# head -n1 weather.txt | sed -e 's/\t/\n/g' -e 's/\r//' | nl | expand

     1  Current Date
     2  Time Stamp
     3  Air Press
     4  Dew Point
     5  R-Humidity
     6  Wind Sp 30m
     7  Wind Dir 30m
     8  Wind Sp 10m
     9  Wind Dir 10m
    10  Temp (2m)
    11  Temp (5m)
    12  Temp (10m)
    13  Temp (15m)
    14  Temp (20m)
    15  Temp (25m)
    16  Temp (30m)
    17  Rain Det