Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 107, NWS Tulsa, OK

May 27, 20214 counties in Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 27, 2021, 7:32 PM CDT for 4 counties in Oklahoma. It was in force for 43 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: May 27, 2021, 7:32 PM CDT (00:32 UTC)
Expired: May 27, 2021, 8:15 PM CDT
In force: 43 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Possible
Hail: 1.75 in
Wind: 70.0 mph

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

The radar

The Western Arkansas radar (KSRX), 95 km from the middle of the area, began a volume at 00:36 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
May 27, 7:32 PM CDT	HAIL 1.75	2 Se Eufaula, OK	CORRECTS PREVIOUS HAIL REPORT FROM 2 SE EUFAULA.
May 27, 7:49 PM CDT	HAIL 0.7	5 Se Eufaula, OK

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
May 27, 11:58 AM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.5 hours before the alert went out and 319 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: 1480 J/kg
Mixed-layer CIN: -150 J/kg
Mixed-layer LCL: 1331 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 203 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

As transmitted.

495 
WUUS54 KTSA 280032
SVRTSA
OKC061-091-101-121-280115-
/O.NEW.KTSA.SV.W.0107.210528T0032Z-210528T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
732 PM CDT Thu May 27 2021

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Haskell County in southeastern Oklahoma...
  Eastern McIntosh County in southeastern Oklahoma...
  Northeastern Pittsburg County in southeastern Oklahoma...
  Southeastern Muskogee County in east central Oklahoma...

* Until 815 PM CDT.

* At 732 PM CDT, a severe thunderstorm was located 4 miles northeast
  of Canadian, moving east at 45 mph.

  HAZARD...Golf ball size hail and 70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           considerable tree damage. Wind damage is also likely to 
           mobile homes, roofs, and outbuildings.

* Locations in or near the path include...
  Eufaula...                        Stigler...
  Quinton...                        Porum...
  Crowder...                        Whitefield...
  Kinta...                          Canadian...
  Indianola...                      Briartown...
  Vivian...                         Arrowhead State Park...
  Enterprise...                     Lake Eufaula State Park...
  Lequire...                        Kanima...
  Featherston...                    Onapa...
  Lewisville...                     

This includes Interstate 40 in Oklahoma between mile markers 257 and
261.
 
A Tornado Watch remains in effect until 900 PM CDT for southeastern
and east central Oklahoma.

LAT...LON 3547 9565 3537 9496 3506 9507 3506 9534
      3505 9535 3513 9579
TIME...MOT...LOC 0032Z 280DEG 41KT 3522 9561 

TORNADO...POSSIBLE
HAIL...1.75IN
WIND...70MPH
 
$$

Lacy

1 follow-up statement

346 
WWUS54 KTSA 280046
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
746 PM CDT Thu May 27 2021

OKC091-280056-
/O.CAN.KTSA.SV.W.0107.000000T0000Z-210528T0115Z/
McIntosh OK-
746 PM CDT Thu May 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN MCINTOSH COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore the warning has been cancelled.

A Tornado Watch remains in effect until 900 PM CDT for southeastern
and east central Oklahoma.

LAT...LON 3518 9577 3520 9568 3523 9567 3525 9563
      3524 9560 3523 9562 3522 9561 3527 9551
      3528 9552 3530 9550 3529 9546 3533 9539
      3529 9535 3543 9534 3537 9496 3506 9507
      3506 9534 3505 9535 3513 9579
TIME...MOT...LOC 0046Z 285DEG 33KT 3521 9547 

$$

OKC061-101-121-280115-
/O.CON.KTSA.SV.W.0107.000000T0000Z-210528T0115Z/
Haskell OK-Pittsburg OK-Muskogee OK-
746 PM CDT Thu May 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR HASKELL...NORTHEASTERN PITTSBURG AND SOUTHEASTERN MUSKOGEE
COUNTIES...

At 746 PM CDT, a severe thunderstorm was located 5 miles west of
Enterprise, moving east at 40 mph.

HAZARD...Tennis ball size hail and 70 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings.

Locations in or near the path include...
Stigler...                        Quinton...
Porum...                          Crowder...
Whitefield...                     Kinta...
Canadian...                       Indianola...
Briartown...                      Arrowhead State Park...
Enterprise...                     Lequire...
Kanima...                         Featherston...
Lewisville...                     

A Tornado Watch remains in effect until 900 PM CDT for southeastern
and east central Oklahoma.

LAT...LON 3518 9577 3520 9568 3523 9567 3525 9563
      3524 9560 3523 9562 3522 9561 3527 9551
      3528 9552 3530 9550 3529 9546 3533 9539
      3529 9535 3543 9534 3537 9496 3506 9507
      3506 9534 3505 9535 3513 9579
TIME...MOT...LOC 0046Z 285DEG 33KT 3521 9547 

TORNADO...POSSIBLE
HAIL...2.50IN
WIND...70MPH
 
$$

Lacy

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 7:07 PM CDT	Tornado Warning	TSA	McIntosh	28 min
May 27, 7:27 PM CDT	Areal Flood Warning	TSA	Ottawa	12 hr
May 27, 7:30 PM CDT	Special Weather Statement	TSA	Muskogee	30 min
May 27, 7:33 PM CDT	Areal Flood Warning	TSA	Osage, Pawnee, Rogers, Tulsa, Washington	11 hr
May 27, 7:37 PM CDT	Flash Flood Warning	TSA	Adair, Cherokee, Haskell, McIntosh, Muskogee, Okfuskee and 3 more	3 hr
May 27, 7:49 PM CDT	Special Weather Statement	TSA	Sequoyah	26 min
May 27, 7:53 PM CDT	Special Weather Statement	TSA	Sequoyah	37 min
May 27, 7:54 PM CDT	River Flood Warning	TSA	Osage	19 hr
May 27, 7:55 PM CDT	River Flood Warning	TSA	Osage, Tulsa	31 hr
May 27, 7:56 PM CDT	River Flood Warning	TSA	Tulsa	44 hr
May 27, 7:58 PM CDT	River Flood Warning	TSA	Rogers, Tulsa	36 hr
May 27, 8:01 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore, Pittsburg	44 min
May 27, 8:03 PM CDT	Special Weather Statement	TSA	Latimer	27 min
May 27, 8:04 PM CDT	River Flood Advisory	TSA	Cherokee	49 hr
May 27, 8:24 PM CDT	Special Weather Statement	TSA	Latimer	36 min
May 27, 8:36 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore	39 min
May 27, 8:47 PM CDT	Flash Flood Warning	TSA	Haskell, Latimer, LeFlore, Pittsburg, Pushmataha, Sequoyah	2 hr
May 27, 8:51 PM CDT	Areal Flood Warning	TSA	Creek, Okfuskee, Okmulgee	10 hr
May 27, 8:52 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	53 min
May 27, 8:54 PM CDT	Areal Flood Warning	TSA	Adair, Cherokee, Muskogee, Okmulgee, Wagoner	10 hr
May 27, 10:00 PM CDT	Flash Flood Warning	TSA	LeFlore	3 hr
May 27, 10:43 PM CDT	Areal Flood Warning	TSA	Adair, Cherokee, Haskell, McIntosh, Muskogee, Okfuskee and 3 more	8 hr
May 27, 10:47 PM CDT	Areal Flood Warning	TSA	Haskell, Latimer, LeFlore, Pittsburg, Pushmataha, Sequoyah	8 hr
May 28, 9:14 AM CDT	River Flood Warning	TSA	LeFlore	18 hr
May 28, 9:14 AM CDT	River Flood Advisory	TSA	Sequoyah	3 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 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.