Alert archive / Arkansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 41, NWS Shreveport, LA

March 30, 2021Union County, Arkansas; Union Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Mar 30, 2021, 8:54 PM CDT for Union County, Arkansas; Union Parish, Louisiana. It was in force for 36 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: Mar 30, 2021, 8:54 PM CDT (01:54 UTC)
Expired: Mar 30, 2021, 9:30 PM CDT
In force: 36 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Union County, AR, Union Parish, LA

The radar

The Shreveport radar (KSHV), 168 km from the middle of the area, began a volume at 01:54 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
Mar 30, 8:54 PM CDT	TSTM WND DMG	8 Ese Farmerville, LA	TREES DOWN ACROSS ROADS IN THE ANTIOCH COMMUNITY.
Mar 30, 8:54 PM CDT	TORNADO	8 Ese Farmerville, LA	AN EF1 TORNADO BEGAN NEAR THE INTERSECTION OF LA HWY 2 AND LES PARKER RD NEAR THE NOLAN PLACE SUBDIVISION. MOST OF THE DAMAGE CONSISTED OF LARGE BROKEN TREE BRANCHES AND SPORADIC UPROOTS AND SNAPS OF TREES, BUT A SMALL METAL OUTBUILDING WAS DESTROYED. PATH LEN

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 00:00Z, 1.9 hours before the alert went out and 159 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: 1017 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 909 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 169 m²/s²
0-3 km storm-relative helicity: 170 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 7.1

Open this sounding in Storm Lab

The text

As transmitted.

532 
WUUS54 KSHV 310154
SVRSHV
ARC139-LAC111-310230-
/O.NEW.KSHV.SV.W.0041.210331T0154Z-210331T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
854 PM CDT Tue Mar 30 2021

The National Weather Service in Shreveport has issued a

* Severe Thunderstorm Warning for...
  Southeastern Union County in south central Arkansas...
  Eastern Union Parish in north central Louisiana...

* Until 930 PM CDT.

* At 853 PM CDT, a severe thunderstorm was located 9 miles east of
  Farmerville, or 15 miles north of Claiborne, moving northeast at 30
  mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Farmerville, Marion, Felsenthal, Rocky Branch, Loch Lomon, Spencer,
  Linville, Haile and Litroe.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3273 9207 3269 9209 3267 9214 3265 9216
      3263 9226 3280 9240 3307 9212 3303 9211
      3303 9209 3301 9207 3297 9207 3297 9208
      3292 9207 3287 9208 3284 9206 3283 9207
      3279 9205 3276 9206 3274 9205
TIME...MOT...LOC 0153Z 237DEG 28KT 3277 9223 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
 
$$

33

1 follow-up statement

448 
WWUS54 KSHV 310215
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
915 PM CDT Tue Mar 30 2021

ARC139-LAC111-310230-
/O.CON.KSHV.SV.W.0041.000000T0000Z-210331T0230Z/
Union AR-Union LA-
915 PM CDT Tue Mar 30 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR SOUTHEASTERN UNION COUNTY IN SOUTH CENTRAL ARKANSAS AND
NORTHEASTERN UNION PARISHES...

At 915 PM CDT, a severe thunderstorm was located 10 miles northwest
of Bastrop, moving northeast at 30 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Marion, Spencer, Linville and Haile. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3274 9216 3286 9224 3303 9211 3303 9209
      3301 9207 3297 9207 3297 9208 3292 9207
      3287 9208 3284 9206 3283 9207 3279 9205
      3276 9206
TIME...MOT...LOC 0215Z 237DEG 28KT 3287 9205 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
 
$$

33

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 31, 1:16 AM CDT	Special Weather Statement	SHV	Nevada	29 min
Mar 31, 2:47 AM CDT	Severe Thunderstorm Warning	SHV	Columbia, Hempstead, Lafayette, Little River, Miller, Nevada	43 min
Mar 31, 3:27 AM CDT	Lake Wind Advisory	SHV	Columbia, Lafayette, Miller, Union	16 hr
Mar 31, 3:30 AM CDT	Special Weather Statement	SHV	Columbia	45 min
Mar 31, 4:27 AM CDT	Special Weather Statement	SHV	Union	48 min
Mar 30, 8:36 PM CDT	Special Weather Statement	SHV	Union	39 min
Mar 30, 8:59 PM CDT	Tornado Warning Tornado observed	SHV	Union	31 min
Mar 31, 7:16 AM CDT	Special Weather Statement	SHV	Union	59 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.