Alert archive / Arkansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 60, NWS Shreveport, LA

April 9, 2021Union County, Arkansas

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 9, 2021, 4:30 PM CDT for Union County, Arkansas. It was in force for 30 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, 4:30 PM CDT (21:30 UTC)
Expired: Apr 9, 2021, 5:00 PM CDT
In force: 30 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Union County, AR

The radar

The Shreveport radar (KSHV), 169 km from the middle of the area, began a volume at 21:30 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.

Issued	Product	Office	Lasted
Apr 9, 12:07 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 9.5 hours before the alert went out and 160 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: 928 J/kg
Mixed-layer CIN: -310 J/kg
Mixed-layer LCL: 1043 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 61 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

519 
WUUS54 KSHV 092130
SVRSHV
ARC139-092200-
/O.NEW.KSHV.SV.W.0060.210409T2130Z-210409T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
430 PM CDT Fri Apr 9 2021

The National Weather Service in Shreveport has issued a

* Severe Thunderstorm Warning for...
  Eastern Union County in south central Arkansas...

* Until 500 PM CDT.

* At 430 PM CDT, a severe thunderstorm was located near Lapile, or 10
  miles northwest of Huttig, moving northeast at 40 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Huttig, Strong, Lapile, Felsenthal, New London and Pigeon Hill. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3304 9211 3301 9231 3330 9252 3332 9246
      3329 9247 3327 9242 3330 9235 3329 9236
      3328 9233 3326 9232 3328 9230 3326 9229
      3325 9223 3321 9223 3320 9221 3321 9218
      3316 9217 3316 9211 3311 9214
TIME...MOT...LOC 2130Z 237DEG 34KT 3318 9228 

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

19

1 follow-up statement

255 
WWUS54 KSHV 092144
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
444 PM CDT Fri Apr 9 2021

ARC139-092200-
/O.CON.KSHV.SV.W.0060.000000T0000Z-210409T2200Z/
Union AR-
444 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR SOUTHEASTERN UNION COUNTY...

At 443 PM CDT, a severe thunderstorm was located near Huttig, or 9 
miles south of Ingalls, moving northeast at 40 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Huttig, Lapile and Felsenthal. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3304 9211 3301 9231 3326 9228 3325 9223
      3321 9223 3320 9221 3321 9218 3316 9217
      3316 9211 3311 9214
TIME...MOT...LOC 2143Z 237DEG 34KT 3325 9216 

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

19

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 10:41 AM CDT	Special Weather Statement	SHV	Hempstead	49 min
Apr 9, 11:25 AM CDT	Special Weather Statement	SHV	Little River	50 min
Apr 9, 12:28 PM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Nevada	45 min
Apr 9, 12:34 PM CDT	Special Weather Statement	SHV	Nevada	41 min
Apr 9, 12:45 PM CDT	Severe Thunderstorm Warning	SHV	Little River	33 min
Apr 9, 1:49 PM CDT	Special Weather Statement	SHV	Lafayette, Miller	41 min
Apr 9, 2:03 PM CDT	Severe Thunderstorm Warning	SHV	Columbia, Hempstead, Lafayette, Miller, Nevada	30 min
Apr 9, 2:32 PM CDT	Severe Thunderstorm Warning	SHV	Columbia, Lafayette, Nevada, Union	43 min
Apr 9, 3:05 PM CDT	Severe Thunderstorm Warning	SHV	Columbia, Union	55 min
Apr 9, 3:57 PM CDT	Severe Thunderstorm Warning	SHV	Union	33 min
Apr 9, 5:01 PM CDT	Severe Thunderstorm Warning	SHV	Union	44 min
Apr 9, 5:58 PM CDT	Severe Thunderstorm Warning	SHV	Union	21 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 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.