Alert archive / Arkansas / Tornado Warnings in 2021

Tornado Warning 19, NWS Tulsa, OK

April 28, 2021Sebastian County, Arkansas; LeFlore County, Oklahoma

NWS Tulsa, OK issued this tornado warning at Apr 28, 2021, 9:14 PM CDT for Sebastian County, Arkansas; LeFlore County, Oklahoma. It was in force for 31 min. 3 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, 9:14 PM CDT (02:14 UTC)
Expired: Apr 28, 2021, 9:45 PM CDT
In force: 31 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Sebastian County, AR, LeFlore County, OK

The radar

The Western Arkansas radar (KSRX), 16 km from the middle of the area, began a volume at 02:18 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, 9:21 PM CDT	TSTM WND GST 73	2 Sw Rock Island, OK	REPORTED FROM MEDIA STORM TRACKER.
Apr 28, 9:25 PM CDT	HAIL 1	Bonanza, AR	FIRE DEPARTMENT REPORTS PEA TO QUARTER SIZE HAIL.
Apr 28, 9:33 PM CDT	TORNADO	Greenwood, AR	REPORTED ON HIGHWAY 10.

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, 2.2 hours before the alert went out and 201 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.

272 
WFUS54 KTSA 290214
TORTSA
ARC131-OKC079-290245-
/O.NEW.KTSA.TO.W.0019.210429T0214Z-210429T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Tulsa OK
914 PM CDT Wed Apr 28 2021

The National Weather Service in Tulsa has issued a

* Tornado Warning for...
  West central Sebastian County in west central Arkansas...
  Northeastern Le Flore County in southeastern Oklahoma...

* Until 945 PM CDT.
    
* At 914 PM CDT, a severe thunderstorm with strong low level rotation
  that could produce a tornado at any time was located near Cameron,
  moving east at 30 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations in or near the path include...
  Greenwood...                      Pocola...
  Hackett...                        Bonanza...
  Midland...                        Cameron...
  Excelsior...                      Jenny Lind...
  Rock Island...                    Rye Hill...
  Jenson...                         Witcherville...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3510 9457 3524 9456 3529 9426 3509 9424
TIME...MOT...LOC 0214Z 263DEG 28KT 3516 9451 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

1 follow-up statement

538 
WWUS54 KTSA 290240 RRA
SVSTSA

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

ARC131-OKC079-290250-
/O.EXP.KTSA.TO.W.0019.000000T0000Z-210429T0245Z/
Sebastian AR-Le Flore OK-
940 PM CDT Wed Apr 28 2021

...THE TORNADO WARNING FOR WEST CENTRAL SEBASTIAN AND NORTHEASTERN LE
FLORE COUNTIES WILL EXPIRE AT 945 PM CDT...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore the warning will be allowed to expire.

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

LAT...LON 3510 9457 3524 9456 3529 9426 3509 9424
TIME...MOT...LOC 0240Z 263DEG 28KT 3518 9426 

$$

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, 9:19 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, 9:27 PM CDT	Severe Thunderstorm Warning	TSA	Franklin, Sebastian	48 min
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
Apr 28, 7:19 PM CDT	Special Weather Statement	TSA	LeFlore	41 min
Apr 28, 7:56 PM CDT	Special Weather Statement	TSA	Haskell, Latimer	49 min
Apr 28, 8:25 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore	50 min
Apr 28, 8:31 PM CDT	Flash Flood Warning	TSA	Haskell, Latimer, LeFlore, Pittsburg, Sequoyah	4 hr
Apr 28, 8:50 PM CDT	Tornado Warning	TSA	LeFlore	25 min
Apr 28, 10:21 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	28 min
Apr 28, 10:58 PM CDT	Special Weather Statement	TSA	Choctaw	47 min
Apr 29, 12:04 AM CDT	Special Weather Statement	TSA	Pushmataha	26 min
Apr 29, 12:25 AM CDT	Special Weather Statement	TSA	Pittsburg	35 min
Apr 29, 12:54 AM CDT	Special Weather Statement	TSA	LeFlore	36 min
Apr 29, 1:47 AM CDT	Areal Flood Advisory	TSA	Choctaw, LeFlore, Pushmataha	4 hr
Apr 29, 1:49 AM CDT	Special Weather Statement	TSA	Choctaw	41 min
Apr 29, 10:56 AM CDT	River Flood Warning	TSA	Cherokee	4 hr

Nearby

Tornado Warnings in Arkansas, 2021 Tornado Warnings in Oklahoma, 2021 Every tornado warning in 2021 Tornadoes 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.