Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 133, NWS Tulsa, OK

July 10, 2021Creek County, Okfuskee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 10, 2021, 8:46 PM CDT for Creek County, Okfuskee County, Oklahoma. It was in force for 44 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: Jul 10, 2021, 8:46 PM CDT (01:46 UTC)
Expired: Jul 10, 2021, 9:30 PM CDT
In force: 44 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), 77 km from the middle of the area, began a volume at 01:48 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
Jul 10, 3:02 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 1.8 hours before the alert went out and 92 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: 2495 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 1225 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 185 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 14.8

Open this sounding in Storm Lab

The text

As transmitted.

742 
WUUS54 KTSA 110146
SVRTSA
OKC037-107-110230-
/O.NEW.KTSA.SV.W.0133.210711T0146Z-210711T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
846 PM CDT Sat Jul 10 2021

The National Weather Service in Tulsa has issued a

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

* Until 930 PM CDT.

* At 845 PM CDT, severe thunderstorms were located along a line
  extending from 2 miles east of Stroud to 2 miles northwest of
  Chandler, 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...
  Okemah...                         Okfuskee...
  Boley...                          Paden...
  Castle...                         Welty...
  Milfay...                         Mason...

This includes the following highways,
 Interstate 40 in Oklahoma between mile markers 215 and 224.
 Interstate 44 between mile markers 178 and 179.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3580 9662 3580 9660 3562 9619 3555 9619
      3555 9609 3545 9609 3539 9644 3546 9644
      3546 9647 3543 9650 3543 9652 3546 9654
      3544 9657 3541 9654 3539 9654 3541 9658
      3540 9662
TIME...MOT...LOC 0145Z 302DEG 32KT 3576 9662 3572 9692 

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

Lacy

2 follow-up statements

796 
WWUS54 KTSA 110202
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
902 PM CDT Sat Jul 10 2021

OKC037-107-110230-
/O.CON.KTSA.SV.W.0133.000000T0000Z-210711T0230Z/
Creek OK-Okfuskee OK-
902 PM CDT Sat Jul 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR SOUTHWESTERN CREEK AND OKFUSKEE COUNTIES...

At 901 PM CDT, severe thunderstorms were located along a line
extending from near Welty to 6 miles east of Sparks, moving southeast
at 45 mph.

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

SOURCE...Radar indicated.

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

Locations in or near the path include...
Okemah...                         Okfuskee...
Boley...                          Paden...
Castle...                         Welty...
Milfay...                         Mason...

This includes the following highways,
 Interstate 40 in Oklahoma between mile markers 215 and 224.
 Interstate 44 between mile markers 178 and 179.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3580 9662 3580 9660 3562 9619 3555 9619
      3555 9609 3545 9609 3539 9644 3546 9644
      3546 9647 3543 9650 3543 9652 3546 9654
      3544 9657 3541 9654 3539 9654 3541 9658
      3540 9662
TIME...MOT...LOC 0201Z 302DEG 40KT 3565 9641 3561 9671 

HAIL...0.75IN
WIND...60MPH
 
$$

Lacy

434 
WWUS54 KTSA 110227
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
927 PM CDT Sat Jul 10 2021

OKC037-107-110237-
/O.EXP.KTSA.SV.W.0133.000000T0000Z-210711T0230Z/
Creek OK-Okfuskee OK-
927 PM CDT Sat Jul 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CREEK AND
OKFUSKEE COUNTIES WILL EXPIRE AT 930 PM CDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
northeastern and east central Oklahoma.

LAT...LON 3580 9662 3580 9660 3562 9619 3555 9619
      3555 9609 3545 9609 3539 9644 3546 9644
      3546 9647 3543 9650 3543 9652 3546 9654
      3544 9657 3541 9654 3539 9654 3541 9658
      3540 9662
TIME...MOT...LOC 0227Z 302DEG 32KT 3553 9619 3550 9648 

$$

Lacy

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 7:08 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee	52 min
Jul 10, 7:25 PM CDT	Special Weather Statement	TSA	Cherokee, Muskogee, Sequoyah	35 min
Jul 10, 7:27 PM CDT	Special Weather Statement	TSA	Tulsa, Wagoner	33 min
Jul 10, 7:35 PM CDT	Areal Flood Advisory	TSA	Cherokee, Creek, Mayes, Osage, Pawnee, Rogers and 2 more	3 hr
Jul 10, 7:49 PM CDT	Special Weather Statement	TSA	Tulsa	26 min
Jul 10, 7:51 PM CDT	Severe Thunderstorm Warning	TSA	Creek	39 min
Jul 10, 7:58 PM CDT	Special Weather Statement	TSA	Adair, Sequoyah	32 min
Jul 10, 8:11 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Mayes, Muskogee, Rogers, Tulsa, Wagoner	49 min
Jul 10, 8:23 PM CDT	Special Weather Statement	TSA	Sequoyah	37 min
Jul 10, 8:26 PM CDT	Special Weather Statement	TSA	Creek, Okfuskee, Okmulgee	49 min
Jul 10, 8:28 PM CDT	Special Weather Statement	TSA	Sequoyah	32 min
Jul 10, 8:39 PM CDT	Severe Thunderstorm Warning	TSA	Creek, McIntosh, Okmulgee	51 min
Jul 10, 8:40 PM CDT	Areal Flood Advisory	TSA	Adair, Cherokee, Creek, Muskogee, Okmulgee, Sequoyah and 2 more	3 hr
Jul 10, 8:43 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Muskogee, Sequoyah, Wagoner	29 min
Jul 10, 9:17 PM CDT	Special Weather Statement	TSA	Okfuskee	43 min
Jul 10, 9:20 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	40 min
Jul 10, 9:23 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Okmulgee	34 min
Jul 10, 9:56 PM CDT	Special Weather Statement	TSA	Latimer, Pittsburg	49 min
Jul 10, 10:21 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore, Pittsburg	39 min
Jul 10, 10:22 PM CDT	Areal Flood Advisory	TSA	Creek, Haskell, McIntosh, Muskogee, Okfuskee, Okmulgee and 1 more	3 hr
Jul 10, 10:41 PM CDT	Special Weather Statement	TSA	Pittsburg	34 min
Jul 10, 10:50 PM CDT	Special Weather Statement	TSA	Latimer, LeFlore	25 min
Jul 10, 11:07 PM CDT	Special Weather Statement	TSA	LeFlore	38 min
Jul 10, 11:10 PM CDT	Special Weather Statement	TSA	Pittsburg	35 min
Jul 11, 12:05 AM CDT	Special Weather Statement	TSA	Pushmataha	55 min
Jul 11, 12:43 AM CDT	Special Weather Statement	TSA	Choctaw, Pushmataha	47 min
Jul 11, 1:28 AM CDT	Special Weather Statement	TSA	Choctaw	62 min
Jul 11, 1:56 AM CDT	Areal Flood Advisory	TSA	Choctaw	3 hr
Jul 11, 2:27 AM CDT	Special Weather Statement	TSA	Choctaw	63 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.