It was downgraded to a tropical depression near LOCATION@1 , LOCATION@2 , but its remnants were last distinguishable in the eastern LOCATION@3 region on August NUMBER@1 , when it was absorbed by a frontal boundary .

Katrina weakened to a tropical depression near LOCATION@1 , LOCATION@2 , but its remnants were last seen around the eastern LOCATION@3 on August NUMBER@1 when it became extratropical .
