Measuring distance between 2 "clumps" of data that meet certain conditions

For a project, i have data in the form of wind speed (m/s) recorded with 1 minute intervals, starting from 2009 through to 2021. For the time of each recording I have created a datetime array in the form of yyyy:MM:dd_HH:mm:ss, and for the wind speed recorded at each minute i have created a double array.

The wind speed ranges from 0 through to 40+ m/s. For the project, the machnes can safely operate between wind speeds of 0-20 m/s. The machinery is damaged and can fall over when wind speeds reach 30m/s and above, Therefore, i need to measure the time taken for the wind speed to go from 20 to 30 m/s. The data is measured by 1 minute increments, from 2009 - 2020, so the data is quite messy when plotted. I have been given the following conditions that simplify measuring the time taken to go from 20 - 30 m/s.

• When speed exceeds 20 m/s, the first 2 consequtive points above the 20 m/s limit will be the 'initial point'.
• when speed exceeds 30 m/s, the first 2 consequtive points above the 30 m/s limit will be the 'final point'.

I need to record the time taken between the 'initial point' and the 'final point'. As there is a lot of data, the cases where wind speed goes from 20-30 occures several times, and ill need to record the corresponding time taken for each case.

Thanks very much :)