Alert archive / Louisiana / Tornado Warnings in 2016

Tornado Warning 65, NWS Shreveport, LA

November 28, 2016Grant Parish, LaSalle Parish, Winn Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Nov 28, 2016, 2:41 PM CST for Grant Parish, LaSalle Parish, Winn Parish, Louisiana. It was in force for 19 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 28, 2016, 2:41 PM CST (20:41 UTC)
Expired: Nov 28, 2016, 3:00 PM CST
In force: 19 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Grant Parish, LA, LaSalle Parish, LA, Winn Parish, LA

The radar

The Ft Polk radar (KPOE), 72 km from the middle of the area, began a volume at 20:41 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 28, 11:08 AM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Shreveport, LA (KBAD), launched 12:00Z, 8.7 hours before the alert went out and 158 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: 14 J/kg
Mixed-layer CIN: -326 J/kg
Mixed-layer LCL: 701 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 499 m²/s²
0-3 km storm-relative helicity: 482 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

091 
WFUS54 KSHV 282041
TORSHV
LAC043-059-127-282100-
/O.NEW.KSHV.TO.W.0065.161128T2041Z-161128T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
241 PM CST MON NOV 28 2016

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN GRANT PARISH IN NORTH CENTRAL LOUISIANA...
  WEST CENTRAL LA SALLE PARISH IN NORTH CENTRAL LOUISIANA...
  EASTERN WINN PARISH IN NORTH CENTRAL LOUISIANA...

* UNTIL 300 PM CST
    
* AT 241 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 13 MILES NORTH OF TIMBER TRAILS...OR 19 MILES
  NORTHEAST OF BOYCE...MOVING NORTHEAST AT 50 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
  NORTHEASTERN GRANT...WEST CENTRAL LA SALLE AND EASTERN WINN
  PARISHES...INCLUDING THE FOLLOWING LOCATIONS: ZENORIA...POLLOCK...
  DRY PRONG...GEORGETOWN...ROCHELLE...WILLIANA AND BENTLEY.

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 3149 9252 3165 9260 3181 9236 3160 9216
TIME...MOT...LOC 2041Z 243DEG 42KT 3161 9247 

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

$$

FB

1 follow-up statement

893 
WWUS54 KSHV 282053
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
253 PM CST MON NOV 28 2016

LAC043-059-127-282100-
/O.CON.KSHV.TO.W.0065.000000T0000Z-161128T2100Z/
GRANT LA-LA SALLE LA-WINN LA-
253 PM CST MON NOV 28 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM CST FOR
NORTHEASTERN GRANT...WEST CENTRAL LA SALLE AND EASTERN WINN
PARISHES...
    
AT 252 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 10 MILES WEST OF MIDWAY...OR 24 MILES NORTH OF
PINEVILLE...MOVING NORTHEAST AT 50 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...
GEORGETOWN...ZENORIA AND ROCHELLE. 

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.

IF A TORNADO OR OTHER SEVERE WEATHER IS SPOTTED...REPORT IT TO THE
NATIONAL WEATHER SERVICE OR YOUR LOCAL NEAREST LAW ENFORCEMENT AGENCY
WHO WILL SEND YOUR REPORT. THIS ACT MAY SAVE LIVES OF OTHERS IN THE
PATH OF DANGEROUS WEATHER.

&&

LAT...LON 3154 9236 3174 9247 3181 9236 3160 9216
TIME...MOT...LOC 2052Z 243DEG 42KT 3167 9233 

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

$$

FB

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 27, 9:17 PM CST	Lake Wind Advisory	SHV	Bienville, Caldwell, Claiborne, Grant, Jackson, LaSalle and 7 more	20 hr
Nov 28, 11:19 AM CST	Special Weather Statement	SHV	Bossier, Caddo	41 min
Nov 28, 11:55 AM CST	Special Weather Statement	SHV	Bienville, Claiborne, De Soto, Lincoln, Webster	35 min
Nov 28, 12:02 PM CST	Special Weather Statement	SHV	Bossier, Caddo	28 min
Nov 28, 12:04 PM CST	Special Weather Statement	SHV	De Soto	26 min
Nov 28, 12:32 PM CST	Special Weather Statement	SHV	Bienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 7 more	43 min
Nov 28, 1:16 PM CST	Special Weather Statement	SHV	Bienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 11 more	44 min
Nov 28, 2:01 PM CST	Severe Thunderstorm Warning	SHV	De Soto, Sabine	21 min
Nov 28, 2:02 PM CST	Severe Thunderstorm Warning	SHV	Natchitoches, Sabine	31 min
Nov 28, 2:38 PM CST	Severe Thunderstorm Warning	SHV	Grant, LaSalle, Winn	25 min
Nov 28, 2:59 PM CST	Tornado Warning	SHV	Caldwell, Grant, LaSalle, Winn	16 min
Nov 28, 3:35 PM CST	Special Weather Statement	SHV	LaSalle	25 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.