Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 176, NWS Jackson, MS

May 10, 2021Catahoula Parish, Concordia Parish, Louisiana; Adams County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at May 10, 2021, 10:37 PM CDT for Catahoula Parish, Concordia Parish, Louisiana; Adams County, Mississippi. It was in force for 32 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: May 10, 2021, 10:37 PM CDT (03:37 UTC)
Expired: May 10, 2021, 11:09 PM CDT
In force: 32 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Catahoula Parish, LA, Concordia Parish, LA, Adams County, MS

The radar

The Ft Polk radar (KPOE), 117 km from the middle of the area, began a volume at 03:39 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 nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 3.6 hours before the alert went out and 190 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 213 J/kg
Mixed-layer CIN: -152 J/kg
Mixed-layer LCL: 1481 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

585 
WUUS54 KJAN 110337
SVRJAN
LAC025-029-MSC001-110430-
/O.NEW.KJAN.SV.W.0176.210511T0337Z-210511T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jackson MS
1037 PM CDT Mon May 10 2021

The National Weather Service in Jackson has issued a

* Severe Thunderstorm Warning for...
  West central Concordia Parish in northeastern Louisiana...
  Southwestern Catahoula Parish in northeastern Louisiana...
  Southwestern Adams County in southwestern Mississippi...

* Until 1130 PM CDT.

* At 1037 PM CDT, a severe thunderstorm was located near Acme, or
  near Larto, moving east at 20 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Acme around 1045 PM CDT.
  New Era around 1050 PM CDT.
  Monterey around 1110 PM CDT.
  Slocum around 1115 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3150 9160 3124 9155 3123 9157 3121 9158
      3122 9175 3122 9178 3124 9181 3125 9181
      3127 9184 3126 9185 3129 9189 3129 9193
      3135 9195
TIME...MOT...LOC 0337Z 255DEG 19KT 3130 9189 

HAIL...1.50IN
WIND...60MPH
 
$$

22

3 follow-up statements

381 
WWUS54 KJAN 110346
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
1046 PM CDT Mon May 10 2021

LAC025-110355-
/O.CAN.KJAN.SV.W.0176.000000T0000Z-210511T0430Z/
Catahoula LA-
1046 PM CDT Mon May 10 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.

LAT...LON 3137 9186 3138 9184 3137 9181 3138 9178
      3139 9178 3140 9179 3140 9182 3150 9160
      3124 9155 3121 9158 3122 9178 3127 9183
      3129 9182 3129 9185 3131 9187
TIME...MOT...LOC 0345Z 255DEG 19KT 3131 9184 

$$

LAC029-MSC001-110430-
/O.CON.KJAN.SV.W.0176.000000T0000Z-210511T0430Z/
Concordia LA-Adams MS-
1046 PM CDT Mon May 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR WEST CENTRAL CONCORDIA PARISH IN NORTHEASTERN LOUISIANA AND
SOUTHWESTERN ADAMS COUNTIES...

At 1045 PM CDT, a severe thunderstorm was located over Acme, or near
Larto, moving east at 20 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

This severe storm will be near...
  Slocum around 1115 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3137 9186 3138 9184 3137 9181 3138 9178
      3139 9178 3140 9179 3140 9182 3150 9160
      3124 9155 3121 9158 3122 9178 3127 9183
      3129 9182 3129 9185 3131 9187
TIME...MOT...LOC 0345Z 255DEG 19KT 3131 9184 

HAIL...1.75IN
WIND...60MPH
 
$$

22

657 
WWUS54 KJAN 110401
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
1101 PM CDT Mon May 10 2021

LAC029-MSC001-110430-
/O.CON.KJAN.SV.W.0176.000000T0000Z-210511T0430Z/
Concordia LA-Adams MS-
1101 PM CDT Mon May 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR WEST CENTRAL CONCORDIA PARISH IN NORTHEASTERN LOUISIANA AND
SOUTHWESTERN ADAMS COUNTIES...

At 1101 PM CDT, a severe thunderstorm was located near Acme, or 11
miles southeast of Larto, moving east at 15 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...
  Slocum around 1125 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3132 9180 3134 9177 3137 9157 3124 9155
      3121 9158 3122 9178 3127 9183 3129 9182
      3130 9182
TIME...MOT...LOC 0401Z 276DEG 15KT 3126 9176 

HAIL...1.00IN
WIND...60MPH
 
$$

22

255 
WWUS54 KJAN 110409
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
1109 PM CDT Mon May 10 2021

LAC029-MSC001-110418-
/O.CAN.KJAN.SV.W.0176.000000T0000Z-210511T0430Z/
Concordia LA-Adams MS-
1109 PM CDT Mon May 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL CONCORDIA PARISH
IN NORTHEASTERN LOUISIANA AND SOUTHWESTERN ADAMS COUNTIES IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has weakened. 
Therefore, the warning has been cancelled.

LAT...LON 3132 9180 3134 9177 3137 9157 3124 9155
      3121 9158 3122 9178 3127 9183 3129 9182
      3130 9182
TIME...MOT...LOC 0405Z 255DEG 19KT 3127 9171 

$$

22

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 10, 7:16 PM CDT	Special Weather Statement	JAN	Avoyelles	44 min
May 10, 10:03 PM CDT	Special Weather Statement	JAN	Concordia	57 min
May 11, 2:26 AM CDT	Special Weather Statement	JAN	Catahoula	49 min
May 11, 3:25 AM CDT	Flash Flood Watch	JAN	Catahoula, Concordia, Franklin, Richland, Tensas	25 hr
May 11, 9:20 AM CDT	River Flood Warning	JAN	Neshoba	24 hr
May 11, 9:25 AM CDT	River Flood Warning	JAN	Attala, Holmes	21 days
May 11, 9:25 AM CDT	River Flood Warning	JAN	Madison, Yazoo	21 days
May 11, 10:30 AM CDT	Special Weather Statement	JAN	Forrest, Lamar	45 min
May 11, 10:40 AM CDT	Special Weather Statement	JAN	Marion	50 min
May 11, 11:05 AM CDT	Special Weather Statement	JAN	Lamar	40 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2021 Severe Thunderstorm Warnings in Mississippi, 2021 Every 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.