Alert archive / Texas / Tornado Warnings in 2017

Tornado Warning 79, NWS Lake Charles, LA

August 28, 2017Jefferson County, Texas

NWS Lake Charles, LA issued this tornado warning at Aug 28, 2017, 3:42 AM CDT for Jefferson County, Texas. It was in force for 38 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: Aug 28, 2017, 3:42 AM CDT (08:42 UTC)
Expired: Aug 28, 2017, 4:20 AM CDT
In force: 38 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Jefferson County, TX

The radar

The Lake Charles radar (KLCH), 80 km from the middle of the area, began a volume at 08:44 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
Aug 28, 1:51 AM CDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 8.7 hours before the alert went out and 81 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: 311 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 714 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 148 m²/s²
0-3 km storm-relative helicity: 253 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted.

801 
WFUS54 KLCH 280842
TORLCH
TXC245-280930-
/O.NEW.KLCH.TO.W.0079.170828T0842Z-170828T0930Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Lake Charles LA
342 AM CDT MON AUG 28 2017

The National Weather Service in Lake Charles has issued a

* Tornado Warning for...
  Southeastern Jefferson County in southeastern Texas...

* Until 430 AM CDT
    
* At 342 AM CDT, a severe thunderstorm capable of producing a tornado
  was located near Sabine Pass, moving north at 30 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 dangerous storm will be near...
  Port Acres around 410 AM CDT. 
  Nederland and Southeast Texas Regional Airport around 415 AM CDT. 
  Central Gardens around 420 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 2968 9404 3000 9421 3003 9402 2985 9393
      2983 9395 2983 9392 2982 9393 2982 9392
      2981 9393 2981 9395 2980 9395 2977 9393
      2976 9390 2974 9390 2972 9387 2968 9384
TIME...MOT...LOC 0842Z 160DEG 28KT 2971 9395 

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

$$

06

4 follow-up statements

596 
WWUS54 KLCH 280854
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
354 AM CDT MON AUG 28 2017

TXC245-280930-
/O.CON.KLCH.TO.W.0079.000000T0000Z-170828T0930Z/
Jefferson TX-
354 AM CDT MON AUG 28 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 AM CDT FOR CENTRAL
JEFFERSON COUNTY...
    
At 354 AM CDT, a severe thunderstorm capable of producing a tornado
was located 7 miles south of Port Acres, or 7 miles northwest of
Sabine Pass, moving north at 30 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 dangerous storm will be near...
  Port Acres around 410 AM CDT. 
  Southeast Texas Regional Airport around 415 AM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to 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 2972 9406 3000 9421 3003 9405 2984 9396
      2983 9395 2983 9392 2982 9393 2982 9392
      2981 9393 2981 9395 2980 9395 2974 9391
TIME...MOT...LOC 0854Z 160DEG 28KT 2980 9399 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

06

253 
WWUS54 KLCH 280905
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
405 AM CDT MON AUG 28 2017

TXC245-280930-
/O.CON.KLCH.TO.W.0079.000000T0000Z-170828T0930Z/
Jefferson TX-
405 AM CDT MON AUG 28 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 AM CDT FOR CENTRAL
JEFFERSON COUNTY...
    
At 404 AM CDT, a severe thunderstorm capable of producing a tornado
was located over Port Acres, or near Port Arthur, moving north at 30
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 Jefferson County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to 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 2977 9408 3000 9421 3003 9406 2984 9397
      2981 9395
TIME...MOT...LOC 0904Z 160DEG 28KT 2988 9402 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

06

313 
WWUS54 KLCH 280911
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
411 AM CDT MON AUG 28 2017

TXC245-280930-
/O.CON.KLCH.TO.W.0079.000000T0000Z-170828T0930Z/
Jefferson TX-
411 AM CDT MON AUG 28 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 AM CDT FOR CENTRAL
JEFFERSON COUNTY...
    
At 411 AM CDT, a severe thunderstorm capable of producing a tornado
was located over Southeast Texas Regional Airport, or near Nederland,
moving north at 30 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. 

Locations impacted include...
Port Arthur and Port Acres. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to 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 2981 9409 3000 9421 3003 9406 2985 9398
TIME...MOT...LOC 0911Z 160DEG 28KT 2994 9404 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

06

819 
WWUS54 KLCH 280920
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
420 AM CDT MON AUG 28 2017

TXC245-280929-
/O.CAN.KLCH.TO.W.0079.000000T0000Z-170828T0930Z/
Jefferson TX-
420 AM CDT MON AUG 28 2017

...THE TORNADO WARNING FOR CENTRAL JEFFERSON COUNTY IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning has been cancelled.  However gusty winds are
still possible with this thunderstorm.

A tornado watch remains in effect until 100 PM CDT for southeastern
Texas.

LAT...LON 2981 9409 3000 9421 3003 9406 2985 9398
TIME...MOT...LOC 0917Z 160DEG 28KT 3000 9407 

$$

06

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 27, 7:00 PM CDT	Tornado Warning	LCH	Jefferson	30 min
Aug 27, 7:24 PM CDT	Tornado Warning	LCH	Jefferson	51 min
Aug 27, 7:41 PM CDT	Flash Flood Warning	LCH	Hardin, Jasper, Jefferson, Orange	10 hr
Aug 27, 9:54 PM CDT	Tornado Warning	LCH	Jefferson	36 min
Aug 27, 11:58 PM CDT	Flash Flood Warning	LCH	Newton, Orange	8 hr
Aug 28, 12:19 AM CDT	Tornado Warning	LCH	Jefferson, Orange	26 min
Aug 28, 12:49 AM CDT	Special Weather Statement	LCH	Orange	41 min
Aug 28, 4:55 AM CDT	Special Weather Statement	LCH	Orange	50 min
Aug 28, 5:00 AM CDT	Coastal Flood Advisory	LCH		9 hr
Aug 28, 5:42 AM CDT	Flash Flood Warning Emergency	LCH	Hardin, Jasper, Jefferson, Orange	12 hr
Aug 28, 7:54 AM CDT	Flash Flood Warning	LCH	Newton, Orange	11 hr
Aug 28, 8:05 AM CDT	Flash Flood Warning	LCH	Jasper, Tyler	11 hr
Aug 28, 9:18 AM CDT	River Flood Warning	LCH	Newton	10 days
Aug 28, 9:38 AM CDT	Tornado Warning	LCH	Jasper, Newton	22 min
Aug 28, 10:20 AM CDT	Tropical Storm Warning	LCH		58 hr
Aug 28, 10:31 AM CDT	River Flood Warning	LCH	Jasper, Tyler	11 days
Aug 28, 10:31 AM CDT	River Flood Warning	LCH	Hardin, Jasper	15 days
Aug 28, 2:26 PM CDT	River Flood Warning	LCH	Orange	13 days
Aug 28, 2:30 PM CDT	Tornado Warning	LCH	Jefferson	30 min
Aug 28, 3:14 PM CDT	Tornado Warning	LCH	Jefferson	31 min
Aug 28, 3:42 PM CDT	Tornado Warning	LCH	Hardin, Jefferson	33 min
Aug 28, 4:15 PM CDT	Storm Surge Watch	LCH		51 hr
Aug 28, 5:55 PM CDT	Flash Flood Warning Emergency	LCH	Hardin, Jasper, Jefferson, Newton, Orange	28 hr

Nearby

Tornado Warnings in Texas, 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.