Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 106, NWS Tulsa, OK

May 27, 20214 counties in Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 27, 2021, 6:59 PM CDT for 4 counties in Oklahoma. It was in force for 46 min. 6 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, 6:59 PM CDT (23:59 UTC)
Expired: May 27, 2021, 7:45 PM CDT
In force: 46 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.75 in
Wind: 70.0 mph

Counties McIntosh County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK

The radar

The Tulsa radar (KINX), 105 km from the middle of the area, began a volume at 00:01 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, 7:09 PM CDT	TSTM WND DMG	1 E Checotah, OK	TREES DOWN JUST EAST OF CHECOTAH.
May 27, 7:11 PM CDT	TSTM WND DMG	4 N Hanna, OK	SEVERAL TREES DOWN AND ONE STRUCTURE DAMAGED.
May 27, 7:11 PM CDT	HAIL 0.75	Dewar, OK	REPORT FROM MPING: DIME (0.75 IN.).
May 27, 7:15 PM CDT	TORNADO	4 Ne Hanna, OK	EF 1 DAMAGE. UPROOTED TREES, SNAPPED TREES, POWER POLE DAMAGE, DAMAGE TO HOME.
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

Norman, OK (KOUN), launched 12:00Z, 12.0 hours before the alert went out and 148 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: 2431 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 765 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 264 m²/s²
0-3 km storm-relative helicity: 360 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 7.5

Open this sounding in Storm Lab

The text

As transmitted.

502 
WUUS54 KTSA 272359
SVRTSA
OKC091-107-111-121-280045-
/O.NEW.KTSA.SV.W.0106.210527T2359Z-210528T0045Z/

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

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  McIntosh County in southeastern Oklahoma...
  Northern Pittsburg County in southeastern Oklahoma...
  Southwestern Okmulgee County in northeastern Oklahoma...
  Southeastern Okfuskee County in east central Oklahoma...

* Until 745 PM CDT.

* At 659 PM CDT, severe thunderstorms were located along a line
  extending from 6 miles south of Okmulgee State Park to 4 miles
  northeast of Weleetka to 3 miles west of Dustin, moving east at 50
  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...                        Henryetta...
  Checotah...                       Weleetka...
  Dewar...                          Schulter...
  Crowder...                        Canadian...
  Indianola...                      Grayson...
  Hanna...                          Hoffman...
  Stidham...                        Raiford...
  Blocker...                        Vivian...
  Arrowhead State Park...           Lake Eufaula State Park...
  Hitchita...                       Bryant...

This includes Interstate 40 in Oklahoma between mile markers 230 and
267.
 
A Tornado Watch remains in effect until 900 PM CDT for southeastern,
northeastern and east central Oklahoma.

LAT...LON 3538 9612 3556 9612 3549 9546 3530 9544
      3529 9545 3516 9545 3503 9548 3503 9551
      3497 9551 3514 9601 3515 9599 3529 9598
      3529 9614
TIME...MOT...LOC 2359Z 286DEG 43KT 3552 9608 3537 9607 3525 9610 

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

Lacy

2 follow-up statements

084 
WWUS54 KTSA 280019
SVSTSA

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

OKC107-111-280028-
/O.CAN.KTSA.SV.W.0106.000000T0000Z-210528T0045Z/
Okmulgee OK-Okfuskee OK-
719 PM CDT Thu May 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN OKMULGEE AND
SOUTHEASTERN OKFUSKEE COUNTIES IS CANCELLED...

The storms which prompted the warning have 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 northeastern Oklahoma.

LAT...LON 3514 9601 3515 9598 3537 9598 3538 9588
      3546 9587 3547 9582 3553 9582 3549 9546
      3530 9544 3529 9545 3516 9545 3503 9548
      3503 9551 3497 9551
TIME...MOT...LOC 0018Z 286DEG 43KT 3546 9583 3531 9582 3519 9585 

$$

OKC091-121-280045-
/O.CON.KTSA.SV.W.0106.000000T0000Z-210528T0045Z/
McIntosh OK-Pittsburg OK-
719 PM CDT Thu May 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR MCINTOSH AND NORTHERN PITTSBURG COUNTIES...

At 718 PM CDT, severe thunderstorms were located along a line
extending from 2 miles south of Hoffman to 3 miles northwest of
Raiford to 2 miles southeast of Hanna, moving east at 50 mph.

HAZARD...70 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations in or near the path include...
Eufaula...                        Checotah...
Crowder...                        Canadian...
Indianola...                      Hanna...
Stidham...                        Raiford...
Blocker...                        Vivian...
Arrowhead State Park...           Lake Eufaula State Park...
Hitchita...                       Vernon...
Pierce...                         Featherston...
Onapa...                          

This includes Interstate 40 in Oklahoma between mile markers 244 and
267.
 
A Tornado Watch remains in effect until 900 PM CDT for southeastern 
and northeastern Oklahoma. A Tornado Warning also remains in effect 
for southern McIntosh county.

LAT...LON 3514 9601 3515 9598 3537 9598 3538 9588
      3546 9587 3547 9582 3553 9582 3549 9546
      3530 9544 3529 9545 3516 9545 3503 9548
      3503 9551 3497 9551
TIME...MOT...LOC 0018Z 286DEG 43KT 3546 9583 3531 9582 3519 9585 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...70MPH
 
$$

Lacy

764 
WWUS54 KTSA 280033
SVSTSA

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

OKC091-121-280045-
/O.CON.KTSA.SV.W.0106.000000T0000Z-210528T0045Z/
McIntosh OK-Pittsburg OK-
733 PM CDT Thu May 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR CENTRAL MCINTOSH AND NORTHERN PITTSBURG COUNTIES...

