Alert archive / Louisiana / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 56, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Apr 15, 2023, 10:41 AM CDT for 6 parishes in Louisiana. It was in force for 64 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 15, 2023, 10:41 AM CDT (15:41 UTC)
- Expired
- Apr 15, 2023, 11:45 AM CDT
- In force
- 64 min
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Pointe Coupee Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 3.7 hours before the alert went out and 159 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.
- Mixed-layer CAPE
- 529 J/kg
- Mixed-layer CIN
- -323 J/kg
- Mixed-layer LCL
- 915 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 158 m²/s²
- 0-3 km storm-relative helicity
- 214 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Apr 15, 6:49 AM CDT, 3 hours 52 minutes earlier.
Area forecast discussion, Apr 15, 6:49 AM CDT, 3 hours 52 minutes before
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</html>In the hours before
Special weather statement, Apr 15, 10:04 AM CDT, 37 minutes before
Special Weather Statement
National Weather Service New Orleans LA
1004 AM CDT Sat Apr 15 2023
LAZ034>036-MSZ068-069-151600-
East Feliciana LA-Pointe Coupee LA-West Feliciana LA-Wilkinson MS-
Amite MS-
1004 AM CDT Sat Apr 15 2023
...A strong thunderstorm will impact portions of West Feliciana,
northwestern Pointe Coupee and northwestern East Feliciana Parishes,
Wilkinson and western Amite Counties through 1100 AM CDT...
At 1004 AM CDT, Doppler radar was tracking a strong thunderstorm near
Simmesport, moving northeast at 35 mph.
HAZARD...Wind gusts up to 50 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Jackson, St. Francisville, Liberty, Centreville, Woodville, Gloster,
Morganza, Wilson, Norwood, Wakefield, Spillman, Batchelor,
Lettsworth, Fort Adams, Dolorosa and Crosby.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3132 9112 3135 9102 3135 9083 3105 9079
3061 9175 3071 9173 3086 9182 3087 9180
3097 9181 3104 9172 3104 9165 3097 9166
3104 9156 3114 9163 3124 9156 3122 9151
3124 9148 3128 9149 3132 9146 3137 9123
TIME...MOT...LOC 1504Z 235DEG 29KT 3095 9177
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH
MEFFERSpecial weather statement, Apr 15, 10:27 AM CDT, 14 minutes before
Special Weather Statement
National Weather Service New Orleans LA
1027 AM CDT Sat Apr 15 2023
LAZ034>037-046>048-083-085-151615-
Iberville LA-Northern Livingston LA-St. Helena LA-East Feliciana LA-
Western Ascension LA-Pointe Coupee LA-West Baton Rouge LA-
East Baton Rouge LA-West Feliciana LA-
1027 AM CDT Sat Apr 15 2023
...A strong thunderstorm will impact portions of northwestern
Ascension, southeastern West Feliciana, West Baton Rouge,
southwestern St. Helena, southern Pointe Coupee, northwestern
Livingston, central East Feliciana, Iberville and East Baton Rouge
Parishes through 1115 AM CDT...
At 1027 AM CDT, Doppler radar was tracking a strong thunderstorm near
Lottie, or near Krotz Springs, moving northeast at 45 mph.
HAZARD...Wind gusts up to 50 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Baton Rouge, Zachary, Baker, Denham Springs, Gonzales, Plaquemine,
Port Allen, New Roads, Jackson, St. Francisville, Clinton, Oak Hills
Place, St. Gabriel, Walker, Addis, Brusly, Livonia, Maringouin,
Slaughter and Fordoche.
This includes the following Interstates...
Interstate 10 in Louisiana between mile markers 128 and 176.
Interstate 12 between mile markers 1 and 16.
