The storm originated from a low pressure area inside the Midwestern USA.
It tracked south, and became a broad area of low pressure which the National Hurricane Center assessed a high chance that the low could become a tropical cyclone.

A day later, on July 10, the broad low-pressure system emerged from the Florida Panhandle into Apalachee Bay in the northeastern Gulf of Mexico, attended by widespread showers and thunderstorms; concurrently, the NHC forecasted a high likelihood of tropical cyclone development within two days, noting a favorable environment and widespread convection, or thunderstorms, associated with the low.

By the morning of July 13, the thunderstorms moved closer to the center of circulation, as upper-level outflow expanded in all directions.
The NHC estimated that Barry attained Category 1 hurricane status by 12:00 UTC that day, concluding that Barry was producing a small area of hurricane-force winds based on observations from the Hurricane Hunters, Doppler radar wind estimates of 75 mph (121 km/h), and recorded sustained winds of 72 mph (116 km/h) at Eugene Island oil field.
Simultaneously, the storm reached its peak intensity, with a minimum central pressure of 991 millibars (29.3 inHg).
At 18:00 UTC that day, Barry made landfall as a Category 1 hurricane on Intracoastal City, Louisiana, before weakening to tropical storm status.
This made Barry the fourth tropical cyclone recorded making landfall as a hurricane on Louisiana in the month of July.

On July 15, the system became a low-pressure area, eventually becoming an extratropical system that brought heavy rain the Southern Ontario.
The storm originated from a low pressure area inside the Midwestern USA. It tracked south, and became a broad area of low pressure which the National Hurricane Center assessed a high chance that the low could become a tropical cyclone.
A day later, on July 10, the broad low-pressure system emerged from the Florida Panhandle into Apalachee Bay in the northeastern Gulf of Mexico, attended by widespread showers and thunderstorms; concurrently, the NHC forecasted a high likelihood of tropical cyclone development within two days, noting a favorable environment and widespread convection, or thunderstorms, associated with the low.
By the morning of July 13, the thunderstorms moved closer to the center of circulation, as upper-level outflow expanded in all directions. The NHC estimated that Barry attained Category 1 hurricane status by 12:00 UTC that day, concluding that Barry was producing a small area of hurricane-force winds based on observations from the Hurricane Hunters, Doppler radar wind estimates of 75 mph (121 km/h), and recorded sustained winds of 72 mph (116 km/h) at Eugene Island oil field. Simultaneously, the storm reached its peak intensity, with a minimum central pressure of 991 millibars (29.3 inHg). At 18:00 UTC that day, Barry made landfall as a Category 1 hurricane on Intracoastal City, Louisiana, before weakening to tropical storm status. This made Barry the fourth tropical cyclone recorded making landfall as a hurricane on Louisiana in the month of July.
On July 15, the system became a low-pressure area, eventually becoming an extratropical system that brought heavy rain the Southern Ontario.
Hurricane Barry (2019)