Alert archive / Texas / Tornado Warnings in 2017

Tornado Warning 87, NWS Shreveport, LA

August 26, 2017Angelina County, Nacogdoches County, Texas

NWS Shreveport, LA issued this tornado warning at Aug 26, 2017, 4:02 PM CDT for Angelina County, Nacogdoches County, Texas. It was in force for 43 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: Aug 26, 2017, 4:02 PM CDT (21:02 UTC)
Expired: Aug 26, 2017, 4:45 PM CDT
In force: 43 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Angelina County, TX, Nacogdoches County, TX

The radar

The Shreveport radar (KSHV), 141 km from the middle of the area, began a volume at 21:01 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
Aug 26, 4:30 PM CDT	TSTM WND DMG	7 Ne Lufkin, TX	PUBLIC REPORTS TREES DOWN AND DEBRIS IN THE MOFFITT COMMUNITY VIA KTRE FACEBOOK PAGE.

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

The nearest sounding before it

Shreveport, LA (KBAD), launched 12:00Z, 9.0 hours before the alert went out and 148 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: 9 J/kg
Mixed-layer CIN: -197 J/kg
Mixed-layer LCL: 1191 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 55 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

428 
WFUS54 KSHV 262102
TORSHV
TXC005-347-262145-
/O.NEW.KSHV.TO.W.0087.170826T2102Z-170826T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Shreveport LA
402 PM CDT SAT AUG 26 2017

The National Weather Service in Shreveport has issued a

* Tornado Warning for...
  Central Nacogdoches County in eastern Texas...
  North central Angelina County in eastern Texas...

* Until 445 PM CDT
    
* At 402 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Huntington, or 11 miles east of Lufkin, moving
  northwest at 25 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...
  Lufkin around 430 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Redland.

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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Shreveport.

&&

LAT...LON 3127 9447 3124 9453 3143 9478 3153 9460
TIME...MOT...LOC 2102Z 145DEG 20KT 3130 9453 

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

$$

13

2 follow-up statements

790 
WWUS54 KSHV 262120
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
420 PM CDT SAT AUG 26 2017

TXC005-347-262145-
/O.CON.KSHV.TO.W.0087.000000T0000Z-170826T2145Z/
Nacogdoches TX-Angelina TX-
420 PM CDT SAT AUG 26 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR CENTRAL
NACOGDOCHES AND NORTH CENTRAL ANGELINA COUNTIES...
    
At 420 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Huntington, or 8 miles east of Lufkin, moving
northwest at 20 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 Nacogdoches and north central Angelina Counties, including
the following locations: Redland.

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 3135 9452 3131 9459 3143 9478 3153 9460
TIME...MOT...LOC 2120Z 140DEG 16KT 3136 9459 

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

$$

13

897 
WWUS54 KSHV 262133 RRA
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
433 PM CDT SAT AUG 26 2017

TXC005-347-262145-
/O.CON.KSHV.TO.W.0087.000000T0000Z-170826T2145Z/
Nacogdoches TX-Angelina TX-
433 PM CDT SAT AUG 26 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR CENTRAL
NACOGDOCHES AND NORTH CENTRAL ANGELINA COUNTIES...
    
At 433 PM CDT, a severe thunderstorm capable of producing a tornado
was located 7 miles northeast of Lufkin, moving northwest at 15 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...
Redland.

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 3139 9455 3136 9462 3143 9478 3153 9460
TIME...MOT...LOC 2133Z 147DEG 14KT 3139 9461 

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

$$

13

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 26, 3:31 PM CDT	Tornado Warning	SHV	Angelina	44 min
Aug 26, 4:07 PM CDT	Tornado Warning	SHV	Angelina	31 min

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.