Alert archive / Texas / Tornado Warnings in 2015

Tornado Warning 13, NWS Shreveport, LA

April 27, 2015Cherokee County, Texas

NWS Shreveport, LA issued this tornado warning at Apr 27, 2015, 3:49 AM CDT for Cherokee County, Texas. It was in force for 26 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: Apr 27, 2015, 3:49 AM CDT (08:49 UTC)
Expired: Apr 27, 2015, 4:15 AM CDT
In force: 26 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Cherokee County, TX

The radar

The Shreveport radar (KSHV), 160 km from the middle of the area, began a volume at 08:50 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
Apr 27, 1:27 AM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Shreveport, LA (KBAD), launched 00:00Z, 8.8 hours before the alert went out and 168 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: 86 J/kg
Mixed-layer CIN: -209 J/kg
Mixed-layer LCL: 2577 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 13 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

228 
WFUS54 KSHV 270849
TORSHV
TXC073-270915-
/O.NEW.KSHV.TO.W.0013.150427T0849Z-150427T0915Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
349 AM CDT MON APR 27 2015

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN CHEROKEE COUNTY IN NORTHEASTERN TEXAS...

* UNTIL 415 AM CDT
    
* AT 348 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 11 MILES SOUTH OF MAYDELLE...OR 15 MILES
  SOUTHWEST OF RUSK...MOVING SOUTHEAST 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. 

* THIS DANGEROUS STORM WILL BE NEAR...
  MORRILL AROUND 415 AM 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.

&&

LAT...LON 3175 9536 3170 9498 3147 9507 3147 9509
      3149 9511 3150 9509 3152 9510 3154 9514
      3156 9514 3159 9517 3157 9521 3159 9527
      3159 9528 3161 9526 3163 9529 3166 9528
      3168 9529 3172 9534 3173 9533 3174 9537
TIME...MOT...LOC 0848Z 301DEG 24KT 3164 9534 

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

$$

09

1 follow-up statement

547 
WWUS54 KSHV 270914
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
414 AM CDT MON APR 27 2015

TXC073-270923-
/O.EXP.KSHV.TO.W.0013.000000T0000Z-150427T0915Z/
CHEROKEE TX-
414 AM CDT MON APR 27 2015

...THE TORNADO WARNING FOR SOUTHERN CHEROKEE COUNTY WILL EXPIRE AT
415 AM CDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND NO LONGER 
APPEARS CAPABLE OF PRODUCING A TORNADO. THEREFORE THE WARNING WILL 
BE ALLOWED TO EXPIRE.  HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH 
THIS THUNDERSTORM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 AM CDT FOR NORTHEASTERN
TEXAS.

REMEMBER...A SEVERE THUNDERSTORM WARNING STILL REMAINS IN EFFECT FOR
CENTRAL CHEROKEE COUNTY UNTIL 445 AM CDT.

LAT...LON 3175 9536 3170 9498 3147 9507 3147 9509
      3149 9511 3150 9509 3152 9510 3154 9514
      3156 9514 3159 9517 3157 9521 3159 9527
      3159 9528 3161 9526 3163 9529 3166 9528
      3168 9529 3172 9534 3173 9533 3174 9537
TIME...MOT...LOC 0911Z 301DEG 24KT 3164 9534 

$$

09

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 3:11 AM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Smith	49 min
Apr 27, 3:38 AM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Nacogdoches, Rusk	67 min
Apr 27, 4:10 AM CDT	Tornado Warning	SHV	Cherokee	24 min
Apr 27, 4:32 AM CDT	Severe Thunderstorm Warning	SHV	Angelina, Cherokee, Nacogdoches	43 min
Apr 27, 4:49 AM CDT	Flash Flood Warning	SHV	Angelina, Cherokee, Nacogdoches	116 min
Apr 27, 4:50 AM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Nacogdoches, Rusk	40 min
Apr 27, 5:02 AM CDT	Severe Thunderstorm Warning	SHV	Angelina, Nacogdoches, San Augustine	43 min
Apr 27, 5:18 AM CDT	Severe Thunderstorm Warning	SHV	Angelina, Cherokee, Nacogdoches, Panola, Rusk, Sabine and 2 more	42 min
Apr 27, 5:43 AM CDT	Severe Thunderstorm Warning	SHV	Angelina, Nacogdoches, Sabine, San Augustine	62 min
Apr 27, 6:36 AM CDT	Flash Flood Warning	SHV	Angelina, Nacogdoches, Sabine, San Augustine	3 hr

Nearby

Tornado Warnings in Texas, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.