Alert archive / Texas / Tornado Warnings in 2021

Tornado Warning 32, NWS Shreveport, LA

October 27, 2021Harrison County, Texas

NWS Shreveport, LA issued this tornado warning at Oct 27, 2021, 10:01 AM CDT for Harrison County, Texas. It was in force for 29 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: Oct 27, 2021, 10:01 AM CDT (15:01 UTC)
Expired: Oct 27, 2021, 10:30 AM CDT
In force: 29 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Harrison County, TX

The radar

The Shreveport radar (KSHV), 56 km from the middle of the area, began a volume at 15:01 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.

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 3.0 hours before the alert went out and 65 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: 395 J/kg
Mixed-layer CIN: -87 J/kg
Mixed-layer LCL: 557 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 233 m²/s²
0-3 km storm-relative helicity: 175 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

As transmitted.

493 
WFUS54 KSHV 271501
TORSHV
TXC203-271530-
/O.NEW.KSHV.TO.W.0032.211027T1501Z-211027T1530Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Shreveport LA
1001 AM CDT Wed Oct 27 2021

The National Weather Service in Shreveport has issued a

* Tornado Warning for...
  Central Harrison County in northeastern Texas...

* Until 1030 AM CDT.
    
* At 1001 AM CDT, a severe thunderstorm capable of producing a
  tornado was located near Hallsville, or 11 miles southwest of
  Marshall, moving northeast at 35 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...
  Marshall around 1030 AM CDT.

Other locations impacted by this tornadic thunderstorm include
Scottsville and Nesbitt.

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 3240 9454 3251 9460 3264 9430 3249 9422
TIME...MOT...LOC 1501Z 246DEG 30KT 3247 9452 

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

$$

19

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 27, 7:19 AM CDT	Special Weather Statement	SHV	Smith, Wood	26 min
Oct 27, 8:38 AM CDT	Special Weather Statement	SHV	Angelina, Nacogdoches	52 min
Oct 27, 9:24 AM CDT	Special Weather Statement	SHV	Rusk	36 min
Oct 27, 9:31 AM CDT	Special Weather Statement	SHV	Angelina, Nacogdoches, San Augustine, Shelby	59 min
Oct 27, 9:41 AM CDT	Special Weather Statement	SHV	Cass, Gregg, Harrison, Marion, Morris, Titus	64 min
Oct 27, 9:53 AM CDT	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Panola, Rusk	52 min
Oct 27, 10:08 AM CDT	Special Weather Statement	SHV	Panola	67 min
Oct 27, 10:28 AM CDT	Special Weather Statement	SHV	Sabine, San Augustine, Shelby	62 min
Oct 27, 10:44 AM CDT	Severe Thunderstorm Warning	SHV	Cass, Harrison, Marion, Panola	46 min
Oct 27, 10:47 AM CDT	Special Weather Statement	SHV	Bowie, Cass	58 min
Oct 27, 11:06 AM CDT	Severe Thunderstorm Warning	SHV	Shelby	39 min
Oct 27, 3:07 PM CDT	Lake Wind Advisory	SHV	Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 15 more	52 hr
Oct 27, 3:07 PM CDT	Wind Advisory	SHV	Angelina, Camp, Cherokee, Franklin, Gregg, Morris and 7 more	28 hr

Nearby

Tornado Warnings in Texas, 2021 Every tornado warning in 2021 Tornadoes in 2021

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.