Alert archive / Arkansas / Tornado Warnings in 2018

Tornado Warning 8, NWS Tulsa, OK

April 13, 2018Carroll County, Arkansas

NWS Tulsa, OK issued this tornado warning at Apr 13, 2018, 5:29 PM CDT for Carroll County, Arkansas. It was in force for 15 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: Apr 13, 2018, 5:29 PM CDT (22:29 UTC)
Expired: Apr 13, 2018, 5:44 PM CDT
In force: 15 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Carroll County, AR

The radar

The Springfield radar (KSGF), 97 km from the middle of the area, began a volume at 22:30 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
Apr 13, 1:20 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 10.5 hours before the alert went out and 71 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: 1715 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 572 m²/s²
0-3 km storm-relative helicity: 541 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

922 
WFUS54 KTSA 132229
TORTSA
ARC015-132300-
/O.NEW.KTSA.TO.W.0008.180413T2229Z-180413T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Tulsa OK
529 PM CDT FRI APR 13 2018

The National Weather Service in Tulsa has issued a

* Tornado Warning for...
  Northeastern Carroll County in northwestern Arkansas...

* Until 600 PM CDT
    
* At 528 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Green Forest, moving northeast at 55 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 in or near the path include...
  Green Forest...                   Rule...
  Coin...                           Denver...
  Connor...                         

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 3623 9342 3632 9350 3650 9331 3650 9330
      3648 9329 3629 9330
TIME...MOT...LOC 2228Z 228DEG 46KT 3632 9340 

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

$$

69

1 follow-up statement

826 
WWUS54 KTSA 132244
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
544 PM CDT FRI APR 13 2018

ARC015-132254-
/O.CAN.KTSA.TO.W.0008.000000T0000Z-180413T2300Z/
Carroll AR-
544 PM CDT FRI APR 13 2018

...THE TORNADO WARNING FOR NORTHEASTERN CARROLL 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 1000 PM CDT for northwestern
Arkansas.

LAT...LON 3623 9342 3632 9350 3650 9331 3650 9330
      3648 9329 3629 9330
TIME...MOT...LOC 2243Z 228DEG 46KT 3646 9321 

$$

69

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 13, 3:14 PM CDT	Special Weather Statement	TSA	Benton	46 min
Apr 13, 3:28 PM CDT	Special Weather Statement	TSA	Crawford	47 min
Apr 13, 3:40 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Sebastian	50 min
Apr 13, 3:50 PM CDT	Tornado Warning	TSA	Crawford, Franklin, Sebastian	25 min
Apr 13, 4:10 PM CDT	Tornado Warning	TSA	Crawford, Franklin, Madison, Washington	50 min
Apr 13, 4:57 PM CDT	Severe Thunderstorm Warning	TSA	Carroll, Madison	48 min
Apr 13, 5:02 PM CDT	Tornado Warning	TSA	Carroll, Madison	28 min
Apr 13, 5:06 PM CDT	Special Weather Statement	TSA	Sebastian	39 min
Apr 13, 5:19 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Sebastian	41 min
Apr 13, 5:48 PM CDT	Tornado Warning	TSA	Franklin, Sebastian	42 min
Apr 13, 6:02 PM CDT	Severe Thunderstorm Warning	TSA	Franklin, Sebastian	28 min
Apr 13, 6:27 PM CDT	Severe Thunderstorm Warning	TSA	Franklin, Sebastian	34 min

Nearby

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