Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 101, NWS Fort Worth, TX

April 28, 2021Denton County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Apr 28, 2021, 8:42 PM CDT for Denton County, Texas. It was in force for 63 min. 6 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
Apr 28, 2021, 8:42 PM CDT (01:42 UTC)
Expired
Apr 28, 2021, 9:45 PM CDT
In force
63 min
Issued by
NWS Fort Worth, TX
Area
Storm-based polygon
Hail
1.75 in
Wind
60.0 mph

County Denton County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 58 km from the middle of the area, began a volume at 01:44 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
Apr 28, 8:46 PM CDTHAIL 1.751 Se Trophy Club, TXGOLF BALL HAIL REPORTED IN TROPHY CLUB.
Apr 28, 8:54 PM CDTHAIL 1.5Flower Mound, TX1.5 INCH HAIL REPORTED NEAR WELLINGTON ELEMENTARY IN FLOWER MOUND VIA SOCIAL MEDIA.
Apr 28, 8:58 PM CDTHAIL 1.251 S Bartonville, TXDELAYED REPORT - HALF DOLLAR SIZE HAIL REPORTED 1 S OF BARTONVILLE IN DENTON CO.
Apr 28, 9:01 PM CDTHAIL 1.52 E Trophy Club, TXPING PONG BALL REPORTED IN FLOWER MOUND.
Apr 28, 9:03 PM CDTHAIL 1.51 N Flower Mound, TX1.5 INCH HAIL 1 N OF DOWNTOWN FLOWER MOUND.
Apr 28, 9:05 PM CDTHAIL 11 Nw Lewisville, TXQUARTER SIZE HAIL AND 40 KT WINDS MEASURED IN LEWISVILLE.

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
Apr 28, 7:55 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 1.7 hours before the alert went out and 34 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, Fort Worth, TX at 00:00Z on 2021-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1526 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, Fort Worth, TX at 00:00Z on 2021-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 191 square meters per square second.1939587897Sfc1 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
1526 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
1058 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
191 m²/s²
0-3 km storm-relative helicity
154 m²/s²
Significant tornado parameter
2.2
Supercell composite
9.4

Open this sounding in Storm Lab

The text

As transmitted.

997 
WUUS54 KFWD 290142
SVRFWD
TXC121-290245-
/O.NEW.KFWD.SV.W.0101.210429T0142Z-210429T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Fort Worth TX
842 PM CDT Wed Apr 28 2021

The National Weather Service in Fort Worth has issued a

* Severe Thunderstorm Warning for...
  Southern Denton County in north central Texas...

* Until 945 PM CDT.

* At 842 PM CDT, a severe thunderstorm was located over Southlake,
  moving east at 25 mph.

  HAZARD...Golf ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

This includes the following highways...
 Interstate 35W between mile markers 70 and 78.
 Interstate 35E between mile markers 446 and 460.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 200 AM CDT for north central
Texas.

This storm has a history of producing large hail. SEEK SHELTER NOW
inside a sturdy structure and stay away from windows!

&&

LAT...LON 3299 9684 3298 9711 3299 9729 3311 9729
      3321 9684
TIME...MOT...LOC 0142Z 248DEG 23KT 3296 9717 

HAIL...1.75IN
WIND...60MPH
$$

Dunn
3 follow-up statements
361 
WWUS54 KFWD 290159
SVSFWD

Severe Weather Statement
National Weather Service Fort Worth TX
859 PM CDT Wed Apr 28 2021

TXC121-290245-
/O.CON.KFWD.SV.W.0101.000000T0000Z-210429T0245Z/
Denton TX-
859 PM CDT Wed Apr 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM CDT
FOR SOUTHEASTERN DENTON COUNTY...

At 858 PM CDT, a severe thunderstorm was located over Flower Mound, 
moving northeast at 25 mph.  This storm has produced golf ball size 
hail throughout northern Tarrant County over the last hour.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

A Tornado Watch remains in effect until 200 AM CDT for north central
Texas.

