Sondex went out to a small private group on TestFlight on July 26, 2025, and build 2 followed within a day. Both are version 1.0, as is every build since. Builds are numbered from 1.
What’s in it
Data. Sondex reads BUFKIT files. Import a .buf from Files, or paste a direct link to one. Pick a station to see which of GFS, NAM, NAM 4 km, HRRR and RAP it carries, and download the latest run from the Iowa Environmental Mesonet’s BUFKIT archive. Fetch Now on a station downloads the newest runs of the models you already have for it.
Library. Soundings are grouped by station, with search, sorting, ASOS and NWS filters, and favorites.
Map. The Profiles tab puts every station on a map, with ASOS, NWS and Favorites filters. Pins cluster as you zoom out.
Charts.
- Skew-T log-P
- Hodograph
- Time-height section
- Moisture potential
- Apparent temperature
Parameters. CAPE, CIN, LCL, LFC, EL, LI, K index, Total Totals, PW, Showalter, bulk shear, SRH, EHI and SWEAT. The info button on a chart lists them, with an “Atmospheric Story”: a short summary written from the same numbers.
Known issues
- Files with many forecast hours load slowly.
- The interface and chart styling are unfinished.
Report bugs and crashes through TestFlight: take a screenshot in Sondex and send it as beta feedback.