Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 111, NWS Shreveport, LA

May 4, 20214 counties in Texas

NWS Shreveport, LA issued this severe thunderstorm warning at May 4, 2021, 1:10 AM CDT for 4 counties in Texas. It was in force for 50 min. 2 reports 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
May 4, 2021, 1:10 AM CDT (06:10 UTC)
Expired
May 4, 2021, 2:00 AM CDT
In force
50 min
Issued by
NWS Shreveport, LA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Gregg County, TX, Smith County, TX, Upshur County, TX, Wood County, TX

The radar

The Shreveport radar (KSHV), 142 km from the middle of the area, began a volume at 06:09 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

TimeReportWhereRemark
May 4, 1:10 AM CDTHAIL 0.887 Wsw Lindale, TXMEDIA REPORTS NICKEL SIZED HAIL IN THE AREA OF CARROLL.
May 4, 1:42 AM CDTTSTM WND DMGMineola, TX10 TREES AND POWER LINES DOWNED IN THE CENTRAL AND SOUTHERN PART OF THE COUNTY.

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

The watch it was issued in

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

IssuedProductOfficeLasted
May 3, 9:10 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 6.2 hours before the alert went out and 150 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-pSkew-T log-p diagram, Shreveport, LA at 00:00Z on 2021-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2938 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 00:00Z on 2021-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
2938 J/kg
Mixed-layer CIN
-99 J/kg
Mixed-layer LCL
1253 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
101 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.5

Open this sounding in Storm Lab

The text

As transmitted.

422 
WUUS54 KSHV 040610
SVRSHV
TXC183-423-459-499-040700-
/O.NEW.KSHV.SV.W.0111.210504T0610Z-210504T0700Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
110 AM CDT Tue May 4 2021

The National Weather Service in Shreveport has issued a

* Severe Thunderstorm Warning for...
  Central Smith County in northeastern Texas...
  Southern Wood County in northeastern Texas...
  Upshur County in northeastern Texas...
  Southwestern Gregg County in northeastern Texas...

* Until 200 AM CDT.

* At 110 AM CDT, a severe thunderstorm was located near Edom, or 15
  miles south of Mineola, moving northeast at 60 mph. Another severe 
  thunderstorm was indicated just northwest of Van, almost moving northeast 
  near 60 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...
  Tyler, Longview, Kilgore, White Oak, Gladewater, Gilmer, Mineola,
  Lindale, Quitman, Big Sandy, Hawkins, Clarksville City, East
  Mountain, Hainesville, Golden, Rosewood, Hoard, Liberty City, West
  Mountain and Winona.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3290 9523 3290 9483 3242 9483 3231 9545
      3237 9545 3237 9547 3242 9551 3248 9559
      3269 9559 3271 9561
TIME...MOT...LOC 0609Z 241DEG 54KT 3244 9555 

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

15
2 follow-up statements
575 
WWUS54 KSHV 040645
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
145 AM CDT Tue May 4 2021

TXC423-499-040654-
/O.CAN.KSHV.SV.W.0111.000000T0000Z-210504T0700Z/
Smith TX-Wood TX-
145 AM CDT Tue May 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SMITH AND SOUTHERN
WOOD COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
northeastern Texas.

LAT...LON 3274 9515 3283 9483 3255 9483 3255 9508
      3256 9509 3255 9510 3255 9514 3257 9515
TIME...MOT...LOC 0644Z 247DEG 46KT 3260 9505 

$$

TXC183-459-040700-
/O.CON.KSHV.SV.W.0111.000000T0000Z-210504T0700Z/
Upshur TX-Gregg TX-
145 AM CDT Tue May 4 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 AM CDT
FOR WESTERN UPSHUR AND WEST CENTRAL GREGG COUNTIES...

At 145 AM CDT, a severe thunderstorm was located near Big Sandy, or 7
miles northwest of Gladewater, moving east at 55 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, White Oak, Gladewater, Gilmer, Big Sandy, Clarksville City,
East Mountain, Rosewood, West Mountain, Union Grove, Warren City and
Pritchett.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3274 9515 3283 9483 3255 9483 3255 9508
      3256 9509 3255 9510 3255 9514 3257 9515
TIME...MOT...LOC 0644Z 247DEG 46KT 3260 9505 

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

15
837 
WWUS54 KSHV 040657
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
157 AM CDT Tue May 4 2021

TXC183-459-040707-
/O.EXP.KSHV.SV.W.0111.000000T0000Z-210504T0700Z/
Upshur TX-Gregg TX-
157 AM CDT Tue May 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN UPSHUR AND WEST
CENTRAL GREGG COUNTIES WILL EXPIRE AT 200 AM CDT...
                
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 will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
northeastern Texas.

LAT...LON 3274 9515 3283 9483 3255 9483 3255 9508
      3256 9509 3255 9510 3255 9514 3257 9515
TIME...MOT...LOC 0657Z 241DEG 54KT 3269 9485 

$$

15

The office that day

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

IssuedProductOfficeCountiesLasted
May 3, 10:55 PM CDTSevere Thunderstorm WarningSHVCamp, Franklin, Red River, Smith, Titus, Upshur and 1 more65 min
May 3, 11:44 PM CDTSevere Thunderstorm WarningSHVBowie, Camp, Cass, Marion, Morris, Red River and 2 more61 min
May 4, 12:34 AM CDTSevere Thunderstorm WarningSHVBowie41 min
May 4, 4:54 AM CDTSpecial Weather StatementSHVGregg, Harrison51 min
May 4, 5:13 AM CDTSpecial Weather StatementSHVRusk32 min
May 4, 10:15 AM CDTSpecial Weather StatementSHVAngelina, Nacogdoches45 min
May 4, 10:15 AM CDTSpecial Weather StatementSHVHarrison30 min
May 4, 10:40 AM CDTSpecial Weather StatementSHVNacogdoches, San Augustine, Shelby50 min
May 4, 11:07 AM CDTSevere Thunderstorm WarningSHVPanola, Shelby38 min

Nearby

Severe Thunderstorm Warnings in Texas, 2021Every 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.