Alert archive / Louisiana / Tornado Warnings in 2018

Tornado Warning 69, NWS Shreveport, LA

April 14, 2018Bossier Parish, Claiborne Parish, Webster Parish, Louisiana; Columbia County, Arkansas

NWS Shreveport, LA issued this tornado warning at Apr 14, 2018, 12:46 AM CDT for Bossier Parish, Claiborne Parish, Webster Parish, Louisiana; Columbia County, Arkansas. It was in force for 29 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: Apr 14, 2018, 12:46 AM CDT (05:46 UTC)
Expired: Apr 14, 2018, 1:15 AM CDT
In force: 29 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Columbia County, AR, Bossier Parish, LA, Claiborne Parish, LA, Webster Parish, LA

The radar

The Shreveport radar (KSHV), 70 km from the middle of the area, began a volume at 05:48 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 14, 12:50 AM CDT	TSTM WND DMG	1 N Sarepta, LA	TREE DOWN ON HOME ALONG MAIN STREET.
Apr 14, 12:58 AM CDT	TORNADO	1 W Shongaloo, LA	AN EF-1 TORNADO TOUCHED DOWN 1 MILE WEST OF SHONGALOO AND CONTINUED FOR 2.92 MILES TO THE NORTHEAST. IT DID MAINLY TREE DAMAGE WHERE IT UPROOTED AND SNAPPED TREES ALONGS ITS PATH. THE MAXIMUM WINDS WERE 95 MPH AND THE MAXIMUM WIDTH WAS 500 YARDS.
Apr 14, 1:05 AM CDT	TSTM WND DMG	2 E Emerson, AR	TREES AND POWER LINES DOWN ALONG CR 16 EAST OF BUSSEY, AR.

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, 9:53 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Shreveport, LA (KBAD), launched 00:00Z, 5.8 hours before the alert went out and 62 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.

390 
WFUS54 KSHV 140546
TORSHV
ARC027-LAC015-027-119-140615-
/O.NEW.KSHV.TO.W.0069.180414T0546Z-180414T0615Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Shreveport LA
1246 AM CDT SAT APR 14 2018

The National Weather Service in Shreveport has issued a

* Tornado Warning for...
  South central Columbia County in southwestern Arkansas...
  Northwestern Webster Parish in northwestern Louisiana...
  Northwestern Claiborne Parish in northwestern Louisiana...
  Northeastern Bossier Parish in northwestern Louisiana...

* Until 115 AM CDT
    
* At 1246 AM CDT, a severe thunderstorm capable of producing a
  tornado was located over Sarepta, or 8 miles south of Springhill,
  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...
  Haynesville, Cullen, Cotton Valley, Sarepta, Emerson, Shongaloo,
  Horsehead and Walkerville.

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.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 3280 9349 3290 9356 3317 9318 3296 9303
TIME...MOT...LOC 0546Z 239DEG 39KT 3288 9346 

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

$$

19

2 follow-up statements

543 
WWUS54 KSHV 140553
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
1253 AM CDT SAT APR 14 2018

LAC015-140602-
/O.CAN.KSHV.TO.W.0069.000000T0000Z-180414T0615Z/
Bossier LA-
1253 AM CDT SAT APR 14 2018

...THE TORNADO WARNING FOR NORTHEASTERN BOSSIER PARISH IS
CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A tornado watch remains in effect until 600 AM CDT for southwestern
Arkansas...and northwestern Louisiana.

LAT...LON 3284 9338 3297 9346 3317 9318 3296 9303
TIME...MOT...LOC 0552Z 270DEG 39KT 3291 9338 

$$

ARC027-LAC027-119-140615-
/O.CON.KSHV.TO.W.0069.000000T0000Z-180414T0615Z/
Columbia AR-Webster LA-Claiborne LA-
1253 AM CDT SAT APR 14 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 115 AM CDT FOR SOUTH
CENTRAL COLUMBIA COUNTY...NORTH CENTRAL WEBSTER AND NORTHWESTERN
CLAIBORNE PARISHES...
    
At 1252 AM CDT, a severe thunderstorm capable of producing a tornado
was located near Sarepta, or 7 miles southeast of Springhill, moving
east 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...
Haynesville, Cullen, Emerson, Shongaloo, Horsehead and Walkerville. 

