Alert archive / Louisiana / Tornado Warnings in 2016

Tornado Warning 1, NWS Shreveport, LA

January 21, 2016Natchitoches Parish, Sabine Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Jan 21, 2016, 1:17 PM CST for Natchitoches Parish, Sabine Parish, Louisiana. It was in force for 28 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
Jan 21, 2016, 1:17 PM CST (19:17 UTC)
Expired
Jan 21, 2016, 1:45 PM CST
In force
28 min
Issued by
NWS Shreveport, LA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.0 in

Counties Natchitoches Parish, LA, Sabine Parish, LA

The radar

The Ft Polk radar (KPOE), 54 km from the middle of the area, began a volume at 19:16 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.

IssuedProductOfficeLasted
Jan 21, 11:48 AM CSTTornado WatchSPC5 hr

The nearest sounding before it

Shreveport, LA (KBAD), launched 12:00Z, 7.3 hours before the alert went out and 111 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-pSkew-T log-p diagram, Shreveport, LA at 12:00Z on 2016-01-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 12:00Z on 2016-01-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 203 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
431 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
203 m²/s²
0-3 km storm-relative helicity
253 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted.

221 
WFUS54 KSHV 211917
TORSHV
LAC069-085-211945-
/O.NEW.KSHV.TO.W.0001.160121T1917Z-160121T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
117 PM CST THU JAN 21 2016

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN NATCHITOCHES PARISH IN NORTHWESTERN LOUISIANA...
  EAST CENTRAL SABINE PARISH IN NORTHWESTERN LOUISIANA...

* UNTIL 145 PM CST
    
* AT 116 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
  WAS LOCATED 9 MILES EAST OF MANY...OR 18 MILES SOUTHWEST OF
  NATCHITOCHES...MOVING NORTHEAST 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. 

* THIS DANGEROUS STORM WILL BE NEAR...
  NATCHITOCHES AROUND 145 PM CST. 

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE FLORA...
NATCHEZ...BERMUDA AND PROVENCAL.

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 3148 9334 3156 9340 3180 9310 3162 9296
TIME...MOT...LOC 1916Z 235DEG 30KT 3155 9331 

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

$$

12
1 follow-up statement
736 
WWUS54 KSHV 211928
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
128 PM CST THU JAN 21 2016

LAC069-085-211945-
/O.CON.KSHV.TO.W.0001.000000T0000Z-160121T1945Z/
NATCHITOCHES LA-SABINE LA-
128 PM CST THU JAN 21 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 145 PM CST FOR
SOUTHWESTERN NATCHITOCHES AND EASTERN SABINE PARISHES...
    
AT 128 PM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 12 MILES SOUTHWEST OF NATCHITOCHES...MOVING NORTHEAST 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. 

THIS TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
SOUTHWESTERN NATCHITOCHES AND EASTERN SABINE PARISHES...INCLUDING THE
FOLLOWING LOCATIONS: FLORA...NATCHEZ...PROVENCAL AND BERMUDA.

LAT...LON 3152 9322 3158 9328 3178 9309 3162 9296
TIME...MOT...LOC 1928Z 240DEG 30KT 3159 9319 

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

$$

12

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 21, 4:17 AM CSTSevere Thunderstorm WarningSHVSabine28 min
Jan 21, 5:41 AM CSTSpecial Weather StatementSHVDe Soto49 min
Jan 21, 5:43 AM CSTSpecial Weather StatementSHVGrant47 min
Jan 21, 6:44 AM CSTSpecial Weather StatementSHVRed River46 min
Jan 21, 6:49 AM CSTSevere Thunderstorm WarningSHVBienville, Natchitoches, Red River41 min
Jan 21, 7:00 AM CSTSpecial Weather StatementSHVWebster45 min
Jan 21, 7:44 AM CSTSpecial Weather StatementSHVUnion16 min
Jan 21, 7:45 AM CSTSpecial Weather StatementSHVUnion45 min
Jan 21, 12:24 PM CSTSpecial Weather StatementSHVBienville, Red River51 min
Jan 21, 1:07 PM CSTSpecial Weather StatementSHVNatchitoches38 min
Jan 21, 1:13 PM CSTSevere Thunderstorm WarningSHVGrant, Natchitoches, Sabine, Winn47 min
Jan 21, 2:05 PM CSTSevere Thunderstorm WarningSHVLaSalle25 min
Jan 21, 3:50 PM CSTLake Wind AdvisorySHVBienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 11 more26 hr
Jan 21, 4:11 PM CSTWinter Weather AdvisorySHVClaiborne, Ouachita, Union16 hr

Nearby

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