Hi Tom.
The fix should be relatively simple.
WXSIMATE is requesting the data using TLSv1 but the website is wanting TLSv1.2.
Your assembler should have a process for the upgrade of the TLS procedure.
The actual error received by the app is Fatal alert, Handshake Failure on the TLSv1 protocol.
The process for redirecting to https is working ok. WXSIMATE is being redirected to https:\ but is then failing due to the less secure TLSv1 handshake.
Hope this gets you in the right direction.
Rob