Alert archive / Oklahoma / Tornado Warnings in 2021

Tornado Warning 12, NWS Tulsa, OK

April 28, 2021Adair County, Oklahoma

NWS Tulsa, OK issued this tornado warning at Apr 28, 2021, 5:52 AM CDT for Adair County, Oklahoma. It was in force for 38 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, 5:52 AM CDT (10:52 UTC)
Expired: Apr 28, 2021, 6:30 AM CDT
In force: 38 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Adair County, OK

The radar

The Western Arkansas radar (KSRX), 67 km from the middle of the area, began a volume at 10:53 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, 6:12 AM CDT	TORNADO	3 Nnw Stilwell, OK	EF1 TORNADO UPROOTED TREES, DAMAGED AND DESTROYED SEVERAL BARNS. SEVERAL HOMES DAMAGED.
Apr 28, 6:15 AM CDT	TSTM WND DMG	2 Nne Marietta, OK	LARGE BROKEN TREE LIMBS, DAMAGE TO POWER LINES, DAMAGE TO A BARN. POSSIBLE TORNADO. 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 00:00Z, 10.9 hours before the alert went out and 143 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: 936 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 823 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

988 
WFUS54 KTSA 281052
TORTSA
OKC001-281130-
/O.NEW.KTSA.TO.W.0012.210428T1052Z-210428T1130Z/

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

The National Weather Service in Tulsa has issued a

* Tornado Warning for...
  Central Adair County in northeastern Oklahoma...

* Until 630 AM CDT.
    
* At 552 AM CDT, a severe thunderstorm capable of producing a tornado
  was located 7 miles southwest of Maryetta, moving northeast 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...
  Stilwell...                       Westville...
  Adair State Park...               Baron...
  Maryetta...                       

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.

&&

LAT...LON 3574 9481 3585 9481 3602 9454 3580 9450
TIME...MOT...LOC 1052Z 239DEG 25KT 3579 9477 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

3 follow-up statements

210 
WWUS54 KTSA 281105
SVSTSA

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

OKC001-281130-
/O.CON.KTSA.TO.W.0012.000000T0000Z-210428T1130Z/
Adair OK-
605 AM CDT Wed Apr 28 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 AM CDT FOR CENTRAL
ADAIR COUNTY...
    
At 605 AM CDT, a severe thunderstorm capable of producing a tornado
was located over Maryetta, moving northeast at 25 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...
Stilwell...                       Westville...
Adair State Park...               Baron...
Maryetta...                       

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.

&&

LAT...LON 3578 9473 3585 9478 3602 9454 3583 9451
TIME...MOT...LOC 1105Z 235DEG 24KT 3584 9469 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

311 
WWUS54 KTSA 281112
SVSTSA

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

OKC001-281130-
/O.CON.KTSA.TO.W.0012.000000T0000Z-210428T1130Z/
Adair OK-
612 AM CDT Wed Apr 28 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 AM CDT FOR CENTRAL
ADAIR COUNTY...
    
At 612 AM CDT, a severe thunderstorm capable of producing a tornado
was located near Maryetta, moving northeast 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...
Westville...                      Baron...
Maryetta...                       

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.

&&

LAT...LON 3583 9466 3587 9470 3602 9454 3587 9452
TIME...MOT...LOC 1112Z 234DEG 25KT 3587 9463 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

556 
WWUS54 KTSA 281120
SVSTSA

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

OKC001-281130-
/O.CON.KTSA.TO.W.0012.000000T0000Z-210428T1130Z/
Adair OK-
620 AM CDT Wed Apr 28 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 AM CDT FOR EAST
CENTRAL ADAIR COUNTY...
    
At 620 AM CDT, a severe thunderstorm capable of producing a tornado
was located near Baron, moving northeast at 25 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...
Westville...                      Baron...

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.

