Alert archive / Louisiana / Flash Flood Warnings in 2024

Flash Flood Warning 46, NWS New Orleans, LA

April 10, 2024Saint Tammany Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Apr 10, 2024, 12:48 PM CDT for Saint Tammany Parish, Louisiana. It was in force for 110 min. 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 10, 2024, 12:48 PM CDT (17:48 UTC)
Expired: Apr 10, 2024, 2:38 PM CDT
In force: 110 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Saint Tammany Parish, LA

The radar

The Hammond radar (KHDC), 45 km from the middle of the area, began a volume at 17:51 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, 5.8 hours before the alert went out and 30 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: 1088 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 479 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 220 m²/s²
0-3 km storm-relative helicity: 327 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.0

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 10, 12:35 PM CDT, 13 minutes earlier.

Area forecast discussion, Apr 10, 12:35 PM CDT, 13 minutes before

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In the hours before

Local storm report, Apr 10, 11:45 AM CDT, 1 hour 3 minutes before

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Special weather statement, Apr 10, 12:00 PM CDT, 48 minutes before

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Local storm report, Apr 10, 12:02 PM CDT, 46 minutes before

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Special weather statement, Apr 10, 12:18 PM CDT, 30 minutes before

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Local storm report, Apr 10, 12:21 PM CDT, 27 minutes before

