Alert archive / Louisiana / Tornado Warnings in 2017

Tornado Warning 84, NWS Shreveport, LA

June 23, 2017Natchitoches Parish, Red River Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Jun 23, 2017, 5:27 AM CDT for Natchitoches Parish, Red River Parish, Louisiana. It was in force for 48 min. 2 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: Jun 23, 2017, 5:27 AM CDT (10:27 UTC)
Expired: Jun 23, 2017, 6:15 AM CDT
In force: 48 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Natchitoches Parish, LA, Red River Parish, LA

The radar

The Ft Polk radar (KPOE), 82 km from the middle of the area, began a volume at 10:30 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
Jun 23, 5:55 AM CDT	TSTM WND DMG	2 Ese Powhatan, LA	TREES DOWN.
Jun 23, 6:17 AM CDT	TSTM WND DMG	3 Se Powhatan, LA	SEVERAL TREES UPROOTED AND LARGE LIMBS SNAPPED NEAR AND SOUTH OF POWHATAN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Shreveport, LA (KBAD), launched 00:00Z, 10.5 hours before the alert went out and 84 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: 1309 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 488 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: -18 m²/s²
Significant tornado parameter: -0.2
Supercell composite: -1.1

Open this sounding in Storm Lab

The text

As transmitted.

753 
WFUS54 KSHV 231027
TORSHV
LAC069-081-231115-
/O.NEW.KSHV.TO.W.0084.170623T1027Z-170623T1115Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Shreveport LA
527 AM CDT FRI JUN 23 2017

The National Weather Service in Shreveport has issued a

* Tornado Warning for...
  Southeastern Red River Parish in northwestern Louisiana...
  West central Natchitoches Parish in northwestern Louisiana...

* Until 615 AM CDT
    
* At 527 AM CDT, a severe thunderstorm capable of producing a tornado
  was located 11 miles west of Campti, or 14 miles northwest of
  Natchitoches, moving east northeast at 15 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...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...
  Campti around 615 AM CDT. 

Other locations impacted by this tornadic thunderstorm include Allen
and Powhatan.

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 3182 9334 3188 9335 3195 9313 3181 9309
TIME...MOT...LOC 1027Z 263DEG 13KT 3186 9330 

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

$$

13

3 follow-up statements

819 
WWUS54 KSHV 231039
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
539 AM CDT FRI JUN 23 2017

LAC069-081-231115-
/O.CON.KSHV.TO.W.0084.000000T0000Z-170623T1115Z/
Red River LA-Natchitoches LA-
539 AM CDT FRI JUN 23 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 AM CDT FOR
SOUTHEASTERN RED RIVER AND CENTRAL NATCHITOCHES PARISHES...
    
At 538 AM CDT, a severe thunderstorm capable of producing a tornado 
was located 5 miles west southwest of Powhatten, or 9 miles west of 
Campti, moving east at 15 mph.

HAZARD...Tornado. 

SOURCE...Radar indicated rotation. 

IMPACT...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...
  Campti around 615 AM CDT. 

Other locations impacted by this tornadic thunderstorm include
Powhatan and Allen.

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 3182 9328 3190 9328 3195 9313 3181 9309
TIME...MOT...LOC 1038Z 269DEG 12KT 3185 9326 

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

$$

13

094 
WWUS54 KSHV 231055
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
555 AM CDT FRI JUN 23 2017

LAC081-231104-
/O.CAN.KSHV.TO.W.0084.000000T0000Z-170623T1115Z/
Red River LA-
555 AM CDT FRI JUN 23 2017

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

LAT...LON 3182 9323 3189 9324 3195 9313 3181 9309
TIME...MOT...LOC 1054Z 264DEG 6KT 3186 9321 

$$

LAC069-231115-
/O.CON.KSHV.TO.W.0084.000000T0000Z-170623T1115Z/
Natchitoches LA-
555 AM CDT FRI JUN 23 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 AM CDT FOR
NORTHWESTERN NATCHITOCHES PARISH...
    
At 554 AM CDT, a severe thunderstorm capable of producing a tornado 
was located near Powhatan, or 5 miles west southwest of Campti, 
moving east at 12 mph.

HAZARD...Tornado. 

SOURCE...Radar indicated rotation. 

IMPACT...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...
  Campti around 615 AM CDT. 

Other locations impacted by this tornadic thunderstorm include
Powhatan.

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 3182 9323 3189 9324 3195 9313 3181 9309
TIME...MOT...LOC 1054Z 264DEG 6KT 3186 9321 

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

$$

13

987 
WWUS54 KSHV 231106
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
606 AM CDT FRI JUN 23 2017

LAC069-231115-
/O.CON.KSHV.TO.W.0084.000000T0000Z-170623T1115Z/
Natchitoches LA-
606 AM CDT FRI JUN 23 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 AM CDT FOR CENTRAL
NATCHITOCHES PARISH...
    
At 604 AM CDT, a severe thunderstorm capable of producing a tornado 
was located just west of Campti, moving east at 15 mph.

HAZARD...Tornado. 

SOURCE...Radar indicated rotation. 

IMPACT...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...
  Campti around 615 AM CDT. 

Other locations impacted by this tornadic thunderstorm include
Powhatan.

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 3184 9318 3190 9321 3195 9313 3183 9310
TIME...MOT...LOC 1104Z 258DEG 12KT 3187 9318 

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

$$

13

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 3:49 AM CDT	Special Weather Statement	SHV	Sabine	41 min
Jun 23, 4:00 AM CDT	Severe Thunderstorm Warning	SHV	De Soto, Natchitoches, Sabine	45 min
Jun 23, 4:51 AM CDT	Severe Thunderstorm Warning	SHV	Natchitoches, Red River	54 min
Jun 23, 4:59 AM CDT	Flash Flood Warning	SHV	De Soto, Natchitoches, Red River	3 hr
Jun 23, 6:47 AM CDT	Tornado Warning	SHV	Natchitoches	20 min
Jun 23, 7:52 AM CDT	Areal Flood Warning	SHV	Claiborne, Lincoln, Union, Webster	3 hr
Jun 23, 8:16 AM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Lincoln, Union	59 min
Jun 23, 9:13 AM CDT	Special Weather Statement	SHV	Union	47 min
Jun 23, 10:23 AM CDT	Flash Flood Warning	SHV	Claiborne, Lincoln, Ouachita, Union	3 hr
Jun 23, 10:28 AM CDT	Special Weather Statement	SHV	Union	47 min
Jun 23, 10:53 AM CDT	Severe Thunderstorm Warning	SHV	Union	67 min

Nearby

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.