Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 331, NWS Tulsa, OK

August 13, 20204 counties in Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 13, 2020, 4:33 AM CDT for 4 counties in Oklahoma. It was in force for 42 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: Aug 13, 2020, 4:33 AM CDT (09:33 UTC)
Expired: Aug 13, 2020, 5:15 AM CDT
In force: 42 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Creek County, OK, Okmulgee County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Tulsa radar (KINX), 45 km from the middle of the area, began a volume at 09:33 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 nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 9.6 hours before the alert went out and 154 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: 3207 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 1596 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 214 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 14.3

Open this sounding in Storm Lab

The text

As transmitted.

679 
WUUS54 KTSA 130933
SVRTSA
OKC037-111-143-145-131015-
/O.NEW.KTSA.SV.W.0331.200813T0933Z-200813T1015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
433 AM CDT Thu Aug 13 2020

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  East central Creek County in northeastern Oklahoma...
  West central Wagoner County in northeastern Oklahoma...
  North central Okmulgee County in northeastern Oklahoma...
  Southeastern Tulsa County in northeastern Oklahoma...

* Until 515 AM CDT.

* At 432 AM CDT, a severe thunderstorm was located over Kiefer,
  moving southeast at 35 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...
  Broken Arrow...                   Okmulgee...
  Bixby...                          Sapulpa...
  Jenks...                          Glenpool...
  Kiefer...                         Mounds...
  Preston...                        Stonebluff...
  Liberty...                        Hectorville...
  Leonard...                        

This includes Interstate 44 near mile marker 212.
 
LAT...LON 3604 9608 3590 9565 3586 9571 3586 9577
      3581 9577 3565 9596 3589 9621
TIME...MOT...LOC 0932Z 305DEG 32KT 3592 9607 

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

1 follow-up statement

454 
WWUS54 KTSA 130958
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
458 AM CDT Thu Aug 13 2020

OKC037-143-145-131008-
/O.CAN.KTSA.SV.W.0331.000000T0000Z-200813T1015Z/
Creek OK-Wagoner OK-Tulsa OK-
458 AM CDT Thu Aug 13 2020

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CREEK...WEST
CENTRAL WAGONER AND SOUTHEASTERN TULSA COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area therefore the warning has been cancelled.

LAT...LON 3586 9595 3586 9577 3581 9577 3565 9596
      3581 9605
TIME...MOT...LOC 0958Z 305DEG 32KT 3579 9584 

$$

OKC111-131015-
/O.CON.KTSA.SV.W.0331.000000T0000Z-200813T1015Z/
Okmulgee OK-
458 AM CDT Thu Aug 13 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM CDT
FOR NORTH CENTRAL OKMULGEE COUNTY...

At 458 AM CDT, a severe thunderstorm was located 3 miles north of
Bald Hill, moving southeast at 35 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...
Okmulgee...                       Preston...
Liberty...                        Hectorville...

LAT...LON 3586 9595 3586 9577 3581 9577 3565 9596
      3581 9605
TIME...MOT...LOC 0958Z 305DEG 32KT 3579 9584 

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

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 12:24 AM CDT	Special Weather Statement	TSA	Osage	51 min
Aug 13, 12:50 AM CDT	Severe Thunderstorm Warning	TSA	Osage	40 min
Aug 13, 12:52 AM CDT	Special Weather Statement	TSA	Pawnee	53 min
Aug 13, 12:58 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	25 min
Aug 13, 1:21 AM CDT	Severe Thunderstorm Warning	TSA	Osage	54 min
Aug 13, 1:26 AM CDT	Severe Thunderstorm Warning	TSA	Osage	34 min
Aug 13, 1:59 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	61 min
Aug 13, 2:15 AM CDT	Severe Thunderstorm Warning	TSA	Osage	60 min
Aug 13, 2:20 AM CDT	Special Weather Statement	TSA	Osage	25 min
Aug 13, 2:27 AM CDT	Special Weather Statement	TSA	Tulsa	48 min
Aug 13, 2:40 AM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa	50 min
Aug 13, 2:53 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	52 min
Aug 13, 2:58 AM CDT	Special Weather Statement	TSA	Osage	47 min
Aug 13, 3:04 AM CDT	Severe Thunderstorm Warning	TSA	Osage	41 min
Aug 13, 3:06 AM CDT	Special Weather Statement	TSA	Creek	39 min
Aug 13, 3:07 AM CDT	Areal Flood Advisory	TSA	Osage, Pawnee, Tulsa	3 hr
Aug 13, 3:23 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Okmulgee, Tulsa	52 min
Aug 13, 3:26 AM CDT	Severe Thunderstorm Warning	TSA	Tulsa, Wagoner	49 min
Aug 13, 3:36 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Pawnee, Tulsa	39 min
Aug 13, 3:39 AM CDT	Flash Flood Warning	TSA	Tulsa	5 hr
Aug 13, 3:44 AM CDT	Severe Thunderstorm Warning	TSA	Osage	34 min
Aug 13, 3:54 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Muskogee, Okmulgee, Tulsa, Wagoner	51 min
Aug 13, 3:57 AM CDT	Areal Flood Advisory	TSA	Okmulgee, Tulsa, Wagoner	3 hr
Aug 13, 4:20 AM CDT	Special Weather Statement	TSA	Osage	40 min
Aug 13, 4:21 AM CDT	Special Weather Statement	TSA	Tulsa	39 min
Aug 13, 4:23 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, McIntosh, Muskogee, Okmulgee, Wagoner	52 min
Aug 13, 4:40 AM CDT	Special Weather Statement	TSA	Tulsa	35 min
Aug 13, 5:07 AM CDT	Special Weather Statement	TSA	Cherokee, Haskell, Sequoyah	53 min
Aug 13, 5:27 AM CDT	Severe Thunderstorm Warning	TSA	Haskell, Muskogee, Sequoyah	48 min
Aug 13, 5:29 AM CDT	Special Weather Statement	TSA	Tulsa	31 min
Aug 13, 6:01 AM CDT	Special Weather Statement	TSA	Sequoyah	44 min
Aug 13, 6:55 AM CDT	Areal Flood Advisory	TSA	Creek, Muskogee, Okmulgee, Tulsa, Wagoner	2 hr
Aug 13, 7:06 AM CDT	Special Weather Statement	TSA	Latimer	24 min
Aug 13, 7:32 AM CDT	Special Weather Statement	TSA	Latimer	28 min
Aug 13, 7:44 AM CDT	Areal Flood Advisory	TSA	Haskell, Latimer, LeFlore, McIntosh, Muskogee, Okmulgee and 1 more	3 hr
Aug 13, 8:16 AM CDT	Special Weather Statement	TSA	Latimer	44 min
Aug 13, 9:01 AM CDT	Special Weather Statement	TSA	LeFlore	44 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2020 Every severe thunderstorm warning in 2020

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.