#YY  MM DD hh mm WVHT  SwH  SwP  WWH  WWP SwD WWD  STEEPNESS  APD MWD
#yr  mo dy hr mn    m    m  sec    m  sec  -  degT     -      sec degT
2018 10 30 12 40  0.3   MM   MM   MM   MM  MM  MM        N/A   MM -99
2018 10 30 12 30  0.1   MM   MM   MM   MM  MM  MM        N/A   MM -99