Alert archive / Arkansas / Tornado Warnings in 2020

Tornado Warning 28, NWS Tulsa, OK

April 28, 2020Franklin County, Arkansas

NWS Tulsa, OK issued this tornado warning at Apr 28, 2020, 8:40 PM CDT for Franklin County, Arkansas. It was in force for 20 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 28, 2020, 8:40 PM CDT (01:40 UTC)
Expired: Apr 28, 2020, 9:00 PM CDT
In force: 20 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Franklin County, AR

The radar

The Western Arkansas radar (KSRX), 63 km from the middle of the area, began a volume at 01:40 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 28, 8:40 PM CDT	TSTM WND DMG	3 N Watalula, AR	TREE DOWN ACROSS HIGHWAY 23.

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 28, 3:18 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 1.7 hours before the alert went out and 147 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: 1990 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 1071 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

As transmitted.

803 
WFUS54 KTSA 290140
TORTSA
ARC047-290200-
/O.NEW.KTSA.TO.W.0028.200429T0140Z-200429T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Tulsa OK
840 PM CDT Tue Apr 28 2020

The National Weather Service in Tulsa has issued a

* Tornado Warning for...
  Northeastern Franklin County in west central Arkansas...

* Until 900 PM CDT.
    
* At 840 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 5 miles south of Cass, moving east at 40 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.

* Locations in or near the path include...
  Wiederkehr Village...             Cass...
  Barnes...                         Redding...
  Turners Bend...                   Watalula...
  Taft...                           Paradise...

This includes Interstate 40 in Arkansas between mile markers 41 and
42.
 
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 3549 9371 3557 9390 3569 9384 3567 9370
TIME...MOT...LOC 0140Z 287DEG 35KT 3561 9381 

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

$$

1 follow-up statement

400 
WWUS54 KTSA 290154
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
854 PM CDT Tue Apr 28 2020

ARC047-290204-
/O.EXP.KTSA.TO.W.0028.000000T0000Z-200429T0200Z/
Franklin AR-
854 PM CDT Tue Apr 28 2020

...THE TORNADO WARNING FOR NORTHEASTERN FRANKLIN COUNTY WILL EXPIRE
AT 900 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

A Tornado Watch remains in effect until 1100 PM CDT for west central
Arkansas.

LAT...LON 3549 9371 3557 9390 3569 9384 3567 9370
TIME...MOT...LOC 0154Z 287DEG 35KT 3557 9366 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 7:02 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	58 min
Apr 28, 7:37 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll, Crawford, Franklin, Madison, Washington	53 min
Apr 28, 7:57 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Sebastian	63 min
Apr 28, 8:18 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Madison, Sebastian	57 min
Apr 28, 8:29 PM CDT	Special Weather Statement	TSA	Madison	31 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.