Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 107, NWS Jackson, MS

April 14, 2021Catahoula Parish, Concordia Parish, Louisiana

NWS Jackson, MS issued this severe thunderstorm warning at Apr 14, 2021, 5:54 AM CDT for Catahoula Parish, Concordia Parish, Louisiana. It was in force for 18 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 14, 2021, 5:54 AM CDT (10:54 UTC)
Expired: Apr 14, 2021, 6:12 AM CDT
In force: 18 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

Counties Catahoula Parish, LA, Concordia Parish, LA

The radar

The Ft Polk radar (KPOE), 117 km from the middle of the area, began a volume at 10:57 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

Jackson, MS (KJAN), launched 00:00Z, 10.9 hours before the alert went out and 186 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1440 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: -36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

781 
WUUS54 KJAN 141054
SVRJAN
LAC025-029-141145-
/O.NEW.KJAN.SV.W.0107.210414T1054Z-210414T1145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jackson MS
554 AM CDT Wed Apr 14 2021

The National Weather Service in Jackson has issued a

* Severe Thunderstorm Warning for...
  Northwestern Concordia Parish in northeastern Louisiana...
  West central Catahoula Parish in northeastern Louisiana...

* Until 645 AM CDT.

* At 554 AM CDT, a severe thunderstorm was located over Walters, or
  14 miles northwest of Larto, moving northeast at 25 mph.

  HAZARD...Half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will be near...
  Jonesville around 620 AM CDT.
  Wildsville around 625 AM CDT.
  Wallace Ridge around 630 AM CDT.
  Frogmore around 640 AM 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 3167 9201 3180 9178 3160 9162 3146 9201
TIME...MOT...LOC 1054Z 241DEG 21KT 3157 9200 

HAIL...1.25IN
WIND...<50MPH
 
$$

GRG

1 follow-up statement

596 
WWUS54 KJAN 141112
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
612 AM CDT Wed Apr 14 2021

LAC025-029-141122-
/O.CAN.KJAN.SV.W.0107.000000T0000Z-210414T1145Z/
Concordia LA-Catahoula LA-
612 AM CDT Wed Apr 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CONCORDIA AND
WEST CENTRAL CATAHOULA PARISHES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe 
limits. Therefore, the warning has been cancelled. However, small 
hail is still possible with this thunderstorm.

LAT...LON 3167 9201 3180 9178 3160 9162 3146 9201
TIME...MOT...LOC 1110Z 241DEG 21KT 3162 9189 

$$

GRG

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 14, 5:40 AM CDT	Special Weather Statement	JAN	Catahoula	35 min
Apr 14, 6:06 AM CDT	Special Weather Statement	JAN	Concordia	24 min
Apr 14, 6:20 AM CDT	Severe Thunderstorm Warning	JAN	Concordia	26 min
Apr 14, 7:11 AM CDT	Special Weather Statement	JAN	Concordia	49 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 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.