Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 102, NWS Shreveport, LA

April 16, 2021De Soto Parish, Natchitoches Parish, Sabine Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 16, 2021, 2:03 PM CDT for De Soto Parish, Natchitoches Parish, Sabine Parish, Louisiana. It was in force for 42 min. 1 report 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: Apr 16, 2021, 2:03 PM CDT (19:03 UTC)
Expired: Apr 16, 2021, 2:45 PM CDT
In force: 42 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties De Soto Parish, LA, Natchitoches Parish, LA, Sabine Parish, LA

The radar

The Ft Polk radar (KPOE), 58 km from the middle of the area, began a volume at 19:04 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
Apr 16, 2:18 PM CDT	HAIL 1	Robeline, LA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 7.1 hours before the alert went out and 110 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: 666 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 217 m²/s²
0-3 km storm-relative helicity: 203 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

882 
WUUS54 KSHV 161903
SVRSHV
LAC031-069-085-161945-
/O.NEW.KSHV.SV.W.0102.210416T1903Z-210416T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
203 PM CDT Fri Apr 16 2021

The National Weather Service in Shreveport has issued a

* Severe Thunderstorm Warning for...
  Southern De Soto Parish in northwestern Louisiana...
  Central Natchitoches Parish in northwestern Louisiana...
  Northeastern Sabine Parish in northwestern Louisiana...

* Until 245 PM CDT.

* At 203 PM CDT, a severe thunderstorm was located 10 miles north of 
  Many, or 19 miles west of Natchitoches, moving east southeast at 
  50 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.

* Locations impacted include...
  Natchitoches, Many, Allen, Pleasant Hill, Provencal, Natchez,
  Robeline, Cloutierville, Melrose, Belmont, Bellwood, Flora,
  Bermuda, Marthaville and Hagewood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3159 9363 3189 9353 3178 9296 3177 9297
      3171 9298 3170 9296 3168 9297 3168 9293
      3166 9292 3166 9290 3163 9291 3160 9285
      3144 9290
TIME...MOT...LOC 1903Z 281DEG 44KT 3172 9343 

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

13

2 follow-up statements

060 
WWUS54 KSHV 161922
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
222 PM CDT Fri Apr 16 2021

LAC031-161930-
/O.CAN.KSHV.SV.W.0102.000000T0000Z-210416T1945Z/
De Soto LA-
222 PM CDT Fri Apr 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN DE SOTO 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 3154 9340 3186 9336 3178 9296 3177 9297
      3171 9298 3170 9296 3168 9297 3168 9293
      3166 9292 3166 9290 3163 9291 3160 9285
      3144 9290
TIME...MOT...LOC 1920Z 281DEG 44KT 3168 9319 

$$

LAC069-085-161945-
/O.CON.KSHV.SV.W.0102.000000T0000Z-210416T1945Z/
Natchitoches LA-Sabine LA-
222 PM CDT Fri Apr 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM CDT
FOR SOUTHERN NATCHITOCHES AND NORTHEASTERN SABINE PARISHES...

At 220 PM CDT, a severe thunderstorm was located 7 miles southwest of
Natchitoches, moving east at 50 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.

Locations impacted include...
Natchitoches, Allen, Provencal, Natchez, Robeline, Cloutierville,
Melrose, Flora, Bellwood, Bermuda and Hagewood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3154 9340 3186 9336 3178 9296 3177 9297
      3171 9298 3170 9296 3168 9297 3168 9293
      3166 9292 3166 9290 3163 9291 3160 9285
      3144 9290
TIME...MOT...LOC 1920Z 281DEG 44KT 3168 9319 

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

13

459 
WWUS54 KSHV 161934
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
234 PM CDT Fri Apr 16 2021

LAC085-161944-
/O.CAN.KSHV.SV.W.0102.000000T0000Z-210416T1945Z/
Sabine LA-
234 PM CDT Fri Apr 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SABINE 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 3150 9318 3165 9315 3181 9313 3178 9296
      3177 9297 3171 9298 3170 9296 3168 9297
      3168 9293 3166 9292 3166 9290 3163 9291
      3160 9285 3144 9290
TIME...MOT...LOC 1934Z 281DEG 44KT 3165 9299 

$$

LAC069-161945-
/O.CON.KSHV.SV.W.0102.000000T0000Z-210416T1945Z/
Natchitoches LA-
234 PM CDT Fri Apr 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM CDT
FOR SOUTHEASTERN NATCHITOCHES PARISH...

At 234 PM CDT, a severe thunderstorm was located near Montgomery, or
9 miles southeast of Natchitoches, moving east at 50 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.

Locations impacted include...
Natchitoches, Natchez, Cloutierville, Melrose, Flora, Bellwood and
Bermuda.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3150 9318 3165 9315 3181 9313 3178 9296
      3177 9297 3171 9298 3170 9296 3168 9297
      3168 9293 3166 9292 3166 9290 3163 9291
      3160 9285 3144 9290
TIME...MOT...LOC 1934Z 281DEG 44KT 3165 9299 

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

13

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 16, 12:51 PM CDT	Special Weather Statement	SHV	De Soto, Red River	54 min
Apr 16, 1:46 PM CDT	Special Weather Statement	SHV	Sabine	44 min
Apr 16, 2:46 PM CDT	Special Weather Statement	SHV	Grant	44 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.