For Hirokawa Maru - Bonegi 1 :
No gale warning.
The reliability of the situation is good.
Fairly cloudless skies becoming changeable during the morning, very cloudy with possibility of thunder storms in the afternoon. No precipitation in the morning, possibility of showers in the afternoon. In the evening, clear spells, risk of mist forming.
Possibility of showers SE force 1 in the morning temporarily WNW in the middle of the day. Gusts reaching 6 knots in the middle of the day. Slight sea. Low, short swell from S. Visibility reduced by mist becoming good in the middle of the day then reduced by mist.