Failing.
rtupdate.wunderground.com cert info on connect:
* Server certificate:
* subject: C=US; ST=New York; L=Armonk; O=International Business Machines Corporation; CN=*.wunderground.com
* start date: Jul 26 00:00:00 2023 GMT
* expire date: Aug 25 23:59:59 2024 GMT
* issuer: C=US; O=DigiCert Inc; CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1The thing expired at midnight GMT.
Same thing happened back in 2019:
https://www.wxforum.net/index.php?topic=37838.msg389317