Looks like their V3.32 broke it… you can do a quick fix by replacing (in mesonet-map.php or wxmesonetmap.php depending on which you use)
<script src="https://maps.google.com/maps/api/js?key=<?php echo $googleAPI; ?>&language=<?php print $Lang; ?>" type="text/javascript"></script>
with
<script src="https://maps.google.com/maps/api/js?key=<?php echo $googleAPI; ?>&language=<?php print $Lang; ?>&v=3.31" type="text/javascript"></script>
to force the older version API to work.
I’ll look at a ‘real’ fix for V3.32 Google API tomorrow…