WTJP31 RJTD 170300

WARNING 170300.

WARNING VALID 180300.

STORM WARNING.

SEVERE TROPICAL STORM 1607 CHANTHU (1607) 980 HPA

AT 39.1N 142.1E SEA EAST OF JAPAN MOVING NORTH 25 KNOTS.

POSITION GOOD.

MAX WINDS 55 KNOTS.

RADIUS OF OVER 50 KNOT WINDS 40 MILES EAST SEMICIRCLE AND 10 MILES

ELSEWHERE.

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

ELSEWHERE.

FORECAST POSITION FOR 171500UTC AT 45.8N 144.1E WITH 40 MILES RADIUS

OF 70 PERCENT PROBABILITY CIRCLE.

985 HPA, MAX WINDS 50 KNOTS.

FORECAST POSITION FOR 180300UTC AT 52.9N 146.3E WITH 80 MILES RADIUS

OF 70 PERCENT PROBABILITY CIRCLE.

985 HPA, MAX WINDS 50 KNOTS.

BECOMING EXTRATROPICAL LOW.



JAPAN METEOROLOGICAL AGENCY.=