Alert archive / Oklahoma / Tornado Warnings in 2020

Tornado Warning 39, NWS Shreveport, LA

April 22, 2020McCurtain County, Oklahoma; Red River County, Texas

NWS Shreveport, LA issued this tornado warning at Apr 22, 2020, 7:01 PM CDT for McCurtain County, Oklahoma; Red River County, Texas. It was in force for 44 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: Apr 22, 2020, 7:01 PM CDT (00:01 UTC)
Expired: Apr 22, 2020, 7:45 PM CDT
In force: 44 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Observed
Hail: 0.75 in

Counties McCurtain County, OK, Red River County, TX

The radar

The Western Arkansas radar (KSRX), 171 km from the middle of the area, began a volume at 00:01 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
Apr 22, 7:04 PM CDT	TORNADO	13 Nnw Detroit, TX	A STORM SURVEY INDICATED THAT THE EF-2 TORNADO IN LAMAR COUNTY CROSSED INTO RED RIVER COUNTY AND DID EF-0 DAMAGE, UPROOTING A COUPLE OF TREES BEFORE QUICKLY LIFTING.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 22, 7:00 PM CDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.0 hours before the alert went out and 229 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: 3396 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -74 m²/s²
0-3 km storm-relative helicity: -15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted.

435 
WFUS54 KSHV 230001
TORSHV
OKC089-TXC387-230045-
/O.NEW.KSHV.TO.W.0039.200423T0001Z-200423T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Shreveport LA
701 PM CDT Wed Apr 22 2020

The National Weather Service in Shreveport has issued a

* Tornado Warning for...
  Southwestern McCurtain County in southeastern Oklahoma...
  Northwestern Red River County in northeastern Texas...

* Until 745 PM CDT.

* At 700 PM CDT, a confirmed tornado was located 10 miles south of
  Sawyer, or 12 miles southeast of Hugo, moving east at 40 mph. 

  HAZARD...Damaging tornado.

  SOURCE...Weather spotters confirmed tornado.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* The tornado will be near...
  Manchester around 720 PM CDT.
  Idabel around 745 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Farmers Hill, Millerton, Woodland, Redland, Silver City, Kanawha,
Holly Creek, Garvin, Valliant and Kiomatia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 3388 9531 3388 9528 3391 9528 3391 9527
      3389 9527 3389 9525 3393 9525 3396 9523
      3394 9516 3402 9516 3406 9476 3377 9473
      3375 9531
TIME...MOT...LOC 0000Z 267DEG 37KT 3386 9538 

TORNADO...OBSERVED
HAIL...<.75IN

$$

44

1 follow-up statement

892 
WWUS54 KSHV 230035
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
735 PM CDT Wed Apr 22 2020

OKC089-TXC387-230045-
/O.CON.KSHV.TO.W.0039.000000T0000Z-200423T0045Z/
McCurtain OK-Red River TX-
735 PM CDT Wed Apr 22 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
SOUTHWESTERN MCCURTAIN AND NORTHWESTERN RED RIVER COUNTIES...
    
At 734 PM CDT, a severe thunderstorm capable of producing a tornado
was located 7 miles west of Idabel, or 19 miles north of Clarksville,
moving east at 45 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Idabel around 745 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Farmers Hill, Millerton, Woodland, Redland, Silver City, Kanawha,
Holly Creek, Garvin, Valliant and Kiomatia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3388 9531 3388 9528 3391 9528 3391 9527
      3389 9527 3389 9525 3393 9525 3396 9523
      3394 9516 3402 9516 3406 9476 3377 9473
      3375 9531
TIME...MOT...LOC 0034Z 267DEG 37KT 3388 9495 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

44

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 7:41 PM CDT	Tornado Warning	SHV	McCurtain	21 min
Apr 22, 8:08 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	37 min
Apr 22, 8:12 PM CDT	Tornado Warning	SHV	McCurtain	23 min
Apr 22, 8:25 PM CDT	Tornado Warning	SHV	McCurtain	23 min
Apr 22, 8:41 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	49 min
Apr 22, 9:22 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	38 min
Apr 22, 8:47 PM CDT	Special Weather Statement	SHV	Shelby	43 min
Apr 22, 9:06 PM CDT	Severe Thunderstorm Warning	SHV	Nacogdoches, Sabine, San Augustine, Shelby	39 min
Apr 22, 9:12 PM CDT	Flash Flood Warning	SHV	Nacogdoches, Sabine, San Augustine, Shelby	109 min
Apr 22, 10:35 PM CDT	Special Weather Statement	SHV	Cass, Marion	40 min

Nearby

Tornado Warnings in Oklahoma, 2020 Tornado Warnings in Texas, 2020 Every tornado warning in 2020 Tornadoes in 2020

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.