One of our networks (CZWN) went HTTPS-only.
mesonet-map-common.php V3.08 was released to use curl for the access to the regional network’s config/data files to produce the mesonet-map.
You can use mesonet-map-check-versions.php on your installation to see what file(s) may need update.
Download the full zip and instructions here or just the mesonet-map-common.php V3.08 - 12-Aug-2017 from here
Best regards,
Ken