Alert archive / Arkansas / Tornado Warnings in 2015

Tornado Warning 99, NWS Shreveport, LA

December 27, 2015Columbia County, Arkansas

NWS Shreveport, LA issued this tornado warning at Dec 27, 2015, 8:33 PM CST for Columbia County, Arkansas. It was in force for 27 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: Dec 27, 2015, 8:33 PM CST (02:33 UTC)
Expired: Dec 27, 2015, 9:00 PM CST
In force: 27 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Columbia County, AR

The radar

The Shreveport radar (KSHV), 103 km from the middle of the area, began a volume at 02:35 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
Dec 27, 2:47 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Shreveport, LA (KBAD), launched 00:00Z, 2.6 hours before the alert went out and 96 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: 692 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1047 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 360 m²/s²
0-3 km storm-relative helicity: 462 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 9.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

820 
WFUS54 KSHV 280233
TORSHV
ARC027-280300-
/O.NEW.KSHV.TO.W.0099.151228T0233Z-151228T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
833 PM CST SUN DEC 27 2015

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL COLUMBIA COUNTY IN SOUTHWESTERN ARKANSAS...

* UNTIL 900 PM CST
    
* AT 833 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
  WAS LOCATED OVER MACEDONIA...OR 9 MILES SOUTHWEST OF MAGNOLIA...
  MOVING NORTHEAST AT 45 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 IMPACTED INCLUDE...
  MAGNOLIA...WALDO...MCNEIL...MACEDONIA...SMITHLAND...BUSSEY...MOUNT
  VERNON...HORSEHEAD...LAMARTINE...LAUGHLIN AND COLLEGE HILL.

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 3306 9329 3313 9348 3345 9333 3344 9331
      3336 9306
TIME...MOT...LOC 0233Z 206DEG 38KT 3318 9335 

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

$$

19

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 27, 6:07 PM CST	Flash Flood Warning	SHV	Hempstead, Miller	6 hr
Dec 27, 6:15 PM CST	Special Weather Statement	SHV	Miller	45 min
Dec 27, 6:46 PM CST	Flash Flood Warning	SHV	Lafayette, Nevada	6 hr
Dec 27, 6:47 PM CST	Tornado Warning	SHV	Lafayette, Miller	28 min
Dec 27, 7:14 PM CST	Tornado Warning	SHV	Hempstead, Lafayette, Miller, Nevada	31 min
Dec 27, 7:32 PM CST	Tornado Warning	SHV	Lafayette	43 min
Dec 27, 8:48 PM CST	Tornado Warning	SHV	Lafayette, Miller	42 min
Dec 27, 8:57 PM CST	Tornado Warning	SHV	Columbia, Nevada	33 min
Dec 27, 8:58 PM CST	River Flood Warning	SHV	Hempstead, Lafayette, Little River, Miller	64 hr
Dec 27, 9:46 PM CST	Flash Flood Warning	SHV	Columbia, Union	6 hr
Dec 27, 10:57 PM CST	Severe Thunderstorm Warning	SHV	Columbia, Lafayette	23 min
Dec 27, 11:42 PM CST	Severe Thunderstorm Warning	SHV	Columbia, Union	78 min
Dec 27, 11:52 PM CST	Flash Flood Warning	SHV	Howard, Little River, Sevier	113 min
Dec 27, 11:58 PM CST	Flash Flood Warning	SHV	Hempstead, Miller	3 hr
Dec 28, 12:19 AM CST	Lake Wind Advisory	SHV	Columbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more	15 hr
Dec 28, 12:29 AM CST	Severe Thunderstorm Warning	SHV	Union	61 min
Dec 28, 12:43 AM CST	Severe Thunderstorm Warning	SHV	Union	32 min
Dec 28, 1:30 AM CST	Severe Thunderstorm Warning	SHV	Union	30 min

Nearby

Tornado Warnings in Arkansas, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.