Add arguments to function
Remove comment
Set number of starting locations for dispersion run
Determine whether the run_years input is a year/range
Make a vector list of run days in POSIXct format
Make loop with all run days
Define starting time parameters
Make nested loop with daily beginning hours
Begin block for determination of met files to use
Determine the start time of the model run
Determine the end time of the model run
Determine whether the start year is a leap year
Determine whether the beginning/end of run crosses a year
Determine whether the beginning/end of run crosses a month
Divide different requirements for met files into cases
Determine which of the three cases is true
Start code block for getting vector lists of GDAS 1-deg files
Handle case of potentially misssing .w5 GDAS file in Feb.
Get met file list for case wrapping over a year boundary
Get met file list for case wrapping over a month boundary