Alert archive / Louisiana / Flash Flood Warnings in 2026

Flash Flood Warning 26, NWS New Orleans, LA

May 8, 2026Saint Tammany Parish, Tangipahoa Parish, Washington Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at May 8, 2026, 1:54 PM CDT for Saint Tammany Parish, Tangipahoa Parish, Washington Parish, Louisiana. It was in force for 2 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: May 8, 2026, 1:54 PM CDT (18:54 UTC)
Expired: May 8, 2026, 3:57 PM CDT
In force: 2 hr
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

Counties Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA

The radar

The Hammond radar (KHDC), 29 km from the middle of the area, began a volume at 18:55 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, 6.9 hours before the alert went out and 59 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: 1 J/kg
Mixed-layer CIN: -432 J/kg
Mixed-layer LCL: 562 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 162 m²/s²
0-3 km storm-relative helicity: 171 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.8

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 May 8, 1:14 PM CDT, 40 minutes earlier.

Area forecast discussion, May 8, 1:14 PM CDT, 40 minutes before

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In the hours before

Local storm report, May 8, 12:43 PM CDT, 1 hour 11 minutes before

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Local storm report, May 8, 12:56 PM CDT, 58 minutes before

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Local storm report, May 8, 12:58 PM CDT, 56 minutes before

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Local storm report, May 8, 1:36 PM CDT, 18 minutes before

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Special weather statement, May 8, 1:47 PM CDT, 7 minutes before

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Local storm report, May 8, 1:53 PM CDT, 1 minute 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
May 8, 8:16 AM CDT	River Flood Warning	LIX	Washington	6 days
May 8, 8:16 AM CDT	River Flood Warning	LIX	Saint Tammany	9 days
May 8, 8:18 AM CDT	Special Weather Statement	LIX	East Feliciana, West Feliciana	42 min
May 8, 8:34 AM CDT	Severe Thunderstorm Warning	LIX	Pointe Coupee, West Feliciana	41 min
May 8, 8:40 AM CDT	Severe Thunderstorm Warning	LIX	East Feliciana, West Feliciana	50 min
May 8, 9:12 AM CDT	Severe Thunderstorm Warning	LIX	East Feliciana, West Feliciana	48 min
May 8, 9:24 AM CDT	Severe Thunderstorm Warning	LIX	East Feliciana, Saint Helena, Tangipahoa	51 min
May 8, 9:34 AM CDT	Special Weather Statement	LIX	Washington	26 min
May 8, 9:56 AM CDT	Special Weather Statement	LIX	East Feliciana	34 min
May 8, 10:03 AM CDT	Special Weather Statement	LIX	Washington	42 min
May 8, 11:24 AM CDT	Special Weather Statement	LIX	Iberville	36 min
May 8, 11:53 AM CDT	Areal Flood Advisory	LIX	Iberville, Pointe Coupee, West Baton Rouge	54 min
May 8, 11:57 AM CDT	Special Weather Statement	LIX	Ascension	48 min
May 8, 12:19 PM CDT	Flash Flood Warning	LIX	Ascension, East Baton Rouge, Iberville, Livingston, Tangipahoa, West Baton Rouge	4 hr
May 8, 12:47 PM CDT	Flash Flood Warning	LIX	Iberville, Pointe Coupee, West Baton Rouge	3 hr
May 8, 1:31 PM CDT	Areal Flood Advisory	LIX	Saint Tammany, Tangipahoa, Washington	23 min
May 8, 1:47 PM CDT	Special Weather Statement	LIX	Ascension, Livingston, Saint James, Saint John the Baptist	43 min
May 8, 2:57 PM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Lafourche, Orleans, Plaquemines, Saint Charles, Saint James and 1 more	63 min
May 8, 3:20 PM CDT	Flash Flood Warning	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles	109 min
May 8, 3:20 PM CDT	Special Marine Warning	LIX		40 min
May 8, 4:10 PM CDT	Special Weather Statement	LIX	Jefferson	65 min
May 8, 5:03 PM CDT	Special Marine Warning	LIX		57 min
May 8, 5:06 PM CDT	Special Marine Warning	LIX		66 min
May 8, 5:12 PM CDT	Special Weather Statement	LIX	Plaquemines	63 min
May 8, 10:19 AM CDT	Severe Thunderstorm Warning	LIX	Pearl River	41 min
May 8, 11:02 AM CDT	Special Weather Statement	LIX	Pearl River	43 min
May 8, 11:29 AM CDT	Severe Thunderstorm Warning	LIX	Pearl River	13 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.