Alert archive / Arkansas / Tornado Warnings in 2018

Tornado Warning 28, NWS Jackson, MS

April 13, 2018Ashley County, Arkansas

NWS Jackson, MS issued this tornado warning at Apr 13, 2018, 7:49 PM CDT for Ashley County, Arkansas. It was in force for 24 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 13, 2018, 7:49 PM CDT (00:49 UTC)
Expired: Apr 13, 2018, 8:13 PM CDT
In force: 24 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Ashley County, AR

The radar

The Shreveport radar (KSHV), 189 km from the middle of the area, began a volume at 00:49 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, 7:53 PM CDT	TSTM WND DMG	4 S Crossett, AR	TREES WERE DOWN ALONG COUNTY ROAD 3, POSSIBLE TORNADO. REPORT RELAYED VIA SOCIAL MEDIA.

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, 7:22 PM CDT	Tornado Watch	SPC	3 hr

The nearest sounding before it

Shreveport, LA (KBAD), launched 00:00Z, 0.8 hours before the alert went out and 179 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.

982 
WFUS54 KJAN 140049
TORJAN
ARC003-140145-
/O.NEW.KJAN.TO.W.0028.180414T0049Z-180414T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Jackson MS
749 PM CDT FRI APR 13 2018

The National Weather Service in Jackson has issued a

* Tornado Warning for...
  Central Ashley County in southeastern Arkansas...

* Until 845 PM CDT
    
* At 748 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 8 miles east of Huttig, moving northeast at 25 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. 

* This dangerous storm will be near...
  Crossett and West Crossett around 805 PM CDT. 
  North Crossett around 815 PM CDT. 
  Hamburg and Old Milo around 835 PM CDT. 

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 3334 9188 3324 9159 3301 9188 3301 9208
      3303 9209 3303 9211 3305 9212 3305 9211
      3306 9212
TIME...MOT...LOC 0048Z 219DEG 23KT 3302 9205 

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

$$

19

1 follow-up statement

813 
WWUS54 KJAN 140113
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
813 PM CDT FRI APR 13 2018

ARC003-140123-
/O.CAN.KJAN.TO.W.0028.000000T0000Z-180414T0145Z/
Ashley AR-
813 PM CDT FRI APR 13 2018

...THE TORNADO WARNING FOR CENTRAL ASHLEY COUNTY IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning has been cancelled.  However gusty winds are
still possible with this thunderstorm.

A tornado watch remains in effect until 300 AM CDT for southeastern
Arkansas.

LAT...LON 3334 9188 3324 9159 3301 9188 3301 9208
      3303 9209 3303 9211 3305 9212 3305 9211
      3306 9212
TIME...MOT...LOC 0111Z 219DEG 23KT 3315 9193 

$$

19

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 13, 9:59 PM CDT	Severe Thunderstorm Warning	JAN	Ashley, Chicot	46 min
Apr 13, 10:43 PM CDT	Severe Thunderstorm Warning	JAN	Chicot	36 min
Apr 13, 10:49 PM CDT	Tornado Warning	JAN	Chicot	56 min
Apr 14, 2:32 AM CDT	Severe Thunderstorm Warning	JAN	Ashley	58 min
Apr 14, 3:02 AM CDT	Tornado Warning	JAN	Ashley	28 min
Apr 14, 3:22 AM CDT	Tornado Warning	JAN	Chicot	38 min
Apr 14, 3:30 AM CDT	Tornado Warning	JAN	Chicot	49 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.