Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 183, NWS Shreveport, LA

July 27, 2021Bienville Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Jul 27, 2021, 3:38 PM CDT for Bienville Parish, Louisiana. It was in force for 52 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: Jul 27, 2021, 3:38 PM CDT (20:38 UTC)
Expired: Jul 27, 2021, 4:30 PM CDT
In force: 52 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Bienville Parish, LA

The radar

The Shreveport radar (KSHV), 75 km from the middle of the area, began a volume at 20:40 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

Shreveport, LA (KSHV), launched 12:00Z, 8.6 hours before the alert went out and 67 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: 1955 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 1196 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 8 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.4

Open this sounding in Storm Lab

The text

As transmitted.

212 
WUUS54 KSHV 272038
SVRSHV
LAC013-272130-
/O.NEW.KSHV.SV.W.0183.210727T2038Z-210727T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
338 PM CDT Tue Jul 27 2021

The National Weather Service in Shreveport has issued a

* Severe Thunderstorm Warning for...
  Central Bienville Parish in northwestern Louisiana...

* Until 430 PM CDT.

* At 338 PM CDT, a severe thunderstorm was located 12 miles east of
  Ringgold, or 22 miles west of Jonesboro, moving southwest at 5 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Lucky, Castor, Bienville, Jamestown, Bryceland, Sailes and Brice. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3246 9300 3233 9289 3216 9309 3238 9328
TIME...MOT...LOC 2038Z 057DEG 6KT 3234 9307 

HAIL...<.75IN
WIND...60MPH
 
$$

04

1 follow-up statement

937 
WWUS54 KSHV 272104
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
404 PM CDT Tue Jul 27 2021

LAC013-272130-
/O.CON.KSHV.SV.W.0183.000000T0000Z-210727T2130Z/
Bienville LA-
404 PM CDT Tue Jul 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CDT
FOR CENTRAL BIENVILLE PARISH...

At 404 PM CDT, a severe thunderstorm was located 13 miles south of
Gibsland, or 19 miles northwest of Jonesboro, and is nearly
stationary.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Lucky, Bienville, Bryceland and Brice. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3246 9300 3233 9289 3222 9302 3238 9314
TIME...MOT...LOC 2104Z 051DEG 1KT 3235 9302 

HAIL...<.75IN
WIND...60MPH
 
$$

04

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 2:13 PM CDT	Special Weather Statement	SHV	LaSalle	47 min
Jul 27, 2:18 PM CDT	Heat Advisory	SHV	Bienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 11 more	29 hr
Jul 27, 4:01 PM CDT	Special Weather Statement	SHV	Bienville	44 min
Jul 27, 4:29 PM CDT	Special Weather Statement	SHV	Red River	31 min
Jul 27, 4:38 PM CDT	Special Weather Statement	SHV	Bienville	37 min
Jul 27, 4:57 PM CDT	Special Weather Statement	SHV	Red River	33 min
Jul 27, 5:04 PM CDT	Special Weather Statement	SHV	Red River	26 min
Jul 27, 5:53 PM CDT	Special Weather Statement	SHV	Claiborne	37 min
Jul 27, 6:01 PM CDT	Special Weather Statement	SHV	Sabine	44 min
Jul 27, 6:19 PM CDT	Severe Thunderstorm Warning	SHV	Sabine	41 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.