Marine Weather and Tides
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 6:50AM||Sunset 8:30PM||Tuesday July 27, 2021 12:38 AM CDT (05:38 UTC)||Moonrise 10:19PM||Moonset 9:23AM||Illumination 92%|
7 Day Forecast for Marine Location Near Terrell Hills, TXHourly EDIT Help
Area Discussion for - Austin/San Antonio, TX  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS64 KEWX 270531 AAA AFDEWX
Area Forecast Discussion . UPDATED National Weather Service Austin/San Antonio TX 1231 AM CDT Tue Jul 27 2021
AVIATION. /06Z TAFS/ VFR conditions are expected across the area sites for the most part. The exception will be around 10Z to about 12Z for KSAT and KSSF as low MVFR cigs develop. Otherwise, VFR conditions with light and variable winds overnight and early Tuesday morning and out of the southeast around 5 to 8 knots along the I-35 sites and 10 knots with gusts up to 16 knots across KDRT.
PREV DISCUSSION. /ISSUED 641 PM CDT Mon Jul 26 2021/
AVIATION . VFR conditions will generally prevail across South Central Texas through the period. The exception will be a few hours around sunrise at the I-35 terminals where brief drops to MVFR and/or IFR are possible. A TEMPO has been added to cover this, but think these reductions in ceilings will be short lived. Winds will generally be south through the period as well, but some south-southwest winds are possible overnight and during the morning hours. With moisture increasing tomorrow as the high pressure moves away some of the weather models do show isolated showers and storms for the late morning into the evening. Coverage will be spotty, so no mention was made in this TAF package, but AUS and DRT are the most likely terminals to see any of these isolated showers if they do impact one of the TAF sites.
PREV DISCUSSION .
SHORT TERM (Tonight through Tuesday Night) . Latest GOES-16 WV imagery places a somewhat elongated Subtropical Ridge to our northwest, centered over southeastern Colorado. Meanwhile, a weak mid-level low is positioned over the western Gulf of Mexico, spinning its way westward early this afternoon. This low will have a small influence on our local weather, acting to trigger the seabreeze tomorrow as enhanced moisture return is noted in hi- res guidance for Tuesday afternoon. Temperatures will remain on the toasty side, with 1PM obs already in the lower to middle 90s across the region. Expect most spots to top out in the mid to upper 90s, with triple digits not out of the realm of possibility at the major climate sites AUS/SAT/ATT/DRT. Heat indices will remain below advisory criteria, mainly in the 100-107 range. Expect mainly clear skies and light east-southeasterly winds.
A mild and muggy night tonight as temperatures remain near seasonal norms in the lower to middle 70s. Expect a "slightly" cooler day on Tuesday, as a weak mid-level impulse rounds the eastern periphery of the Subtropical Ridge to our northwest, resulting in some isolated showers or storms developing by midday, especially across the Coastal Plains, Hill Country, and portions of the Southern Edwards Plateau. 12Z Hi-Res models are more into the possibility of isolated convection popping up by 18Z Tuesday and moving in from northeast to southwest. Will go with slight chance PoPs and have collaborated with FWD office to add low end PoPs into the forecast. Any showers or storms should quickly fall apart after 00Z follow by a quiet Tuesday night.
LONG TERM (Wednesday through Monday) . A couple of mid level impulses will move west over Southern Texas and northeastern Mexico while passing underneath the Subtropical Ridge centered over the Central Plains on Wednesday. Forcing by the impulses and heating of a seasonally moist airmass will generate isolated to widely scattered mainly afternoon showers and thunderstorms.
The Subtropical Ridge becomes the dominant feature for the remainder of this week into next week while centered over the Central/Southern Plains. With increased subsidence and decreased moisture, most areas will be rain-free. The exception being areas near the Coastal Plains where the seabreeze may generate isolated showers and thunderstorms mainly Friday afternoon. There is a potential for a couple of mid level impulses this weekend and/or next week, however, models show a lack of consistency and consensus. Later forecasts may have to include slight chances of showers and thunderstorms for parts of those days.
Near to slightly above normal temperatures are expected. Decreasing soil moisture, drying vegetation, and mixing of drier air aloft make heat index values only mildly elevated.
PRELIMINARY POINT TEMPS/POPS. Austin Camp Mabry 98 77 97 75 97 / 20 10 30 - 10 Austin Bergstrom Intl Airport 98 75 94 73 96 / 20 10 20 - 10 New Braunfels Muni Airport 97 74 95 73 96 / 10 - 20 - 10 Burnet Muni Airport 97 75 94 74 95 / 20 10 30 - 10 Del Rio Intl Airport 102 77 99 76 99 / 10 10 20 20 10 Georgetown Muni Airport 99 76 95 74 97 / 20 10 30 - 10 Hondo Muni Airport 97 74 95 73 96 / - - 20 - 10 San Marcos Muni Airport 98 74 96 73 97 / 20 - 20 - 10 La Grange - Fayette Regional 97 76 95 75 96 / 20 - 20 - 10 San Antonio Intl Airport 97 75 93 74 94 / - 10 20 - 10 Stinson Muni Airport 98 76 96 75 96 / - - 20 - 10
EWX WATCHES/WARNINGS/ADVISORIES. None.
Short-Term/Aviation . 17 Long-Term . 05
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|San Antonio, San Antonio International Airport, TX||6 mi||47 min||S 5||10.00 mi||Partly Cloudy||82°F||70°F||67%||1014 hPa|
|San Antonio - Kelly Field, TX||8 mi||42 min||SSE 7||10.00 mi||Fair||79°F||73°F||81%||1014.4 hPa|
|San Antonio, Stinson Municipal Airport, TX||9 mi||45 min||SSE 5||10.00 mi||Fair||81°F||75°F||82%||1013.8 hPa|
|Randolph Air Force Base, TX||11 mi||42 min||SE 4||10.00 mi||Fair||78°F||72°F||82%||1014.7 hPa|
|Castroville Municipal Airport, TX||22 mi||43 min||N 0||7.00 mi||Fair||80°F||71°F||74%||1016.6 hPa|
|San Antonio Boerne Stage Field, TX||22 mi||63 min||N 0||10.00 mi||Fair||73°F||66°F||78%||1017.3 hPa|
Link to 5 minute data for KSAT
Wind History from SAT (wind in knots)
|1 day ago||SE||S||S||S||S||S||S||S||SW||SW||W||S||S||S|
|2 days ago||S|
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