Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 110, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Apr 23, 2021, 7:30 PM CDT for Catahoula Parish, Concordia Parish, Louisiana. It was in force for 45 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 23, 2021, 7:30 PM CDT (00:30 UTC)
- Expired
- Apr 23, 2021, 8:15 PM CDT
- In force
- 45 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), 109 km from the middle of the area, began a volume at 00:31 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 23, 7:35 PM CDT | HAIL 1.75 | 7 N Larto, LA | HAIL UP TO THE SIZE OF GOLF BALLS FELL NORTH OF THE LARTO AREA. REPORT RELAYED VIA SHERIFFS OFFICE. TIME ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 0.5 hours before the alert went out and 193 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.
939
WUUS54 KJAN 240030
SVRJAN
LAC025-029-240115-
/O.NEW.KJAN.SV.W.0110.210424T0030Z-210424T0115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jackson MS
730 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...
Catahoula Parish in northeastern Louisiana...
* Until 815 PM CDT.
* At 730 PM CDT, a severe thunderstorm was located near Mayna, or
near Larto, moving northeast at 50 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...
Monterey and Jonesville around 745 PM CDT.
Wildsville around 750 PM CDT.
Frogmore around 755 PM CDT.
Ferriday around 800 PM CDT.
Other locations impacted by this severe thunderstorm include
Harrisonburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3132 9200 3174 9201 3186 9171 3153 9151
3152 9152 3151 9152 3126 9200 3128 9200
3128 9201 3129 9201 3130 9200 3130 9202
TIME...MOT...LOC 0030Z 238DEG 42KT 3144 9194
HAIL...1.00IN
WIND...60MPH
$$
TW4 follow-up statements
252
WWUS54 KJAN 240041
SVSJAN
Severe Weather Statement
National Weather Service Jackson MS
741 PM CDT Fri Apr 23 2021
LAC025-029-240115-
/O.CON.KJAN.SV.W.0110.000000T0000Z-210424T0115Z/
Concordia LA-Catahoula LA-
741 PM CDT Fri Apr 23 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR NORTHWESTERN CONCORDIA AND CENTRAL CATAHOULA PARISHES...
At 741 PM CDT, a severe thunderstorm was located near Mayna, or near
Monterey, moving northeast at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
This severe storm will be near...
Wildsville around 750 PM CDT.
Frogmore around 755 PM CDT.
Ferriday around 800 PM CDT.
Other locations impacted by this severe thunderstorm include
Harrisonburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3174 9201 3186 9171 3153 9151 3152 9152
3151 9152 3134 9185
TIME...MOT...LOC 0041Z 238DEG 42KT 3151 9181
HAIL...1.00IN
WIND...60MPH
$$
TW057
WWUS54 KJAN 240051
SVSJAN
Severe Weather Statement
National Weather Service Jackson MS
751 PM CDT Fri Apr 23 2021
LAC025-029-240115-
/O.CON.KJAN.SV.W.0110.000000T0000Z-210424T0115Z/
Concordia LA-Catahoula LA-
751 PM CDT Fri Apr 23 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR NORTHWESTERN CONCORDIA AND NORTHEASTERN CATAHOULA PARISHES...
At 751 PM CDT, a severe thunderstorm was located over Frogmore, or 8
miles southwest of Ferriday, moving northeast at 50 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 storm will be near...
Ferriday around 800 PM CDT.
Other locations impacted by this severe thunderstorm include
Harrisonburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3180 9185 3186 9171 3153 9151 3152 9152
3151 9152 3139 9175 3156 9183
TIME...MOT...LOC 0051Z 238DEG 42KT 3158 9169
HAIL...1.00IN
WIND...60MPH
$$
TW448
WWUS54 KJAN 240058
SVSJAN
Severe Weather Statement
National Weather Service Jackson MS
758 PM CDT Fri Apr 23 2021
LAC025-029-240115-
/O.CON.KJAN.SV.W.0110.000000T0000Z-210424T0115Z/
Concordia LA-Catahoula LA-
758 PM CDT Fri Apr 23 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR NORTHWESTERN CONCORDIA AND CENTRAL CATAHOULA PARISHES...
At 758 PM CDT, a severe thunderstorm was located near West Ferriday,
or near Ferriday, moving northeast at 45 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
This severe thunderstorm will remain over mainly rural areas of
northwestern Concordia and central Catahoula Parishes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3174 9179 3179 9167 3153 9151 3152 9152
3151 9152 3141 9172 3160 9180
TIME...MOT...LOC 0058Z 241DEG 40KT 3160 9160
HAIL...1.00IN
WIND...60MPH
$$
TW819
WWUS54 KJAN 240113
SVSJAN
Severe Weather Statement
National Weather Service Jackson MS
813 PM CDT Fri Apr 23 2021
LAC025-029-240123-
/O.EXP.KJAN.SV.W.0110.000000T0000Z-210424T0115Z/
Concordia LA-Catahoula LA-
813 PM CDT Fri Apr 23 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CONCORDIA AND
CENTRAL CATAHOULA PARISHES WILL EXPIRE AT 815 PM CDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
LAT...LON 3174 9179 3179 9167 3153 9151 3152 9152
3151 9152 3141 9172 3160 9180
TIME...MOT...LOC 0113Z 238DEG 42KT 3168 9146
$$
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, 7:55 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, 9:35 PM CDT | Severe Thunderstorm Warning | JAN | Catahoula, Concordia | 36 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.