Alert archive / Louisiana / Flash Flood Warnings in 2026

Flash Flood Warning 22, NWS New Orleans, LA

April 30, 2026East Baton Rouge Parish, Livingston Parish, West Baton Rouge Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Apr 30, 2026, 4:51 PM CDT for East Baton Rouge Parish, Livingston Parish, West Baton Rouge Parish, Louisiana. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 30, 2026, 4:51 PM CDT (21:51 UTC)
Expired: Apr 30, 2026, 8:00 PM CDT
In force: 3 hr
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

Counties East Baton Rouge Parish, LA, Livingston Parish, LA, West Baton Rouge Parish, LA

The radar

The Hammond radar (KHDC), 61 km from the middle of the area, began a volume at 21:55 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 9.9 hours before the alert went out and 132 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 163 J/kg
Mixed-layer CIN: -149 J/kg
Mixed-layer LCL: 1055 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 147 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS New Orleans, LA wrote its last area forecast discussion before this flash flood warning went out at Apr 30, 1:19 PM CDT, 3 hours 32 minutes earlier.

Area forecast discussion, Apr 30, 1:19 PM CDT, 3 hours 32 minutes before

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In the hours before

Special weather statement, Apr 30, 12:15 PM CDT, 4 hours 36 minutes before

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Special weather statement, Apr 30, 12:39 PM CDT, 4 hours 12 minutes before

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Special weather statement, Apr 30, 12:42 PM CDT, 4 hours 9 minutes before

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Special weather statement, Apr 30, 4:22 PM CDT, 29 minutes before

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Special weather statement, Apr 30, 4:31 PM CDT, 20 minutes before

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Special weather statement, Apr 30, 4:32 PM CDT, 19 minutes before

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The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 29, 7:15 PM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany	45 min
Apr 29, 8:07 PM CDT	Special Marine Warning	LIX		38 min
Apr 30, 9:16 AM CDT	River Flood Warning	LIX	Tangipahoa	3 days
Apr 30, 11:14 AM CDT	Special Weather Statement	LIX	Saint Charles	31 min
Apr 30, 11:47 AM CDT	Special Weather Statement	LIX	Saint Charles	28 min
Apr 30, 12:15 PM CDT	Special Weather Statement	LIX	Lafourche	30 min
Apr 30, 12:17 PM CDT	Special Marine Warning	LIX		28 min
Apr 30, 12:39 PM CDT	Special Weather Statement	LIX	Saint Bernard	36 min
Apr 30, 12:42 PM CDT	Special Weather Statement	LIX	Jefferson	33 min
Apr 30, 4:13 PM CDT	Areal Flood Advisory	LIX	Ascension, East Baton Rouge, Iberville, Livingston, West Baton Rouge	3 hr
Apr 30, 4:22 PM CDT	Special Weather Statement	LIX	Saint John the Baptist	38 min
Apr 30, 4:31 PM CDT	Special Weather Statement	LIX	Iberville	29 min
Apr 30, 4:32 PM CDT	Special Weather Statement	LIX	Saint James	28 min
Apr 30, 4:57 PM CDT	Special Weather Statement	LIX	Saint Charles	33 min
Apr 30, 5:28 PM CDT	Special Weather Statement	LIX	Saint Charles	32 min
Apr 30, 5:30 PM CDT	Special Weather Statement	LIX	Assumption	30 min
Apr 30, 5:46 PM CDT	Special Weather Statement	LIX	Saint Charles	29 min
Apr 30, 5:57 PM CDT	Special Weather Statement	LIX	Saint Charles	33 min
Apr 30, 6:00 PM CDT	Special Marine Warning	LIX		30 min
Apr 30, 6:02 PM CDT	Special Weather Statement	LIX	Assumption	28 min
Apr 30, 6:15 PM CDT	Special Weather Statement	LIX	Saint Charles	30 min
Apr 30, 6:26 PM CDT	Special Marine Warning	LIX		42 min
Apr 30, 6:30 PM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans, Saint Charles	3 hr
Apr 30, 6:37 PM CDT	Special Weather Statement	LIX	Jefferson	38 min
Apr 29, 7:49 PM CDT	Severe Thunderstorm Warning	LIX	Hancock, Harrison	17 min
Apr 29, 8:07 PM CDT	Special Weather Statement	LIX	Harrison	53 min

Nearby

Flash Flood Warnings in Louisiana, 2026 Every flash flood warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.