WWAZ60 LPMG 171613 ASS: NAVTEX ROUTINE FE// FE// 171613 UTC OUT 25 INSTITUTO PORTUGUES DO MAR E DA ATMOSFERA. WEATHER BULLETIN FOR SHIPPING FOR THE ATLANTIC ZONES LIMITED BY MERIDIANS 40W-22W AND BY PARALLELS 30N-45N. TTT TTT TTT. VERY POOR VIS WARNING IN ZONES 3(ALTAIR) AND 5(ACORES). VERY POOR VIS WARNING UP TO 20 MILES FROM THE COAST OF CORVO, FLORES, FAIAL, PICO, S.JORGE, GRACIOSA AND TERCEIRA ISLANDS FROM AZORES IN ZONE 5(ACORES). WEATHER SUMMARY AT 171200UTC: FRONTAL SYSTEM/ 40N47W/ 43N35W/ 43N30W/ 41N26W/ EXP 181200UTC/ 42N29W/ 45N20W/ 49N16W/ 45N13W/ MOD ACTIVITY. LOW/ 996HPA/ 43N35W/ EXP 181200UTC/ 987HPA/ 50N21W. HIGH/ 1020HPA/ 23N35W/ EXP 181200UTC/ 1022HPA/ 28N35W. FRONTAL SYSTEM/ 30N60W/ 35N56W/ 41N57W/ 39N47W/ EXP 181200UTC/ 30N50W/ 39N47W/ 42N48W/ 42N34W/ MOD ACTIVITY. FORECAST VALID TO 181800UTC: 3 - ALTAIR: W/SW 5 TO 7 BEING S/SW IN E AT FIRST, VEER GRADUALLY W/NW 3 TO 5 AND IN FAR SW BECMG VRB 2 TO 3. GOOD TO MOF VIS, BEING POOR TO VERY POOR IN SE DURING THE FIRST HALF. S/SW WAVES 2 TO 3 M, BECMG GRADUALLY W/SW. 5 ACORES: W/SW 3 TO 5, BEING VRB 2 TO 3 IN FAR SE AT FIRST. GOOD TO MOD VIS, TEMPO POOR TO VERY POOR. W/SW WAVES 2 TO 3 M, DECR 1 TO 2 M. 7 - IRVING: W QUAD 2 TO 4, BECMG VRB IN E. GOOD VIS. W WAVES 1 TO 2 M. 30 MILNE: IN N: VRB 2 TO 4 BEING W/SW 3 TO 5 IN FAR S AT FIRST, BECMG E/SE 3 TO 5 AT THE END. IN S: W/SW 3 TO 5, VEER S/SW. GOOD TO MOD VIS, TEMPO MOD TO POOR IN S. S/SW WAVES 2 TO 3 M. 31 - MARSALA: W/SW 3 TO 5 OCNL 6 IN N AT FIRST, BACK TEMPO S/SW. GOOD VIS OCNL MOD, BECMG TEMPO MOD TO POOR IN N. W/SW WAVES 2 TO 3 M, BECMG W/SW AND INCR 3 TO 4 M IN FAR E AT THE END. METEOROLOGISTS: VIEGAS/VIEIRA. SOURCE: INSTITUTO PORTUGUES DO MAR E DA ATMOSFERA PORTUGAL.