During the next twenty-four hours, Dalila strengthened slightly further while tracking steadily northwestward, attaining peak winds of 60 mph (97 km/h) early on the following day.

On the mainland of Mexico, the outer rainbands of Dalila dropped heavy rainfall, especially in Baja California Sur, Jalisco, with more than 16 inches (410 mm) of precipitation in some areas.

[1] The National Hurricane Center began issuing Tropical Weather Outlooks (TWOs)[nb 1] and initially noting that slow development was possible within the next 48 hours.

[4] After additional development, it is estimated that Tropical Depression Seven-E formed at 0000 UTC on July 22, while about 460 miles (740 km) south of Manzanillo, Colima.

[1] A strong upper-level high pressure area generated moderate shear, though the National Hurricane Center noted that it would not interfere with intensification.

[6] Early on July 23, a burst of deep convection occurred southwest of the center of circulation, while satellite imagery indicated that development of banding features.

[9] However, at 0000 UTC on July 25, Dalila attained its peak intensity with maximum sustained winds of 60 mph (97 km/h) and a minimum barometric pressure of 995 mbar (29.4 inHg).

[1] Later on July 25, Dalila curved west-northwestward and began entering a region of colder sea surface temperatures, resulting in weakening as the cloud pattern became less organized.

As a result, the National Hurricane Center ceased advisories on Dalila late on July 27,[12] since it degenerated into a remnant low pressure area while located about 460 miles (740 km) west of the southern tip of Baja California.

[1] However, the Civil Defense authorities in Mexico posted a "blue alert" for the states of Baja California Sur, Colima, Jalisco, Michoacán, and Nayarit on July 23.