#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
2024 04 28 12 00  1.0   MM   MM  1.0  6.0  MM  MM      STEEP   MM -99
2024 04 28 06 00  1.0   MM   MM  1.0  5.0  MM  MM VERY_STEEP   MM -99
2024 04 28 00 00  0.5   MM   MM  0.5  7.0  MM  MM        N/A   MM -99
2024 04 27 18 00  0.5   MM   MM  0.5  7.0  MM  MM        N/A   MM -99
2024 04 27 12 00  0.5   MM   MM  0.5  8.0  MM  MM        N/A   MM -99