Alert archive / Arkansas / Tornado Warnings in 2020

Tornado Warning 4, NWS Shreveport, LA

January 10, 2020Howard County, Sevier County, Arkansas

NWS Shreveport, LA issued this tornado warning at Jan 10, 2020, 7:59 PM CST for Howard County, Sevier County, Arkansas. It was in force for 18 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: Jan 10, 2020, 7:59 PM CST (01:59 UTC)
Expired: Jan 10, 2020, 8:17 PM CST
In force: 18 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Howard County, AR, Sevier County, AR

The radar

The Western Arkansas radar (KSRX), 118 km from the middle of the area, began a volume at 02:03 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jan 10, 5:34 PM CST	Tornado Watch	SPC	11 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 2.0 hours before the alert went out and 200 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: 703 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 813 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 379 m²/s²
0-3 km storm-relative helicity: 620 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 6.1

Open this sounding in Storm Lab

The text

As transmitted.

318 
WFUS54 KSHV 110159
TORSHV
ARC061-133-110230-
/O.NEW.KSHV.TO.W.0004.200111T0159Z-200111T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Shreveport LA
759 PM CST Fri Jan 10 2020

The National Weather Service in Shreveport has issued a

* Tornado Warning for...
  North central Sevier County in southwestern Arkansas...
  Northwestern Howard County in southwestern Arkansas...

* Until 830 PM CST.
    
* At 759 PM CST, a severe thunderstorm capable of producing a tornado
  was located near Gillham, or 9 miles northeast of De Queen, moving
  northeast at 55 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...
  Umpire around 810 PM CST.
  Athens around 815 PM CST.

Other locations impacted by this tornadic thunderstorm include Burg.

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 3435 9397 3404 9417 3412 9437 3419 9434
      3419 9424 3427 9424 3427 9426 3436 9425
TIME...MOT...LOC 0159Z 204DEG 48KT 3415 9424 

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

$$

44

2 follow-up statements

934 
WWUS54 KSHV 110212
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
812 PM CST Fri Jan 10 2020

ARC133-110221-
/O.CAN.KSHV.TO.W.0004.000000T0000Z-200111T0230Z/
Sevier AR-
812 PM CST Fri Jan 10 2020

...THE TORNADO WARNING FOR NORTH CENTRAL SEVIER COUNTY IS
CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 200 AM CST for southwestern
Arkansas.

LAT...LON 3435 9397 3419 9407 3419 9424 3427 9424
      3427 9425 3436 9425
TIME...MOT...LOC 0211Z 204DEG 48KT 3430 9416 

$$

ARC061-110230-
/O.CON.KSHV.TO.W.0004.000000T0000Z-200111T0230Z/
Howard AR-
812 PM CST Fri Jan 10 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CST FOR
NORTHWESTERN HOWARD COUNTY...
    
At 811 PM CST, a severe thunderstorm capable of producing a tornado
was located near Hartley, or near Umpire, moving northeast at 55 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...
  Athens around 815 PM CST.

Other locations impacted by this tornadic thunderstorm include Burg.

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 3435 9397 3419 9407 3419 9424 3427 9424
      3427 9425 3436 9425
TIME...MOT...LOC 0211Z 204DEG 48KT 3430 9416 

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

$$

44

479 
WWUS54 KSHV 110217
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
817 PM CST Fri Jan 10 2020

ARC061-110227-
/O.CAN.KSHV.TO.W.0004.000000T0000Z-200111T0230Z/
Howard AR-
817 PM CST Fri Jan 10 2020

...THE TORNADO WARNING FOR NORTHWESTERN HOWARD COUNTY IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 200 AM CST for southwestern
Arkansas.

LAT...LON 3435 9397 3419 9407 3419 9424 3427 9424
      3427 9425 3436 9425
TIME...MOT...LOC 0213Z 204DEG 48KT 3438 9412 

$$

44

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 10, 7:25 PM CST	Tornado Warning	SHV	Howard	14 min
Jan 10, 7:36 PM CST	Special Weather Statement	SHV	Sevier	39 min
Jan 10, 8:32 PM CST	Flash Flood Warning	SHV	Sevier	3 hr
Jan 10, 10:03 PM CST	Special Weather Statement	SHV	Hempstead, Howard, Little River	57 min
Jan 10, 10:26 PM CST	Flash Flood Warning	SHV	Hempstead, Howard, Little River, Sevier	3 hr
Jan 10, 11:05 PM CST	Special Weather Statement	SHV	Columbia, Hempstead, Lafayette, Miller, Nevada	55 min
Jan 11, 12:40 AM CST	Severe Thunderstorm Warning	SHV	Lafayette, Miller	65 min
Jan 11, 1:30 AM CST	Severe Thunderstorm Warning	SHV	Columbia, Union	60 min
Jan 11, 2:16 AM CST	Severe Thunderstorm Warning	SHV	Union	59 min
Jan 11, 5:15 AM CST	River Flood Warning	SHV	Columbia	11 days

Nearby

Tornado Warnings in Arkansas, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.