Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 46, NWS Fort Worth, TX

March 24, 2021Collin County, Denton County, Grayson County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Mar 24, 2021, 10:23 PM CDT for Collin County, Denton County, Grayson County, Texas. It was in force for 52 min. 3 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: Mar 24, 2021, 10:23 PM CDT (03:23 UTC)
Expired: Mar 24, 2021, 11:15 PM CDT
In force: 52 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Collin County, TX, Denton County, TX, Grayson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 114 km from the middle of the area, began a volume at 03:26 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
Mar 24, 10:23 PM CDT	HAIL 1.75	5 Ne Little Elm, TX
Mar 24, 10:37 PM CDT	HAIL 0.75	2 Sse Prosper, TX	REPORT FROM MPING: DIME (0.75 IN.).
Mar 24, 11:00 PM CDT	HAIL 0.75	1 E Mckinney, TX

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.

Issued	Product	Office	Lasted
Mar 24, 9:52 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 3.4 hours before the alert went out and 220 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: 1550 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 353 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

310 
WUUS54 KFWD 250323
SVRFWD
TXC085-121-181-250430-
/O.NEW.KFWD.SV.W.0046.210325T0323Z-210325T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Fort Worth TX
1023 PM CDT Wed Mar 24 2021

The National Weather Service in Fort Worth has issued a

* Severe Thunderstorm Warning for...
  East central Denton County in north central Texas...
  Northern Collin County in north central Texas...
  Southeastern Grayson County in north central Texas...

* Until 1130 PM CDT.

* At 1023 PM CDT, a severe thunderstorm was located over Frisco,
  moving northeast at 25 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...
  Plano, McKinney, Frisco, Allen, The Colony, Little Elm, Prosper,
  Anna, Fairview, Princeton, Celina, Van Alstyne, Howe, Lowry
  Crossing, Whitewright, Gunter, Bells, Tom Bean, Hackberry and
  Savoy.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 400 AM CDT for north central
Texas.

For your protection get inside a sturdy structure and stay away from
windows.

&&

LAT...LON 3362 9638 3334 9639 3335 9630 3328 9630
      3304 9685 3315 9694 3333 9693 3366 9639
TIME...MOT...LOC 0323Z 238DEG 22KT 3317 9682 

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

Bonnette

2 follow-up statements

392 
WWUS54 KFWD 250348
SVSFWD

Severe Weather Statement
National Weather Service Fort Worth TX
1048 PM CDT Wed Mar 24 2021

TXC121-250358-
/O.CAN.KFWD.SV.W.0046.000000T0000Z-210325T0430Z/
Denton TX-
1048 PM CDT Wed Mar 24 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL DENTON COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 400 AM CDT for north central
Texas.

LAT...LON 3362 9638 3334 9639 3335 9630 3328 9630
      3312 9668 3321 9680 3333 9680
TIME...MOT...LOC 0348Z 233DEG 27KT 3323 9665 

$$

TXC085-181-250430-
/O.CON.KFWD.SV.W.0046.000000T0000Z-210325T0430Z/
Collin TX-Grayson TX-
1048 PM CDT Wed Mar 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR NORTHERN COLLIN AND SOUTHEASTERN GRAYSON COUNTIES...

At 1048 PM CDT, a severe thunderstorm was located over McKinney,
moving northeast at 30 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...
McKinney, Frisco, Allen, Prosper, Anna, Fairview, Princeton, Celina,
Van Alstyne, Lowry Crossing, Whitewright, Bells, Tom Bean, Savoy,
Melissa, Blue Ridge, New Hope, Weston and Westminster.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection stay inside a sturdy structure and keep away from
windows.

&&

A Tornado Watch remains in effect until 400 AM CDT for north central
Texas.

