Alert archive / Arkansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 60, NWS Tulsa, OK

April 28, 2021Franklin County, Sebastian County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 28, 2021, 9:27 PM CDT for Franklin County, Sebastian County, Arkansas. It was in force for 48 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: Apr 28, 2021, 9:27 PM CDT (02:27 UTC)
Expired: Apr 28, 2021, 10:15 PM CDT
In force: 48 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Franklin County, AR, Sebastian County, AR

The radar

The Western Arkansas radar (KSRX), 24 km from the middle of the area, began a volume at 02:30 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.

What was reported inside it

Time	Report	Where	Remark
Apr 28, 9:33 PM CDT	TORNADO	Greenwood, AR	REPORTED ON HIGHWAY 10.
Apr 28, 9:38 PM CDT	TSTM WND DMG	1 N Dayton, AR	TREES DOWN ON HIGHWAY 252.

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
Apr 28, 7:55 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 2.5 hours before the alert went out and 188 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: 48 J/kg
Mixed-layer CIN: -143 J/kg
Mixed-layer LCL: 761 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 320 m²/s²
0-3 km storm-relative helicity: 258 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

As transmitted.

205 
WUUS54 KTSA 290227
SVRTSA
ARC047-131-290315-
/O.NEW.KTSA.SV.W.0060.210429T0227Z-210429T0315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
927 PM CDT Wed Apr 28 2021

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Southwestern Franklin County in west central Arkansas...
  Sebastian County in west central Arkansas...

* Until 1015 PM CDT.

* At 927 PM CDT, a severe thunderstorm was located over Excelsior,
  moving east at 40 mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations in or near the path include...
  Fort Smith...                     Charleston...
  Greenwood...                      Barling...
  Lavaca...                         Hackett...
  Huntington...                     Branch...
  Midland...                        Excelsior...
  Bloomer...                        Washburn...
  Burnville...                      Fort Chaffee...
  Jenny Lind...                     Central City...
  Arkola...                         Crossroads...
  Witcherville...                   Dayton...

This includes Interstate 540 between mile markers 12 and 13.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted, act quickly and move to a
place of safety inside a sturdy structure such as a basement or small
interior room.

&&

A Tornado Watch remains in effect until 200 AM CDT for northwestern
and west central Arkansas.

LAT...LON 3532 9392 3523 9392 3523 9403 3514 9403
      3514 9414 3510 9414 3506 9425 3506 9423
      3505 9423 3503 9436 3532 9442 3536 9426
      3535 9422 3537 9420 3546 9381 3531 9381
TIME...MOT...LOC 0227Z 259DEG 37KT 3518 9430 

HAIL...<.75IN
WIND...70MPH
 
$$

1 follow-up statement

384 
WWUS54 KTSA 290259
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
959 PM CDT Wed Apr 28 2021

ARC047-131-290315-
/O.CON.KTSA.SV.W.0060.000000T0000Z-210429T0315Z/
Franklin AR-Sebastian AR-
959 PM CDT Wed Apr 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT
FOR SOUTHWESTERN FRANKLIN AND NORTHEASTERN SEBASTIAN COUNTIES...

At 959 PM CDT, a severe thunderstorm was located 4 miles south of
Branch, moving east at 45 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations in or near the path include...
Charleston...                     Branch...
Fort Chaffee...                   Etna...
Peter Pender...                   Vesta...
Ursula...                         Meg...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.

&&

A Tornado Watch remains in effect until 200 AM CDT for west central
Arkansas.

LAT...LON 3532 9392 3523 9392 3523 9403 3514 9403
      3514 9408 3538 9414 3546 9381 3531 9381
TIME...MOT...LOC 0259Z 256DEG 37KT 3524 9396 

HAIL...1.00IN
WIND...70MPH
 
$$

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 28, 7:22 PM CDT	Special Weather Statement	TSA	Franklin	23 min
Apr 28, 7:34 PM CDT	Severe Thunderstorm Warning	TSA	Franklin	26 min
Apr 28, 7:42 PM CDT	Areal Flood Warning	TSA	Benton, Carroll, Crawford, Franklin, Madison, Washington	9 hr
Apr 28, 9:06 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Sebastian	39 min
Apr 28, 9:14 PM CDT	Tornado Warning	TSA	Sebastian	31 min
Apr 28, 9:19 PM CDT	Areal Flood Advisory	TSA	Crawford, Franklin, Sebastian	3 hr
Apr 28, 9:27 PM CDT	Flash Flood Warning	TSA	Crawford, Franklin, Sebastian	3 hr
Apr 28, 9:29 PM CDT	Tornado Warning Considerable damage threat	TSA	Sebastian	28 min
Apr 28, 10:40 PM CDT	Flash Flood Warning	TSA	Crawford, Franklin, Madison, Washington	4 hr
Apr 29, 12:19 AM CDT	Flash Flood Warning	TSA	Crawford, Franklin, Sebastian	6 hr
Apr 29, 2:13 AM CDT	Special Weather Statement	TSA	Franklin	32 min
Apr 29, 2:35 AM CDT	Flash Flood Warning	TSA	Crawford, Franklin, Madison, Washington	4 hr
Apr 29, 7:18 AM CDT	Areal Flood Warning	TSA	Crawford, Franklin, Sebastian	10 hr
Apr 29, 11:36 AM CDT	River Flood Warning	TSA	Crawford, Franklin	9 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.