WEATHER BULLETIN AND SEA STATE ZONE X VLD FM 181200 TO 191200 UTC. PART I: SEVERE WEATHER WARN. CENTRAL WEST AREA (LAT 30 TO 45 SOUTH AND LONG 95 TO 120 WEST): WIND W/NW 20/30KT GUSTS 40KT SHIFTING TO COUNT 182100UTC TO E OF AREA TO W/SW 25/35KT GUSTS 45KT, SEA 2.0/4.0M, VIS AVERAGE TO GOOD, SH/RN. SOUTHWEST AREA (LAT 45 TO 60 SOUTH AND LONG 95 TO 120 WEST): WIND W/NW 25/35KT GUSTS 45KT, SEA 3.0/5.0M, VIS AVERAGE, SH/RN. PART II: SYNOPTIC SITUATION (ANALYSIS 180600 UTC). HIGH 1026 HPA 35S/90W LOW 1006 HPA 44S/107W LOW 994 HPA 57S/101W PART III: FCST. NORTHEAST AREA (LAT 18 TO 30 SOUTH AND LONG 76 TO 95 WEST): WIND E/SE 15/25KT, SEA 1.0/3.0M, VIS GOOD. NORTHWEST AREA (LAT 18 TO 30 SOUTH AND LONG 95 TO 120 WEST): WIND N/NE 5/15KT SHIFTING TO E OF AREA TO E/SE 10/20KT, SEA 1.5/3.0M, VIS AVERAGE OCNL GOOD, SH/RN. CENTRAL EAST AREA (LAT 30 TO 45 SOUTH AND LONG 78 TO 95 WEST): WIND E/SE 15/25KT SHIFTING TO S OF AREA TO W/NW 20/30KT GUSTS 40KT, SEA 2.0/4.0M, VIS GOOD TO AVERAGE, SH/RN. SOUTHEAST AREA (LAT 45 TO 60 SOUTH AND LONG 81 TO 95 WEST): WIND W/SW 15/25KT SHIFTING TO COUNT 182100UTC TO N OF AREA TO W/NW 20/30KT GUSTS 40KT, SEA 4.0/6.0M, VIS GOOD TO AVERAGE, SH/RN. MET204JC