Alert archive / Louisiana / Tornado Warnings in 2018

Tornado Warning 30, NWS Jackson, MS

April 13, 2018Richland Parish, Louisiana

NWS Jackson, MS issued this tornado warning at Apr 13, 2018, 8:35 PM CDT for Richland Parish, Louisiana. It was in force for 55 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: Apr 13, 2018, 8:35 PM CDT (01:35 UTC)
Expired: Apr 13, 2018, 9:30 PM CDT
In force: 55 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.75 in

County Richland Parish, LA

The radar

The Ft Polk radar (KPOE), 170 km from the middle of the area, began a volume at 01:36 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 13, 9:00 PM CDT	TORNADO	4 Wsw Rayville, LA	NWS STORM SURVEY FOUND AN EF0 TORNADO WITH MAXIMUM WINDS OF 75MPH, PATH LENGTH OF 3.28 MILES AND MAX WIDTH OF 400 YARDS. THIS WEAK TORNADO BEGAN ALONG VENABLE ROAD NEAR OLD RIVER ROAD CAUSING MOSTLY MINOR TREE DAMAGE. IT CONTINUED NORTHEAST CROSSING I-20 AT TH
Apr 13, 9:04 PM CDT	TSTM WND DMG	3 Wnw Rayville, LA	A LARGE TREE WAS DOWNED ALONG US 80 IN GIRARD.

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, 7:22 PM CDT	Tornado Watch	SPC	3 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 1.6 hours before the alert went out and 172 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: 92 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 1418 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 158 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

773 
WFUS54 KJAN 140135
TORJAN
LAC083-140230-
/O.NEW.KJAN.TO.W.0030.180414T0135Z-180414T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Jackson MS
835 PM CDT FRI APR 13 2018

The National Weather Service in Jackson has issued a

* Tornado Warning for...
  Western Richland Parish in northeastern Louisiana...

* Until 930 PM CDT
    
* At 835 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Buckner, or 10 miles west of Mangham, moving
  northeast at 25 mph.

  HAZARD...Tornado and golf ball size hail. 

  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. 

* This dangerous storm will be near...
  Alto around 845 PM CDT. 
  Archibald around 855 PM CDT. 
  Start around 900 PM CDT. 
  Rayville around 910 PM CDT. 
  Holly Ridge around 925 PM CDT. 

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3235 9201 3251 9190 3254 9189 3252 9186
      3252 9184 3254 9184 3257 9181 3245 9158
      3220 9197 3223 9199 3225 9199 3226 9200
      3227 9199 3228 9203
TIME...MOT...LOC 0135Z 226DEG 22KT 3233 9195 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

NF

3 follow-up statements

915 
WWUS54 KJAN 140152
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
852 PM CDT FRI APR 13 2018

LAC083-140230-
/O.CON.KJAN.TO.W.0030.000000T0000Z-180414T0230Z/
Richland LA-
852 PM CDT FRI APR 13 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR WESTERN
RICHLAND PARISH...
    
At 852 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Start, moving northeast at 30 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. 

This dangerous storm will be near...
  Rayville around 900 PM CDT. 
  Holly Ridge around 915 PM CDT. 

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3235 9201 3251 9190 3254 9189 3252 9186
      3252 9184 3254 9184 3257 9181 3245 9158
      3220 9197 3223 9199 3225 9199 3226 9200
      3227 9199 3228 9203
TIME...MOT...LOC 0152Z 231DEG 25KT 3243 9184 

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

$$

NF

907 
WWUS54 KJAN 140208
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
908 PM CDT FRI APR 13 2018

LAC083-140230-
/O.CON.KJAN.TO.W.0030.000000T0000Z-180414T0230Z/
Richland LA-
908 PM CDT FRI APR 13 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR WESTERN
RICHLAND PARISH...
        
At 908 PM CDT, a confirmed tornado was located over Start, moving
northeast at 10 mph.

HAZARD...Damaging tornado and quarter size hail. 

SOURCE...Radar confirmed tornado. 

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. 

This tornado will be near...
  Rayville around 915 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3235 9201 3251 9190 3254 9189 3252 9186
      3252 9184 3254 9184 3257 9181 3245 9158
      3220 9197 3223 9199 3225 9199 3226 9200
      3227 9199 3228 9203
TIME...MOT...LOC 0208Z 224DEG 11KT 3247 9182 

TORNADO...OBSERVED
HAIL...1.00IN

$$

NF

194 
WWUS54 KJAN 140226
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
926 PM CDT FRI APR 13 2018

LAC083-140235-
/O.EXP.KJAN.TO.W.0030.000000T0000Z-180414T0230Z/
Richland LA-
926 PM CDT FRI APR 13 2018

...THE TORNADO WARNING FOR WESTERN RICHLAND PARISH WILL EXPIRE AT 930
PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

A tornado watch remains in effect until 300 AM CDT for northeastern
Louisiana.

LAT...LON 3235 9201 3251 9190 3254 9189 3252 9186
      3252 9184 3254 9184 3257 9181 3245 9158
      3220 9197 3223 9199 3225 9199 3226 9200
      3227 9199 3228 9203
TIME...MOT...LOC 0225Z 226DEG 22KT 3254 9173 

$$

NF

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 13, 7:24 PM CDT	Tornado Warning Tornado observed	JAN	Morehouse	34 min
Apr 13, 8:12 PM CDT	Severe Thunderstorm Warning	JAN	Richland	48 min
Apr 13, 8:28 PM CDT	Tornado Warning	JAN	Richland	62 min
Apr 13, 9:04 PM CDT	Tornado Warning	JAN	Morehouse, Richland, West Carroll	56 min
Apr 13, 9:59 PM CDT	Severe Thunderstorm Warning	JAN	East Carroll, Morehouse, West Carroll	46 min
Apr 13, 10:18 PM CDT	Flash Flood Warning	JAN	Morehouse, West Carroll	3 hr
Apr 13, 10:43 PM CDT	Severe Thunderstorm Warning	JAN	East Carroll, West Carroll	36 min
Apr 14, 2:32 AM CDT	Severe Thunderstorm Warning	JAN	Morehouse	58 min
Apr 14, 2:54 AM CDT	Tornado Warning	JAN	Morehouse	51 min
Apr 14, 3:30 AM CDT	Tornado Warning	JAN	East Carroll, West Carroll	49 min
Apr 14, 5:32 AM CDT	Special Weather Statement	JAN	Catahoula	43 min
Apr 14, 5:40 AM CDT	Severe Thunderstorm Warning	JAN	Catahoula, Concordia	23 min

Nearby

Tornado Warnings in Louisiana, 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.