Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 105, NWS Tulsa, OK

May 27, 2021McIntosh County, Muskogee County, Okmulgee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 27, 2021, 6:51 PM CDT for McIntosh County, Muskogee County, Okmulgee County, Oklahoma. It was in force for 39 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, 6:51 PM CDT (23:51 UTC)
Expired: May 27, 2021, 7:30 PM CDT
In force: 39 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Possible
Hail: 1.75 in
Wind: 60.0 mph

Counties McIntosh County, OK, Muskogee County, OK, Okmulgee County, OK

The radar

The Tulsa radar (KINX), 78 km from the middle of the area, began a volume at 23:55 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	HAIL 0.75	Dewar, OK	REPORT FROM MPING: DIME (0.75 IN.).

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, 11.9 hours before the alert went out and 150 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.

573 
WUUS54 KTSA 272351
SVRTSA
OKC091-101-111-280030-
/O.NEW.KTSA.SV.W.0105.210527T2351Z-210528T0030Z/

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

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Northern McIntosh County in southeastern Oklahoma...
  West central Muskogee County in east central Oklahoma...
  Southeastern Okmulgee County in northeastern Oklahoma...

* Until 730 PM CDT.

* At 651 PM CDT, a severe thunderstorm was located over Grayson,
  moving east at 30 mph.

  HAZARD...Golf ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* Locations in or near the path include...
  Okmulgee...                       Henryetta...
  Checotah...                       Morris...
  Dewar...                          Schulter...
  Grayson...                        Council Hill...
  Rentiesville...                   Hoffman...
  Lake Eufaula State Park...        Hitchita...
  Pierce...                         Onapa...

This includes Interstate 40 in Oklahoma between mile markers 243 and
265.
 
A Tornado Watch remains in effect until 900 PM CDT for southeastern,
northeastern and east central Oklahoma.

LAT...LON 3544 9599 3562 9596 3560 9550 3538 9549
TIME...MOT...LOC 2351Z 275DEG 26KT 3553 9589 

TORNADO...POSSIBLE
HAIL...1.75IN
WIND...60MPH
 
$$

Lacy

2 follow-up statements

574 
WWUS54 KTSA 280013
SVSTSA

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

OKC111-280021-
/O.CAN.KTSA.SV.W.0105.000000T0000Z-210528T0030Z/
Okmulgee OK-
713 PM CDT Thu May 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN OKMULGEE COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. However, a severe thunderstorm warning remains in 
effect for southeast Okmulgee county due to other storms.

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

LAT...LON 3555 9572 3560 9571 3560 9550 3538 9549
      3546 9581 3555 9582
TIME...MOT...LOC 0011Z 270DEG 22KT 3553 9575 

$$

OKC091-101-280030-
/O.CON.KTSA.SV.W.0105.000000T0000Z-210528T0030Z/
McIntosh OK-Muskogee OK-
713 PM CDT Thu May 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR NORTHEASTERN MCINTOSH AND WEST CENTRAL MUSKOGEE COUNTIES...

At 711 PM CDT, a severe thunderstorm was located 5 miles west of
Council Hill, moving east at 25 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations in or near the path include...
Checotah...                       Council Hill...
Rentiesville...                   Hitchita...
Onapa...                          

This includes Interstate 40 in Oklahoma between mile markers 251 and
265.
 
A Tornado Watch remains in effect until 900 PM CDT for southeastern,
northeastern and east central Oklahoma.

LAT...LON 3555 9572 3560 9571 3560 9550 3538 9549
      3546 9581 3555 9582
TIME...MOT...LOC 0011Z 270DEG 22KT 3553 9575 

TORNADO...POSSIBLE
HAIL...1.50IN
WIND...60MPH
 
$$

Lacy

866 
WWUS54 KTSA 280028
SVSTSA

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

OKC091-101-280037-
/O.EXP.KTSA.SV.W.0105.000000T0000Z-210528T0030Z/
McIntosh OK-Muskogee OK-
728 PM CDT Thu May 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MCINTOSH AND WEST
CENTRAL MUSKOGEE COUNTIES WILL EXPIRE AT 730 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning will be allowed to expire. However, a severe 
thunderstorm warning remains in effect for McIntosh county due to 
storms from the south.

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

LAT...LON 3555 9572 3560 9571 3560 9550 3538 9549
      3546 9581 3555 9582
TIME...MOT...LOC 0027Z 275DEG 26KT 3552 9561 

$$

Lacy

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, 6:59 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Okfuskee, Okmulgee, Pittsburg	46 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.