WWJP83 RJTD 281800 VITAL WARNING FOR YOKOHAMA NAVTEX AREA 281800UTC ISSUED AT 282100UTC PRESSURE GRADIENT IS STEEP GALE WARNING SOUTHERN SEA OFF KANTO, EASTERN SEA OFF TOKAI, SOUTHERN SEA OFF TOKAI, SOUTHERN SEA OFF SHIKOKU WITH MAX WINDS 40 KT EASTERN SEA OFF SANRIKU, WESTERN SEA OFF SANRIKU, NORTHERN SEA OFF KANTO WITH 35 KT WARNING(NEAR GALE) WESTERN SEA OFF TOKAI, NORTHERN SEA OFF SHIKOKU NXT WARNING WILL BE ISSUED BEFORE 290300UTC =