allow specification of exact time on command line optimize grid subsetting, cut runtime from 4m33s to 3m33s  catch upstream error without data
allow specification of exact time on command line
optimize grid subsetting, cut runtime from 4m33s to 3m33s 
catch upstream error without data
akrherz/iem,akrherz/iem,akrherz/iem,akrherz/iem,akrherz/iem