Alert archive / Louisiana / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 129, NWS New Orleans, LA

June 15, 2023Saint Tammany Parish, Tangipahoa Parish, Washington Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Jun 15, 2023, 2:33 PM CDT for Saint Tammany Parish, Tangipahoa Parish, Washington Parish, Louisiana. It was in force for 42 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: Jun 15, 2023, 2:33 PM CDT (19:33 UTC)
Expired: Jun 15, 2023, 3:15 PM CDT
In force: 42 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 15, 9:41 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.6 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: 3403 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 672 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 216 m²/s²
Significant tornado parameter: 2.5
Supercell composite: 12.4

Open this sounding in Storm Lab

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 3:49 AM CDT	Small Craft Advisory	LIX		15 hr
Jun 15, 1:00 PM CDT	Special Weather Statement	LIX	Livingston	45 min
Jun 15, 1:01 PM CDT	Special Weather Statement	LIX	Washington	44 min
Jun 15, 1:10 PM CDT	Severe Thunderstorm Warning	LIX	Tangipahoa, Washington	50 min
Jun 15, 1:23 PM CDT	Severe Thunderstorm Warning	LIX	Livingston, Tangipahoa	52 min
Jun 15, 1:32 PM CDT	Excessive Heat Watch	LIX	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 13 more	14 hr
Jun 15, 1:47 PM CDT	Special Marine Warning	LIX		58 min
Jun 15, 1:56 PM CDT	Severe Thunderstorm Warning	LIX	Washington	33 min
Jun 15, 2:48 PM CDT	Special Marine Warning	LIX		45 min
Jun 15, 2:57 PM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard	52 min
Jun 15, 3:09 PM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany	36 min
Jun 15, 12:25 PM CDT	Severe Thunderstorm Warning	LIX	Amite, Pike, Walthall	50 min
Jun 15, 1:32 PM CDT	Heat Advisory	LIX	Amite, Hancock, Harrison, Jackson, Pearl River, Pike and 2 more	29 hr

Nearby

Severe Thunderstorm Warnings in Louisiana, 2023 Every severe thunderstorm 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.