Alert archive / Louisiana / Tornado Warnings in 2016

Tornado Warning 77, NWS Shreveport, LA

November 29, 2016Grant Parish, Natchitoches Parish, Winn Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Nov 29, 2016, 6:13 PM CST for Grant Parish, Natchitoches Parish, Winn Parish, Louisiana. It was in force for 32 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: Nov 29, 2016, 6:13 PM CST (00:13 UTC)
Expired: Nov 29, 2016, 6:45 PM CST
In force: 32 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Grant Parish, LA, Natchitoches Parish, LA, Winn Parish, LA

The radar

The Ft Polk radar (KPOE), 60 km from the middle of the area, began a volume at 00:14 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
Nov 29, 1:48 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Shreveport, LA (KBAD), launched 00:00Z, 0.2 hours before the alert went out and 133 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2296 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: -148 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

866 
WFUS54 KSHV 300013
TORSHV
LAC043-069-127-300045-
/O.NEW.KSHV.TO.W.0077.161130T0013Z-161130T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
613 PM CST TUE NOV 29 2016

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL GRANT PARISH IN NORTH CENTRAL LOUISIANA...
  SOUTHEASTERN NATCHITOCHES PARISH IN NORTHWESTERN LOUISIANA...
  SOUTH CENTRAL WINN PARISH IN NORTH CENTRAL LOUISIANA...

* UNTIL 645 PM CST
    
* AT 612 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR MONTGOMERY...OR 12 MILES NORTH OF LENA...
  MOVING EAST AT 25 MPH.

  HAZARD...TORNADO AND QUARTER 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 TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  CENTRAL GRANT...SOUTHEASTERN NATCHITOCHES AND SOUTH CENTRAL WINN
  PARISHES...INCLUDING THE FOLLOWING LOCATIONS: ALOHA...DRY PRONG...
  LAKE IATT AND WILLIANA.

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 3157 9287 3174 9289 3184 9254 3155 9245
TIME...MOT...LOC 0012Z 259DEG 21KT 3164 9280 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

09

2 follow-up statements

072 
WWUS54 KSHV 300025
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
625 PM CST TUE NOV 29 2016

LAC069-300034-
/O.CAN.KSHV.TO.W.0077.000000T0000Z-161130T0045Z/
NATCHITOCHES LA-
625 PM CST TUE NOV 29 2016

...THE TORNADO WARNING FOR SOUTHEASTERN NATCHITOCHES 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 900 PM CST FOR NORTH CENTRAL
LOUISIANA.

LAT...LON 3162 9277 3177 9280 3184 9254 3161 9247
TIME...MOT...LOC 0024Z 253DEG 25KT 3168 9267 

$$

LAC043-127-300045-
/O.CON.KSHV.TO.W.0077.000000T0000Z-161130T0045Z/
GRANT LA-WINN LA-
625 PM CST TUE NOV 29 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CST FOR NORTH
CENTRAL GRANT AND SOUTH CENTRAL WINN PARISHES...
    
AT 624 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 11 MILES NORTH OF COLFAX...OR 16 MILES NORTH OF LENA...
MOVING EAST AT 30 MPH.

HAZARD...TORNADO AND QUARTER 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. 

LOCATIONS IMPACTED INCLUDE...
LAKE IATT AND WILLIANA. 

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 3162 9277 3177 9280 3184 9254 3161 9247
TIME...MOT...LOC 0024Z 253DEG 25KT 3168 9267 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

09

858 
WWUS54 KSHV 300036
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
636 PM CST TUE NOV 29 2016

LAC043-127-300045-
/O.CON.KSHV.TO.W.0077.000000T0000Z-161130T0045Z/
GRANT LA-WINN LA-
636 PM CST TUE NOV 29 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CST FOR NORTH
CENTRAL GRANT AND SOUTH CENTRAL WINN PARISHES...
    
AT 636 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 14 MILES SOUTH OF WINNFIELD...MOVING EAST AT 35 MPH.

HAZARD...TORNADO AND QUARTER 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. 

LOCATIONS IMPACTED INCLUDE...
WILLIANA.

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 3167 9264 3181 9267 3184 9254 3166 9248
TIME...MOT...LOC 0036Z 251DEG 31KT 3173 9257 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

09

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 29, 6:06 PM CST	Special Weather Statement	SHV	Lincoln, Union	54 min
Nov 29, 6:21 PM CST	Special Weather Statement	SHV	Ouachita	24 min
Nov 29, 6:43 PM CST	Tornado Warning	SHV	Caldwell, Grant, LaSalle, Winn	47 min
Nov 29, 6:59 PM CST	Special Weather Statement	SHV	Jackson, Ouachita	46 min
Nov 29, 7:23 PM CST	Special Weather Statement	SHV	Winn	52 min
Nov 29, 7:27 PM CST	Severe Thunderstorm Warning	SHV	Jackson, Lincoln, Ouachita, Union	33 min
Nov 29, 7:46 PM CST	Special Weather Statement	SHV	Grant, LaSalle	44 min
Nov 29, 8:03 PM CST	Special Weather Statement	SHV	Ouachita	42 min
Nov 29, 8:33 PM CST	Special Weather Statement	SHV	Caldwell, Grant, LaSalle	57 min
Nov 29, 9:10 PM CST	Severe Thunderstorm Warning	SHV	Caldwell, Grant, LaSalle	35 min

Nearby

Tornado Warnings in Louisiana, 2016 Every tornado warning in 2016 Tornadoes in 2016

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.