Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 110, NWS Tulsa, OK

May 27, 2021LeFlore County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 27, 2021, 8:52 PM CDT for LeFlore County, Oklahoma. It was in force for 53 min. 1 report 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, 8:52 PM CDT (01:52 UTC)
Expired: May 27, 2021, 9:45 PM CDT
In force: 53 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Possible
Hail: 1.25 in
Wind: 60.0 mph

County LeFlore County, OK

The radar

The Western Arkansas radar (KSRX), 79 km from the middle of the area, began a volume at 01:57 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, 9:03 PM CDT	HAIL 1	Whitesboro, OK	REPORT FROM MPING: QUARTER (1.00 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

Shreveport, LA (KSHV), launched 00:00Z, 1.9 hours before the alert went out and 262 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: 686 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 1424 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 149 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted.

125 
WUUS54 KTSA 280152
SVRTSA
OKC079-280245-
/O.NEW.KTSA.SV.W.0110.210528T0152Z-210528T0245Z/

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

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Southern Le Flore County in southeastern Oklahoma...

* Until 945 PM CDT.

* At 852 PM CDT, a severe thunderstorm was located 4 miles east of
  Talimena State Park, moving east southeast at 40 mph.

  HAZARD...60 mph wind gusts and half dollar 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...
  Heavener...                       Fanshawe...
  Octavia...                        Talimena State Park...
  Lake Wister State Park...         Whitesboro...
  Muse...                           Big Cedar...
  Heavener Runestone State Park...  Hodgen...
  Summerfield...                    

LAT...LON 3464 9494 3468 9494 3468 9500 3472 9505
      3497 9489 3487 9445 3452 9446 3451 9447
      3451 9475
TIME...MOT...LOC 0152Z 290DEG 36KT 3481 9488 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...60MPH
 
$$

Lacy

2 follow-up statements

041 
WWUS54 KTSA 280207
SVSTSA

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

OKC079-280245-
/O.CON.KTSA.SV.W.0110.000000T0000Z-210528T0245Z/
Le Flore OK-
907 PM CDT Thu May 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM CDT
FOR SOUTHEASTERN LE FLORE COUNTY...

At 907 PM CDT, severe thunderstorms were located along a line
extending from 6 miles south of Lake Wister State Park to 4 miles
southwest of Muse, moving southeast at 40 mph.

HAZARD...60 mph wind gusts and half dollar 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...
Heavener...                       Octavia...
Lake Wister State Park...         Muse...
Big Cedar...                      Hodgen...

LAT...LON 3462 9491 3478 9483 3494 9476 3487 9445
      3452 9446 3451 9447 3451 9475
TIME...MOT...LOC 0207Z 298DEG 34KT 3484 9472 3463 9482 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...60MPH
 
$$

Lacy

347 
WWUS54 KTSA 280243
SVSTSA

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

OKC079-280253-
/O.EXP.KTSA.SV.W.0110.000000T0000Z-210528T0245Z/
Le Flore OK-
943 PM CDT Thu May 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LE FLORE COUNTY
WILL EXPIRE AT 945 PM CDT...
    
The storms which prompted the warning have moved out of the area.
Therefore the warning will be allowed to expire.

LAT...LON 3462 9491 3478 9483 3494 9476 3487 9445
      3452 9446 3451 9447 3451 9475
TIME...MOT...LOC 0243Z 290DEG 36KT 3472 9431 3451 9441 

$$

Lacy

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 7:07 PM CDT	Tornado Warning	TSA	McIntosh	28 min
May 27, 7:27 PM CDT	Areal Flood Warning	TSA	Ottawa	12 hr
May 27, 7:30 PM CDT	Special Weather Statement	TSA	Muskogee	30 min
May 27, 7:32 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, McIntosh, Muskogee, Pittsburg	43 min
May 27, 7:33 PM CDT	Areal Flood Warning	TSA	Osage, Pawnee, Rogers, Tulsa, Washington	11 hr
May 27, 7:37 PM CDT	Flash Flood Warning	TSA	Adair, Cherokee, Haskell, McIntosh, Muskogee, Okfuskee and 3 more	3 hr
May 27, 7:49 PM CDT	Special Weather Statement	TSA	Sequoyah	26 min
May 27, 7:53 PM CDT	Special Weather Statement	TSA	Sequoyah	37 min
May 27, 7:54 PM CDT	River Flood Warning	TSA	Osage	19 hr
May 27, 7:55 PM CDT	River Flood Warning	TSA	Osage, Tulsa	31 hr
May 27, 7:56 PM CDT	River Flood Warning	TSA	Tulsa	44 hr
May 27, 7:58 PM CDT	River Flood Warning	TSA	Rogers, Tulsa	36 hr
May 27, 8:01 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore, Pittsburg	44 min
May 27, 8:03 PM CDT	Special Weather Statement	TSA	Latimer	27 min
May 27, 8:04 PM CDT	River Flood Advisory	TSA	Cherokee	49 hr
May 27, 8:24 PM CDT	Special Weather Statement	TSA	Latimer	36 min
May 27, 8:36 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore	39 min
May 27, 8:47 PM CDT	Flash Flood Warning	TSA	Haskell, Latimer, LeFlore, Pittsburg, Pushmataha, Sequoyah	2 hr
May 27, 8:51 PM CDT	Areal Flood Warning	TSA	Creek, Okfuskee, Okmulgee	10 hr
May 27, 8:54 PM CDT	Areal Flood Warning	TSA	Adair, Cherokee, Muskogee, Okmulgee, Wagoner	10 hr
May 27, 10:00 PM CDT	Flash Flood Warning	TSA	LeFlore	3 hr
May 27, 10:43 PM CDT	Areal Flood Warning	TSA	Adair, Cherokee, Haskell, McIntosh, Muskogee, Okfuskee and 3 more	8 hr
May 27, 10:47 PM CDT	Areal Flood Warning	TSA	Haskell, Latimer, LeFlore, Pittsburg, Pushmataha, Sequoyah	8 hr
May 28, 9:14 AM CDT	River Flood Warning	TSA	LeFlore	18 hr
May 28, 9:14 AM CDT	River Flood Advisory	TSA	Sequoyah	3 hr

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.