03/21←  2025-03-22 CWB twsfc map  →03/23

2025-03-22 00 UTC	2025-03-22 03 UTC
2025-03-22 06 UTC	2025-03-22 09 UTC
2025-03-22 12 UTC	2025-03-22 15 UTC
2025-03-22 18 UTC	2025-03-22 21 UTC