WWJP83 RJTD 081800 VITAL WARNING FOR YOKOHAMA NAVTEX AREA 081800UTC ISSUED AT 082100UTC PRESSURE GRADIENT IS STEEP GALE WARNING NORTHERN SEA OFF SHIKOKU WITH MAX WINDS 40 KT SOUTHERN SEA OFF TOKAI WITH 35 KT WARNING(NEAR GALE) WESTERN SEA OFF SANRIKU, NORTHERN SEA OFF KANTO, EASTERN SEA OFF TOKAI, WESTERN SEA OFF TOKAI, SOUTHERN SEA OFF SHIKOKU WARNING(DENSE FOG) EASTERN SEA OFF SANRIKU, WESTERN SEA OFF SANRIKU POOR VIS 0.3 MILES OR LESS IN PLACES NXT WARNING WILL BE ISSUED BEFORE 090300UTC =