Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 182, NWS Shreveport, LA

July 12, 2021Wood County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at Jul 12, 2021, 2:37 PM CDT for Wood 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: Jul 12, 2021, 2:37 PM CDT (19:37 UTC)
Expired: Jul 12, 2021, 3:20 PM CDT
In force: 43 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Wood County, TX

The radar

The Shreveport radar (KSHV), 163 km from the middle of the area, began a volume at 19:36 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
Jul 12, 3:15 PM CDT	TSTM WND DMG	1 Sse Quitman, TX	A LARGE TREE BRANCH WAS BLOWN DOWN BLOCKING FM 778 JUST SOUTHEAST OF QUITMAN.

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

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 7.6 hours before the alert went out and 163 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: 373 J/kg
Mixed-layer CIN: -177 J/kg
Mixed-layer LCL: 1322 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

618 
WUUS54 KSHV 121937
SVRSHV
TXC499-122030-
/O.NEW.KSHV.SV.W.0182.210712T1937Z-210712T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
237 PM CDT Mon Jul 12 2021

The National Weather Service in Shreveport has issued a

* Severe Thunderstorm Warning for...
  Southwestern Wood County in northeastern Texas...

* Until 330 PM CDT.

* At 237 PM CDT, a severe thunderstorm was located near Golden, or 12
  miles northwest of Mineola, moving east at 20 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Mineola, Quitman, Golden, Hoard, Forest Hill and Alba. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3285 9540 3261 9540 3265 9554 3267 9557
      3267 9558 3268 9558 3268 9559 3269 9559
      3271 9561 3271 9562 3272 9564 3286 9565
TIME...MOT...LOC 1937Z 275DEG 19KT 3277 9566 

HAIL...0.75IN
WIND...60MPH
 
$$

13

1 follow-up statement

180 
WWUS54 KSHV 122020
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
320 PM CDT Mon Jul 12 2021

TXC499-122029-
/O.CAN.KSHV.SV.W.0182.000000T0000Z-210712T2030Z/
Wood TX-
320 PM CDT Mon Jul 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WOOD COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However heavy rain is
still possible with this thunderstorm.

LAT...LON 3285 9540 3261 9540 3265 9554 3267 9557
      3267 9558 3268 9558 3268 9559 3269 9559
      3271 9561 3271 9562 3272 9564 3286 9565
TIME...MOT...LOC 2017Z 275DEG 19KT 3275 9540 

$$

15

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 7:23 PM CDT	Special Weather Statement	SHV	Rusk	52 min
Jul 11, 8:25 PM CDT	Areal Flood Advisory	SHV	Rusk	110 min
Jul 11, 8:31 PM CDT	Special Weather Statement	SHV	Rusk	44 min
Jul 11, 8:40 PM CDT	Special Weather Statement	SHV	Cherokee	50 min
Jul 11, 9:10 PM CDT	Flash Flood Warning Considerable damage threat	SHV	Cherokee, Panola, Rusk, Shelby, Smith	3 hr
Jul 11, 9:49 PM CDT	Special Weather Statement	SHV	Cherokee	41 min
Jul 11, 10:27 PM CDT	Special Weather Statement	SHV	Nacogdoches	48 min
Jul 11, 10:50 PM CDT	Special Weather Statement	SHV	Smith	40 min
Jul 11, 11:12 PM CDT	Special Weather Statement	SHV	Smith	48 min
Jul 11, 11:15 PM CDT	Special Weather Statement	SHV	Gregg	45 min
Jul 12, 12:13 AM CDT	Flash Flood Warning	SHV	Cherokee, Rusk, Smith	4 hr
Jul 12, 2:10 AM CDT	Areal Flood Advisory	SHV	Cherokee, Nacogdoches	3 hr
Jul 12, 6:28 AM CDT	River Flood Warning	SHV	Anderson, Cherokee, Houston, Trinity	21 days
Jul 12, 6:28 AM CDT	River Flood Warning	SHV	Nacogdoches, Rusk	25 hr
Jul 12, 8:20 AM CDT	River Flood Warning	SHV	Angelina, Houston, Polk, Trinity, Tyler	11 days
Jul 12, 1:56 PM CDT	Special Weather Statement	SHV	Wood	49 min

Nearby

Severe Thunderstorm Warnings in Texas, 2021 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.