Interstate 110 in Louisiana between mile markers 1 and 8.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3093 9105 3076 9086 3026 9086 3011 9147
3019 9147 3020 9149 3023 9148 3024 9157
3026 9159 3036 9164 3038 9163 3044 9164
3050 9173 3056 9176 3061 9176
TIME...MOT...LOC 1527Z 242DEG 41KT 3049 9166
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH
MEFFERThe office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 9:39 AM CDT | Special Marine Warning | LIX | 96 min | |
| Apr 15, 10:04 AM CDT | Special Weather Statement | LIX | Pointe Coupee, West Feliciana | 56 min |
| Apr 15, 10:27 AM CDT | Special Weather Statement | LIX | East Baton Rouge, East Feliciana, Iberville, West Baton Rouge | 48 min |
| Apr 15, 11:09 AM CDT | Special Marine Warning | LIX | 66 min | |
| Apr 15, 11:10 AM CDT | Special Weather Statement | LIX | Lafourche, Terrebonne | 50 min |
| Apr 15, 11:16 AM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, East Feliciana, Livingston, Saint Helena, Tangipahoa | 44 min |
| Apr 15, 11:29 AM CDT | Special Marine Warning | LIX | 61 min | |
| Apr 15, 11:40 AM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, Livingston | 27 min |
| Apr 15, 11:43 AM CDT | Special Marine Warning | LIX | 70 min | |
| Apr 15, 11:57 AM CDT | Flash Flood Warning | LIX | Ascension, East Baton Rouge, Livingston | 2 hr |
| Apr 15, 12:00 PM CDT | Special Weather Statement | LIX | Tangipahoa, Washington | 30 min |
| Apr 15, 12:03 PM CDT | Special Weather Statement | LIX | Ascension, Assumption, Saint James | 57 min |
| Apr 15, 12:15 PM CDT | Special Weather Statement | LIX | Jefferson, Lafourche, Plaquemines | 60 min |
| Apr 15, 12:22 PM CDT | Special Marine Warning | LIX | 83 min | |
| Apr 15, 12:31 PM CDT | Areal Flood Advisory | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles, Saint James and 1 more | 119 min |
| Apr 15, 12:37 PM CDT | Special Weather Statement | LIX | Saint Charles, Saint John the Baptist | 38 min |
| Apr 15, 12:45 PM CDT | Special Weather Statement | LIX | Saint Tammany | 45 min |
| Apr 15, 12:51 PM CDT | Special Marine Warning | LIX | 54 min | |
| Apr 15, 1:04 PM CDT | Severe Thunderstorm Warning | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles | 41 min |
| Apr 15, 1:07 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany | 38 min |
| Apr 15, 1:23 PM CDT | Special Marine Warning | LIX | 67 min | |
| Apr 15, 1:38 PM CDT | Severe Thunderstorm Warning | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Tammany | 37 min |
| Apr 15, 1:45 PM CDT | Special Marine Warning | LIX | 60 min | |
| Apr 15, 2:21 PM CDT | Special Marine Warning | LIX | 24 min | |
| Apr 15, 2:39 PM CDT | Special Marine Warning | LIX | 27 min | |
| Apr 15, 2:40 PM CDT | Small Craft Advisory | LIX | 40 hr | |
| Apr 15, 5:36 PM CDT | Special Weather Statement | LIX | Jefferson | 39 min |
| Apr 15, 6:31 PM CDT | Special Weather Statement | LIX | Terrebonne | 29 min |
| Apr 15, 11:01 AM CDT | Special Weather Statement | LIX | Amite, Pike | 44 min |
| Apr 15, 11:36 AM CDT | Severe Thunderstorm Warning | LIX | Amite, Pike, Walthall | 39 min |
| Apr 15, 12:13 PM CDT | Special Weather Statement | LIX | Walthall | 32 min |
| Apr 15, 2:12 PM CDT | Severe Thunderstorm Warning | LIX | Harrison, Jackson | 63 min |
| Apr 15, 6:04 PM CDT | River Flood Warning | LIX | Pearl River | 108 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2023Every 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.