 At 0000 UTC on July 31 , a tropical storm watch – indicating tropical storm force winds were possible within 48 hours – was issued from Port O 'Connor , Texas to the mouth of the Mississippi River . Three hours thereafter , a hurricane warning – signifying that hurricane @-@ force winds were likely in 24 hours or less – was issued from Freeport , Texas to Morgan City , Louisiana . A tropical storm warning was simultaneously put into effect from Port O 'Connor , Texas to Mobile , Alabama , significantly overlapping the existing hurricane warning . The tropical storm warning was discontinued at 1000 UTC on August 1 . Six hours later , the hurricane warning issued at 0300 UTC on July 31 was downgraded to a tropical storm warning , before the portion from Port Arthur , Texas to Morgan City , Louisiana was canceled . The remaining portion from Freeport to Port O 'Connor , Texas was discontinued at 0100 UTC on August 2 . 
