Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 133, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at May 4, 2021, 1:15 PM CDT for 4 parishes in Louisiana. It was in force for 75 min. 4 reports 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
- May 4, 2021, 1:15 PM CDT (18:15 UTC)
- Expired
- May 4, 2021, 2:30 PM CDT
- In force
- 75 min
- Issued by
- NWS Jackson, MS
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 70.0 mph
Counties Catahoula Parish, LA, Concordia Parish, LA, Franklin Parish, LA, Tensas Parish, LA
The radar
The Ft Polk radar (KPOE), 130 km from the middle of the area, began a volume at 18:15 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 |
|---|---|---|---|
| May 4, 1:38 PM CDT | TSTM WND DMG | 2 Sse Winnsboro, LA | SCATTERED TREES DOWN AROUND WINNSBORO. ONE TREE ON A HOME ALONG HWY 425 JUST S OF TOWN. |
| May 4, 1:40 PM CDT | TSTM WND DMG | 2 Wsw Wisner, LA | SCATTERED TREES DOWN SW AND NEAR WISNER. |
| May 4, 1:47 PM CDT | TSTM WND DMG | 3 Wnw Wallace Ridge, LA | TREE ACROSS HWY 126. |
| May 4, 2:07 PM CDT | TSTM WND DMG | 1 Se Ferriday, LA | COUPLE TREES DOWN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 4, 10:52 AM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 6.3 hours before the alert went out and 176 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
- 2428 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 646 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 170 m²/s²
- 0-3 km storm-relative helicity
- 235 m²/s²
- Significant tornado parameter
- 2.8
- Supercell composite
- 13.2
The text
As transmitted.
342
WUUS54 KJAN 041815
SVRJAN
LAC025-029-041-107-041930-
/O.NEW.KJAN.SV.W.0133.210504T1815Z-210504T1930Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jackson MS
115 PM CDT Tue May 4 2021
The National Weather Service in Jackson has issued a
* Severe Thunderstorm Warning for...
Western Tensas Parish in northeastern Louisiana...
Concordia Parish in northeastern Louisiana...
Catahoula Parish in northeastern Louisiana...
Franklin Parish in northeastern Louisiana...
* Until 230 PM CDT.
* At 115 PM CDT, severe thunderstorms were located along a line
extending from near Buckner to near Aimwell to near Effie, moving
east at 40 mph.
HAZARD...70 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Severe thunderstorms will be near...
Aimwell and Manifest around 120 PM CDT.
Sherwood and Rosefield around 125 PM CDT.
Enterprise around 130 PM CDT.
Larto around 135 PM CDT.
Acme and Mayna around 140 PM CDT.
New Era around 145 PM CDT.
Monterey, Wisner and Slocum around 155 PM CDT.
Cooter Point and Deer Park around 205 PM CDT.
Other locations impacted by these severe thunderstorms include
Harrisonburg, Gilbert, Sicily Island and Ridgecrest.
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 600 PM CDT for northeastern
Louisiana...and southwestern Mississippi.
LAT...LON 3120 9168 3130 9191 3122 9198 3128 9202
3193 9201 3193 9190 3217 9188 3220 9133
3163 9140 3162 9152 3160 9142 3152 9152
3139 9146 3143 9154 3143 9155 3140 9158
3128 9151 3125 9166 3104 9156 3097 9166
TIME...MOT...LOC 1815Z 255DEG 36KT 3224 9199 3178 9205 3125 9213
HAIL...0.88IN
WIND...70MPH
$$
TW2 follow-up statements
878
WWUS54 KJAN 041854
SVSJAN
Severe Weather Statement
National Weather Service Jackson MS
154 PM CDT Tue May 4 2021
LAC025-029-041-107-041930-
/O.CON.KJAN.SV.W.0133.000000T0000Z-210504T1930Z/
Tensas LA-Concordia LA-Catahoula LA-Franklin LA-
154 PM CDT Tue May 4 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM CDT
FOR WESTERN TENSAS...CONCORDIA...CENTRAL CATAHOULA AND SOUTHEASTERN
FRANKLIN PARISHES...
