6hour snow service total is sub-optimal

``` { "Location": "Rockford", "02/22: 12 PM": "T", "02/22: 6 AM": "T", "02/22: 12 AM": "T", "02/21: 6 PM": "nan", "02/21: 12 PM": "0.0", "02/21: 6 AM": "0.0", "02/21: 12 AM": "0.0", "02/20: 6 PM": "nan", "Total 48 hr Snow": "0.0" }, ```