Alert archive / Arkansas / Tornado Warnings in 2018

Tornado Warning 63, NWS Shreveport, LA

April 13, 2018McCurtain County, Oklahoma; Howard County, Little River County, Sevier County, Arkansas; Bowie County, Texas

NWS Shreveport, LA issued this tornado warning at Apr 13, 2018, 7:51 PM CDT for McCurtain County, Oklahoma; Howard County, Little River County, Sevier County, Arkansas; Bowie County, Texas. It was in force for 25 min. 2 reports 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 13, 2018, 7:51 PM CDT (00:51 UTC)
Expired: Apr 13, 2018, 8:16 PM CDT
In force: 25 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Howard County, AR, Little River County, AR, Sevier County, AR, McCurtain County, OK, Bowie County, TX

The radar

The Shreveport radar (KSHV), 153 km from the middle of the area, began a volume at 00:55 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 13, 7:52 PM CDT	TSTM WND DMG	Lockesburg, AR	TREES DOWN COUNTY WIDE AND IN THE LOCKSBURG AREA.
Apr 13, 7:55 PM CDT	TSTM WND DMG	2 W Winthrop, AR	TREE DOWN ACROSS HWY 41 JUST WEST OF WINTHROP.

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 13, 1:50 PM CDT	Tornado Watch PDS	SPC	8 hr

The nearest sounding before it

Shreveport, LA (KBAD), launched 00:00Z, 0.9 hours before the alert went out and 153 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: 1539 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 1018 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 238 m²/s²
0-3 km storm-relative helicity: 235 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 13.1

Open this sounding in Storm Lab

The text

As transmitted.

114 
WFUS54 KSHV 140051
TORSHV
ARC061-081-133-OKC089-TXC037-140130-
/O.NEW.KSHV.TO.W.0063.180414T0051Z-180414T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Shreveport LA
751 PM CDT FRI APR 13 2018

The National Weather Service in Shreveport has issued a

* Tornado Warning for...
  Northwestern Little River County in southwestern Arkansas...
  Southern Sevier County in southwestern Arkansas...
  Southeastern Howard County in southwestern Arkansas...
  Southeastern McCurtain County in southeastern Oklahoma...
  North central Bowie County in northeastern Texas...

* Until 830 PM CDT
    
* At 750 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Foreman, moving northeast at 50 mph.

  HAZARD...Tornado and quarter size hail. 

  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. 

* Locations impacted include...
  Mineral Springs, Foreman, Lockesburg, Wilton, Tollette, Winthrop,
  Ben Lomond, Saratoga, Arkinda, Oak Grove, Silver Ridge, Central,
  Wallace, Tom, Arden, Provo, Browntown and Bellview.

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 3360 9457 3375 9463 3409 9401 3379 9384
TIME...MOT...LOC 0050Z 238DEG 43KT 3370 9448 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

09

2 follow-up statements

502 
WWUS54 KSHV 140101
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
801 PM CDT FRI APR 13 2018

OKC089-TXC037-140110-
/O.CAN.KSHV.TO.W.0063.000000T0000Z-180414T0130Z/
McCurtain OK-Bowie TX-
801 PM CDT FRI APR 13 2018

...THE TORNADO WARNING FOR SOUTHEASTERN MCCURTAIN AND NORTH CENTRAL
BOWIE COUNTIES IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
McCurtain and Bowie Counties. Therefore, the warning for 
McCurtain and Bowie Counties has been cancelled.

A tornado watch remains in effect until 1000 PM CDT for southwestern
Arkansas.

LAT...LON 3368 9446 3383 9448 3409 9401 3379 9384
      3374 9402
TIME...MOT...LOC 0100Z 245DEG 26KT 3375 9439 

$$

ARC061-081-133-140130-
/O.CON.KSHV.TO.W.0063.000000T0000Z-180414T0130Z/
Little River AR-Sevier AR-Howard AR-
801 PM CDT FRI APR 13 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR
NORTHWESTERN LITTLE RIVER...SOUTHERN SEVIER AND SOUTHEASTERN HOWARD
COUNTIES...
    
At 800 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Foreman, moving northeast at 30 mph.