LAT...LON 3362 9638 3334 9639 3335 9630 3328 9630
      3312 9668 3321 9680 3333 9680
TIME...MOT...LOC 0348Z 233DEG 27KT 3323 9665 

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

Bonnette

345 
WWUS54 KFWD 250415
SVSFWD

Severe Weather Statement
National Weather Service Fort Worth TX
1115 PM CDT Wed Mar 24 2021

TXC085-181-250425-
/O.CAN.KFWD.SV.W.0046.000000T0000Z-210325T0430Z/
Collin TX-Grayson TX-
1115 PM CDT Wed Mar 24 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN COLLIN AND
SOUTHEASTERN GRAYSON COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits. Therefore the warning has been cancelled. However small hail
and gusty winds are still possible with this thunderstorm.

A Tornado Watch remains in effect until 400 AM CDT for north central
Texas.

LAT...LON 3362 9638 3334 9639 3335 9630 3328 9630
      3312 9668 3321 9680 3333 9680
TIME...MOT...LOC 0414Z 238DEG 22KT 3332 9648 

$$

Bonnette

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 24, 7:08 PM CDT	Tornado Warning Tornado observed	FWD	Bosque, Hamilton	52 min
Mar 24, 7:25 PM CDT	Severe Thunderstorm Warning	FWD	Hopkins	40 min
Mar 24, 7:33 PM CDT	Severe Thunderstorm Warning	FWD	Comanche	57 min
Mar 24, 7:47 PM CDT	Severe Thunderstorm Warning	FWD	Bosque, Hill	58 min
Mar 24, 7:55 PM CDT	Tornado Warning	FWD	Bosque, Hill	50 min
Mar 24, 8:25 PM CDT	Severe Thunderstorm Warning	FWD	Jack, Young	40 min
Mar 24, 8:39 PM CDT	Severe Thunderstorm Warning	FWD	Ellis, Hill, Johnson	66 min
Mar 24, 8:40 PM CDT	Severe Thunderstorm Warning	FWD	Denton, Parker, Tarrant, Wise	65 min
Mar 24, 8:43 PM CDT	River Flood Warning	FWD	Hunt	36 hr
Mar 24, 8:44 PM CDT	River Flood Warning	FWD	Hunt, Kaufman, Rockwall	37 hr
Mar 24, 8:48 PM CDT	Severe Thunderstorm Warning	FWD	Jack, Wise	42 min
Mar 24, 9:12 PM CDT	Severe Thunderstorm Warning	FWD	Cooke, Montague	51 min
Mar 24, 9:29 PM CDT	Severe Thunderstorm Warning	FWD	Denton	61 min
Mar 24, 9:37 PM CDT	Tornado Warning	FWD	Denton	32 min
Mar 24, 9:40 PM CDT	Severe Thunderstorm Warning	FWD	Ellis	65 min
Mar 24, 10:46 PM CDT	Severe Thunderstorm Warning	FWD	Ellis, Kaufman	59 min
Mar 24, 11:09 PM CDT	Severe Thunderstorm Warning	FWD	Hamilton, Lampasas, Mills	39 min
Mar 24, 11:44 PM CDT	Severe Thunderstorm Warning	FWD	Kaufman, Van Zandt	61 min
Mar 24, 11:52 PM CDT	Severe Thunderstorm Warning	FWD	Bosque	53 min
Mar 25, 12:12 AM CDT	Special Weather Statement	FWD	Montague	48 min
Mar 25, 12:35 AM CDT	Areal Flood Advisory	FWD	Bosque, Hill	3 hr
Mar 25, 12:42 AM CDT	Special Weather Statement	FWD	Rains	48 min
Mar 25, 12:51 AM CDT	Special Weather Statement	FWD	Delta	39 min
Mar 25, 1:44 AM CDT	Special Weather Statement	FWD	Ellis	31 min
Mar 25, 3:02 AM CDT	Special Weather Statement	FWD	Rockwall	28 min
Mar 25, 3:12 AM CDT	Special Weather Statement	FWD	Van Zandt	48 min
Mar 25, 3:29 AM CDT	Special Weather Statement	FWD	Bell	31 min
Mar 25, 5:07 AM CDT	Special Weather Statement	FWD	Milam	38 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.