Alert archive / Texas / Tornado Warnings in 2017

Tornado Warning 5, NWS Lake Charles, LA

January 20, 2017Jefferson County, Texas

NWS Lake Charles, LA issued this tornado warning at Jan 20, 2017, 7:48 PM CST for Jefferson County, Texas. It was in force for 27 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jan 20, 2017, 7:48 PM CST (01:48 UTC)
Expired: Jan 20, 2017, 8:15 PM CST
In force: 27 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Jefferson County, TX

The radar

The Houston radar (KHGX), 97 km from the middle of the area, began a volume at 01:47 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.

What was reported inside it

Time	Report	Where	Remark
Jan 20, 8:05 PM CST	TSTM WND GST 70	Beaumont, TX	ASSOCIATED WITH WALL CLOUD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jan 20, 7:32 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 1.8 hours before the alert went out and 108 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: 627 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 842 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 156 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

374 
WFUS54 KLCH 210148
TORLCH
TXC245-210215-
/O.NEW.KLCH.TO.W.0005.170121T0148Z-170121T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Lake Charles LA
748 PM CST FRI JAN 20 2017

The National Weather Service in Lake Charles has issued a

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

* Until 815 PM CST
    
* At 748 PM CST, a severe thunderstorm capable of producing a tornado
  was located near China, or near Nome, 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
  northwestern 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 3011 9435 3010 9434 3012 9431 3012 9430
      3015 9427 3018 9421 2995 9401 2988 9436
      2989 9436 2989 9438 2997 9445 3005 9444
TIME...MOT...LOC 0148Z 234DEG 30KT 3001 9436 

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

$$

24

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 20, 7:11 PM CST	Special Weather Statement	LCH	Jefferson	34 min
Jan 20, 7:16 PM CST	Severe Thunderstorm Warning	LCH	Hardin, Jefferson, Orange	29 min
Jan 20, 7:27 PM CST	Special Weather Statement	LCH	Hardin	33 min
Jan 20, 7:40 PM CST	Severe Thunderstorm Warning	LCH	Hardin, Jasper, Jefferson, Newton, Orange	35 min
Jan 20, 7:41 PM CST	Severe Thunderstorm Warning	LCH	Hardin, Jefferson	34 min
Jan 20, 7:49 PM CST	Areal Flood Advisory	LCH	Hardin, Jasper, Jefferson, Newton, Orange	116 min
Jan 20, 8:03 PM CST	Severe Thunderstorm Warning	LCH	Jasper, Newton	42 min
Jan 20, 8:08 PM CST	Severe Thunderstorm Warning	LCH	Hardin, Jefferson, Orange	37 min
Jan 20, 8:15 PM CST	Tornado Warning	LCH	Jefferson, Orange	30 min
Jan 20, 8:32 PM CST	Tornado Warning	LCH	Jasper, Newton, Orange	28 min
Jan 20, 8:43 PM CST	River Flood Warning	LCH	Hardin, Jefferson	6 days
Jan 20, 11:42 PM CST	Special Weather Statement	LCH	Hardin, Jasper, Tyler	33 min
Jan 21, 12:23 AM CST	Special Weather Statement	LCH	Hardin, Jasper, Newton	52 min
Jan 21, 12:53 AM CST	Severe Thunderstorm Warning	LCH	Newton	67 min
Jan 21, 1:38 PM CST	Wind Advisory	LCH	Hardin, Jasper, Newton, Tyler	34 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.