HAZARD...Tornado and half dollar size hail. 

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. 

Locations impacted include...
Mineral Springs, Foreman, Lockesburg, Wilton, Tollette, Winthrop, Ben
Lomond, Saratoga, Arkinda, Oak Grove, Silver Ridge, Central, Provo,
Browntown and Bellview.

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3368 9446 3383 9448 3409 9401 3379 9384
      3374 9402
TIME...MOT...LOC 0100Z 245DEG 26KT 3375 9439 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

09

066 
WWUS54 KSHV 140116
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
816 PM CDT FRI APR 13 2018

ARC061-081-133-140126-
/O.CAN.KSHV.TO.W.0063.000000T0000Z-180414T0130Z/
Little River AR-Sevier AR-Howard AR-
816 PM CDT FRI APR 13 2018

...THE TORNADO WARNING FOR NORTHERN LITTLE RIVER...SOUTHERN SEVIER
AND SOUTHEASTERN HOWARD COUNTIES IS CANCELLED...
    
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and a
Severe Thunderstorm Warning remains in effect for the area.

A tornado watch remains in effect until 1000 PM CDT for southwestern
Arkansas.

LAT...LON 3368 9446 3383 9448 3409 9401 3379 9384
      3374 9402
TIME...MOT...LOC 0114Z 238DEG 43KT 3385 9419 

$$

09

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 8:53 PM CDT	Severe Thunderstorm Warning	SHV	McCurtain	29 min
Apr 14, 4:24 AM CDT	Lake Wind Advisory	SHV	McCurtain	15 hr
Apr 13, 8:15 PM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Howard, Little River, Sevier	45 min
Apr 13, 9:27 PM CDT	Special Weather Statement	SHV	Howard, Sevier	48 min
Apr 13, 10:19 PM CDT	Special Weather Statement	SHV	Hempstead, Howard, Little River, Sevier	41 min
Apr 13, 11:30 PM CDT	Severe Thunderstorm Warning	SHV	Miller	45 min
Apr 13, 11:35 PM CDT	Special Weather Statement	SHV	Little River, Sevier	40 min
Apr 14, 12:15 AM CDT	Severe Thunderstorm Warning	SHV	Columbia, Lafayette, Miller	45 min
Apr 14, 12:46 AM CDT	Tornado Warning	SHV	Columbia	29 min
Apr 14, 12:59 AM CDT	Severe Thunderstorm Warning	SHV	Columbia, Union	46 min
Apr 14, 1:11 AM CDT	Tornado Warning	SHV	Columbia, Union	34 min
Apr 14, 1:13 AM CDT	Special Weather Statement	SHV	Union	17 min
Apr 14, 1:28 AM CDT	Tornado Warning	SHV	Columbia, Union	32 min
Apr 14, 1:30 AM CDT	Tornado Warning	SHV	Columbia, Union	33 min
Apr 14, 1:45 AM CDT	Severe Thunderstorm Warning	SHV	Union	75 min
Apr 14, 2:01 AM CDT	Tornado Warning	SHV	Union	29 min
Apr 13, 9:47 PM CDT	Special Weather Statement	SHV	Wood	13 min
Apr 13, 10:00 PM CDT	Severe Thunderstorm Warning	SHV	Angelina, Camp, Cherokee, Franklin, Gregg, Nacogdoches and 4 more	60 min
Apr 13, 10:57 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Camp, Cass, Franklin, Gregg, Harrison and 9 more	33 min
Apr 13, 11:10 PM CDT	Tornado Warning	SHV	Cass, Gregg, Harrison, Marion, Upshur	23 min
Apr 13, 11:54 PM CDT	Tornado Warning	SHV	Harrison, Panola	21 min
Apr 13, 11:57 PM CDT	Special Weather Statement	SHV	Angelina, Nacogdoches, San Augustine, Shelby	48 min
Apr 14, 1:10 AM CDT	Special Weather Statement	SHV	Sabine, San Augustine	65 min

Nearby

Tornado Warnings in Arkansas, 2018 Tornado Warnings in Oklahoma, 2018 Tornado Warnings in Texas, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.