WTJP21 RJTD 151800

WARNING 151800.

WARNING VALID 161800.

WARNING IS UPDATED EVERY 6 HOURS.

STORM WARNING.

TROPICAL STORM 1607 CHANTHU (1607) DOWNGRADED FROM SEVERE TROPICAL

STORM 985 HPA

AT 30.4N 142.7E SEA EAST OF JAPAN MOVING NORTHWEST 14 KNOTS.

POSITION FAIR.

MAX WINDS 45 KNOTS NEAR CENTER.

RADIUS OF OVER 30 KNOT WINDS 210 MILES EAST SEMICIRCLE AND 120 MILES

ELSEWHERE.

FORECAST POSITION FOR 160600UTC AT 32.5N 141.5E WITH 40 MILES RADIUS

OF 70 PERCENT PROBABILITY CIRCLE.

985 HPA, MAX WINDS 45 KNOTS NEAR CENTER.

FORECAST POSITION FOR 161800UTC AT 35.0N 141.0E WITH 60 MILES RADIUS

OF 70 PERCENT PROBABILITY CIRCLE.

985 HPA, MAX WINDS 50 KNOTS NEAR CENTER.

EXTENDED OUTLOOK.

FORECAST POSITION FOR 171800UTC AT 46.1N 143.7E WITH 150 MILES RADIUS

OF 70 PERCENT PROBABILITY CIRCLE.

984 HPA, MAX WINDS 50 KNOTS.

BECOMING EXTRATROPICAL LOW.



JAPAN METEOROLOGICAL AGENCY.=