Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 94, NWS Tulsa, OK

May 27, 2021Creek County, Okfuskee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 27, 2021, 3:42 PM CDT for Creek County, Okfuskee County, Oklahoma. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 27, 2021, 3:42 PM CDT (20:42 UTC)
Expired: May 27, 2021, 4:30 PM CDT
In force: 48 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Creek County, OK, Okfuskee County, OK

The radar

The Norman radar (KTLX), 88 km from the middle of the area, began a volume at 20:42 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.

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, 8.7 hours before the alert went out and 104 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.

715 
WUUS54 KTSA 272042
SVRTSA
OKC037-107-272130-
/O.NEW.KTSA.SV.W.0094.210527T2042Z-210527T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
342 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 430 PM CDT.

* At 342 PM CDT, severe thunderstorms were located along a line
  extending from 3 miles east of Avery to 2 miles north of Stroud to
  2 miles southeast of Davenport, moving east at 25 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations in or near the path include...
  Bristow...                        Okfuskee...
  Boley...                          Depew...
  Slick...                          Castle...
  Shamrock...                       Welty...
  Milfay...                         Mason...

This includes Interstate 44 between mile markers 178 and 198.
 
A Tornado Watch remains in effect until 700 PM CDT for northeastern
and east central Oklahoma.

LAT...LON 3593 9662 3591 9620 3563 9620 3544 9634
      3554 9662
TIME...MOT...LOC 2042Z 285DEG 22KT 3588 9669 3579 9666 3568 9674 

HAIL...1.00IN
WIND...60MPH
 
$$

Lacy

2 follow-up statements

222 
WWUS54 KTSA 272054
SVSTSA

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

OKC107-272103-
/O.CAN.KTSA.SV.W.0094.000000T0000Z-210527T2130Z/
Okfuskee OK-
354 PM CDT Thu May 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN OKFUSKEE COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning is no longer 
expected to move into northern Okfuskee county. Therefore the 
warning has been cancelled.

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

LAT...LON 3593 9662 3591 9620 3564 9620 3564 9662
TIME...MOT...LOC 2053Z 264DEG 23KT 3580 9657 

$$

OKC037-272130-
/O.CON.KTSA.SV.W.0094.000000T0000Z-210527T2130Z/
Creek OK-
354 PM CDT Thu May 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CDT
FOR SOUTHWESTERN CREEK COUNTY...

At 353 PM CDT, a severe thunderstorm was located 3 miles west of
Depew, moving east at 25 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations in or near the path include...
Bristow...                        Depew...
Slick...                          Shamrock...
Milfay...                         

This includes Interstate 44 between mile markers 178 and 198.
 
A Tornado Watch remains in effect until 700 PM CDT for northeastern
Oklahoma.

LAT...LON 3593 9662 3591 9620 3564 9620 3564 9662
TIME...MOT...LOC 2053Z 264DEG 23KT 3580 9657 

HAIL...1.00IN
WIND...60MPH
 
$$

Lacy

268 
WWUS54 KTSA 272125
SVSTSA

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

OKC037-272135-
/O.EXP.KTSA.SV.W.0094.000000T0000Z-210527T2130Z/
Creek OK-
425 PM CDT Thu May 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CREEK COUNTY WILL
EXPIRE AT 430 PM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore the warning will be
allowed to expire.

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

LAT...LON 3593 9662 3591 9620 3564 9620 3564 9662
TIME...MOT...LOC 2125Z 285DEG 22KT 3575 9634 

$$

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, 3:49 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
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.