Tuesday through Thursday RH will drop into the teens across the west half of the CWA, but winds aren't expected to be much of an issue, relaxing to near or below 10mph.

High pressure will then take over for much of the week with a gradual warming trend bringing highs back into the 80s and low 90s Wednesday and Thursday. A second, weaker cold front will push across the region in the Thursday-Thursday night timeframe as an even stronger high builds from the Canadian Prairies into the Plains. The upper air pattern is showing no signs of de-amplification prior to next weekend.

PRELIMINARY POINT TEMPS/POPS. Austin Camp Mabry 91 63 76 56 79 / 0 20 20 0 0 Austin Bergstrom Intl Airport 91 65 77 55 79 / 0 20 20 0 0 New Braunfels Muni Airport 91 68 77 56 80 / 0 10 20 0 0 Burnet Muni Airport 89 61 74 52 79 / 0 20 10 0 0 Del Rio Intl Airport 99 66 82 54 84 / 0 0 - 0 0 Georgetown Muni Airport 90 63 76 54 79 / 0 20 20 0 0 Hondo Muni Airport 97 68 82 54 85 / 0 - - 0 0 San Marcos Muni Airport 91 67 77 55 79 / 0 10 20 0 0 La Grange - Fayette Regional 91 68 79 56 80 / 0 10 30 - 0 San Antonio Intl Airport 94 68 80 57 82 / 0 10 10 0 0 Stinson Muni Airport 94 69 80 57 82 / 0 - 10 0 0

EWX WATCHES/WARNINGS/ADVISORIES. None.

Short-Term/Aviation . EWilliams Long-Term . Runyen


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Austin-Bergstrom International Airport, TX7 mi42 minS 1010.00 miMostly Cloudy76°F73°F91%1009.1 hPa
Austin City, Austin Camp Mabry, TX8 mi44 minVar 510.00 miMostly Cloudy77°F71°F82%1009.2 hPa
Austin Executive Airport, TX18 mi40 minS 6 miOvercast75°F71°F89%1010.8 hPa
San Marcos, San Marcos Municipal Airport, TX22 mi39 minSSE 510.00 miMostly Cloudy75°F73°F96%1010 hPa
Lago Vista TX, Rusty Allen Airport, TX22 mi40 minS 9 G 1610.00 miOvercast74°F70°F90%1011.2 hPa

Link to 5 minute data for KAUS

Wind History from AUS (wind in knots)
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
Last 24hrSW3CalmCalmCalmCalmCalmCalmE3S8S8S10S12
G17
S9
G18
S11S10S9SE8S7S5SE8SE8S9S10S10
1 day agoCalmCalmW3W3CalmCalmCalmSW4CalmSW5SW444CalmCalmS5S3SE5SE3S3CalmCalmCalmSE4
2 days agoN5N10N4N4N4N3CalmNW4N6N7N11N7NW8N5N8NE6E6E5E3CalmCalmCalmCalmCalm

Tide / Current Tables for
   EDIT   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map
       (on/off)   Help Weather Map
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
Ground Weather Radar Station Central Texas
   (on/off)   Help
weather_mapweather_map weather_map


Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. Google supplies the ads on this site. Because I do not track who you are, I cannot customize how these ads are served. They may be personalized to improve the ad experience. If you do not want personalized ads, please adjust the settings on the Google site HERE.
. NOTE: The best I can determine, this site is not subject to CCPA but I am doing my best to comply anyway. 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.