Alert archive / Arkansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 56, NWS Tulsa, OK

April 28, 2021Carroll County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 28, 2021, 9:04 AM CDT for Carroll County, Arkansas. It was in force for 26 min. 1 report 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, 9:04 AM CDT (14:04 UTC)
Expired: Apr 28, 2021, 9:30 AM CDT
In force: 26 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 70.0 mph

County Carroll County, AR

The radar

The Springfield radar (KSGF), 107 km from the middle of the area, began a volume at 14:05 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, 9:15 AM CDT	TSTM WND DMG	Oak Grove, AR	DAMAGE TO A BARN. PHOTO POSTED ON OFFICE FACEBOOK PAGE. TIME ESTIMATED VIA RADAR.

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, 3:01 AM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 2.1 hours before the alert went out and 78 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: 34 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 1441 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

864 
WUUS54 KTSA 281404
SVRTSA
ARC015-281430-
/O.NEW.KTSA.SV.W.0056.210428T1404Z-210428T1430Z/

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

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Eastern Carroll County in northwestern Arkansas...

* Until 930 AM CDT.

* At 903 AM CDT, severe thunderstorms were located along a line
  extending from 5 miles northeast of Urbanette to 5 miles north of
  Marble, moving east at 35 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...
  Green Forest...                   Carrollton...
  Osage...                          Rule...
  Coin...                           Delmar...
  Denver...                         Connor...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

A Tornado Watch remains in effect until 1000 AM CDT for northwestern
Arkansas.

LAT...LON 3613 9347 3650 9347 3650 9330 3612 9330
TIME...MOT...LOC 1403Z 265DEG 30KT 3649 9348 3622 9361 

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

1 follow-up statement

114 
WWUS54 KTSA 281427
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
927 AM CDT Wed Apr 28 2021

ARC015-281437-
/O.EXP.KTSA.SV.W.0056.000000T0000Z-210428T1430Z/
Carroll AR-
927 AM CDT Wed Apr 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN CARROLL COUNTY WILL
EXPIRE AT 930 AM CDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning will be allowed to expire.  However gusty winds
and torrential rain are still possible with these thunderstorms.

A Tornado Watch remains in effect until 1000 AM CDT for northwestern
Arkansas.

LAT...LON 3613 9347 3650 9347 3650 9330 3612 9330
TIME...MOT...LOC 1427Z 265DEG 30KT 3651 9325 3624 9338 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 6:26 AM CDT	Tornado Warning	TSA	Washington	18 min
Apr 28, 6:47 AM CDT	Special Weather Statement	TSA	Washington	43 min
Apr 28, 7:04 AM CDT	Special Weather Statement	TSA	Benton	26 min
Apr 28, 7:20 AM CDT	Areal Flood Advisory	TSA	Benton, Washington	4 hr
Apr 28, 7:34 AM CDT	Special Weather Statement	TSA	Benton	26 min
Apr 28, 7:47 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll	43 min
Apr 28, 7:52 AM CDT	Flash Flood Warning	TSA	Benton, Washington	5 hr
Apr 28, 7:58 AM CDT	Special Weather Statement	TSA	Benton	32 min
Apr 28, 8:03 AM CDT	Tornado Warning Tornado observed	TSA	Benton	27 min
Apr 28, 8:13 AM CDT	Tornado Warning	TSA	Carroll	22 min
Apr 28, 8:16 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	44 min
Apr 28, 8:27 AM CDT	Special Weather Statement	TSA	Crawford, Washington	48 min
Apr 28, 8:29 AM CDT	Flash Flood Warning	TSA	Benton, Carroll, Madison, Washington	4 hr
Apr 28, 8:40 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll, Madison, Washington	50 min
Apr 28, 9:15 AM CDT	Special Weather Statement	TSA	Crawford, Franklin, Madison	45 min
Apr 28, 9:26 AM CDT	Special Weather Statement	TSA	Carroll	19 min
Apr 28, 9:42 AM CDT	Areal Flood Advisory	TSA	Carroll, Madison, Washington	3 hr
Apr 28, 9:56 AM CDT	Special Weather Statement	TSA	Carroll, Franklin, Madison	34 min
Apr 28, 9:58 AM CDT	River Flood Warning	TSA	Crawford	41 hr
Apr 28, 9:58 AM CDT	River Flood Warning	TSA	Crawford, Sebastian	41 hr
Apr 28, 9:58 AM CDT	River Flood Warning	TSA	Franklin, Johnson, Logan	70 hr
Apr 28, 10:34 AM CDT	Special Weather Statement	TSA	Franklin	41 min
Apr 28, 11:34 AM CDT	Areal Flood Advisory	TSA	Crawford, Franklin	3 hr
Apr 28, 11:52 AM CDT	Flash Flood Warning	TSA	Benton, Carroll, Crawford, Franklin, Madison, Washington	8 hr
Apr 28, 4:42 PM CDT	River Flood Advisory	TSA	Crawford, Franklin	19 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.