▁response ▁to ▁an ▁upper - level ▁low ▁west ▁of ▁the ▁system , ▁and ▁the ▁bulk ▁of ▁Bor is ' s ▁deep ▁con ve ction ▁moved ▁ash ore ▁near ▁Ch ia pas , ▁Mexico ▁around ▁ 0 6 0 0   UTC ▁on ▁June   4 . ▁However , ▁the ▁cy clone ' s ▁north ward ▁motion ▁slow ed , ▁and ▁the ▁low - level ▁circul ation ▁remained ▁off sh ore , ▁failing ▁to ▁ever ▁make ▁land fall . ▁There after , ▁the ▁system ▁deg ener ated ▁into ▁a ▁tr ough ▁of ▁low ▁pressure ▁about ▁ 8 0   mi ▁( 1 3 0   km ) ▁east - n ortheast ▁of ▁Sal ina ▁Cruz , ▁Mexico . ▁ ▁Pre par ations ▁and ▁impact ▁ ▁A ▁few ▁tropical ▁cy clone ▁warnings ▁and ▁watch es ▁were ▁issued ▁as ▁Trop ical ▁Storm ▁Bor is ▁approached ▁South western ▁Mexico . ▁At ▁ 2 1 : 0 0   UTC ▁on ▁June   2 , ▁a ▁tropical ▁storm ▁watch ▁was ▁posted ▁from ▁Sal ina ▁Cruz , ▁O ax aca , ▁to ▁the ▁Mexico – Gu atem ala ▁border , ▁which ▁was ▁upgrad ed ▁to ▁a ▁tropical ▁storm ▁warning ▁early ▁the ▁following ▁day . ▁The ▁tropical ▁storm ▁warning ▁was ▁dis cont in ued ▁by ▁ 0 9 : 0 0   UTC ▁on ▁June   4 . ▁In ▁Ch ia pas , ▁ 1 2 2 ▁municipal ities ▁were ▁placed ▁on ▁alert ▁and ▁schools ▁were ▁susp ended ▁in ▁four ▁of ▁them . ▁All ▁but ▁four ▁municipal ities ▁in ▁Ch