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Local storm report, Apr 10, 12:33 PM CDT, 15 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 9, 8:28 PM CDT	River Flood Warning	LIX	Washington	4 days
Apr 9, 8:28 PM CDT	River Flood Warning	LIX	Saint Tammany	21 days
Apr 10, 5:26 AM CDT	Special Weather Statement	LIX	Assumption, Saint James	34 min
Apr 10, 5:51 AM CDT	Severe Thunderstorm Warning	LIX	Assumption, Saint James	54 min
Apr 10, 6:23 AM CDT	Severe Thunderstorm Warning	LIX	Ascension, Livingston, Saint James, Saint John the Baptist	67 min
Apr 10, 6:44 AM CDT	Severe Thunderstorm Warning	LIX	Iberville, Pointe Coupee, West Baton Rouge	46 min
Apr 10, 6:55 AM CDT	Tornado Warning	LIX	Iberville, Pointe Coupee, West Baton Rouge	25 min
Apr 10, 7:17 AM CDT	Severe Thunderstorm Warning	LIX	Lafourche, Saint James, Saint John the Baptist	43 min
Apr 10, 7:32 AM CDT	Flash Flood Warning	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard	4 hr
Apr 10, 7:45 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LIX	East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, West Baton Rouge, West Feliciana	60 min
Apr 10, 7:50 AM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Lafourche, Saint Charles	40 min
Apr 10, 8:02 AM CDT	Severe Thunderstorm Warning	LIX	Ascension, Assumption, Lafourche, Livingston, Saint Charles, Saint James and 1 more	43 min
Apr 10, 8:06 AM CDT	Tornado Warning Considerable damage threat	LIX	East Feliciana, Pointe Coupee, West Feliciana	24 min
Apr 10, 8:24 AM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles	66 min
Apr 10, 8:35 AM CDT	Severe Thunderstorm Warning Destructive damage threat	LIX	Livingston, Saint Helena, Tangipahoa, Washington	55 min
Apr 10, 8:41 AM CDT	Flash Flood Warning	LIX	Ascension, Livingston, Saint Charles, Saint James, Saint John the Baptist	3 hr
Apr 10, 8:41 AM CDT	Tornado Warning	LIX	Saint Tammany	28 min
Apr 10, 8:54 AM CDT	Flash Flood Warning	LIX	East Baton Rouge, East Feliciana, Pointe Coupee, West Baton Rouge, West Feliciana	3 hr
Apr 10, 9:00 AM CDT	Flash Flood Warning	LIX	Saint Tammany	3 hr
Apr 10, 9:05 AM CDT	Special Marine Warning	LIX		55 min
Apr 10, 9:05 AM CDT	Severe Thunderstorm Warning	LIX	Ascension, Assumption, Lafourche, Livingston, Saint Charles, Saint James and 1 more	55 min
Apr 10, 9:14 AM CDT	Flash Flood Warning Emergency	LIX	Tangipahoa	5 hr
Apr 10, 9:20 AM CDT	Severe Thunderstorm Warning	LIX	Tangipahoa, Washington	55 min
Apr 10, 9:23 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LIX	Orleans, Saint Tammany, Tangipahoa, Washington	82 min
Apr 10, 9:26 AM CDT	Flash Flood Warning	LIX	Saint Tammany	3 hr
Apr 10, 9:40 AM CDT	Flash Flood Warning Considerable damage threat	LIX	Ascension, Assumption, East Baton Rouge, Iberville, Livingston, Saint James	3 hr
Apr 10, 9:53 AM CDT	Tornado Warning	LIX	Saint Tammany	52 min
Apr 10, 9:57 AM CDT	Special Marine Warning	LIX		48 min
Apr 10, 9:59 AM CDT	Severe Thunderstorm Warning Destructive damage threat	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles, Saint Tammany	46 min
Apr 10, 10:08 AM CDT	Tornado Warning	LIX	Saint Tammany	52 min
Apr 10, 10:31 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LIX	Orleans, Saint Tammany	59 min
Apr 10, 10:42 AM CDT	Flash Flood Warning	LIX	Jefferson, Lafourche, Saint Charles, Saint John the Baptist	3 hr
Apr 10, 10:50 AM CDT	Special Marine Warning	LIX		115 min
Apr 10, 10:55 AM CDT	Flash Flood Warning EmergencyCatastrophic damage threat	LIX	Jefferson, Orleans, Saint Bernard	3 hr
Apr 10, 11:03 AM CDT	Special Weather Statement	LIX	Saint James	12 min
Apr 10, 11:06 AM CDT	Flash Flood Warning	LIX	Saint Tammany	3 hr
Apr 10, 11:54 AM CDT	Flash Flood Warning Considerable damage threat	LIX	Jefferson, Orleans	6 hr
Apr 10, 12:00 PM CDT	Special Weather Statement	LIX	Assumption	15 min
Apr 10, 12:05 PM CDT	Flash Flood Warning	LIX	Saint Tammany, Tangipahoa	3 hr
Apr 10, 12:12 PM CDT	Flash Flood Warning Considerable damage threat	LIX	Ascension, Livingston, Saint Charles, Saint James, Saint John the Baptist	114 min
Apr 10, 12:18 PM CDT	Special Weather Statement	LIX	Ascension, Livingston	42 min
Apr 10, 12:45 PM CDT	Flash Flood Warning EmergencyCatastrophic damage threat	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles	2 hr
Apr 10, 12:55 PM CDT	Special Weather Statement	LIX	Jefferson, Lafourche	50 min
Apr 10, 1:32 PM CDT	Special Marine Warning	LIX		58 min
Apr 10, 1:42 PM CDT	River Flood Warning	LIX	Saint Tammany	23 hr
Apr 10, 1:42 PM CDT	River Flood Warning	LIX	Tangipahoa	23 hr
Apr 10, 1:42 PM CDT	River Flood Warning	LIX	Saint Tammany	7 hr
Apr 10, 1:42 PM CDT	River Flood Warning	LIX	Saint Tammany	9 hr
Apr 10, 2:10 PM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans, Saint Bernard	3 hr
Apr 10, 2:50 PM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles	55 min
Apr 10, 3:31 PM CDT	Small Craft Advisory	LIX		13 hr
Apr 9, 8:28 PM CDT	River Flood Warning	LIX	Pike, Walthall	68 hr
Apr 10, 8:30 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LIX	Amite, Wilkinson	45 min
Apr 10, 8:39 AM CDT	Special Weather Statement	LIX	Hancock	51 min
Apr 10, 9:11 AM CDT	Special Weather Statement	LIX	Harrison, Jackson, Pearl River	34 min
Apr 10, 10:27 AM CDT	Tornado Warning Tornado observed	LIX	Hancock, Harrison	33 min
Apr 10, 10:56 AM CDT	Tornado Warning	LIX	Harrison, Jackson	49 min
Apr 10, 11:13 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LIX	Jackson	47 min
Apr 10, 11:20 AM CDT	Flash Flood Warning	LIX	Hancock, Pearl River	3 hr
Apr 10, 11:29 AM CDT	Flash Flood Warning	LIX	Harrison, Jackson	6 hr
Apr 10, 1:42 PM CDT	River Flood Warning	LIX	Pearl River	53 hr
Apr 10, 1:42 PM CDT	River Flood Warning	LIX	Pearl River	55 hr
Apr 10, 3:39 PM CDT	River Flood Warning	LIX	Harrison	49 hr
Apr 10, 3:39 PM CDT	River Flood Warning	LIX	Harrison	51 hr
Apr 10, 3:39 PM CDT	River Flood Warning	LIX	Hancock	5 hr
Apr 10, 3:39 PM CDT	River Flood Warning	LIX	Harrison	56 hr

Nearby

Flash Flood Warnings in Louisiana, 2024 Every flash flood warning in 2024

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.