Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 588, NWS Norman, OK

December 17, 2021Carter County, Murray County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Dec 17, 2021, 5:27 PM CST for Carter County, Murray 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: Dec 17, 2021, 5:27 PM CST (23:27 UTC)
Expired: Dec 17, 2021, 6:15 PM CST
In force: 48 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Carter County, OK, Murray County, OK

The radar

The Norman radar (KTLX), 118 km from the middle of the area, began a volume at 23:30 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, 11.5 hours before the alert went out and 160 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: 808 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 575 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 300 m²/s²
0-3 km storm-relative helicity: 300 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.3

Open this sounding in Storm Lab

The text

As transmitted.

951 
WUUS54 KOUN 172327
SVROUN
OKC019-099-180015-
/O.NEW.KOUN.SV.W.0588.211217T2327Z-211218T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
527 PM CST Fri Dec 17 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Central Carter County in southern Oklahoma...
  Southwestern Murray County in southern Oklahoma...

* Until 615 PM CST.

* At 527 PM CST, a severe thunderstorm was located 5 miles east of
  Healdton, moving east at 30 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 impacted include...
  Ardmore, Lone Grove, Healdton, Wilson, Springer, Dougherty, Gene
  Autry, Graham, Milo, Turner Falls and Lake Of The Arbuckles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3415 9746 3431 9752 3449 9705 3426 9694
TIME...MOT...LOC 2327Z 249DEG 25KT 3425 9740 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Zwink

2 follow-up statements

234 
WWUS54 KOUN 172349
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
549 PM CST Fri Dec 17 2021

OKC019-099-180015-
/O.CON.KOUN.SV.W.0588.000000T0000Z-211218T0015Z/
Carter OK-Murray OK-
549 PM CST Fri Dec 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CST
FOR CENTRAL CARTER AND SOUTHWESTERN MURRAY COUNTIES...

At 549 PM CST, a severe thunderstorm was located 5 miles west of
Springer, moving east at 30 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 impacted include...
Ardmore, Lone Grove, Springer, Dougherty, Gene Autry, Milo, Turner
Falls and Lake Of The Arbuckles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3419 9730 3435 9740 3449 9705 3426 9694
TIME...MOT...LOC 2349Z 249DEG 25KT 3431 9723 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Zwink

361 
WWUS54 KOUN 180006
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
606 PM CST Fri Dec 17 2021

OKC019-099-180016-
/O.EXP.KOUN.SV.W.0588.000000T0000Z-211218T0015Z/
Carter OK-Murray OK-
606 PM CST Fri Dec 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CARTER AND
SOUTHWESTERN MURRAY COUNTIES WILL EXPIRE AT 615 PM CST...
                 
The storm which prompted the warning has weakened below severe
limits, therefore the warning will be allowed to expire.  However
small hail, gusty winds and heavy rain are still possible with this
thunderstorm.

LAT...LON 3419 9730 3435 9740 3449 9705 3426 9694
TIME...MOT...LOC 0006Z 249DEG 25KT 3434 9713 

$$

Zwink

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 17, 7:42 AM CST	Special Weather Statement	OUN	Garvin	33 min
Dec 17, 2:47 PM CST	Special Weather Statement	OUN	Garvin	28 min
Dec 17, 3:06 PM CST	Special Weather Statement	OUN	Seminole	24 min
Dec 17, 3:16 PM CST	Special Weather Statement	OUN	Pontotoc	29 min
Dec 17, 3:18 PM CST	Severe Thunderstorm Warning	OUN	Cotton, Jefferson	42 min
Dec 17, 3:28 PM CST	Severe Thunderstorm Warning	OUN	Hughes, Pontotoc, Seminole	47 min
Dec 17, 3:58 PM CST	Severe Thunderstorm Warning	OUN	Jefferson, Stephens	47 min
Dec 17, 4:10 PM CST	Severe Thunderstorm Warning	OUN	Hughes, Pontotoc, Seminole	50 min
Dec 17, 4:22 PM CST	Severe Thunderstorm Warning	OUN	Jefferson, Stephens	23 min
Dec 17, 4:31 PM CST	Special Weather Statement	OUN	Murray	29 min
Dec 17, 4:41 PM CST	Severe Thunderstorm Warning	OUN	Carter, Jefferson	49 min
Dec 17, 5:02 PM CST	Special Weather Statement	OUN	Hughes	28 min
Dec 17, 5:04 PM CST	Special Weather Statement	OUN	Murray	26 min
Dec 17, 5:14 PM CST	Severe Thunderstorm Warning	OUN	Garvin, Murray, Pontotoc	46 min
Dec 17, 5:22 PM CST	Special Weather Statement	OUN	McClain	23 min
Dec 17, 5:34 PM CST	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, McClain	41 min
Dec 17, 5:37 PM CST	Special Weather Statement	OUN	Jefferson	23 min
Dec 17, 5:42 PM CST	Special Weather Statement	OUN	Hughes	33 min
Dec 17, 5:57 PM CST	Severe Thunderstorm Warning	OUN	Coal, Hughes, Pontotoc, Seminole	48 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.