A tropical wave meandered in the Bay of Campeche for a few days in mid June before slowly tracking northeastward towards the Louisiana coastline. It actually didn't attain tropical storm status until after it made landfall in Terrebonne Parish on the early morning of June 19th. The generally weaker nature of the storm meant that wind and surge were the lesser of impacts. However, a band of very heavy rainfall developed on the east side of the storm and brought several inches to upwards of one foot of rain from the eastern side of New Orleans metro to St. Tammany Parish. Peak wind gusts across the region barely reached tropical storm strength.

Tropical Storm in UPPER ST. BERNARD, LOUISIANA
From 19-JUN-21 06:00:00 to 19-JUN-21 06:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A few tropical storm force gusts were measured across the parish, but no significant impacts were reported.

Tropical Storm in LOWER ST. BERNARD, LOUISIANA
From 19-JUN-21 06:00:00 to 19-JUN-21 06:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A few tropical storm force gusts were measured across the parish, but no significant impacts were reported.

Storm Surge/Tide in SOUTHEAST ST. TAMMANY PARISH, LOUISIANA
From 19-JUN-21 06:00:00 to 19-JUN-21 06:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Tide gauges on the southeast side of Slidell registered a 1 to 3 ft rise due to storm surge.

Flash Flood in ST. TAMMANY, LOUISIANA
From 18-JUN-21 22:31:00 to 18-JUN-21 22:31:00 (CST-6)
Location: NORTH SLIDELL
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Local fire department reported extensive street flooding in neighborhoods off Gause and Fremaux Boulevards.

Flash Flood in ST. TAMMANY, LOUISIANA
From 18-JUN-21 22:30:00 to 18-JUN-21 22:30:00 (CST-6)
Location: OAKLAWN
Flood cause: Heavy Rain / Tropical System
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Public

A member of the public reported street flooding leading to multiple vehicles stalling and being stranded.

Tropical Storm in LOWER JEFFERSON, LOUISIANA
From 19-JUN-21 06:00:00 to 19-JUN-21 06:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A few tropical storm force gusts of 40 to 50 mph were measured across the parish, but no significant impacts were reported. Based on gauge data, inundation of around 1 ft likely affected portions of Grand isle.

Tropical Storm in LOWER PLAQUEMINES, LOUISIANA
From 19-JUN-21 06:00:00 to 19-JUN-21 06:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A few tropical storm force gusts were measured across the parish, but no significant impacts were reported.

Flash Flood in ST. TAMMANY, LOUISIANA
From 18-JUN-21 23:13:00 to 18-JUN-21 23:13:00 (CST-6)
Location: NORTH SLIDELL
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public reported numerous impassible streets and high water on the east side of Slidell.

Tropical Storm in UPPER JEFFERSON, LOUISIANA
From 19-JUN-21 06:00:00 to 19-JUN-21 06:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A few tropical storm force gusts of 40 to 50 mph were measured across the parish, but no significant impacts were reported.

Tropical Storm in EASTERN ORLEANS PARISH, LOUISIANA
From 19-JUN-21 06:00:00 to 19-JUN-21 06:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A few tropical storm force gusts were measured across the parish, but no significant impacts were reported. In far eastern portions of the parish, 4 to 6 inches of rain fell over the course of around 4 to 6 hours, and gauge data indicates inundation of up to 1 ft likely occurred in some of the lowest lying areas.

Tropical Storm in WESTERN ORLEANS PARISH, LOUISIANA
From 19-JUN-21 06:00:00 to 19-JUN-21 06:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A few tropical storm force gusts were measured across the parish, but no significant impacts were reported.

Storm Surge/Tide in LOWER PLAQUEMINES, LOUISIANA
From 19-JUN-21 06:00:00 to 19-JUN-21 06:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Based on gauge data, storm surge inundation of 1 to 2 feet likely occurred in low lying areas outside of the federal levee system.

Tropical Storm in UPPER PLAQUEMINES, LOUISIANA
From 19-JUN-21 06:00:00 to 19-JUN-21 06:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A few tropical storm force gusts were measured across the parish, but no significant impacts were reported.

Storm Surge/Tide in UPPER ST. BERNARD, LOUISIANA
From 19-JUN-21 06:00:00 to 19-JUN-21 06:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Based on gauge data, storm surge inundation of 1 to 3 feet likely occurred in areas outside of the federal levee system, with the greatest impacts around the Shell Beach area.

Tropical Storm in SOUTHEAST ST. TAMMANY PARISH, LOUISIANA
From 19-JUN-21 06:00:00 to 19-JUN-21 06:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A band of persistent rainfall led to 8 to 10 inches of rain with localized higher amounts across the southeastern portion of the parish, mostly in a four-hour period. The highest rainfall total measured in the parish was 10.23 inches 5 miles east of Slidell. This rainfall led to flash flooding across much of Slidell. Dozens of roads were closed due to high water and over 200 homes were affected with at least 100 suffering at least minor flood damage, and a few taking on as much as 1 to 2 feet of water. The hardest hit areas were generally along French Branch from the Whisperwood subdivision through the Lake Village and Willowood subdivisions. Several high water rescues were conducted in the hardest hit areas. The flash flooding may have been exacerbated by elevated water in the lower reaches of the Pearl River due to storm surge which prevented some of the rain water from draining. Tropical storm force gusts led to minor wind damage in the form of scattered tree branches down and a few power outages.