


Area Forecast Discussion
Issued by NWS Austin/San Antonio, TX
Issued by NWS Austin/San Antonio, TX
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756 FXUS64 KEWX 182316 AFDEWX Area Forecast Discussion National Weather Service Austin/San Antonio TX 616 PM CDT Fri Jul 18 2025 ...New AVIATION... .KEY MESSAGES... - Dry and warm weather over the weekend into next week with elevated heat index values through the period. && .SHORT TERM... (Tonight through Saturday night) Issued at 1253 PM CDT Fri Jul 18 2025 There are mostly sunny to partly cloudy skies across South Central Texas early this afternoon. This trend continues through early this evening. Isolated showers are ongoing across the eastern portion of the local area and the forecast calls for this activity to prevail through early this evening. Areas to the east of the I-35 corridor including the Coastal Plains have a 15 to 20 percent chance for a passing shower or two. Today`s highs are forecast to reach the upper 80s across the southern Edwards Plateau, mid 90s along the I-35 corridor, and up to 101 along the Rio Grande. Increased moisture tonight into the overnight period is forecast to result in mostly cloudy skies across most locations with the exception of partly cloudy skies along the Rio Grande. Tropical moisture continues to arrive across the local area throughout the day on Saturday as a mid to upper level trough moves across South Central Texas associated with the tropical disturbance that came onshore last night over southeastern Louisiana. Saturday`s highs are forecast to range from the upper 80s across the southern Edwards Plateau to the mid and upper 90s along the I-35 corridor, and up to 102 across the southern portion of the Rio Grande. Heat index values are forecast to be elevated ranging from 100 to 107 with a few places getting into the 108 to 109. Our suggestions are to stay hydrated and avoid outside activities during the peak heating hours which is the afternoon/early evening period. && .LONG TERM... (Sunday through Friday) Issued at 1253 PM CDT Fri Jul 18 2025 Dry and warm conditions are forecast for the extended weather period as the sub-tropical ridge builds and stays across the local area through Friday. Elevated heat index values from 100 to 107 are expected for areas along the I-35 corridor, Coastal Plains, and Rio Grande each afternoon. && .AVIATION... (00Z TAFS) Issued at 612 PM CDT Fri Jul 18 2025 VFR flight conditions prevail into tonight at all TAF sites with few to sct mid-level cumulus and sct to bkn high level clouds to the east of I-35. There is a storm or two in the coastal plains but they will subside after dark with no impacts at the TAF sites. Low stratus will develop and increase overnight into Saturday morning with prevailing MVFR conditions at the San Antonio terminals while Austin could see temporary MVFR ceilings. KDRT will remain VFR through the night. The conditions improve to VFR at all sites by mid to late morning and prevails through the rest of the period. Light to moderate south to southeasterly breezes continue. && .PRELIMINARY POINT TEMPS/POPS... Austin Camp Mabry 76 96 77 96 / 10 10 0 0 Austin Bergstrom Intl Airport 76 96 77 96 / 10 10 0 0 New Braunfels Muni Airport 75 97 76 97 / 0 0 0 0 Burnet Muni Airport 74 93 75 93 / 0 0 0 0 Del Rio Intl Airport 76 97 77 98 / 0 0 0 0 Georgetown Muni Airport 75 94 76 95 / 10 10 0 0 Hondo Muni Airport 74 96 74 96 / 0 0 0 0 San Marcos Muni Airport 75 96 75 96 / 0 0 0 0 La Grange - Fayette Regional 76 95 76 94 / 10 10 0 0 San Antonio Intl Airport 77 96 77 96 / 0 0 0 0 Stinson Muni Airport 76 99 77 98 / 0 0 0 0 && .EWX WATCHES/WARNINGS/ADVISORIES... None. && $$ Short-Term...17 Long-Term...17 Aviation...Brady