Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 101, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Apr 9, 2021, 10:11 PM CDT for Catahoula Parish, Concordia Parish, Franklin Parish, Louisiana. It was in force for 49 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 9, 2021, 10:11 PM CDT (03:11 UTC)
- Expired
- Apr 9, 2021, 11:00 PM CDT
- In force
- 49 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, Franklin Parish, LA
The radar
The Ft Polk radar (KPOE), 138 km from the middle of the area, began a volume at 03:09 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 9, 3:42 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Jackson, MS (KJAN), launched 00:00Z, 3.2 hours before the alert went out and 166 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
- 2299 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 1555 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.9
The text
As transmitted.
814
WUUS54 KJAN 100311
SVRJAN
LAC025-029-041-100400-
/O.NEW.KJAN.SV.W.0101.210410T0311Z-210410T0400Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jackson MS
1011 PM CDT Fri Apr 9 2021
The National Weather Service in Jackson has issued a
* Severe Thunderstorm Warning for...
North central Concordia Parish in northeastern Louisiana...
Northern Catahoula Parish in northeastern Louisiana...
South central Franklin Parish in northeastern Louisiana...
* Until 1100 PM CDT.
* At 1011 PM CDT, a severe thunderstorm was located over Aimwell, or
24 miles south of Columbia, 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...
Wallace Ridge around 1020 PM CDT.
Lee Bayou around 1045 PM CDT.
Other locations impacted by this severe thunderstorm include
Harrisonburg and Sicily Island.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3184 9201 3201 9160 3182 9157 3180 9158
3175 9154 3164 9152 3164 9201
TIME...MOT...LOC 0311Z 251DEG 35KT 3176 9195
HAIL...1.00IN
WIND...60MPH
$$
NF2 follow-up statements
013
WWUS54 KJAN 100325
SVSJAN
Severe Weather Statement
National Weather Service Jackson MS
1025 PM CDT Fri Apr 9 2021
LAC025-029-041-100400-
/O.CON.KJAN.SV.W.0101.000000T0000Z-210410T0400Z/
Concordia LA-Catahoula LA-Franklin LA-
1025 PM CDT Fri Apr 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT
FOR NORTH CENTRAL CONCORDIA...NORTHERN CATAHOULA AND SOUTH CENTRAL
FRANKLIN PARISHES...
At 1025 PM CDT, a severe thunderstorm was located near Wallace Ridge,
or 14 miles northwest of Ferriday, moving east at 45 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
This severe storm will be near...
Clayton and Lee Bayou around 1040 PM CDT.
Other locations impacted by this severe thunderstorm include
Harrisonburg and Sicily Island.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3201 9160 3182 9157 3180 9158 3175 9154
3164 9152 3164 9193 3188 9190
TIME...MOT...LOC 0325Z 260DEG 37KT 3176 9176
HAIL...0.75IN
WIND...60MPH
$$
NF265
WWUS54 KJAN 100351
SVSJAN
Severe Weather Statement
National Weather Service Jackson MS
1051 PM CDT Fri Apr 9 2021
LAC025-029-041-100401-
/O.EXP.KJAN.SV.W.0101.000000T0000Z-210410T0400Z/
Concordia LA-Catahoula LA-Franklin LA-
1051 PM CDT Fri Apr 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL CONCORDIA...
NORTHERN CATAHOULA AND SOUTH CENTRAL FRANKLIN PARISHES WILL EXPIRE AT
1100 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire. However heavy rain is still possible with this
thunderstorm.
A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
northeastern Louisiana.
LAT...LON 3201 9160 3182 9157 3180 9158 3175 9154
3164 9152 3164 9193 3188 9190
TIME...MOT...LOC 0351Z 251DEG 35KT 3184 9149
$$
NFThe office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 7:49 PM CDT | Severe Thunderstorm Warning | JAN | Morehouse, Richland | 39 min |
| Apr 9, 8:10 PM CDT | Severe Thunderstorm Warning | JAN | Franklin, Richland | 50 min |
| Apr 9, 8:49 PM CDT | Severe Thunderstorm Warning | JAN | East Carroll, Madison | 41 min |
| Apr 9, 10:03 PM CDT | Special Weather Statement | JAN | Madison, Tensas | 27 min |
| Apr 10, 12:01 AM CDT | Flash Flood Warning | JAN | Concordia | 3 hr |
| Apr 10, 12:59 AM CDT | Special Weather Statement | JAN | Catahoula | 46 min |
| Apr 10, 1:24 AM CDT | Severe Thunderstorm Warning | JAN | Catahoula, Concordia | 51 min |
| Apr 10, 2:14 AM CDT | Flash Flood Warning | JAN | Catahoula | 3 hr |
| Apr 10, 2:53 AM CDT | Flash Flood Warning | JAN | Concordia | 118 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.