Alert archive / Texas / Tornado Warnings in 2017

Tornado Warning 86, NWS Shreveport, LA

August 26, 2017Angelina County, Texas

NWS Shreveport, LA issued this tornado warning at Aug 26, 2017, 3:31 PM CDT for Angelina County, Texas. It was in force for 44 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 26, 2017, 3:31 PM CDT (20:31 UTC)
Expired: Aug 26, 2017, 4:15 PM CDT
In force: 44 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Angelina County, TX

The radar

The Ft Polk radar (KPOE), 141 km from the middle of the area, began a volume at 20:30 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 nearest sounding before it

Shreveport, LA (KBAD), launched 12:00Z, 8.5 hours before the alert went out and 156 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.

562 
WFUS54 KSHV 262031
TORSHV
TXC005-262115-
/O.NEW.KSHV.TO.W.0086.170826T2031Z-170826T2115Z/

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

The National Weather Service in Shreveport has issued a

* Tornado Warning for...
  Central Angelina County in eastern Texas...

* Until 415 PM CDT
    
* At 330 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 10 miles southeast of Huntington, or 13 miles north of
  Rockland, 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...
  Huntington around 355 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Zavalla, Shawnee and Homer.

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 3117 9434 3112 9445 3127 9467 3135 9450
TIME...MOT...LOC 2030Z 145DEG 22KT 3118 9445 

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

$$

13

1 follow-up statement

042 
WWUS54 KSHV 262055
SVSSHV

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

TXC005-262115-
/O.CON.KSHV.TO.W.0086.000000T0000Z-170826T2115Z/
Angelina TX-
355 PM CDT SAT AUG 26 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM CDT FOR CENTRAL
ANGELINA COUNTY...
    
At 355 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Huntington, or 13 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...
  Huntington around 405 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Shawnee and Homer.

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!

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 3125 9446 3122 9452 3127 9467 3135 9450
TIME...MOT...LOC 2055Z 145DEG 20KT 3127 9452 

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, 4:02 PM CDT	Tornado Warning	SHV	Angelina, Nacogdoches	43 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.