At 154 PM CDT, severe thunderstorms were located along a line
extending from near Newlight to Clayton to near Acme, moving east at
45 mph.
HAZARD...70 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
These severe storms will be near...
Spokane around 205 PM CDT.
Other locations impacted by these severe thunderstorms include Sicily
Island and Ridgecrest.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
A Tornado Watch remains in effect until 600 PM CDT for northeastern
Louisiana...and southwestern Mississippi.
LAT...LON 3130 9192 3171 9185 3219 9157 3220 9134
3163 9141 3162 9153 3160 9143 3152 9153
3140 9147 3143 9154 3143 9156 3140 9159
3128 9152 3125 9167 3104 9157 3098 9166
3120 9168 3130 9190
TIME...MOT...LOC 1854Z 262DEG 39KT 3217 9138 3172 9157 3124 9174
HAIL...0.88IN
WIND...70MPH
$$
TW552
WWUS54 KJAN 041914
SVSJAN
Severe Weather Statement
National Weather Service Jackson MS
214 PM CDT Tue May 4 2021
LAC025-041-107-041924-
/O.CAN.KJAN.SV.W.0133.000000T0000Z-210504T1930Z/
Tensas LA-Catahoula LA-Franklin LA-
214 PM CDT Tue May 4 2021
...THE SEVERE THUNDERSTORM WARNING FOR WESTERN TENSAS...CENTRAL
CATAHOULA AND SOUTHEASTERN FRANKLIN PARISHES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 600 PM CDT for northeastern
Louisiana...and southwestern Mississippi.
LAT...LON 3120 9168 3126 9181 3145 9172 3173 9165
3176 9160 3172 9155 3175 9154 3175 9140
3163 9141 3165 9150 3162 9153 3159 9144
3152 9153 3140 9147 3143 9155 3140 9159
3128 9152 3125 9167 3104 9157 3098 9166
TIME...MOT...LOC 1914Z 255DEG 36KT 3222 9117 3177 9136 3129 9153
$$
LAC029-041930-
/O.CON.KJAN.SV.W.0133.000000T0000Z-210504T1930Z/
Concordia LA-
214 PM CDT Tue May 4 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM CDT
FOR CONCORDIA PARISH...
At 214 PM CDT, severe thunderstorms were located along a line
extending from near Afton to near Waterproof to 6 miles east of
Slocum, moving east at 40 mph.
HAZARD...70 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
These severe thunderstorms will remain over mainly rural areas of
Concordia Parish, including the following locations... Ridgecrest.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
A Tornado Watch remains in effect until 600 PM CDT for northeastern
Louisiana...and southwestern Mississippi.
LAT...LON 3120 9168 3126 9181 3145 9172 3173 9165
3176 9160 3172 9155 3175 9154 3175 9140
3163 9141 3165 9150 3162 9153 3159 9144
3152 9153 3140 9147 3143 9155 3140 9159
3128 9152 3125 9167 3104 9157 3098 9166
TIME...MOT...LOC 1914Z 255DEG 36KT 3222 9117 3177 9136 3129 9153
HAIL...0.88IN
WIND...70MPH
$$
TWThe office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 11:57 AM CDT | Severe Thunderstorm Warning | JAN | Morehouse | 78 min |
| May 4, 12:30 PM CDT | Severe Thunderstorm Warning | JAN | East Carroll, West Carroll | 75 min |
| May 4, 12:37 PM CDT | Flash Flood Warning | JAN | Morehouse, West Carroll | 3 hr |
| May 4, 12:57 PM CDT | Severe Thunderstorm Warning | JAN | East Carroll, Franklin, Madison, Richland, West Carroll | 76 min |
| May 4, 1:37 PM CDT | Severe Thunderstorm Warning | JAN | East Carroll, Madison | 53 min |
| May 4, 1:57 PM CDT | Severe Thunderstorm Warning | JAN | Tensas | 78 min |
| May 4, 3:51 PM CDT | Areal Flood Warning | JAN | Morehouse, West Carroll | 6 hr |
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.