Louisiana, 2020Flash Flood in Louisiana, September 23, 2020
September 23, 2020 · NWS SHV · 1 event in 1 county or zone
Post-Tropical Cyclone Beta moved ashore across portions of extreme Southeast Texas during the morning hours of September 23rd, with deep tropical moisture associated with this system continuing to spread northeast across much of Louisiana from the 21st to the 23rd. 50 to 3 inches falling over this area as the remnants of Beta tracked northeast across Central Louisiana and Western Mississippi.
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- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
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.
Post-Tropical Cyclone Beta moved ashore across portions of extreme Southeast Texas during the morning hours of September 23rd, with deep tropical moisture associated with this system continuing to spread northeast across much of Louisiana from the 21st to the 23rd. Periods of showers and embedded thunderstorms developed and spread across North Louisiana from the 21st through the 22nd ahead of Beta, resulting in widespread rainfall amounts of 1.50 to in excess of 3 inches, with additional rainfall amounts of 1.50 to 3 inches falling over this area as the remnants of Beta tracked northeast across Central Louisiana and Western Mississippi. Given the saturated grounds due to rains over the prior few days, localized flooding was observed in Sterlington in Northern Ouachita Parish.
What forecasters said that day
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Shreveport, LA wrote its last area forecast discussion before the first event at Sep 23, 11:41 AM CST, 52 minutes earlier.
Area forecast discussion, Sep 23, 11:41 AM CST, 52 minutes before
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</html>Hazardous weather outlook, Sep 23, 12:04 PM CST, 29 minutes before
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</html>Flash Flood, Ouachita
- When
- September 23, 12:33 PM CST to 1:45 PM CST
- Where
- Ouachita County, 0.97 mi SSW of Sterlington to 0.4 mi S of Sterlington
- Cause
- Heavy Rain
- Reported by
- Law Enforcement
- Coordinates
- 32.688, -92.088
Street flooding was reported throughout the city of Sterlington.
- 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.
- Flash Flooding and Flood in Mississippi, September 23 to 24, 2020$256,000 · 50 kt wind · 9 events
- Flash Flooding and Flood in Arkansas, September 23, 2020$26,000 · 3 events
- Coastal Flood in Puerto Rico, September 23 to 25, 20203 events
- Heavy Rain in Oregon, September 23 to 25, 20203 events
- Hail in Minnesota, September 23, 20201 in hail · 3 events
- Flash Flooding in Texas, September 23, 20202 events
- Flash Flood and Heavy Rain in Arkansas, September 23, 20202 events
- Waterspouts in South Atlantic Coastal Waters, September 23, 20202 events
- Heavy Rain in Washington, September 23 to 25, 20202 events
- Heavy Rain in Hawaii, September 23, 20202 events
- Damaging Winds in Wisconsin, September 23, 202052 kt wind · 2 events
- Coastal Flood in New Hampshire, September 23, 2020$5,000 · 1 event
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 2026-09-24. Each event’s entry at NCEI: 913737.