Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 112, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Apr 23, 2021, 9:35 PM CDT for Catahoula Parish, Concordia Parish, Louisiana. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 23, 2021, 9:35 PM CDT (02:35 UTC)
- Expired
- Apr 23, 2021, 10:11 PM CDT
- In force
- 36 min
- Issued by
- NWS Jackson, MS
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Catahoula Parish, LA, Concordia Parish, LA
The radar
The Ft Polk radar (KPOE), 101 km from the middle of the area, began a volume at 02:36 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 23, 8:30 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 2.6 hours before the alert went out and 178 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
- 865 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 546 m above ground
- 0-6 km bulk shear
- 87 kt
- 0-1 km storm-relative helicity
- 383 m²/s²
- 0-3 km storm-relative helicity
- 442 m²/s²
- Significant tornado parameter
- 2.4
- Supercell composite
- 10.3
The text
As transmitted.
406
WUUS54 KJAN 240235
SVRJAN
LAC025-029-240330-
/O.NEW.KJAN.SV.W.0112.210424T0235Z-210424T0330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jackson MS
935 PM CDT Fri Apr 23 2021
The National Weather Service in Jackson has issued a
* Severe Thunderstorm Warning for...
Northwestern Concordia Parish in northeastern Louisiana...
Southwestern Catahoula Parish in northeastern Louisiana...
* Until 1030 PM CDT.
* At 934 PM CDT, a severe thunderstorm was located 7 miles east of
Deville, or 7 miles west of Larto, moving east at 40 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* This severe thunderstorm will be near...
Larto around 945 PM CDT.
Mayna and Acme around 950 PM CDT.
New Era around 955 PM CDT.
Monterey around 1005 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
A Tornado Watch remains in effect until 400 AM CDT for northeastern
Louisiana.
LAT...LON 3130 9201 3130 9200 3133 9201 3148 9201
3159 9166 3132 9156 3124 9181 3125 9181
3129 9189 3130 9193 3127 9195 3123 9192
3122 9194 3124 9196 3123 9199 3124 9201
3125 9199 3126 9201 3127 9199 3128 9202
TIME...MOT...LOC 0234Z 251DEG 33KT 3133 9203
HAIL...1.00IN
WIND...60MPH
$$
TW2 follow-up statements
875
WWUS54 KJAN 240259
SVSJAN
Severe Weather Statement
National Weather Service Jackson MS
959 PM CDT Fri Apr 23 2021
LAC025-240307-
/O.CAN.KJAN.SV.W.0112.000000T0000Z-210424T0330Z/
Catahoula LA-
959 PM CDT Fri Apr 23 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CATAHOULA PARISH
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 400 AM CDT for northeastern
Louisiana.
LAT...LON 3136 9186 3138 9184 3139 9178 3142 9185
3149 9186 3150 9185 3149 9183 3144 9181
3143 9173 3144 9172 3146 9173 3148 9180
3152 9178 3155 9180 3159 9166 3132 9156
3124 9181 3126 9184 3129 9182 3131 9187
TIME...MOT...LOC 0257Z 251DEG 33KT 3140 9179
$$
LAC029-240330-
/O.CON.KJAN.SV.W.0112.000000T0000Z-210424T0330Z/
Concordia LA-
959 PM CDT Fri Apr 23 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR NORTHWESTERN CONCORDIA PARISH...
At 957 PM CDT, a severe thunderstorm was located near New Era, or
near Monterey, moving east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
This severe storm will be near...
Monterey around 1005 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
A Tornado Watch remains in effect until 400 AM CDT for northeastern
Louisiana.
LAT...LON 3136 9186 3138 9184 3139 9178 3142 9185
3149 9186 3150 9185 3149 9183 3144 9181
3143 9173 3144 9172 3146 9173 3148 9180
3152 9178 3155 9180 3159 9166 3132 9156
3124 9181 3126 9184 3129 9182 3131 9187
TIME...MOT...LOC 0257Z 251DEG 33KT 3140 9179
HAIL...<.75IN
WIND...60MPH
$$
TW903
WWUS54 KJAN 240311
SVSJAN
Severe Weather Statement
National Weather Service Jackson MS
1011 PM CDT Fri Apr 23 2021
LAC029-240320-
/O.CAN.KJAN.SV.W.0112.000000T0000Z-210424T0330Z/
Concordia LA-
1011 PM CDT Fri Apr 23 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CONCORDIA PARISH
IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 400 AM CDT for northeastern
Louisiana.
LAT...LON 3136 9186 3138 9184 3139 9178 3142 9185
3149 9186 3150 9185 3149 9183 3144 9181
3143 9173 3144 9172 3146 9173 3148 9180
3152 9178 3155 9180 3159 9166 3132 9156
3124 9181 3126 9184 3129 9182 3131 9187
TIME...MOT...LOC 0309Z 251DEG 33KT 3144 9165
$$
TWThe office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 7:20 PM CDT | Special Weather Statement | JAN | Catahoula, Concordia | 40 min |
| Apr 23, 7:30 PM CDT | Severe Thunderstorm Warning | JAN | Catahoula, Concordia | 45 min |
| Apr 23, 7:55 PM CDT | Severe Thunderstorm Warning | JAN | Catahoula, Concordia, Tensas | 29 min |
| Apr 23, 8:03 PM CDT | Special Weather Statement | JAN | Concordia | 27 min |
| Apr 23, 11:38 PM CDT | Special Weather Statement | JAN | West Feliciana | 22 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2021Every severe thunderstorm warning in 2021
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.