Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 14, NWS Brownsville, TX

May 15, 2021Cameron County, Hidalgo County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at May 15, 2021, 12:41 PM CDT for Cameron County, Hidalgo County, Texas. It was in force for 49 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 15, 2021, 12:41 PM CDT (17:41 UTC)
Expired
May 15, 2021, 1:30 PM CDT
In force
49 min
Issued by
NWS Brownsville, TX
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Cameron County, TX, Hidalgo County, TX

The radar

The Brownsville radar (KBRO), 79 km from the middle of the area, began a volume at 17:43 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 12:00Z, 5.7 hours before the alert went out and 82 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, Brownsville Intl, TX at 12:00Z on 2021-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1407 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brownsville Intl, TX at 12:00Z on 2021-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 square meters per square second.193958Sfc1 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
1407 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
634 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
118 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.0

Open this sounding in Storm Lab

The text

As transmitted.

314 
WUUS54 KBRO 151741
SVRBRO
TXC061-215-151830-
/O.NEW.KBRO.SV.W.0014.210515T1741Z-210515T1830Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Brownsville TX
1241 PM CDT Sat May 15 2021

The National Weather Service in Brownsville has issued a

* Severe Thunderstorm Warning for...
  Southern Hidalgo County in Deep South Texas...
  West central Cameron County in Deep South Texas...

* Until 130 PM CDT.

* At 1240 PM CDT, a severe thunderstorm was located near Guillermo
  Flores Elementary School, or near Penitas, moving east at 40 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Mission, Pharr, Harlingen, Weslaco, San Juan, Alamo, Donna,
  Mercedes, La Feria and Progreso.

This includes the following highways...
 US Highway 83 between mile markers 846 and 850.
 Interstate Highway 69 C between mile markers 1 and 3.
 US Highway 281 between mile markers 784 and 814.

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 2612 9827 2612 9830 2610 9830
      2617 9834 2616 9839 2622 9844 2621 9850
      2627 9849 2625 9780 2605 9783 2607 9786
      2607 9803 2604 9807
TIME...MOT...LOC 1740Z 275DEG 36KT 2618 9842 

HAIL...0.75IN
WIND...60MPH
 
$$

Farris
1 follow-up statement
305 
WWUS54 KBRO 151810
SVSBRO

Severe Weather Statement
National Weather Service Brownsville TX
110 PM CDT Sat May 15 2021

TXC061-215-151830-
/O.CON.KBRO.SV.W.0014.000000T0000Z-210515T1830Z/
Hidalgo TX-Cameron TX-
110 PM CDT Sat May 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM CDT
FOR SOUTHERN HIDALGO AND WEST CENTRAL CAMERON COUNTIES...

At 109 PM CDT, a severe thunderstorm was located over South Alamo, or
over Donna, moving east at 40 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Mission, Pharr, Harlingen, Weslaco, San Juan, Alamo, Donna, Mercedes,
La Feria and Progreso.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Intense thunderstorm lines can produce brief tornadoes and 
widespread significant wind damage. Although a tornado is not 
immediately likely, it is best to move to an interior room on the 
lowest floor of a building. This storm may cause serious injury and 
significant property damage.

&&

LAT...LON 2605 9807 2607 9813 2605 9815 2607 9818
      2606 9820 2612 9827 2612 9830 2610 9830
      2617 9834 2616 9839 2622 9844 2621 9850
      2627 9849 2625 9780 2605 9783 2607 9786
      2607 9803 2604 9807
TIME...MOT...LOC 1809Z 275DEG 36KT 2615 9809 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
 
$$

Farris

The office that day

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

IssuedProductOfficeCountiesLasted
May 15, 10:56 AM CDTSpecial Weather StatementBROHidalgo49 min
May 15, 11:25 AM CDTSpecial Weather StatementBROHidalgo50 min
May 15, 11:39 AM CDTAreal Flood AdvisoryBROHidalgo51 min
May 15, 12:14 PM CDTSpecial Weather StatementBROHidalgo, Starr46 min
May 15, 12:22 PM CDTTornado WarningBROHidalgo8 min
May 15, 12:23 PM CDTAreal Flood AdvisoryBROHidalgo112 min
May 15, 12:28 PM CDTTornado WarningBROHidalgo17 min
May 15, 12:48 PM CDTAreal Flood AdvisoryBROHidalgo, Starr75 min
May 15, 1:02 PM CDTSevere Thunderstorm WarningBROCameron, Hidalgo, Willacy28 min
May 15, 1:12 PM CDTFlash Flood WarningBROHidalgo49 min
May 15, 1:26 PM CDTSevere Thunderstorm WarningBROCameron, Hidalgo, Willacy28 min
May 15, 1:30 PM CDTTornado WarningBROHidalgo, Willacy15 min
May 15, 1:53 PM CDTAreal Flood AdvisoryBROCameron, Hidalgo, Willacy52 min
May 15, 2:01 PM CDTSpecial Weather StatementBROCameron, Willacy29 min
May 15, 2:23 PM CDTSpecial Marine WarningBRO97 min
May 15, 2:29 PM CDTSpecial Weather StatementBROCameron46 min
May 15, 2:37 PM CDTAreal Flood AdvisoryBROCameron, Hidalgo, Willacy53 min
May 15, 3:15 PM CDTSpecial Weather StatementBROCameron30 min
May 15, 3:22 PM CDTSpecial Weather StatementBROCameron38 min
May 15, 3:25 PM CDTAreal Flood AdvisoryBROCameron, Willacy65 min
May 15, 5:20 PM CDTSpecial Marine WarningBRO25 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.