Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 99, NWS Tulsa, OK

May 27, 2021Creek County, Okfuskee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 27, 2021, 5:26 PM CDT for Creek County, Okfuskee County, Oklahoma. It was in force for 64 min. 3 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, 5:26 PM CDT (22:26 UTC)
Expired: May 27, 2021, 6:30 PM CDT
In force: 64 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

Counties Creek County, OK, Okfuskee County, OK

The radar

The Norman radar (KTLX), 82 km from the middle of the area, began a volume at 22:27 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, 5:40 PM CDT	HAIL 2.75	7 N Paden, OK
May 27, 5:40 PM CDT	HAIL 2.75	8 N Paden, OK
May 27, 5:44 PM CDT	TSTM WND DMG	Welty, OK	STRONG THUNDERSTORM WIND SNAPPED LARGE TREE LIMBS.

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, 10.4 hours before the alert went out and 97 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.

802 
WUUS54 KTSA 272226
SVRTSA
OKC037-107-272330-
/O.NEW.KTSA.SV.W.0099.210527T2226Z-210527T2330Z/

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

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Southwestern Creek County in northeastern Oklahoma...
  Northwestern Okfuskee County in east central Oklahoma...

* Until 630 PM CDT.

* At 526 PM CDT, a severe thunderstorm was located 5 miles east of
  Sparks, moving east at 35 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...
  Okfuskee...                       Boley...
  Paden...                          Castle...
  Welty...                          Mason...

A Tornado Watch remains in effect until 700 PM CDT for northeastern
and east central Oklahoma.

LAT...LON 3573 9662 3572 9619 3545 9619 3548 9663
TIME...MOT...LOC 2226Z 276DEG 31KT 3564 9673 

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

Lacy

2 follow-up statements

697 
WWUS54 KTSA 272236
SVSTSA

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

OKC037-107-272330-
/O.CON.KTSA.SV.W.0099.000000T0000Z-210527T2330Z/
Creek OK-Okfuskee OK-
536 PM CDT Thu May 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR SOUTHWESTERN CREEK AND NORTHWESTERN OKFUSKEE COUNTIES...

At 536 PM CDT, a pair of severe thunderstorms were located 5 miles 
north of Welty and 7 miles north of Prague, moving east at 35 mph.

HAZARD...Two inch 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...
Okfuskee...                       Boley...
Paden...                          Castle...
Welty...                          Mason...

A Tornado Watch remains in effect until 700 PM CDT for northeastern
and east central Oklahoma.

LAT...LON 3573 9662 3572 9619 3545 9619 3548 9663
TIME...MOT...LOC 2236Z 275DEG 32KT 3570 9640 3560 9666 

HAIL...2.00IN
WIND...60MPH
 
$$

Lacy

319 
WWUS54 KTSA 272304
SVSTSA

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

OKC037-272313-
/O.CAN.KTSA.SV.W.0099.000000T0000Z-210527T2330Z/
Creek OK-
604 PM CDT Thu May 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CREEK 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 700 PM CDT for northeastern
and east central Oklahoma.

LAT...LON 3564 9619 3545 9619 3547 9643 3564 9644
TIME...MOT...LOC 2303Z 275DEG 36KT 3556 9631 

$$

OKC107-272330-
/O.CON.KTSA.SV.W.0099.000000T0000Z-210527T2330Z/
Okfuskee OK-
604 PM CDT Thu May 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR NORTH CENTRAL OKFUSKEE COUNTY...

At 603 PM CDT, a severe thunderstorm was located 4 miles southwest of
Okfuskee, moving east at 40 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...
Okfuskee...                       Castle...
Welty...                          Mason...

A Tornado Watch remains in effect until 700 PM CDT for northeastern
and east central Oklahoma.

LAT...LON 3564 9619 3545 9619 3547 9643 3564 9644
TIME...MOT...LOC 2303Z 275DEG 36KT 3556 9631 

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

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, 5:39 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
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.