Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 151, NWS Shreveport, LA

May 11, 20217 counties in Texas

NWS Shreveport, LA issued this severe thunderstorm warning at May 11, 2021, 3:59 PM CDT for 7 counties in Texas. It was in force for 61 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: May 11, 2021, 3:59 PM CDT (20:59 UTC)
Expired: May 11, 2021, 5:00 PM CDT
In force: 61 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cherokee County, TX, Gregg County, TX, Harrison County, TX, Nacogdoches County, TX, Panola County, TX, Rusk County, TX, Shelby County, TX

The radar

The Shreveport radar (KSHV), 67 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 11, 3:04 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 9.0 hours before the alert went out and 76 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 605 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 438 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.4

Open this sounding in Storm Lab

The text

As transmitted.

376 
WUUS54 KSHV 112059
SVRSHV
TXC073-183-203-347-365-401-419-112200-
/O.NEW.KSHV.SV.W.0151.210511T2059Z-210511T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
359 PM CDT Tue May 11 2021

The National Weather Service in Shreveport has issued a

* Severe Thunderstorm Warning for...
  Harrison County in northeastern Texas...
  Panola County in northeastern Texas...
  Rusk County in northeastern Texas...
  Northwestern Nacogdoches County in eastern Texas...
  Northwestern Shelby County in eastern Texas...
  Eastern Gregg County in northeastern Texas...
  Central Cherokee County in northeastern Texas...

* Until 500 PM CDT.

* At 359 PM CDT, severe thunderstorms were located along a line
  extending from near Hallsville to near Tatum to near Henderson to
  New Salem to near Rusk, moving east at 40 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Longview, Marshall, Henderson, Kilgore, Carthage, Rusk, Hallsville,
  Waskom, Tatum, Tenaha, Timpson, Garrison, Beckville, Deberry,
  Elysian Fields, Pinehill, Sacul, Maydelle, Ponta and New Salem.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3266 9409 3249 9407 3233 9409 3215 9415
      3194 9425 3177 9440 3178 9536 3200 9510
      3217 9494 3237 9483 3259 9475
TIME...MOT...LOC 2059Z 250DEG 34KT 3252 9448 3231 9461 3211 9477 3192
9495 3172 9516

HAIL...1.00IN
WIND...60MPH
 
$$

19

2 follow-up statements

971 
WWUS54 KSHV 112123
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
423 PM CDT Tue May 11 2021

TXC073-347-112133-
/O.CAN.KSHV.SV.W.0151.000000T0000Z-210511T2200Z/
Nacogdoches TX-Cherokee TX-
423 PM CDT Tue May 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN NACOGDOCHES AND
CENTRAL CHEROKEE COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
eastern and northeastern Texas.

LAT...LON 3185 9498 3208 9478 3261 9459 3266 9409
      3249 9407 3233 9409 3215 9415 3194 9425
      3184 9434
TIME...MOT...LOC 2123Z 250DEG 34KT 3260 9423 3239 9436 3219 9452 3200
9470 3180 9491

$$

TXC183-203-365-401-419-112200-
/O.CON.KSHV.SV.W.0151.000000T0000Z-210511T2200Z/
Harrison TX-Panola TX-Rusk TX-Shelby TX-Gregg TX-
423 PM CDT Tue May 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR HARRISON...PANOLA...SOUTHEASTERN RUSK...NORTHWESTERN SHELBY AND
SOUTHEASTERN GREGG COUNTIES...

At 423 PM CDT, severe thunderstorms were located along a line
extending from 6 miles southwest of Karnack to 10 miles south of
Marshall to near Beckville to Minden to Sacul, moving east at 40 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Marshall, Carthage, Hallsville, Waskom, Tatum, Tenaha, Timpson,
Beckville, Deberry, Elysian Fields, Pinehill, Minden, Easton, Mount
Enterprise, Reklaw, Scottsville, Gary City, Nesbitt, Darco and
Fairplay.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3185 9498 3208 9478 3261 9459 3266 9409
      3249 9407 3233 9409 3215 9415 3194 9425
      3184 9434
TIME...MOT...LOC 2123Z 250DEG 34KT 3260 9423 3239 9436 3219 9452 3200
9470 3180 9491

HAIL...1.00IN
WIND...60MPH
 
$$

19

917 
WWUS54 KSHV 112148
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
448 PM CDT Tue May 11 2021

TXC183-401-112157-
/O.CAN.KSHV.SV.W.0151.000000T0000Z-210511T2200Z/
Rusk TX-Gregg TX-
448 PM CDT Tue May 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN RUSK AND
SOUTHEASTERN GREGG COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
eastern and northeastern Texas.

