WWJP73 RJTD 080000 IMPORTANT WARNING FOR YOKOHAMA NAVTEX AREA 080000UTC ISSUED AT 080300UTC PRESSURE GRADIENT IS STEEP WARNING(NEAR GALE) EASTERN SEA OFF SANRIKU, NORTHERN SEA OFF KANTO, WESTERN SEA OFF TOKAI, NORTHERN SEA OFF SHIKOKU NXT WARNING WILL BE ISSUED BEFORE 080900UTC =