LAT...LON 3299 9684 3298 9713 3298 9717 3314 9717
      3321 9684
TIME...MOT...LOC 0158Z 243DEG 24KT 3304 9706 

HAIL...1.75IN
WIND...60MPH
 
$$

Dunn
351 
WWUS54 KFWD 290212
SVSFWD

Severe Weather Statement
National Weather Service Fort Worth TX
912 PM CDT Wed Apr 28 2021

TXC121-290245-
/O.CON.KFWD.SV.W.0101.000000T0000Z-210429T0245Z/
Denton TX-
912 PM CDT Wed Apr 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM CDT
FOR SOUTHEASTERN DENTON COUNTY...

At 912 PM CDT, a severe thunderstorm was located over Lewisville,
moving northeast at 25 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

A Tornado Watch remains in effect until 200 AM CDT for north central
Texas.

LAT...LON 3303 9684 3300 9706 3316 9706 3321 9684
TIME...MOT...LOC 0212Z 244DEG 22KT 3305 9698 

HAIL...1.50IN
WIND...60MPH
 
$$

Dunn
511 
WWUS54 KFWD 290238
SVSFWD

Severe Weather Statement
National Weather Service Fort Worth TX
938 PM CDT Wed Apr 28 2021

TXC121-290248-
/O.EXP.KFWD.SV.W.0101.000000T0000Z-210429T0245Z/
Denton TX-
938 PM CDT Wed Apr 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DENTON COUNTY
WILL EXPIRE AT 945 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire. Small hail and 
gusty winds are still possible with this thunderstorm.

A Tornado Watch remains in effect until 200 AM CDT for north central
Texas.

LAT...LON 3303 9684 3300 9706 3316 9706 3321 9684
TIME...MOT...LOC 0238Z 248DEG 23KT 3310 9682 

$$

Dunn

The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 28, 7:08 PM CDTSevere Thunderstorm WarningFWDParker52 min
Apr 28, 7:30 PM CDTSevere Thunderstorm WarningFWDComanche, Erath31 min
Apr 28, 7:47 PM CDTSevere Thunderstorm WarningFWDTarrant73 min
Apr 28, 8:10 PM CDTTornado WarningFWDTarrant33 min
Apr 28, 9:06 PM CDTSevere Thunderstorm WarningFWDYoung54 min
Apr 28, 9:16 PM CDTSevere Thunderstorm WarningFWDDelta, Hopkins, Lamar39 min
Apr 28, 9:20 PM CDTSevere Thunderstorm WarningFWDCollin55 min
Apr 28, 10:01 PM CDTSevere Thunderstorm WarningFWDComanche59 min
Apr 28, 10:07 PM CDTSevere Thunderstorm WarningFWDMills53 min
Apr 28, 10:50 PM CDTSevere Thunderstorm WarningFWDErath55 min
Apr 29, 1:32 AM CDTFlash Flood WarningFWDEllis, Johnson3 hr
Apr 29, 1:35 AM CDTRiver Flood WarningFWDEllis, Navarro3 days
Apr 29, 3:09 AM CDTAreal Flood AdvisoryFWDDallas111 min
Apr 29, 3:22 AM CDTAreal Flood AdvisoryFWDEllis98 min
Apr 29, 4:59 AM CDTAreal Flood WarningFWDEllis, Hill, Johnson3 hr
Apr 29, 5:41 AM CDTRiver Flood WarningFWDDallas4 hr
Apr 29, 8:12 AM CDTRiver Flood WarningFWDCollin25 hr
Apr 29, 8:18 AM CDTRiver Flood WarningFWDCollin25 hr
Apr 29, 9:33 AM CDTRiver Flood WarningFWDDelta, Hopkins28 hr
Apr 29, 1:43 PM CDTRiver Flood WarningFWDDenton22 hr
Apr 29, 5:57 PM CDTSpecial Weather StatementFWDRains33 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.