Alert archive / Arkansas / Tornado Warnings in 2017

Tornado Warning 17, NWS Shreveport, LA

January 21, 2017Union County, Arkansas; Union Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Jan 21, 2017, 7:13 PM CST for Union County, Arkansas; Union Parish, Louisiana. It was in force for 47 min. 3 reports 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: Jan 21, 2017, 7:13 PM CST (01:13 UTC)
Expired: Jan 21, 2017, 8:00 PM CST
In force: 47 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

Counties Union County, AR, Union Parish, LA

The radar

The Shreveport radar (KSHV), 154 km from the middle of the area, began a volume at 01:12 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
Jan 21, 7:15 PM CST	NON-TSTM WND DMG	5 Sw El Dorado, AR	CARPORT COLLAPSED ON A CAR IN PARKERS CHAPEL.
Jan 21, 7:25 PM CST	HAIL 1	El Dorado, AR	DIME TO QUARTER SIZE HAIL IN EL DORADO.
Jan 21, 7:35 PM CST	TSTM WND DMG	8 Sse Calion, AR	A HOUSE IN LAWSON LOST THE ROOF AND THE SIDE OF THE HOME CAVED IN.

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
Jan 21, 3:41 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Shreveport, LA (KBAD), launched 00:00Z, 1.2 hours before the alert went out and 145 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: 1144 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 813 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 285 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 9.0

Open this sounding in Storm Lab

The text

As transmitted.

071 
WFUS54 KSHV 220113
TORSHV
ARC139-LAC111-220200-
/O.NEW.KSHV.TO.W.0017.170122T0113Z-170122T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Shreveport LA
713 PM CST SAT JAN 21 2017

The National Weather Service in Shreveport has issued a

* Tornado Warning for...
  Central Union County in south central Arkansas...
  Northwestern Union Parish in north central Louisiana...

* Until 800 PM CST

* At 713 PM CST, a severe thunderstorm capable of producing a tornado
  was located over Wesson, or near Junction City, moving northeast at
  30 mph.

  HAZARD...Tornado and half dollar size hail. 

  SOURCE...Weather spotters reported funnel cloud. 

  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...
  El Dorado, Norphlet, Junction City, Calion, Wesson, Lawson, Newell,
  Pigeon Hill and Catesville.

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 3300 9270 3312 9287 3337 9265 3336 9260
      3337 9259 3337 9255 3333 9252 3332 9252
      3333 9250 3332 9249 3333 9248 3332 9246
      3329 9247 3327 9244 3328 9238 3330 9236
      3330 9235 3329 9236 3328 9235
TIME...MOT...LOC 0113Z 220DEG 28KT 3311 9272 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

19

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 21, 6:04 PM CST	Tornado Warning	SHV	Columbia, Union	41 min
Jan 21, 6:04 PM CST	Tornado Warning	SHV	Lafayette, Miller	56 min
Jan 21, 6:16 PM CST	Severe Thunderstorm Warning	SHV	Columbia, Union	59 min
Jan 21, 6:22 PM CST	Severe Thunderstorm Warning	SHV	Little River, Sevier	53 min
Jan 21, 6:25 PM CST	Severe Thunderstorm Warning	SHV	Howard, Sevier	65 min
Jan 21, 6:32 PM CST	Tornado Warning	SHV	Union	43 min
Jan 21, 6:44 PM CST	Tornado Warning	SHV	Columbia, Union	46 min
Jan 21, 6:48 PM CST	Tornado Warning	SHV	Lafayette	57 min
Jan 21, 7:21 PM CST	Tornado Warning	SHV	Columbia, Union	54 min
Jan 21, 7:33 PM CST	Tornado Warning	SHV	Union	42 min
Jan 21, 7:34 PM CST	Severe Thunderstorm Warning	SHV	Union	56 min
Jan 21, 7:37 PM CST	Severe Thunderstorm Warning	SHV	Columbia	68 min
Jan 21, 7:39 PM CST	Tornado Warning	SHV	Union	51 min
Jan 21, 8:21 PM CST	Tornado Warning	SHV	Union	39 min
Jan 21, 6:13 PM CST	Tornado Warning	SHV	Grant, Winn	47 min
Jan 21, 6:14 PM CST	Tornado Warning	SHV	Grant, Natchitoches	61 min
Jan 21, 6:22 PM CST	Special Weather Statement	SHV	Claiborne	38 min
Jan 21, 6:52 PM CST	Severe Thunderstorm Warning	SHV	LaSalle	23 min
Jan 21, 7:00 PM CST	Tornado Warning	SHV	Grant, LaSalle, Winn	22 min
Jan 21, 7:08 PM CST	Tornado Warning	SHV	Grant	52 min
Jan 21, 7:56 PM CST	Tornado Warning	SHV	Grant, LaSalle	64 min
Jan 21, 8:03 PM CST	Tornado Warning	SHV	Claiborne, Webster	57 min
Jan 21, 8:47 PM CST	Tornado Warning	SHV	Lincoln, Union	43 min
Jan 21, 8:48 PM CST	Special Weather Statement	SHV	Webster	42 min

Nearby

Tornado Warnings in Arkansas, 2017 Tornado Warnings in Louisiana, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.