inarg: needboreplot_2015062518_0181_0206_0179_0244_000_003.
 today2: 20150626
 today3: 20150627
 member:            0
 today: 20150625
 whichrun: 18
 timestring: 2015-06-25_21:00:00
 enssizein:           20  000
 x1,y1:          181         206
 x2,y2:          179         244
 /scratch/01242/tg805225/pecan20150625/wrfrun001b/wrfout_d01_2015-06-25_21:00:00
 cold pool i,j:          181         206
 cold pool lat,lon:    38.34307      -97.91809    
 ambient i,j:          179         244
 ambient lat,lon:    39.70565      -98.08627    
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.