Alert archive / Texas / Tornado Warnings in 2018

Tornado Warning 2, NWS Shreveport, LA

January 21, 2018Wood County, Texas

NWS Shreveport, LA issued this tornado warning at Jan 21, 2018, 8:13 PM CST for Wood County, Texas. It was in force for 32 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: Jan 21, 2018, 8:13 PM CST (02:13 UTC)
Expired: Jan 21, 2018, 8:45 PM CST
In force: 32 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Wood County, TX

The radar

The Shreveport radar (KSHV), 159 km from the middle of the area, began a volume at 02:16 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
Jan 21, 3:05 PM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Shreveport, LA (KBAD), launched 00:00Z, 2.2 hours before the alert went out and 167 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: 39 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 970 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 221 m²/s²
0-3 km storm-relative helicity: 261 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

484 
WFUS54 KSHV 220213
TORSHV
TXC499-220245-
/O.NEW.KSHV.TO.W.0002.180122T0213Z-180122T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Shreveport LA
813 PM CST SUN JAN 21 2018

The National Weather Service in Shreveport has issued a

* Tornado Warning for...
  North central Wood County in northeastern Texas...

* Until 845 PM CST
    
* At 813 PM CST, a severe thunderstorm capable of producing a tornado
  was located over Pleasant Grove, or 8 miles southwest of Winnsboro,
  moving northeast 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. 

* Locations impacted include...
  Winnsboro and Pleasant Grove. 

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 3291 9556 3296 9551 3296 9531 3295 9531
      3283 9546
TIME...MOT...LOC 0213Z 222DEG 25KT 3290 9543 

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

$$

09

1 follow-up statement

509 
WWUS54 KSHV 220237
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
837 PM CST SUN JAN 21 2018

TXC499-220246-
/O.EXP.KSHV.TO.W.0002.000000T0000Z-180122T0245Z/
Wood TX-
837 PM CST SUN JAN 21 2018

...THE TORNADO WARNING FOR NORTH CENTRAL WOOD COUNTY WILL EXPIRE AT
845 PM CST...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

A tornado watch remains in effect until 1100 PM CST for northeastern
Texas.

LAT...LON 3291 9556 3296 9551 3296 9531 3295 9531
      3283 9546
TIME...MOT...LOC 0236Z 222DEG 25KT 3302 9530 

$$

09

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 21, 7:45 PM CST	Tornado Warning	SHV	Wood	30 min
Jan 21, 8:06 PM CST	Severe Thunderstorm Warning	SHV	Red River	24 min
Jan 21, 8:24 PM CST	Tornado Warning	SHV	Franklin, Titus, Wood	36 min
Jan 21, 8:47 PM CST	Tornado Warning Tornado observed	SHV	Franklin, Morris, Red River, Titus	43 min
Jan 21, 9:17 PM CST	Tornado Warning	SHV	Bowie, Red River	43 min
Jan 21, 9:44 PM CST	Tornado Warning	SHV	Bowie	46 min
Jan 21, 9:56 PM CST	Special Weather Statement	SHV	Red River, Titus	49 min
Jan 21, 10:00 PM CST	Special Weather Statement	SHV	Gregg	30 min
Jan 21, 10:41 PM CST	Special Weather Statement	SHV	Bowie	49 min
Jan 21, 10:43 PM CST	Severe Thunderstorm Warning	SHV	Sabine, San Augustine	47 min
Jan 21, 10:54 PM CST	Tornado Warning	SHV	Sabine, San Augustine, Shelby	33 min
Jan 21, 11:09 PM CST	Tornado Warning	SHV	Cherokee, Rusk, Smith	51 min
Jan 21, 11:44 PM CST	Tornado Warning	SHV	Gregg, Harrison, Panola, Rusk	28 min
Jan 22, 3:25 AM CST	Lake Wind Advisory	SHV	Bowie, Camp, Cass, Cherokee, Franklin, Gregg and 12 more	15 hr

Nearby

Tornado Warnings in Texas, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.