Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 89, NWS Jackson, MS

April 9, 2021Morehouse Parish, Richland Parish, Louisiana

NWS Jackson, MS issued this severe thunderstorm warning at Apr 9, 2021, 7:49 PM CDT for Morehouse Parish, Richland Parish, Louisiana. It was in force for 39 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, 7:49 PM CDT (00:49 UTC)
Expired
Apr 9, 2021, 8:28 PM CDT
In force
39 min
Issued by
NWS Jackson, MS
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

Counties Morehouse Parish, LA, Richland Parish, LA

The radar

The Jackson/Brandon,MS radar (KDGX), 174 km from the middle of the area, began a volume at 00:52 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.

IssuedProductOfficeLasted
Apr 9, 3:42 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 0.8 hours before the alert went out and 164 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-pSkew-T log-p diagram, Jackson, MS at 00:00Z on 2021-04-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2299 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 00:00Z on 2021-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
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

Open this sounding in Storm Lab

The text

As transmitted.

257 
WUUS54 KJAN 100049
SVRJAN
LAC067-083-100200-
/O.NEW.KJAN.SV.W.0089.210410T0049Z-210410T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jackson MS
749 PM CDT Fri Apr 9 2021

The National Weather Service in Jackson has issued a

* Severe Thunderstorm Warning for...
  Central Morehouse Parish in northeastern Louisiana...
  Northwestern Richland Parish in northeastern Louisiana...

* Until 900 PM CDT.

* At 749 PM CDT, a severe thunderstorm was located near Swartz,
  moving northeast at 25 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Public.

  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
  central Morehouse and northwestern Richland Parishes, including the
  following locations... Collinston, Mer Rouge and Oak Ridge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3298 9177 3281 9159 3279 9160 3275 9160
      3270 9164 3269 9162 3267 9163 3267 9160
      3260 9160 3242 9190 3246 9195 3249 9193
      3252 9190 3260 9193 3266 9191 3267 9193
      3266 9194 3268 9197
TIME...MOT...LOC 0049Z 226DEG 21KT 3255 9191 

HAIL...1.25IN
WIND...60MPH
 
$$

DB
2 follow-up statements
227 
WWUS54 KJAN 100112
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
812 PM CDT Fri Apr 9 2021

LAC067-083-100200-
/O.CON.KJAN.SV.W.0089.000000T0000Z-210410T0200Z/
Morehouse LA-Richland LA-
812 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR CENTRAL MOREHOUSE AND NORTHEASTERN RICHLAND PARISHES...

At 812 PM CDT, a severe thunderstorm was located 10 miles southwest
of Goodwill, or 14 miles southeast of Bastrop, moving northeast at 30
mph.

HAZARD...60 mph wind gusts and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Bastrop, Galion and Mer Rouge. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3298 9177 3281 9159 3279 9160 3275 9160
      3270 9164 3269 9162 3267 9163 3267 9160
      3260 9160 3255 9168 3276 9191
TIME...MOT...LOC 0112Z 234DEG 26KT 3268 9169 

HAIL...0.88IN
WIND...60MPH
 
$$

NF
528 
WWUS54 KJAN 100128
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
828 PM CDT Fri Apr 9 2021

LAC067-083-100137-
/O.CAN.KJAN.SV.W.0089.000000T0000Z-210410T0200Z/
Morehouse LA-Richland LA-
828 PM CDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MOREHOUSE AND
NORTHEASTERN RICHLAND PARISHES IS CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.  However gusty winds and heavy rain are still
possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
northeastern Louisiana.

Remember, a Severe Thunderstorm Warning still remains in effect for 
southern and central Richland Parish.

LAT...LON 3298 9177 3281 9159 3279 9160 3275 9160
      3270 9164 3269 9162 3267 9163 3267 9160
      3260 9160 3255 9168 3276 9191
TIME...MOT...LOC 0121Z 226DEG 21KT 3274 9161 

$$

NF

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 9, 8:10 PM CDTSevere Thunderstorm WarningJANFranklin, Richland50 min
Apr 9, 8:49 PM CDTSevere Thunderstorm WarningJANEast Carroll, Madison41 min
Apr 9, 10:03 PM CDTSpecial Weather StatementJANMadison, Tensas27 min
Apr 9, 10:11 PM CDTSevere Thunderstorm WarningJANCatahoula, Concordia, Franklin49 min
Apr 10, 12:01 AM CDTFlash Flood WarningJANConcordia3 hr
Apr 10, 12:59 AM CDTSpecial Weather StatementJANCatahoula46 min
Apr 10, 1:24 AM CDTSevere Thunderstorm WarningJANCatahoula, Concordia51 min
Apr 10, 2:14 AM CDTFlash Flood WarningJANCatahoula3 hr
Apr 10, 2:53 AM CDTFlash Flood WarningJANConcordia118 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.