Alert archive / Arkansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 133, NWS Shreveport, LA

May 9, 2021Columbia County, Lafayette County, Union County, Arkansas; Claiborne Parish, Webster Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at May 9, 2021, 7:17 PM CDT for Columbia County, Lafayette County, Union County, Arkansas; Claiborne Parish, Webster Parish, Louisiana. It was in force for 58 min. 2 reports 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: May 9, 2021, 7:17 PM CDT (00:17 UTC)
Expired: May 9, 2021, 8:15 PM CDT
In force: 58 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Columbia County, AR, Lafayette County, AR, Union County, AR, Claiborne Parish, LA, Webster Parish, LA

The radar

The Shreveport radar (KSHV), 154 km from the middle of the area, began a volume at 00:19 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
May 9, 7:35 PM CDT	TSTM WND DMG	Magnolia, AR	TREES REPORTED DOWN ALL OVER THE COUNTY.
May 9, 7:44 PM CDT	TSTM WND DMG	El Dorado, AR	TREES REPORTED DOWN COUNTY WIDE AND ON HWY 15, 167, CHAMPAREL ROAD, SEVERAL TREES DOWN, WESSON ROAD.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 9, 1:14 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 0.3 hours before the alert went out and 145 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: 1784 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 975 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 203 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 8.5

Open this sounding in Storm Lab

The text

As transmitted.

468 
WUUS54 KSHV 100017
SVRSHV
ARC027-073-139-LAC027-119-100115-
/O.NEW.KSHV.SV.W.0133.210510T0017Z-210510T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
717 PM CDT Sun May 9 2021

The National Weather Service in Shreveport has issued a

* Severe Thunderstorm Warning for...
  South central Lafayette County in southwestern Arkansas...
  Union County in south central Arkansas...
  Columbia County in southwestern Arkansas...
  North central Webster Parish in northwestern Louisiana...
  Northwestern Claiborne Parish in northwestern Louisiana...

* Until 815 PM CDT.

* At 717 PM CDT, severe thunderstorms were located along a line
  extending from near Lisbon to near Canfield, moving east at 30 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...
  El Dorado, Magnolia, Smackover, Norphlet, Junction City,
  Haynesville, Taylor, Strong, Calion, Emerson, Shongaloo, Bussey,
  Mount Holly, Smithland, Atlanta, Wesson, Village, Lisbon, Urbana
  and Lawson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3291 9325 3321 9365 3338 9276 3332 9252
      3331 9246 3329 9247 3327 9244 3329 9237
      3328 9233 3326 9232 3327 9230 3325 9227
      3326 9223 3323 9223 3323 9222 3321 9223
      3320 9221 3321 9218 3316 9217 3316 9211
TIME...MOT...LOC 0017Z 282DEG 25KT 3329 9276 3317 9356 

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

33

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 7:02 PM CDT	Special Weather Statement	SHV	Grant, Natchitoches	58 min
May 9, 7:22 PM CDT	Severe Thunderstorm Warning	SHV	Grant, Natchitoches, Sabine	53 min
May 9, 8:05 PM CDT	Special Weather Statement	SHV	Grant	55 min
May 9, 8:14 PM CDT	Special Weather Statement	SHV	Claiborne, Union	61 min
May 9, 8:15 PM CDT	Special Weather Statement	SHV	Webster	60 min
May 10, 2:25 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo	65 min
May 10, 2:53 PM CDT	Special Weather Statement	SHV	Caddo	52 min
May 10, 3:30 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo	45 min
May 10, 3:45 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Bossier, Caddo, De Soto, Webster	45 min
May 10, 3:54 PM CDT	Special Weather Statement	SHV	Webster	66 min
May 10, 3:58 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Bossier, Claiborne, Webster	25 min
May 10, 4:16 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Bossier, Caddo, Natchitoches, Red River, Webster and 1 more	44 min
May 10, 4:56 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Jackson, Natchitoches, Winn	53 min
May 10, 5:30 PM CDT	Special Weather Statement	SHV	Grant, LaSalle	60 min
May 10, 6:28 PM CDT	Special Weather Statement	SHV	LaSalle	47 min
May 10, 6:36 PM CDT	Special Weather Statement	SHV	De Soto, Red River	39 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2021 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.