Date/Time_(UTC)     Vmax(kts)    mperc-Prob-SEF   vmax-only-Prob-SEF
2021-02-11 00:00:00      35.0    00%              00%
2021-02-11 01:00:00       NaN    00%              00%
2021-02-11 02:00:00       NaN    00%              00%
2021-02-11 03:00:00       NaN    00%              00%
2021-02-11 04:00:00       NaN    00%              00%