Louisiana, 2023

Flash Flooding and Hail in Louisiana, July 22, 2023

July 22, 2023 · NWS LIX · 6 events in 3 counties and zones

A remnant outflow boundary made its way over southern Mississippi during the morning. Once daytime heating increased, convection formed along that boundary.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
6

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS LIX wrote it up.

A remnant outflow boundary made its way over southern Mississippi during the morning. Once daytime heating increased, convection formed along that boundary. The convection formed a line and surged out across southeast Louisiana, coastal Mississippi, and the marine waters before dying out at sunset.

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

3 flash flood, 2 thunderstorm wind, 1 hail. Local standard time, as filed.

Thunderstorm Wind, West Feliciana

When
July 22, 3:18 PM CST
Where
West Feliciana County, 1.91 mi ENE of St Francisville
Measured
50 kt (58 mph) estimated gust
Reported by
Emergency Manager
Coordinates
30.780, -91.350

Trees down along LA-965 and within the low water bridge area due to thunderstorm winds. Time estimated from radar.

Hail, Livingston

When
July 22, 4:40 PM CST
Where
Livingston County, 1.82 mi SW of Springfield
Measured
1 in hail
Reported by
Trained Spotter
Coordinates
30.410, -90.570

One inch hail reported from a Skywarn Spotter. Two videos of one inch hail from Carter and Wadesboro.

Thunderstorm Wind, Orleans

When
July 22, 6:07 PM CST
Where
Orleans County, 0.69 mi S of (New)lkfrnt Arpt New
Measured
56 kt (64 mph) measured gust
Reported by
ASOS
Coordinates
30.040, -90.030

The ASOS station KNEW New Orleans Lakefront Airport measured a thunderstorm wind gust of 64 mph or 56 kts.

Flash Flood, Orleans

When
July 22, 6:42 PM CST to 7:42 PM CST
Where
Orleans County, 1.38 mi N of Algiers to 0.93 mi E of Vieux Carre
Cause
Heavy Rain
Reported by
Emergency Manager
Coordinates
29.970, -90.050

Streetwise website showed flash flooding at Galvez/Frenchmen St intersection.

Flash Flood, Orleans

When
July 22, 6:56 PM CST to 7:56 PM CST
Where
Orleans County, 1.51 mi NNE of Vieux Carre to 2.28 mi NNE of Vieux Carre
Cause
Heavy Rain
Reported by
Emergency Manager
Coordinates
29.990, -90.070

Streetwise reported flash flooding along Gentilly Boulevard.

Flash Flood, Orleans

When
July 22, 7:03 PM CST to 8:03 PM CST
Where
Orleans County, 2.39 mi NNE of Algiers to 2.08 mi NNE of Algiers
Cause
Heavy Rain
Reported by
Emergency Manager
Coordinates
29.980, -90.030

The Streetwise website indicated street flash flooding at Florida Ave/Alvar Street.

What these are

Thunderstorm Wind
Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Louisiana in 2023Every state in 2023This day in weather historyWarnings in Louisiana, July 2023

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 1125748, 1125751, 1125761, 1125765, 1125770, 1125775.