At 733 PM CDT, severe thunderstorms were located along a line
extending from near Lake Eufaula State Park to 3 miles south of
Eufaula to near Crowder, moving east at 60 mph.

HAZARD...70 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations in or near the path include...
Eufaula...                        Checotah...
Crowder...                        Canadian...
Indianola...                      Stidham...
Blocker...                        Vivian...
Arrowhead State Park...           Lake Eufaula State Park...
Pierce...                         Featherston...
Onapa...                          

This includes Interstate 40 in Oklahoma between mile markers 253 and
267.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

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

LAT...LON 3512 9594 3517 9593 3525 9575 3552 9571
      3549 9546 3530 9544 3529 9545 3516 9545
      3503 9548 3503 9551 3497 9551
TIME...MOT...LOC 0033Z 280DEG 51KT 3542 9559 3523 9558 3512 9565 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...70MPH
 
$$

69

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 9:08 AM CDT	River Flood Warning	TSA	Ottawa	29 hr
May 27, 9:58 AM CDT	River Flood Advisory	TSA	Cherokee	4 days
May 27, 10:46 AM CDT	Flash Flood Watch	TSA	Adair, Cherokee, Craig, Creek, Delaware, McIntosh and 11 more	11 hr
May 27, 11:31 AM CDT	Areal Flood Advisory	TSA	Ottawa	3 hr
May 27, 12:30 PM CDT	Special Weather Statement	TSA	Washington	45 min
May 27, 12:41 PM CDT	Special Weather Statement	TSA	Ottawa	34 min
May 27, 12:46 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Ottawa	44 min
May 27, 12:57 PM CDT	Severe Thunderstorm Warning	TSA	Osage	27 min
May 27, 1:12 PM CDT	Special Weather Statement	TSA	Nowata, Washington	63 min
May 27, 1:26 PM CDT	Special Weather Statement	TSA	Osage	34 min
May 27, 1:29 PM CDT	Special Weather Statement	TSA	Ottawa	46 min
May 27, 1:30 PM CDT	Flash Flood Warning	TSA	Ottawa	6 hr
May 27, 1:35 PM CDT	Areal Flood Advisory	TSA	Craig, Nowata	2 hr
May 27, 1:40 PM CDT	Areal Flood Advisory	TSA	Osage, Pawnee	3 hr
May 27, 1:55 PM CDT	Special Weather Statement	TSA	Osage	65 min
May 27, 2:36 PM CDT	Areal Flood Advisory	TSA	Osage, Washington	92 min
May 27, 2:37 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Rogers, Washington	53 min
May 27, 2:54 PM CDT	River Flood Warning	TSA	Cherokee	5 hr
May 27, 2:54 PM CDT	River Flood Advisory	TSA	Cherokee, Delaware	22 hr
May 27, 2:54 PM CDT	River Flood Advisory	TSA	Adair, Cherokee, Delaware	35 hr
May 27, 3:08 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa, Washington	52 min
May 27, 3:15 PM CDT	Special Weather Statement	TSA	Osage	45 min
May 27, 3:18 PM CDT	Severe Thunderstorm Warning	TSA	Creek	57 min
May 27, 3:23 PM CDT	Severe Thunderstorm Warning	TSA	Osage	37 min
May 27, 3:27 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Nowata, Rogers	63 min
May 27, 3:42 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee	48 min
May 27, 3:49 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Nowata, Osage, Pawnee, Rogers and 2 more	56 min
May 27, 3:51 PM CDT	Flash Flood Warning	TSA	Craig, Nowata	3 hr
May 27, 4:08 PM CDT	Flash Flood Warning	TSA	Osage, Washington	3 hr
May 27, 4:15 PM CDT	Special Weather Statement	TSA	Okmulgee	30 min
May 27, 4:18 PM CDT	Flash Flood Warning	TSA	Osage, Pawnee, Rogers, Tulsa, Washington	3 hr
May 27, 4:26 PM CDT	Special Weather Statement	TSA	Tulsa, Wagoner	34 min
May 27, 4:34 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes, Ottawa	56 min
May 27, 4:42 PM CDT	Areal Flood Advisory	TSA	Creek, Okmulgee, Rogers, Tulsa, Wagoner	3 hr
May 27, 4:46 PM CDT	Special Weather Statement	TSA	Delaware, Mayes	59 min
May 27, 4:51 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee	39 min
May 27, 4:59 PM CDT	Flash Flood Warning	TSA	Craig, Delaware, Mayes, Rogers	3 hr
May 27, 5:07 PM CDT	Special Weather Statement	TSA	Wagoner	38 min
May 27, 5:26 PM CDT	Special Weather Statement	TSA	Delaware	34 min
May 27, 5:26 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee	64 min
May 27, 5:39 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Muskogee, Wagoner	51 min
May 27, 5:47 PM CDT	Special Weather Statement	TSA	Okmulgee	43 min
May 27, 6:06 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	39 min
May 27, 6:07 PM CDT	Flash Flood Warning	TSA	Creek, Okfuskee, Okmulgee	3 hr
May 27, 6:10 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee, Okmulgee	50 min
May 27, 6:26 PM CDT	Flash Flood Warning	TSA	Adair, Cherokee, Muskogee, Okmulgee, Wagoner	2 hr
May 27, 6:34 PM CDT	Special Weather Statement	TSA	Cherokee	41 min
May 27, 6:35 PM CDT	Areal Flood Warning	TSA	Craig, Nowata	12 hr
May 27, 6:35 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee, Okmulgee	40 min
May 27, 6:51 PM CDT	Areal Flood Warning	TSA	Osage, Washington	12 hr
May 27, 6:51 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Okmulgee	39 min

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.