03/15←  2025-03-16 CWB twsfc map  →03/17

2025-03-16 00 UTC	2025-03-16 03 UTC
2025-03-16 06 UTC	2025-03-16 09 UTC
2025-03-16 12 UTC	2025-03-16 15 UTC
2025-03-16 18 UTC	2025-03-16 21 UTC