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| Meteorological history | |
|---|---|
| Formed | August 5, 1964 |
| Dissipated | August 8, 1964 |
| Tropical storm | |
| 1-minute sustained (SSHWS/NWS) | |
| Highest winds | 70 mph (110 km/h) |
| Lowest pressure | 1000 mbar (hPa); 29.53 inHg |
| Overall effects | |
| Fatalities | None reported |
| Damage | $750,000 (1964 USD) |
| Areas affected | Louisiana and Texas |
| IBTrACS | |
Part of the 1964 Atlantic hurricane season | |
Tropical Storm Abby was an exceptionally small tropical cyclone that had minor effects across Southeast Texas in early August 1964. Forming as a tropical depression out of a trough south of Louisiana on August 5, the system moved generally westward. It was not until August 7 that the system began to organize. That day, an eye rapidly formed within the system and it became a tropical storm just 60 mi (95 km) southeast of Galveston, Texas. Soon thereafter, a weather reconnaissance plane reported a barometric pressure of 1000 mbar (hPa; 29.53 inHg) at the storm's center. Around 18:00 UTC (1:00 p.m. CDT), the newly named Abby attained peak winds of 70 mph (115 km/h). It subsequently made landfall near Matagorda, Texas four hours later. Once onshore gradual weakening ensued, though a brief period of re-organization delayed its dissipation. Abby degenerated into an area of showers on August 8 southwest of San Antonio, Texas.
Prior to Abby's landfall in Texas, gale warnings were issued for the coast and residents on Matagorda Island were evacuated. Overall, the storm's impacts were limited due to its small size. Only two structures sustained damage in Matagorda, one being destroyed by a possible tornado, and the remaining effects resulted from flooding in Jackson and Victoria Counties. Total damage from the storm was estimated at $750,000 with the majority stemming from crops.