HYSPLIT Forum: hysplitbbs.arl.noaa.gov

Hello, Does anyone know how the Pasquill Stability Product in the suite of ARL Current & Forecast Meteorology addresses the timing of 1 hour before and after sunset. Pasquill Stability is calculated differently for day and night times. I was wondering how the stability calculation specifically accom...

I noticed in using the trajectory tool that it is my thought that the Hybrid Sigma pressure NAM works best at showing trajectories at low initiation altitude. HRRR has the finest resolution but its trajectories were at 100+m when a 2 m trajectory was requested. I am interested in surface trajectorie...

I noticed when using the trajectory tool for Archived runs, that the Hybrid Sigma pressure NAM works best. It certainly shows the trajectories at low initiation points. HRRR has the finest resolution but its trajectories were at 100+m when a 2 m trajectory was requested on the input page. If I am in...

I will attempt other runs and if it does not continue to work I will come back with the information you requested.

Thank you for the response.

GC

When I try to set trajectory for 3 starting positions, only one (1st position) shows up. Can't see what I am doing incorrectly. Any ideas?
GC