Alert archive / Louisiana / Tornado Warnings in 2017

Tornado Warning 30, NWS Shreveport, LA

March 25, 2017Jackson Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Mar 25, 2017, 12:03 AM CDT for Jackson Parish, Louisiana. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 25, 2017, 12:03 AM CDT (05:03 UTC)
Expired: Mar 25, 2017, 12:30 AM CDT
In force: 27 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Jackson Parish, LA

The radar

The Shreveport radar (KSHV), 127 km from the middle of the area, began a volume at 05:05 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 24, 9:14 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Shreveport, LA (KBAD), launched 00:00Z, 5.1 hours before the alert went out and 119 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: 24 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 1519 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 276 m²/s²
0-3 km storm-relative helicity: 418 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

450 
WFUS54 KSHV 250503
TORSHV
LAC049-250530-
/O.NEW.KSHV.TO.W.0030.170325T0503Z-170325T0530Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Shreveport LA
1203 AM CDT SAT MAR 25 2017

The National Weather Service in Shreveport has issued a

* Tornado Warning for...
  Central Jackson Parish in north central Louisiana...

* Until 1230 AM CDT
    
* At 1203 AM CDT, a severe thunderstorm capable of producing a 
  tornado was located 4 miles east of Jonesboro, 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. 

* This tornadic thunderstorm will remain over mainly rural areas of
  central Jackson Parish, including the following locations: Eros and
  Chatham.

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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

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

&&

LAT...LON 3215 9265 3227 9271 3245 9242 3244 9241
      3242 9242 3241 9242 3239 9240 3228 9237
TIME...MOT...LOC 0503Z 230DEG 38KT 3225 9260 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

15

1 follow-up statement

367 
WWUS54 KSHV 250522
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
1222 AM CDT SAT MAR 25 2017

LAC049-250530-
/O.CON.KSHV.TO.W.0030.000000T0000Z-170325T0530Z/
Jackson LA-
1222 AM CDT SAT MAR 25 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT FOR
NORTHEASTERN JACKSON PARISH...

At 1222 AM CDT, a severe squall line capable of producing both 
tornadoes and straight line wind damage was located 15 miles 
southeast of Ruston, or just southwest of Eros, moving northeast at 
45 mph. The radar based rotation has weakened in the last few 
minutes, but could quickly redevelop shortly.   

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...
Chatham and Eros. 

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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

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

&&

LAT...LON 3231 9247 3237 9254 3245 9242 3244 9241
      3242 9242 3241 9242 3239 9240 3228 9237
TIME...MOT...LOC 0521Z 228DEG 37KT 3237 9244 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

15

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 24, 8:02 PM CDT	Severe Thunderstorm Warning	SHV	Caddo	43 min
Mar 24, 9:00 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo	45 min
Mar 24, 9:32 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Claiborne, Webster	43 min
Mar 24, 9:38 PM CDT	Severe Thunderstorm Warning	SHV	De Soto, Sabine	37 min
Mar 24, 10:09 PM CDT	Tornado Warning	SHV	De Soto, Sabine	51 min
Mar 24, 10:13 PM CDT	Severe Thunderstorm Warning	SHV	De Soto, Natchitoches, Red River, Sabine	47 min
Mar 24, 10:46 PM CDT	Tornado Warning	SHV	Bienville, Bossier, De Soto, Red River	44 min
Mar 24, 11:00 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Grant, Jackson, Natchitoches, Red River, Sabine and 1 more	60 min
Mar 24, 11:03 PM CDT	Tornado Warning	SHV	Natchitoches, Winn	28 min
Mar 24, 11:38 PM CDT	Areal Flood Advisory	SHV	Sabine	3 hr
Mar 25, 12:00 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Caldwell, Grant, Jackson, Natchitoches, Ouachita and 1 more	60 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.