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.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 3284 9338 3297 9346 3317 9318 3296 9303
TIME...MOT...LOC 0552Z 270DEG 39KT 3291 9338 

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

$$

19

788 
WWUS54 KSHV 140604
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
104 AM CDT SAT APR 14 2018

ARC027-LAC027-119-140615-
/O.CON.KSHV.TO.W.0069.000000T0000Z-180414T0615Z/
Columbia AR-Webster LA-Claiborne LA-
104 AM CDT SAT APR 14 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 115 AM CDT FOR SOUTH
CENTRAL COLUMBIA COUNTY...NORTH CENTRAL WEBSTER AND NORTHWESTERN
CLAIBORNE PARISHES...
    
At 104 AM CDT, a severe thunderstorm capable of producing a tornado
was located near Shongaloo, or 12 miles east of Springhill, moving
east 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...
Haynesville, Emerson, Shongaloo and Walkerville. 

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.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 3291 9329 3302 9336 3317 9318 3296 9303
TIME...MOT...LOC 0604Z 270DEG 39KT 3297 9324 

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
Apr 13, 7:11 PM CDT	Tornado Warning Tornado observed	SHV	Union	34 min
Apr 13, 7:35 PM CDT	Tornado Warning	SHV	Caldwell, Ouachita	40 min
Apr 13, 8:16 PM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Ouachita	29 min
Apr 13, 8:17 PM CDT	Tornado Warning	SHV	Caldwell, Ouachita	28 min
Apr 13, 11:30 PM CDT	Severe Thunderstorm Warning	SHV	Caddo	45 min
Apr 13, 11:54 PM CDT	Tornado Warning	SHV	Caddo	21 min
Apr 14, 12:14 AM CDT	Tornado Warning	SHV	Bossier, Caddo	31 min
Apr 14, 12:15 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Bossier, Caddo, De Soto, Red River, Webster	45 min
Apr 14, 12:43 AM CDT	Tornado Warning	SHV	Bossier, Claiborne, Webster	32 min
Apr 14, 12:59 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Bossier, Caddo, Claiborne, De Soto, Jackson and 6 more	46 min
Apr 14, 1:08 AM CDT	Tornado Warning	SHV	Claiborne, Webster	25 min
Apr 14, 1:10 AM CDT	Special Weather Statement	SHV	Sabine	65 min
Apr 14, 1:11 AM CDT	Tornado Warning	SHV	Claiborne	34 min
Apr 14, 1:30 AM CDT	Tornado Warning	SHV	Claiborne, Union	33 min
Apr 14, 1:45 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Caldwell, Claiborne, Jackson, Lincoln, Ouachita and 1 more	75 min
Apr 14, 1:52 AM CDT	Tornado Warning	SHV	Bienville, Jackson, Lincoln, Ouachita, Union	38 min
Apr 14, 1:56 AM CDT	Tornado Warning	SHV	Natchitoches, Winn	34 min
Apr 14, 2:26 AM CDT	Tornado Warning	SHV	Jackson, Winn	34 min
Apr 14, 2:27 AM CDT	Tornado Warning	SHV	Lincoln, Ouachita, Union	33 min
Apr 14, 2:31 AM CDT	Tornado Warning	SHV	Jackson, Lincoln, Ouachita	29 min
Apr 14, 2:51 AM CDT	Tornado Warning	SHV	Caldwell, Jackson, Ouachita	24 min
Apr 14, 2:59 AM CDT	Tornado Warning	SHV	Jackson, Ouachita, Union	31 min
Apr 14, 3:14 AM CDT	Tornado Warning	SHV	Caldwell, Ouachita	20 min
Apr 14, 4:24 AM CDT	Lake Wind Advisory	SHV	Bienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 11 more	15 hr
Apr 13, 7:51 PM CDT	Tornado Warning	SHV	Howard, Little River, Sevier	25 min
Apr 13, 8:15 PM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Howard, Little River, Sevier	45 min
Apr 13, 8:53 PM CDT	Severe Thunderstorm Warning	SHV	Howard, Little River, Sevier	29 min
Apr 13, 9:27 PM CDT	Special Weather Statement	SHV	Howard, Sevier	48 min
Apr 13, 10:19 PM CDT	Special Weather Statement	SHV	Hempstead, Howard, Little River, Sevier	41 min
Apr 13, 11:35 PM CDT	Special Weather Statement	SHV	Little River, Sevier	40 min
Apr 14, 1:13 AM CDT	Special Weather Statement	SHV	Union	17 min
Apr 14, 1:28 AM CDT	Tornado Warning	SHV	Columbia, Union	32 min
Apr 14, 2:01 AM CDT	Tornado Warning	SHV	Union	29 min

Nearby

Tornado Warnings in Louisiana, 2018 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.