&&

LAT...LON 3585 9460 3590 9464 3602 9454 3587 9452
TIME...MOT...LOC 1120Z 230DEG 20KT 3590 9459 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 1:54 AM CDT	Special Weather Statement	TSA	Craig, Osage, Rogers, Washington	21 min
Apr 28, 2:16 AM CDT	Special Weather Statement	TSA	Craig	29 min
Apr 28, 2:20 AM CDT	Tornado Warning	TSA	Okfuskee, Okmulgee	40 min
Apr 28, 2:57 AM CDT	Tornado Warning	TSA	Muskogee, Okmulgee	15 min
Apr 28, 5:12 AM CDT	Special Weather Statement	TSA	Adair	33 min
Apr 28, 5:19 AM CDT	Special Weather Statement	TSA	Okmulgee	26 min
Apr 28, 5:22 AM CDT	Special Weather Statement	TSA	Sequoyah	23 min
Apr 28, 5:44 AM CDT	Special Weather Statement	TSA	Okmulgee	16 min
Apr 28, 5:48 AM CDT	Special Weather Statement	TSA	Adair	27 min
Apr 28, 5:54 AM CDT	Special Weather Statement	TSA	McIntosh	36 min
Apr 28, 6:03 AM CDT	Special Weather Statement	TSA	Sequoyah	27 min
Apr 28, 6:23 AM CDT	Special Weather Statement	TSA	McIntosh	37 min
Apr 28, 6:26 AM CDT	Tornado Warning	TSA	Adair	18 min
Apr 28, 6:45 AM CDT	Areal Flood Advisory	TSA	Adair, Cherokee, Muskogee, Sequoyah	5 hr
Apr 28, 6:53 AM CDT	Special Weather Statement	TSA	Muskogee	52 min
Apr 28, 7:43 AM CDT	Special Weather Statement	TSA	Adair, Sequoyah	47 min
Apr 28, 7:52 AM CDT	Flash Flood Warning	TSA	Adair, Cherokee	5 hr
Apr 28, 8:29 AM CDT	Flash Flood Warning	TSA	Adair	4 hr
Apr 28, 9:15 AM CDT	River Flood Warning	TSA	Adair, Cherokee, Delaware	47 hr
Apr 28, 9:15 AM CDT	River Flood Warning	TSA	Cherokee	64 hr
Apr 28, 9:15 AM CDT	River Flood Warning	TSA	Cherokee	11 hr
Apr 28, 9:15 AM CDT	River Flood Warning	TSA	Adair, Delaware	41 hr
Apr 28, 9:18 AM CDT	River Flood Advisory	TSA	Cherokee, Delaware	23 hr
Apr 28, 9:22 AM CDT	River Flood Warning	TSA	Creek	7 hr
Apr 28, 9:35 AM CDT	Special Weather Statement	TSA	Pittsburg	40 min
Apr 28, 9:58 AM CDT	River Flood Warning	TSA	Sequoyah	41 hr
Apr 28, 10:01 AM CDT	River Flood Warning	TSA	Okmulgee	16 hr
Apr 28, 10:14 AM CDT	Special Weather Statement	TSA	McIntosh, Pittsburg	46 min
Apr 28, 10:38 AM CDT	Areal Flood Advisory	TSA	McIntosh, Pittsburg	3 hr
Apr 28, 10:40 AM CDT	Tornado Warning	TSA	McIntosh, Pittsburg	35 min
Apr 28, 10:49 AM CDT	Flash Flood Warning	TSA	Haskell, McIntosh, Muskogee, Pittsburg, Sequoyah	4 hr
Apr 28, 11:09 AM CDT	Tornado Warning	TSA	Haskell, McIntosh, Pittsburg	31 min
Apr 28, 11:42 AM CDT	Special Weather Statement	TSA	Haskell	33 min
Apr 28, 12:32 PM CDT	Areal Flood Warning	TSA	Adair, Cherokee, Delaware, Haskell, Latimer, McIntosh and 3 more	9 hr
Apr 28, 4:36 PM CDT	River Flood Warning	TSA	LeFlore	3 days

Nearby

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.