WTJP21 RJTD 041200

WARNING 041200.

WARNING VALID 051200.

WARNING IS UPDATED EVERY 6 HOURS.

TYPHOON WARNING.

SEVERE TROPICAL STORM 1601 NEPARTAK (1601) UPGRADED FROM TROPICAL

STORM 990 HPA

AT 13.3N 139.7E SEA EAST OF PHILIPPINES MOVING WESTNORTHWEST 16

KNOTS.

POSITION FAIR.

MAX WINDS 50 KNOTS NEAR CENTER.

RADIUS OF OVER 30 KNOT WINDS 150 MILES.

FORECAST POSITION FOR 050000UTC AT 14.8N 137.4E WITH 40 MILES RADIUS

OF 70 PERCENT PROBABILITY CIRCLE.

980 HPA, MAX WINDS 60 KNOTS NEAR CENTER.

FORECAST POSITION FOR 051200UTC AT 16.4N 134.9E WITH 60 MILES RADIUS

OF 70 PERCENT PROBABILITY CIRCLE.

970 HPA, MAX WINDS 70 KNOTS NEAR CENTER.

EXTENDED OUTLOOK.

FORECAST POSITION FOR 061200UTC AT 19.7N 128.9E WITH 110 MILES RADIUS

OF 70 PERCENT PROBABILITY CIRCLE.

955 HPA, MAX WINDS 80 KNOTS NEAR CENTER.

FORECAST POSITION FOR 071200UTC AT 22.9N 123.7E WITH 140 MILES RADIUS

OF 70 PERCENT PROBABILITY CIRCLE.

940 HPA, MAX WINDS 90 KNOTS NEAR CENTER.



JAPAN METEOROLOGICAL AGENCY.=