HYSPLIT Forum: hysplitbbs.arl.noaa.gov

When you run the the automated trajectory calculations, it says the default hours are : 00 06 12 18 UTC. Do you have to run the daily runs with only these 4 UTC times or can we say repeat at 21 UTC time instead so it corresponds to the time in MST that I want the trajectories from.

The "Special Runs - Daily" defaults to starting trajectories every day at 00, 06, 12, and 18 UTC. You can change these to the start times you want. There doesn't have to be 4 start times. You can set this to start at 21 UTC only.