Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 490, NWS Norman, OK

September 28, 2021Carter County, Love County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Sep 28, 2021, 4:02 PM CDT for Carter County, Love County, Oklahoma. It was in force for 43 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: Sep 28, 2021, 4:02 PM CDT (21:02 UTC)
Expired: Sep 28, 2021, 4:45 PM CDT
In force: 43 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Carter County, OK, Love County, OK

The radar

The Norman radar (KTLX), 137 km from the middle of the area, began a volume at 21:03 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

Fort Worth, TX (KFWD), launched 12:00Z, 9.0 hours before the alert went out and 142 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: 115 J/kg
Mixed-layer CIN: -258 J/kg
Mixed-layer LCL: 1438 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

945 
WUUS54 KOUN 282102
SVROUN
OKC019-085-282145-
/O.NEW.KOUN.SV.W.0490.210928T2102Z-210928T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
402 PM CDT Tue Sep 28 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  North central Love County in southern Oklahoma...
  Southeastern Carter County in southern Oklahoma...

* Until 445 PM CDT.

* At 402 PM CDT, a severe thunderstorm was located 7 miles southwest
  of Lone Grove, moving northeast at 10 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Ardmore, Lone Grove, Dickson and northwestern Lake Murray. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3400 9731 3408 9742 3429 9721 3415 9699
TIME...MOT...LOC 2102Z 227DEG 10KT 3409 9730 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

11

2 follow-up statements

399 
WWUS54 KOUN 282117
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
417 PM CDT Tue Sep 28 2021

OKC019-085-282145-
/O.CON.KOUN.SV.W.0490.000000T0000Z-210928T2145Z/
Love OK-Carter OK-
417 PM CDT Tue Sep 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR NORTH CENTRAL LOVE AND SOUTH CENTRAL CARTER COUNTIES...

At 417 PM CDT, a severe thunderstorm was located 8 miles west of
Overbrook, moving east at 10 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Ardmore, Lone Grove and western Lake Murray. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3400 9731 3407 9740 3417 9720 3410 9709
TIME...MOT...LOC 2117Z 262DEG 7KT 3404 9729 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

11

033 
WWUS54 KOUN 282138
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
438 PM CDT Tue Sep 28 2021

OKC019-085-282148-
/O.EXP.KOUN.SV.W.0490.000000T0000Z-210928T2145Z/
Love OK-Carter OK-
438 PM CDT Tue Sep 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL LOVE AND SOUTH
CENTRAL CARTER COUNTIES WILL EXPIRE AT 445 PM CDT...
                 
The storm which prompted the warning has weakened below severe
limits, therefore the warning will be allowed to expire.  However
gusty winds and heavy rain are still possible with this thunderstorm.

LAT...LON 3400 9731 3407 9740 3417 9720 3410 9709
TIME...MOT...LOC 2138Z 288DEG 5KT 3405 9732 

$$

11

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 28, 2:46 PM CDT	Special Weather Statement	OUN	Harmon	29 min
Sep 28, 4:21 PM CDT	Special Weather Statement	OUN	Stephens	24 min
Sep 28, 4:43 PM CDT	Special Weather Statement	OUN	Love	32 min
Sep 28, 4:45 PM CDT	Special Weather Statement	OUN	Jefferson	30 min
Sep 28, 4:54 PM CDT	Areal Flood Advisory	OUN	Carter, Love	3 hr
Sep 28, 5:07 PM CDT	Special Weather Statement	OUN	Love	23 min
Sep 28, 5:18 PM CDT	Special Weather Statement	OUN	Jefferson	27 min
Sep 28, 5:32 PM CDT	Special Weather Statement	OUN	Love	28 min
Sep 28, 5:34 PM CDT	Special Weather Statement	OUN	Comanche	26 min
Sep 28, 5:59 PM CDT	Special Weather Statement	OUN	Tillman	31 min
Sep 28, 6:01 PM CDT	Special Weather Statement	OUN	Love	29 min
Sep 28, 6:14 PM CDT	Special Weather Statement	OUN	Love	46 min
Sep 28, 6:32 PM CDT	Special Weather Statement	OUN	Tillman	28 min
Sep 28, 6:35 PM CDT	Areal Flood Advisory	OUN	Jefferson, Love	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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.