Thursday, October21, 2021
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Marine Weather and Tides
Lexington, TX

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:35AMSunset 6:53PM Thursday October 21, 2021 3:29 PM CDT (20:29 UTC) Moonrise 6:40PMMoonset 7:25AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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 Lexington, TX
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location: 30.41, -97     debug


Area Discussion for - Austin/San Antonio, TX
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FXUS64 KEWX 211942 AFDEWX

Area Forecast Discussion National Weather Service Austin/San Antonio TX 242 PM CDT Thu Oct 21 2021

SHORT TERM (Tonight through Friday Night).

A decently complex setup is in place for the short term despite the forecast generally being dry and warm. A cold front is situated just to the north of our area this afternoon. Based on surface observations and the 15z WPC frontal analysis the front is roughly stalled from San Angelo to Temple to Palestine. Across West Texas a dryline may spark off some thunderstorms through the evening and overnight hours. On top of those features a weak shortwave moving trough the zonal flow aloft produced a few showers earlier in the day across Val Verde and Edwards County. These showers are now moving through Mason and San Saba County and could impact some folks in Llano and Burnet county through the late afternoon. All of these showers are generally light, and while a rumble of thunder is possible, it is unlikely. Partly to mostly cloudy skies have hung on through the afternoon with temperatures in the low to mid 80s.

As discussed in the morning short term AFD there are a few questions about whether convection across West Texas (Davis Mountains) and Mexico (Sierras del Burro) from the dryline and orographic influences will make it east into our Rio Grande Plains. Some of the high resolution models hint it is possible, but think that most areas will stay dry so have only included a sliver of 20% PoPs for these areas. Equally, some of the synoptic models show additional showers developing along the front tonight as it attempts to sag south into some of our Hill Country counties. The overwhelming majority of the high resolution models keep the Hill Country dry this evening and into the overnight so have left the forecast dry overnight with lows dropping into the mid to low 60s.

The front is forecast to lift back north as a warm front on Friday. Warm, humid southeasterly flow will prevail Friday. With this moist atmosphere surging back northward another round of morning fog is possible across the Coastal Plains as well as low lying areas of the Hill Country. Think any shower activity will remain close to the coast during Friday afternoon so a warm (mid to upper 80s) and dry forecast will hold out for Friday.

LONG TERM (Saturday through Thursday).

The upper level pattern this weekend remains of a nearly zonal flow but an occasional subtle disturbance or ripple within the flow may be possible. Shortwave ridging then builds over the region from Monday into early Tuesday. At the surface, winds will remain light to moderate out of the south and southeast. Combination of these features will result in continued above average temperatures. High temperatures may approach the daily record highs Monday and again Tuesday for some locations. The afternoon heat indices, with the elevated dew points, are expected to peak in the mid to upper 90s. While rainfall looks slim across the majority of the region into Tuesday, the far eastern portions of the area along highway 77 do have the chance for isolated showers and/or a thunderstorm this weekend. Otherwise, anticipate low morning clouds each day before scattering out into or through the afternoon.

Midweek will continue to focus on an upper level trough advancing out of the western US. Latest models, including the last 2 runs of the GFS, are more progressive and a bit flatter with the trough as it moves across the CONUS. While uncertainty does still exist, any tropical moisture from the eastern Pacific that the recent runs of the GFS are picking up, quickly advances eastward given the more progressive nature of the trough. Otherwise, this parent trough allows for a Pacific front to move across the region into or during the day on Wednesday. The front could yield to some small chances for rain along and east of highway 281. Temperatures for Wednesday may be tricky depending on the timing of the surface front as the most recent 12Z GFS run came in a bit weaker and slower with the boundary, resulting in some rather strong compressional heating across portions of the area. With these hotter temperatures being more of an outlier solution among the guidance, I elected to trend only a tad warmer compared to the NBM. Breezy northwest winds and building surface high pressure behind the front is to bring a much drier airmass. Temperatures should also drop closer to seasonable average.

PRELIMINARY POINT TEMPS/POPS. Austin Camp Mabry 65 84 68 86 69 / 10 - 0 10 - Austin Bergstrom Intl Airport 64 84 66 84 67 / 10 - 0 10 - New Braunfels Muni Airport 64 84 66 85 67 / - - - 10 - Burnet Muni Airport 64 82 65 84 67 / 10 - 0 - - Del Rio Intl Airport 67 87 68 91 70 / 20 - - - - Georgetown Muni Airport 64 84 66 85 68 / 10 - 0 - - Hondo Muni Airport 64 85 65 87 68 / - - - - - San Marcos Muni Airport 64 84 65 85 67 / - - 0 10 - La Grange - Fayette Regional 67 86 68 86 69 / - 10 - 20 10 San Antonio Intl Airport 66 83 68 85 69 / - - - 10 - Stinson Muni Airport 67 86 69 87 70 / - - - 10 10

EWX WATCHES/WARNINGS/ADVISORIES. None.

Short-Term/Aviation . Treadway Long-Term . Brady Decision Support . Platt


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Giddings, Giddings-Lee County Airport, TX17 mi34 minN 010.00 miMostly Cloudy82°F66°F58%1019.6 hPa
Caldwell, Caldwell Municipal Airport, TX17 mi34 minN 310.00 miMostly Cloudy85°F66°F53%1019.3 hPa

Link to 5 minute data for KGYB

Wind History from GYB (wind in knots)
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Last 24hrNE300000000000000N30N4N30E6NE300
1 day agoS7SE6SE6SE30SE4SE4SE4SE4000000000NE3E400NE3N3
2 days agoSE5SE5S4000SE3S3000000SE300SE5SE6SE6S7S8SE7S8

Tide / Current Tables for
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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