Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 1, NWS Shreveport, LA

January 25, 2021McCurtain County, Oklahoma; Red River County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at Jan 25, 2021, 7:22 AM CST for McCurtain County, Oklahoma; Red River County, Texas. It was in force for 38 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jan 25, 2021, 7:22 AM CST (13:22 UTC)
Expired: Jan 25, 2021, 8:00 AM CST
In force: 38 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties McCurtain County, OK, Red River County, TX

The radar

The Western Arkansas radar (KSRX), 172 km from the middle of the area, began a volume at 13:24 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.

What was reported inside it

Time	Report	Where	Remark
Jan 25, 7:48 AM CST	TSTM WND DMG	3 E Idabel, OK	THUNDERSTORM WINDS RIPPED OFF THE ROOF OF A PORCH AT A HOME ON OPAL VALLEY ROAD ABOUT 3 MILES EAST OF IDABEL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 1.4 hours before the alert went out and 176 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: 964 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 548 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 424 m²/s²
0-3 km storm-relative helicity: 543 m²/s²
Significant tornado parameter: 2.9
Supercell composite: 8.7

Open this sounding in Storm Lab

The text

As transmitted.

274 
WUUS54 KSHV 251322
SVRSHV
OKC089-TXC387-251400-
/O.NEW.KSHV.SV.W.0001.210125T1322Z-210125T1400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
722 AM CST Mon Jan 25 2021

The National Weather Service in Shreveport has issued a

* Severe Thunderstorm Warning for...
  Southern McCurtain County in southeastern Oklahoma...
  Red River County in northeastern Texas...

* Until 800 AM CST.

* At 721 AM CST, severe thunderstorms were located along a line
  extending from 7 miles northeast of Manchester to near Bagwell to
  near Deport to near Bogata to 7 miles northwest of Hagansport,
  moving northeast at 60 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...
  Clarksville, Idabel, Broken Bow, Bogata, Bagwell, Manchester,
  Detroit, Annona, Haworth, Garvin, Eagletown, Farmers Hill, Negley,
  Harris, Cuthand, Goodwater, Silver City, English, Holly Creek and
  Johntown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3425 9447 3398 9448 3372 9465 3369 9469
      3370 9474 3364 9475 3347 9495 3338 9531
      3369 9530 3388 9513
TIME...MOT...LOC 1321Z 240DEG 51KT 3387 9503 3372 9516 3365 9520 3355
9528 3348 9528 3342 9534

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

15

1 follow-up statement

856 
WWUS54 KSHV 251358
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
758 AM CST Mon Jan 25 2021

OKC089-TXC387-251407-
/O.EXP.KSHV.SV.W.0001.000000T0000Z-210125T1400Z/
McCurtain OK-Red River TX-
758 AM CST Mon Jan 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN MCCURTAIN AND RED
RIVER COUNTIES WILL EXPIRE AT 800 AM CST...
            
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.  However gusty 
winds in excess of 40 mph are still possible with these 
thunderstorms.

LAT...LON 3425 9447 3398 9448 3372 9465 3369 9469
      3370 9474 3364 9475 3347 9495 3338 9531
      3369 9530 3388 9513
TIME...MOT...LOC 1357Z 261DEG 34KT 3392 9460 3382 9472 3375 9476 3365
9484 3359 9487 3353 9493

$$

15

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 25, 6:34 AM CST	Special Weather Statement	SHV	McCurtain	56 min
Jan 25, 7:48 AM CST	Special Weather Statement	SHV	Franklin, Titus	42 min
Jan 25, 7:56 AM CST	Special Weather Statement	SHV	Camp, Wood	49 min
Jan 25, 8:40 AM CST	Special Weather Statement	SHV	Bowie, Cass, Morris	50 min
Jan 25, 8:44 AM CST	Special Weather Statement	SHV	Camp, Upshur	46 min
Jan 25, 9:27 AM CST	Special Weather Statement	SHV	Cass	48 min
Jan 25, 9:30 AM CST	Special Weather Statement	SHV	Gregg, Harrison, Marion	45 min
Jan 25, 10:14 AM CST	Special Weather Statement	SHV	Harrison	61 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2021 Severe Thunderstorm Warnings in Texas, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.