You have present weather split into 3 pieces
intensity -, +, VC
characteristics TS, FZ, SH, BL, DR, MI, BC, PR
types DZ, RA, SN, SG, PL, DS, GR, GS, UP, IC, FG, BR, SA, DU, HZ, FU, VA, PY, DU, PO, SQ, FC, DS, SS
But it should be
intensity -, +, VC
descriptor MI, PR, BC, DR, BL, SH, TS, FZ
precipitation DZ, RA, SN, SG, IC, PE, GR, GS, UP
obscuration BR, FG, FU, VA, DU, SA, HZ, PY
other PO, SQ, FC, SS
The precipitation piece can occur 3 times ordered in decreasing intensity
You have present weather split into 3 pieces
intensity -, +, VC
characteristics TS, FZ, SH, BL, DR, MI, BC, PR
types DZ, RA, SN, SG, PL, DS, GR, GS, UP, IC, FG, BR, SA, DU, HZ, FU, VA, PY, DU, PO, SQ, FC, DS, SS
But it should be
intensity -, +, VC
descriptor MI, PR, BC, DR, BL, SH, TS, FZ
precipitation DZ, RA, SN, SG, IC, PE, GR, GS, UP
obscuration BR, FG, FU, VA, DU, SA, HZ, PY
other PO, SQ, FC, SS
The precipitation piece can occur 3 times ordered in decreasing intensity