Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 34, NWS Brownsville, TX

July 20, 2021Hidalgo County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Jul 20, 2021, 7:56 PM CDT for Hidalgo County, Texas. It was in force for 34 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: Jul 20, 2021, 7:56 PM CDT (00:56 UTC)
Expired: Jul 20, 2021, 8:30 PM CDT
In force: 34 min
Issued by: NWS Brownsville, TX
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Hidalgo County, TX

The radar

The Brownsville radar (KBRO), 80 km from the middle of the area, began a volume at 00:58 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 nearest sounding before it

Brownsville Intl, TX (KBRO), launched 00:00Z, 0.9 hours before the alert went out and 83 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: 1409 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 1156 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -59 m²/s²
0-3 km storm-relative helicity: -21 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -1.4

Open this sounding in Storm Lab

The text

As transmitted.

981 
WUUS54 KBRO 210056
SVRBRO
TXC215-210130-
/O.NEW.KBRO.SV.W.0034.210721T0056Z-210721T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Brownsville TX
756 PM CDT Tue Jul 20 2021

The National Weather Service in Brownsville has issued a

* Severe Thunderstorm Warning for...
  Southeastern Hidalgo County in Deep South Texas...

* Until 830 PM CDT.

* At 756 PM CDT, a severe thunderstorm was located over South Pharr
  Elementary School, or over Hidalgo, moving southeast at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Mission, Pharr, San Juan, Alamo, Donna, Hidalgo, Progreso, North
  McAllen, Sharyland and South McAllen.

This includes the following highways...
 Interstate Highway 69 C between mile markers 1 and 3.
 US Highway 281 between mile markers 784 and 808.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2605 9807 2607 9813 2605 9815 2607 9818
      2606 9820 2610 9829 2612 9827 2612 9830
      2610 9830 2617 9834 2616 9839 2619 9842
      2630 9823 2607 9788 2607 9803 2604 9807
TIME...MOT...LOC 0056Z 311DEG 24KT 2613 9822 

HAIL...<.75IN
WIND...60MPH
 
$$

BA

1 follow-up statement

279 
WWUS54 KBRO 210124
SVSBRO

Severe Weather Statement
National Weather Service Brownsville TX
824 PM CDT Tue Jul 20 2021

TXC215-210134-
/O.EXP.KBRO.SV.W.0034.000000T0000Z-210721T0130Z/
Hidalgo TX-
824 PM CDT Tue Jul 20 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HIDALGO COUNTY
WILL EXPIRE AT 830 PM CDT...
        
The storm which prompted the warning has weakened below severe 
limits, and has also exited the warned area. Therefore, the warning 
will be allowed to expire.

LAT...LON 2605 9807 2607 9813 2605 9815 2607 9818
      2606 9820 2610 9829 2612 9827 2612 9830
      2610 9830 2617 9834 2616 9839 2619 9842
      2630 9823 2607 9788 2607 9803 2604 9807
TIME...MOT...LOC 0124Z 311DEG 24KT 2602 9808 

$$

BA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 7:26 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo	34 min
Jul 20, 8:03 PM CDT	Areal Flood Advisory	BRO	Hidalgo	57 min
Jul 21, 12:02 PM CDT	Special Weather Statement	BRO	Cameron	43 min
Jul 21, 12:28 PM CDT	Special Weather Statement	BRO	Cameron	47 min
Jul 21, 1:15 PM CDT	Special Weather Statement	BRO	Starr	45 min
Jul 21, 1:16 PM CDT	Areal Flood Advisory	BRO	Cameron	119 min
Jul 21, 1:31 PM CDT	Special Weather Statement	BRO	Starr	44 min
Jul 21, 1:48 PM CDT	Special Weather Statement	BRO	Starr	42 min
Jul 21, 2:00 PM CDT	Special Weather Statement	BRO	Hidalgo	45 min
Jul 21, 2:05 PM CDT	Areal Flood Advisory	BRO	Hidalgo	115 min
Jul 21, 2:25 PM CDT	Special Weather Statement	BRO	Starr	35 min
Jul 21, 2:37 PM CDT	Areal Flood Advisory	BRO	Cameron	7 min
Jul 21, 2:44 PM CDT	Flash Flood Warning	BRO	Cameron	63 min
Jul 21, 2:44 PM CDT	Special Weather Statement	BRO	Hidalgo	31 min
Jul 21, 2:56 PM CDT	Areal Flood Advisory	BRO	Cameron, Hidalgo	5 hr
Jul 21, 2:59 PM CDT	Special Weather Statement	BRO	Starr	31 min
Jul 21, 3:22 PM CDT	Special Weather Statement	BRO	Kenedy	23 min
Jul 21, 3:39 PM CDT	Areal Flood Advisory	BRO	Hidalgo	111 min
Jul 21, 3:53 PM CDT	Areal Flood Advisory	BRO	Hidalgo	52 min
Jul 21, 4:15 PM CDT	Flash Flood Warning Considerable damage threat	BRO	Hidalgo	105 min
Jul 21, 4:27 PM CDT	Areal Flood Advisory	BRO	Brooks	63 min
Jul 21, 4:40 PM CDT	Areal Flood Advisory	BRO	Cameron	110 min
Jul 21, 4:56 PM CDT	Special Weather Statement	BRO	Cameron	49 min
Jul 21, 5:31 PM CDT	Areal Flood Advisory	BRO	Cameron	89 min
Jul 21, 5:40 PM CDT	Special Weather Statement	BRO	Cameron	50 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.