Manually enter a four letter station identifier or 5-digit WMO number, select type product, year, month, day and time for the diagram/data, whether you want lifted parcel temperatures plotted or not, size of diagram, and the type of page.
IE browser users MUST have the view set to 100% for the map-selectable location finder to work properly. This is apparently NOT a problem with either Firefox or Chrome users, who can either have their browsers zoomed in or zoomed out.
For recent CONUS sounding data with a map-selectable layout, go here.
For recent global sounding data with manual station ID entry, go here.
For archived CONUS raw sounding data and additional options, go here.
Check a map or this table for possible station identifiers.