Alert archive / Louisiana / Flash Flood Warnings in 2023

Flash Flood Warning 3, NWS New Orleans, LA

January 29, 2023Livingston Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Jan 29, 2023, 11:04 AM CST for Livingston 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: Jan 29, 2023, 11:04 AM CST (17:04 UTC)
Expired: Jan 29, 2023, 2:15 PM CST
In force: 3 hr
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

County Livingston Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 5.1 hours before the alert went out and 101 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 721 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 292 m²/s²
0-3 km storm-relative helicity: 332 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jan 29, 8:40 AM CST, 2 hours 24 minutes earlier.

Area forecast discussion, Jan 29, 8:40 AM CST, 2 hours 24 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
Jan 29, 2:30 AM CST	Flood Watch	LIX	Ascension, East Baton Rouge, East Feliciana, Iberville, Livingston, Pointe Coupee and 6 more	22 hr
Jan 29, 9:46 AM CST	Flash Flood Warning	LIX	East Baton Rouge	4 hr
Jan 29, 11:15 AM CST	Flash Flood Warning	LIX	Tangipahoa	3 hr
Jan 29, 12:05 PM CST	Areal Flood Advisory	LIX	Saint Tammany, Tangipahoa, Washington	3 hr
Jan 29, 1:49 PM CST	Areal Flood Warning	LIX	Ascension, East Baton Rouge, Livingston, West Baton Rouge	3 hr
Jan 29, 2:47 PM CST	River Flood Warning	LIX	East Baton Rouge	28 hr
Jan 29, 2:49 PM CST	River Flood Warning	LIX	Saint Tammany	53 hr
Jan 29, 2:49 PM CST	River Flood Warning	LIX	Saint Tammany	29 hr
Jan 29, 2:54 PM CST	River Flood Warning	LIX	Saint Tammany	4 days
Jan 29, 2:54 PM CST	River Flood Warning	LIX	Livingston	4 days
Jan 29, 2:55 PM CST	River Flood Warning	LIX	Tangipahoa	21 hr
Jan 29, 2:57 PM CST	River Flood Warning	LIX	Saint Tammany	52 hr
Jan 29, 3:22 PM CST	Areal Flood Warning	LIX	East Baton Rouge, Livingston	113 min
Jan 29, 4:15 PM CST	Dense Fog Advisory	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard, Saint John the Baptist, Saint Tammany and 1 more	19 hr
Jan 29, 4:16 PM CST	Marine Dense Fog Advisory	LIX		19 hr
Jan 29, 11:28 AM CST	Areal Flood Advisory	LIX	Pearl River	45 min
Jan 29, 12:13 PM CST	Flash Flood Warning	LIX	Pearl River	77 min
Jan 29, 4:34 PM CST	River Flood Warning	LIX	Pearl River	51 hr

Nearby

Flash Flood Warnings in Louisiana, 2023 Every flash flood warning in 2023

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.