inarg: needboreplot_2015070312_0413_0991_0320_1120_111_019.
 today2: 20150704
 today3: 20150705
 member:          111
 today: 20150703
 whichrun: 12
 timestring: 2015-07-04_07:00:00
 enssizein:            1  111
 x1,y1:          413         991
 x2,y2:          320        1120
 /scratch/01242/tg805225/pecan20150703/hiresrun/wrfout_d02_2015-07-04_07:00:00
 cold pool i,j:          413         991
 cold pool lat,lon:    40.60949      -100.5749    
 ambient i,j:          320        1120
 ambient lat,lon:    41.70013      -101.7996    
input of propagation direction done in command line.
ho has not been defined by the user, will be calculated by tools.
properties of density current not set by user, will be calclated using other methods.
density of ambient air is larger than the density of cold air.  Check.