https://ftp.emc.ncep.noaa.gov/gc_wmb/jpeng/HERC20251006spread/al09/plots/
Index of /gc_wmb/jpeng/HERC20251006spread/al09/plots
index ofgcwmbplots
https://ftp.emc.ncep.noaa.gov/gc_wmb/jpeng/HERC20251006spread/al09/tc_pairs/
Index of /gc_wmb/jpeng/HERC20251006spread/al09/tc_pairs
index ofgcwmbtcpairs