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0000152800 744 FQAZ68 LPMG 181634 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. I - TTT TTT TTT. VERY POOR VIS WARNING IN ZONES 3(ALTAIR), 5(ACORES) AND 30(MILNE). VERY POOR VIS WARNING UP TO 20 MILES FROM THE COAST OF ALL ISLANDS FROM AZORES IN ZONE 5(ACORES). II - WEATHER SUMMARY AT 181200UTC: HIGH/ 1021HPA/ 27N36W/ EXP 191200UTC/ 1023HPA/ 31N31W. LOW/ 984HPA/ 37N57W/ EXP 191200UTC/ 986HPA/ 42N50W. FRONTAL SYSTEM/ 41N30W/ 43N22W/ 46N19W/ 48N18W/ 45N16W/ MOV ENE 35KT/ MOD ACTIVITY. FRONTAL SYSTEM / 24N60W/ 27N54W/ 31N50W/ 37N48W/ 42N49W/ 41N46W/ MOV E 25KT/ MOD ACTIVITY. III - FORECAST VALID TO 191800UTC: 3 - ALTAIR: W/NW 3 TO 5, BEING VRB 2 OR 3 IN FAR SW AT THE BEGNNING, BACK S/SW. GOOD TO MOD VIS, BECMG OCNL POOR TO VERY POOR IN NW. W/SW WAVES 2 TO 3 M, BECMG W/NW IN FAR E. 5 ACORES: W/SW 3 TO 5. GOOD TO MOD VIS OCNL POOR TO VERY POOR. W/SW WAVES 1 TO 2 M, INCR 2 TO 3 M IN FAR W. 7 - IRVING: W QUAD 2 TO 4, BEING N QUAD IN E. GOOD VIS. W WAVES 1 TO 2 M, INCR 2 TO 3 M IN FAR NW. 30 MILNE: S QUAD 3 TO 5, BEING VRB 2 OR 3 IN N AT THE BEGINNING, INCR 5 TO 7. GOOD TO MOD VIS, OCNL POOR TO VERY POOR. S/SW WAVES 2 TO 3 M, INCR 3 TO 4 M IN S. 31 - MARSALA: S/SW 3 TO 5, INCR 5 TO 7 IN N. GOOD VIS, BECMG MOD TO POOR IN N. W/SW WAVES 2 TO 3 M, INCR 3 TO 4 M IN NW. METEOROLOGISTS: MOTA/VIEGAS. SOURCE: INSTITUTO PORTUGUES DO MAR E DA ATMOSFERA PORTUGAL.