The second tropical cyclone and the first named storm of the 1989 Atlantic hurricane season, Allison formed on June 24 in the northwestern Gulf of Mexico.

Its remnants entered the Gulf of Mexico on June 22, when a westward moving tropical wave reached the area.

[1] The depression continued to organize as it drifted to the north, and became Tropical Storm Allison on June 26 off the Texas coast.

[2] The frontal trough outran the system, and the building ridge to Allison's north forced the extratropical depression turned to the south and southwest.

After executing a cyclonic loop over Texas, the ridge to the north began to erode, allowing Allison to track northeast and out of the state.

[3] The slow movement of Allison and its remnants resulted in heavy rainfall over East Texas, with some areas receiving more than 20 inches (510 mm).

Severe flooding occurred, with more than 6,200 homes suffering water damage, which forced hundreds of residents to evacuate and stranding thousands of other people.

In Brazoria County, rainfall amounts were generally between 6 and 7 inches (150 and 180 mm), causing flooding in the West Columbia area.

Precipitation up to 10 inches (250 mm) in Chambers County inundated many streets and caused water intrusion into several homes.

In Jasper County, precipitation amounts reaching 9 inches (230 mm) caused flooding in Buna and Kirbyville, as well as low-lying areas around the Sabine River.

Throughout Matagorda County, several streets and low-lying areas were inundated by water due to rainfall amounts up to 10 inches (250 mm).

This caused minor beach erosion in Jefferson County, while portions of Texas State Highway 87 was also closed here due to sand and debris washed onto the roadway.

[4] While Allison's winds were not overly strong, it caused tremendous flooding in Texas and Louisiana, with 20 to 25 in (510 to 640 mm) in of rain occurring in some locations.

Two teenage boys were killed when their raft got sucked into a drainage pipe from the runoff of Allison in Beaumont, Texas.