Thursday, April22, 2021
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Marine Weather and Tides
Sunset Valley, TX

Version 3.4
NOTICE
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 6:54AMSunset 8:04PM Thursday April 22, 2021 8:53 AM CDT (13:53 UTC) Moonrise 2:24PMMoonset 3:16AM Illumination 81% 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
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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 221131 AFDEWX

Area Forecast Discussion National Weather Service Austin/San Antonio TX 631 AM CDT Thu Apr 22 2021

AVIATION. MVFR CIGs have moved over KDRT/KSAT/KSSF and will spread to KAUS in the next few hours on easterly winds at 6 to 12 KTs. KDRT may have a brief period of IFR CIGs late morning and have gone with TEMPO there. Winds become southeasterly at 10 to 17 KTs by midday. CIGs lower to IFR this evening, then LIFR overnight, especially at KSAT/KSSF, on southeasterly winds of 7 to 12 KTs. Patchy -RADZ and ISOLD SHRA are possible today into tonight. However, have left mention out for today as PROBs are low. Have mentioned for the I-35 sites tonight into Friday as PROBs are slightly higher.

PREV DISCUSSION. /ISSUED 337 AM CDT Thu Apr 22 2021/

SHORT TERM (Today through Friday) . Lower level moisture is beginning to return up the Rio Grande on southeasterly flow. This flow gradually expands over the remainder of South Central Texas today allowing the lower levels to moisten. Weak isentropic lift will develop as the low level jet strengthens generating a mix of patchy drizzle, light rain, and isolated showers along the Rio Grande early this morning, then spreading north and east today into tonight. Rainfall amounts will be very light, generally only a few hundredths of an inch, at best. Strong capping will inhibit thunderstorm development, however, cannot rule out an isolated thunderstorm by Friday morning as a weak mid level impulse approaches. The thickening cloud cover will keep high temperatures well below normal today and have gone cooler than the blended guidances. Southeasterly flow will warm low temperatures tonight to above normal with some areas seeing rising temperatures after midnight.

The mid level impulse moves over our area Friday morning to increase upward forcing of an unseasonably moist airmass. Showers will become more widespread. Isolated thunderstorms are possible as the morning progresses due to increasing elevated instability and weakening of the capping. A dryline will move east into our area late morning and afternoon as an upper level trough approaches. Upward forcing continues to strengthen ahead of these features. Forecast soundings show MUCAPE of 1500 to 2000 J/kg, lower level shear of 50 to 60 KTs, and steep mid level lapse rates around 8 C/km. These maintain the potential for strong to severe storms Friday afternoon. Large, possibly very large (greater than 2 inches) hail and damaging winds are the main threats. However, cannot rule out a tornado or two due to the forecast lower level helicity. The greatest threat area extends from the eastern Hill Country across the I-35 corridor to east of US 77, including the Austin and San Antonio metro areas. Most areas will see rainfall amounts of 1/4 inch or less, however, areas where the heavier showers and thunderstorms move across could see an inch or two due to well above normal PWs. Clouds will decrease from the west allowing high temperatures to warm to above normal most areas, except remaining below normal in the east due to lingering clouds there.

LONG TERM (Friday Night through Wednesday) . Convection will likely be pushing east out of the area by 00Z Saturday, but will hold onto some pop at least through midnight late Friday night. As the upper trough axis moves east on Saturday, surface high pressure and northerly winds are expected early in the weekend with moderately warm temperatures behind the system. Definitely not a lot of cooling with this front. A fairly flat and zonal upper flow will prevail on Sunday, allowing for dry weather through the end of the weekend. This zonal flow will also push the surface high quickly to the east giving us return flow and southerly winds by Sunday afternoon. Southerly winds this time of year mean warm temperatures, and thats what we will see from Sunday all the way into the middle part of next week.

The next large upper trough will be pushing through the Great Basin and 4 corners region by early Tue. Even though the dynamics will be way off to our west at 12Z Tue, that morning we could already start to see our typical streamer showers in an increasing low level jet. The chance for showers and storms will increase through the morning into the afternoon/evening on Tue as the upper trof approaches, dry line advances, and cold front comes in from the NW. SPC is outlooking portions of Texas already in their Day 7 which seems reasonable given the time of year and strength of the trough. There is still plenty of unknowns this far out but does look to be our one shot of much needed rain next week. Ensemble QPF for that Tue/Wed of next week vary from 1/2inch to well over 3 inches. A slow moving upper low with trailing fronts bring the potential but with our current drought conditions, will be biased toward a drier solution right now. Timing, qpf details, track of the low center, and severe weather threats will hopefully all come into better focus by the weekend.

After that system passes on Wednesday, rest of next week looks dry with NW flow aloft. Temp forecast throughout the extended was primarily the NBM output with highs in the 80s and 90s, with the 90s primarily across the sw and Rio Grande areas. Coolest morning looks to be Sunday morning with lows in the low to mid 50s most areas.

PRELIMINARY POINT TEMPS/POPS. Austin Camp Mabry 67 63 78 58 83 / 20 20 90 30 0 Austin Bergstrom Intl Airport 67 63 78 58 83 / 20 20 90 30 0 New Braunfels Muni Airport 70 65 82 60 87 / 20 20 80 20 0 Burnet Muni Airport 64 61 78 56 81 / 20 20 80 20 0 Del Rio Intl Airport 69 65 91 61 92 / 20 - - 0 0 Georgetown Muni Airport 68 62 77 56 81 / 20 20 90 30 0 Hondo Muni Airport 70 64 86 56 91 / 20 20 40 - 0 San Marcos Muni Airport 69 62 79 58 85 / 20 20 80 20 0 La Grange - Fayette Regional 70 66 79 63 83 / 10 30 90 50 0 San Antonio Intl Airport 69 65 83 60 87 / 20 20 70 20 0 Stinson Muni Airport 71 66 84 61 90 / 20 20 70 10 0

EWX WATCHES/WARNINGS/ADVISORIES. None.

Short-Term/Aviation . 04 Long-Term . 09


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Austin-Bergstrom International Airport, TX7 mi61 minNE 810.00 miOvercast51°F38°F61%1020.3 hPa
Austin City, Austin Camp Mabry, TX8 mi63 minVar 310.00 miOvercast54°F34°F47%1020.9 hPa
Austin Executive Airport, TX18 mi59 minENE 510.00 miOvercast52°F36°F54%1021 hPa
San Marcos, San Marcos Municipal Airport, TX22 mi58 minNE 910.00 miOvercast53°F36°F52%1020 hPa
Lago Vista TX, Rusty Allen Airport, TX22 mi59 minE 410.00 miOvercast51°F34°F52%1020.7 hPa

Link to 5 minute data for KAUS

Wind History from AUS (wind in knots)
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Last 24hrNE14
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NE11NE10NE10NE7NE8N7NE5NE4N3CalmCalmCalmE4NE3NE8
1 day agoW4SW8SW8W63655N24
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2 days agoNW3Calm5CalmE7CalmSE104NE7NE6NE5E6S7SE4CalmS5S5S4CalmCalmCalmCalmCalmCalm

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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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