LAT...LON 3186 9446 3187 9446 3188 9448 3190 9448
      3192 9451 3198 9451 3242 9439 3249 9407
      3233 9409 3215 9415 3194 9425 3184 9434
      3184 9445
TIME...MOT...LOC 2147Z 270DEG 34KT 3267 9397 3246 9410 3226 9426 3207
9444 3187 9466

$$

TXC203-365-419-112200-
/O.CON.KSHV.SV.W.0151.000000T0000Z-210511T2200Z/
Harrison TX-Panola TX-Shelby TX-
448 PM CDT Tue May 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR SOUTHEASTERN HARRISON...CENTRAL PANOLA AND NORTHWESTERN SHELBY
COUNTIES...

At 447 PM CDT, severe thunderstorms were located along a line
extending from Mooringsport to near Waskom to 6 miles southwest of
Deberry to 8 miles southwest of Carthage to 8 miles northeast of
Trawick, moving east at 40 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Carthage, Waskom, Tenaha, Timpson, Deberry, Elysian Fields, Gary
City, Midyett and Woods.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3186 9446 3187 9446 3188 9448 3190 9448
      3192 9451 3198 9451 3242 9439 3249 9407
      3233 9409 3215 9415 3194 9425 3184 9434
      3184 9445
TIME...MOT...LOC 2147Z 270DEG 34KT 3267 9397 3246 9410 3226 9426 3207
9444 3187 9466

HAIL...1.00IN
WIND...60MPH
 
$$

19

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 7:47 PM CDT	River Flood Warning	SHV	Gregg	64 hr
May 10, 8:41 PM CDT	Special Weather Statement	SHV	Camp, Morris, Upshur, Wood	64 min
May 10, 9:27 PM CDT	Special Weather Statement	SHV	Harrison, Marion	48 min
May 10, 9:29 PM CDT	Severe Thunderstorm Warning	SHV	Red River	46 min
May 11, 12:57 AM CDT	Special Weather Statement	SHV	Smith	48 min
May 11, 1:12 AM CDT	Special Weather Statement	SHV	Wood	48 min
May 11, 2:04 AM CDT	Flash Flood Watch	SHV	Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 15 more	24 hr
May 11, 2:38 AM CDT	Special Weather Statement	SHV	Gregg	52 min
May 11, 3:20 AM CDT	Special Weather Statement	SHV	Harrison	40 min
May 11, 3:28 AM CDT	Areal Flood Advisory	SHV	Harrison	4 hr
May 11, 8:04 AM CDT	River Flood Warning	SHV	Anderson, Cherokee, Houston	36 days
May 11, 9:22 AM CDT	River Flood Warning	SHV	Gregg, Smith, Upshur, Wood	39 days
May 11, 9:25 AM CDT	River Flood Warning	SHV	Franklin, Morris, Red River, Titus	3 days
May 11, 9:25 AM CDT	River Flood Warning	SHV	Franklin, Morris, Titus	5 days
May 11, 11:15 AM CDT	Special Weather Statement	SHV	Cherokee	45 min
May 11, 11:59 AM CDT	Special Weather Statement	SHV	Cherokee	31 min
May 11, 12:31 PM CDT	Special Weather Statement	SHV	Cherokee	44 min
May 11, 1:32 PM CDT	Special Weather Statement	SHV	Smith	43 min
May 11, 1:34 PM CDT	Special Weather Statement	SHV	Gregg	41 min
May 11, 2:12 PM CDT	Special Weather Statement	SHV	Cass, Marion	48 min
May 11, 2:15 PM CDT	Special Weather Statement	SHV	Harrison	45 min
May 11, 2:21 PM CDT	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Rusk, Smith, Upshur	37 min
May 11, 2:50 PM CDT	Special Weather Statement	SHV	Cherokee, Smith	40 min
May 11, 2:56 PM CDT	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Panola, Rusk	17 min
May 11, 3:01 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Gregg, Rusk, Smith	48 min
May 11, 4:18 PM CDT	Severe Thunderstorm Warning	SHV	Angelina, Cherokee	42 min
May 11, 5:01 PM CDT	Special Weather Statement	SHV	Angelina	59 min
May 11, 6:00 PM CDT	Special Weather Statement	SHV	Angelina	45 min
May 11, 6:14 PM CDT	Severe Thunderstorm Warning	SHV	Angelina	28 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.