pilotwx: KHYI Fetched 30 Sep 1542Z (2026-09-30T15:42:01.592Z) from AviationWeather.gov Data API (NOAA/NWS Aviation Weather Center). Not for navigation. Data may be delayed or incomplete. Get an official briefing (1800wxbrief.com) before flight. == KHYI San Marcos Muni, TX, US SPECI observed 30 Sep 1530Z, 12 min ago [MVFR] SPECI KHYI 301530Z 17008KT 10SM OVC011 29/24 A2989 RMK AO2 Wind: 170° at 8 kt Visibility: 10+ SM Clouds: OVC 1,100 ft Ceiling: 1,100 ft AGL Temperature: 29°C, dewpoint 24°C Altimeter: 29.89 inHg (1012 hPa) TAF: none issued for this station.