Alert archive / Oklahoma / Tornado Warnings in 2021

Tornado Warning 17, NWS Tulsa, OK

April 28, 2021Haskell County, McIntosh County, Pittsburg County, Oklahoma

NWS Tulsa, OK issued this tornado warning at Apr 28, 2021, 11:09 AM CDT for Haskell County, McIntosh County, Pittsburg County, Oklahoma. It was in force for 31 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 28, 2021, 11:09 AM CDT (16:09 UTC)
Expired: Apr 28, 2021, 11:40 AM CDT
In force: 31 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Haskell County, OK, McIntosh County, OK, Pittsburg County, OK

The radar

The Tulsa radar (KINX), 110 km from the middle of the area, began a volume at 16:08 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 nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 4.2 hours before the alert went out and 250 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.

784 
WFUS54 KTSA 281609
TORTSA
OKC061-091-121-281700-
/O.NEW.KTSA.TO.W.0017.210428T1609Z-210428T1700Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Tulsa OK
1109 AM CDT Wed Apr 28 2021

The National Weather Service in Tulsa has issued a

* Tornado Warning for...
  West central Haskell County in southeastern Oklahoma...
  Southeastern McIntosh County in southeastern Oklahoma...
  Northeastern Pittsburg County in southeastern Oklahoma...

* Until noon CDT.
    
* At 1109 AM CDT, a severe thunderstorm with strong low level
  rotation that could produce a tornado at any time was located near
  Crowder, 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...
  Eufaula...                        Crowder...
  Canadian...                       Enterprise...
  Arrowhead State Park...           

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 3509 9573 3517 9577 3539 9542 3517 9529
TIME...MOT...LOC 1609Z 241DEG 26KT 3515 9570 

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

$$

3 follow-up statements

555 
WWUS54 KTSA 281619
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1119 AM CDT Wed Apr 28 2021

OKC061-091-121-281700-
/O.CON.KTSA.TO.W.0017.000000T0000Z-210428T1700Z/
Haskell OK-McIntosh OK-Pittsburg OK-
1119 AM CDT Wed Apr 28 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL NOON CDT FOR WEST
CENTRAL HASKELL...SOUTHEASTERN MCINTOSH AND NORTHEASTERN PITTSBURG
COUNTIES...
    
At 1119 AM CDT, a severe thunderstorm capable of producing a tornado
was located over Arrowhead State Park, 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...
Eufaula...                        Canadian...
Enterprise...                     Arrowhead State Park...

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 3513 9564 3521 9570 3539 9542 3517 9529
TIME...MOT...LOC 1619Z 242DEG 27KT 3518 9561 

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

$$

299 
WWUS54 KTSA 281633
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1133 AM CDT Wed Apr 28 2021

OKC061-091-121-281700-
/O.CON.KTSA.TO.W.0017.000000T0000Z-210428T1700Z/
Haskell OK-McIntosh OK-Pittsburg OK-
1133 AM CDT Wed Apr 28 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL NOON CDT FOR WEST
CENTRAL HASKELL...EAST CENTRAL MCINTOSH AND NORTHEASTERN PITTSBURG
COUNTIES...
    
At 1133 AM CDT, a severe thunderstorm capable of producing a tornado
was located 5 miles southeast of Eufaula, 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...
Enterprise...                     

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 3516 9554 3526 9558 3539 9542 3520 9531
TIME...MOT...LOC 1633Z 238DEG 27KT 3524 9550 

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

$$

381 
WWUS54 KTSA 281640
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1140 AM CDT Wed Apr 28 2021

OKC061-091-121-281650-
/O.CAN.KTSA.TO.W.0017.000000T0000Z-210428T1700Z/
Haskell OK-McIntosh OK-Pittsburg OK-
1140 AM CDT Wed Apr 28 2021

...THE TORNADO WARNING FOR WEST CENTRAL HASKELL...EAST CENTRAL
MCINTOSH AND NORTHEASTERN PITTSBURG COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

LAT...LON 3516 9554 3526 9558 3539 9542 3520 9531
TIME...MOT...LOC 1638Z 241DEG 26KT 3526 9546 

$$

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, 5:52 AM CDT	Tornado Warning	TSA	Adair	38 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, 11:42 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.