ALERT: No maps available for GFS run 18 UTC Fri 14 Dec 2018. Defaulting to 06 UTC Thu 25 Apr 2024.
ALERT: Maps for forecast hour 336 do not exist, defaulting to fhour = 39.
Valid: 21 UTC Fri 26 Apr 2024
ERROR: Parameter HGT unavailable for GFS forecast hour 39.