WWJP27 RJTD 281800 WARNING AND SUMMARY 281800. WARNING VALID 291800. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. DEVELOPING LOW 986 HPA AT 47N 145E SEA OF OKHOTSK MOVING EAST 20 KNOTS. WINDS 30 TO 50 KNOTS WITHIN 1500 MILES OF LOW EAST SEMICIRCLE AND 900 MILES ELSEWHERE. EXPECTED WINDS 30 TO 55 KNOTS WITHIN 1500 MILES OF LOW EAST SEMICIRCLE AND 1100 MILES ELSEWHERE WITHIN NEXT 18 HOURS. FORECAST POSITION FOR 290600UTC AT 46N 150E WITH UNCERTAINTY OF 50 MILES RADIUS. FORECAST POSITION FOR 291800UTC AT 51N 163E WITH UNCERTAINTY OF 85 MILES RADIUS. ANOTHER LOW 984 HPA AT 46N 154E MOVING NE 20 KNOTS. WARNING. DENSE FOG OBSERVED LOCALLY OVER SEA OF OKHOTSK. WARNING. DENSE FOG OBSERVED LOCALLY OVER WATERS BOUNDED BY 46N 150E 47N 152E 55N 162E 55N 180E 40N 180E 34N 170E 37N 160E 40N 150E 46N 150E. SUMMARY. HIGH 1024 HPA AT 30N 126E EAST 20 KT. WARM FRONT FROM 46N 154E TO 47N 161E 45N 167E. COLD FRONT FROM 46N 154E TO 42N 156E 37N 152E 32N 147E. WARM FRONT FROM 39N 161E TO 39N 166E 38N 170E. COLD FRONT FROM 39N 161E TO 32N 153E 26N 144E. JAPAN METEOROLOGICAL AGENCY.=