Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 95, NWS Tulsa, OK

May 27, 20218 counties in Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 27, 2021, 3:49 PM CDT for 8 counties in Oklahoma. It was in force for 56 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, 3:49 PM CDT (20:49 UTC)
Expired: May 27, 2021, 4:45 PM CDT
In force: 56 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Craig County, OK, Mayes County, OK, Nowata County, OK, Osage County, OK, Pawnee County, OK, Rogers County, OK, Tulsa County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 41 km from the middle of the area, began a volume at 20:50 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, 4:00 PM CDT	TSTM WND GST 63	1.5 Sw Sperry, OK
May 27, 4:07 PM CDT	TSTM WND DMG	4 Sse Sperry, OK	TRAINED SPOTTER REPORTS TREES DOWN. TIME ESTIMATED FROM RADAR.

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

Springfield, MO (KSGF), launched 12:00Z, 8.8 hours before the alert went out and 167 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: 295 J/kg
Mixed-layer CIN: -229 J/kg
Mixed-layer LCL: 964 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 160 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

620 
WUUS54 KTSA 272049
SVRTSA
OKC035-097-105-113-117-131-143-147-272145-
/O.NEW.KTSA.SV.W.0095.210527T2049Z-210527T2145Z/

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

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Southwestern Craig County in northeastern Oklahoma...
  Rogers County in northeastern Oklahoma...
  Southeastern Osage County in northeastern Oklahoma...
  Northwestern Mayes County in northeastern Oklahoma...
  Washington County in northeastern Oklahoma...
  Southern Nowata County in northeastern Oklahoma...
  Southeastern Pawnee County in northeastern Oklahoma...
  Northeastern Tulsa County in northeastern Oklahoma...

* Until 445 PM CDT.

* At 348 PM CDT, severe thunderstorms were located along a line
  extending from 3 miles southeast of Dewey to near Ramona to 2 miles
  east of Walnut Creek State Park, moving east at 60 mph.

  HAZARD...70 mph wind gusts and quarter 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...
  Tulsa...                          Bartlesville...
  Sand Springs...                   Claremore...
  Vinita...                         Nowata...
  Owasso...                         Pryor Creek...
  Skiatook...                       Catoosa...
  Collinsville...                   Verdigris...
  Dewey...                          Chelsea...
  Inola...                          Sperry...
  Oologah...                        Adair...
  Ramona...                         Ochelata...

This includes Interstate 44 between mile markers 237 and 284.
 
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 700 PM CDT for northeastern
Oklahoma.

LAT...LON 3683 9513 3651 9513 3617 9546 3617 9640
      3650 9606 3679 9600
TIME...MOT...LOC 2048Z 259DEG 51KT 3676 9589 3652 9595 3625 9623 

HAIL...1.00IN
WIND...70MPH
 
$$

69

2 follow-up statements

140 
WWUS54 KTSA 272114
SVSTSA

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

OKC035-097-105-113-117-131-143-147-272145-
/O.CON.KTSA.SV.W.0095.000000T0000Z-210527T2145Z/
Craig OK-Rogers OK-Osage OK-Mayes OK-Washington OK-Nowata OK-
Pawnee OK-Tulsa OK-
414 PM CDT Thu May 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR SOUTHWESTERN CRAIG...ROGERS...SOUTHEASTERN OSAGE...NORTHWESTERN
MAYES...SOUTHERN WASHINGTON...SOUTHERN NOWATA...SOUTHEASTERN PAWNEE
AND NORTHEASTERN TULSA COUNTIES...

At 413 PM CDT, severe thunderstorms were located along a line
extending from 3 miles east of Nowata to 4 miles east of Oologah to 2
miles south of Tulsa International Airport, moving east at 45 mph.

HAZARD...70 mph wind gusts and quarter 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...
Tulsa...                          Sand Springs...
Claremore...                      Vinita...
Nowata...                         Owasso...
Pryor Creek...                    Skiatook...
Catoosa...                        Collinsville...
Verdigris...                      Chelsea...
Inola...                          Sperry...
Oologah...                        Adair...
Ramona...                         Foyil...
Westport...                       Talala...

This includes Interstate 44 between mile markers 237 and 284.
 
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 700 PM CDT for northeastern
Oklahoma.

LAT...LON 3651 9513 3617 9546 3617 9640 3635 9621
      3645 9600 3674 9582 3681 9513
TIME...MOT...LOC 2113Z 290DEG 37KT 3668 9557 3644 9563 3617 9591 

HAIL...1.00IN
WIND...70MPH
 
$$

69

174 
WWUS54 KTSA 272132
SVSTSA

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

OKC105-117-147-272142-
/O.CAN.KTSA.SV.W.0095.000000T0000Z-210527T2145Z/
Washington OK-Nowata OK-Pawnee OK-
432 PM CDT Thu May 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN WASHINGTON...SOUTHERN
NOWATA AND SOUTHEASTERN PAWNEE 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 700 PM CDT for northeastern
Oklahoma.

LAT...LON 3670 9513 3651 9513 3617 9546 3617 9619
      3637 9616 3642 9581 3659 9568 3660 9543
      3664 9543
TIME...MOT...LOC 2132Z 282DEG 42KT 3666 9534 3645 9538 3630 9547 3617
9565

$$

OKC035-097-113-131-143-272145-
/O.CON.KTSA.SV.W.0095.000000T0000Z-210527T2145Z/
Craig OK-Rogers OK-Osage OK-Mayes OK-Tulsa OK-
432 PM CDT Thu May 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR SOUTHWESTERN CRAIG...ROGERS...SOUTHEASTERN OSAGE...NORTHWESTERN
MAYES AND NORTHEASTERN TULSA COUNTIES...

At 432 PM CDT, severe thunderstorms were located along a line
extending from 5 miles northwest of White Oak to 6 miles west of
Adair to 5 miles northeast of Taiwah to 5 miles southeast of
Verdigris, moving east at 50 mph.

HAZARD...60 mph wind gusts and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations in or near the path include...
Tulsa...                          Sand Springs...
Claremore...                      Vinita...
Owasso...                         Pryor Creek...
Skiatook...                       Catoosa...
Collinsville...                   Verdigris...
Chelsea...                        Inola...
Sperry...                         Oologah...
Adair...                          Foyil...
Talala...                         Big Cabin...
Turley...                         Tulsa International Airport...

This includes Interstate 44 between mile markers 237 and 284.
 
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 700 PM CDT for northeastern
Oklahoma.

LAT...LON 3670 9513 3651 9513 3617 9546 3617 9619
      3637 9616 3642 9581 3659 9568 3660 9543
      3664 9543
TIME...MOT...LOC 2132Z 282DEG 42KT 3666 9534 3645 9538 3630 9547 3617
9565

HAIL...0.88IN
WIND...60MPH
 
$$

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, 3:51 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
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.