Alert archive / Arkansas / Tornado Warnings in 2015

Tornado Warning 101, NWS Shreveport, LA

December 27, 2015Columbia County, Nevada County, Arkansas

NWS Shreveport, LA issued this tornado warning at Dec 27, 2015, 8:57 PM CST for Columbia County, Nevada County, Arkansas. It was in force for 33 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: Dec 27, 2015, 8:57 PM CST (02:57 UTC)
Expired: Dec 27, 2015, 9:30 PM CST
In force: 33 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Columbia County, AR, Nevada County, AR

The radar

The Shreveport radar (KSHV), 136 km from the middle of the area, began a volume at 02:57 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
Dec 27, 8:57 PM CST	TORNADO	3 Sse Willisville, AR	TORNADO SNAPPED AND UPROOTED NUMEROUS TREES. SEVERAL OUTBUILDINGS WERE DESTROYED...AND ONE HOME HAD ROOF DAMAGE.

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
Dec 27, 2:47 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Shreveport, LA (KBAD), launched 00:00Z, 3.0 hours before the alert went out and 129 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.

476 
WFUS54 KSHV 280257
TORSHV
ARC027-099-280330-
/O.NEW.KSHV.TO.W.0101.151228T0257Z-151228T0330Z/

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

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL COLUMBIA COUNTY IN SOUTHWESTERN ARKANSAS...
  SOUTHEASTERN NEVADA COUNTY IN SOUTHWESTERN ARKANSAS...

* UNTIL 930 PM CST
    
* AT 857 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
  WAS LOCATED NEAR WILLISVILLE...OR NEAR WALDO...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...
  MCNEIL...ROSSTON...WILLISVILLE...BLUFF CITY...WHITE OAK LAKE STATE
  PARK...CALE...YOUNG...LAMARTINE...COLLEGE HILL AND WATERLOO.

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 3369 9311 3340 9312 3333 9317 3340 9335
      3373 9319
TIME...MOT...LOC 0257Z 206DEG 38KT 3344 9327 

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, 8:33 PM CST	Tornado Warning	SHV	Columbia	27 min
Dec 27, 8:48 PM CST	Tornado Warning	SHV	Lafayette, Miller	42 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.