WWJP25 RJTD 101200 WARNING AND SUMMARY 101200. WARNING VALID 111200. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. DEVELOPING LOW 984 HPA AT 41N 146E SEA EAST OF JAPAN MOVING NORTHEAST 25 KNOTS. OCCLUDED FRONT FROM 41N 146E TO 41N 150E 41N 153E. WARM FRONT FROM 41N 153E TO 39N 160E 37N 168E. COLD FRONT FROM 41N 153E TO 36N 152E 31N 149E 27N 145E 24N 141E. WINDS 30 TO 50 KNOTS WITHIN 1000 MILES OF LOW SOUTHWEST SEMICIRCLE AND 800 MILES ELSEWHERE. FORECAST POSITION FOR 111200UTC AT 46N 159E WITH UNCERTAINTY OF 100 MILES RADIUS. ANOTHER LOW 1000 HPA AT 39N 139E MOVING EASTNORTHEAST 10 KNOTS. WARNING. DENSE FOG OBSERVED LOCALLY OVER WATERS BOUNDED BY 28N 147E 39N 155E 36N 168E 35N 180E 31N 180E 28N 161E 28N 147E. SUMMARY. LOW 1018 HPA AT 57N 152E NE SLOWLY. HIGH 1030 HPA AT 27N 121E EAST SLOWLY. HIGH 1034 HPA AT 39N 180E EAST 30 KT. JAPAN METEOROLOGICAL AGENCY.=