Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 147, NWS Shreveport, LA

May 10, 2021McCurtain County, Oklahoma; Sevier County, Arkansas

NWS Shreveport, LA issued this severe thunderstorm warning at May 10, 2021, 9:56 PM CDT for McCurtain County, Oklahoma; Sevier County, Arkansas. It was in force for 49 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: May 10, 2021, 9:56 PM CDT (02:56 UTC)
Expired: May 10, 2021, 10:45 PM CDT
In force: 49 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Sevier County, AR, McCurtain County, OK

The radar

The Western Arkansas radar (KSRX), 124 km from the middle of the area, began a volume at 02:58 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

Shreveport, LA (KSHV), launched 00:00Z, 2.9 hours before the alert went out and 206 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 474 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 173 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

093 
WUUS54 KSHV 110256
SVRSHV
ARC133-OKC089-110345-
/O.NEW.KSHV.SV.W.0147.210511T0256Z-210511T0345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
956 PM CDT Mon May 10 2021

The National Weather Service in Shreveport has issued a

* Severe Thunderstorm Warning for...
  Northwestern Sevier County in southwestern Arkansas...
  Central McCurtain County in southeastern Oklahoma...

* Until 1045 PM CDT.

* At 956 PM CDT, a severe thunderstorm was located 10 miles west of
  Broken Bow, or 32 miles west of De Queen, moving northeast at 50
  mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Broken Bow, Wright City, Garvin, Holly Creek, Glover, Hochatown,
  Oak Hill and Golden.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3430 9447 3419 9447 3419 9441 3409 9435
      3393 9496 3414 9505 3441 9453
TIME...MOT...LOC 0256Z 242DEG 42KT 3407 9491 

HAIL...1.00IN
WIND...<50MPH
 
$$

33

1 follow-up statement

992 
WWUS54 KSHV 110321
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
1021 PM CDT Mon May 10 2021

ARC133-OKC089-110345-
/O.CON.KSHV.SV.W.0147.000000T0000Z-210511T0345Z/
Sevier AR-McCurtain OK-
1021 PM CDT Mon May 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT
FOR NORTHWESTERN SEVIER AND EAST CENTRAL MCCURTAIN COUNTIES...

At 1021 PM CDT, a severe thunderstorm was located 14 miles northeast
of Broken Bow, or 18 miles northwest of De Queen, moving northeast at
50 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Hochatown and Eagletown. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3430 9447 3419 9447 3419 9441 3409 9435
      3400 9468 3419 9474 3432 9452
TIME...MOT...LOC 0321Z 242DEG 42KT 3421 9460 

HAIL...1.00IN
WIND...<50MPH
 
$$

33

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 10, 8:59 PM CDT	Special Weather Statement	SHV	McCurtain	46 min
May 10, 9:12 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	38 min
May 10, 9:29 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	46 min
May 11, 1:28 PM CDT	Special Weather Statement	SHV	McCurtain	47 min
May 10, 10:11 PM CDT	Special Weather Statement	SHV	Howard	34 min
May 11, 2:04 AM CDT	Flash Flood Watch	SHV	Columbia, Lafayette, Miller, Union	24 hr
May 11, 3:37 AM CDT	Special Weather Statement	SHV	Little River	53 min
May 11, 12:04 PM CDT	Special Weather Statement	SHV	Howard	26 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2021 Severe Thunderstorm Warnings in Arkansas, 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.