Tropical Storm Dolly became Hurricane Dolly just before it made landfall in the Yucatan Peninsula on August 20 . Dolly strengthened and was a minimal hurricane at landfall near Chetumal , Quintana Roo on August 20 . Weakened to a tropical storm , Dolly continued out into the Bay of Campeche , and it regained hurricane strength before a second landfall near Tampico , Tamaulipas on August 23 .