Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 36, NWS Brownsville, TX
NWS Brownsville, TX issued this severe thunderstorm warning at Jul 28, 2021, 3:57 PM CDT for Starr County, Texas. It was in force for 33 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 28, 2021, 3:57 PM CDT (20:57 UTC)
- Expired
- Jul 28, 2021, 4:30 PM CDT
- In force
- 33 min
- Issued by
- NWS Brownsville, TX
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Starr County, TX
The radar
The Brownsville radar (KBRO), 134 km from the middle of the area, began a volume at 20:56 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, 9.0 hours before the alert went out and 136 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.
- Mixed-layer CAPE
- 2758 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 796 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- -4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
854
WUUS54 KBRO 282057
SVRBRO
TXC427-282130-
/O.NEW.KBRO.SV.W.0036.210728T2057Z-210728T2130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Brownsville TX
357 PM CDT Wed Jul 28 2021
The National Weather Service in Brownsville has issued a
* Severe Thunderstorm Warning for...
Northeastern Starr County in Deep South Texas...
* Until 430 PM CDT.
* At 355 PM CDT, severe thunderstorms were located along a line
extending from Puerto Rico to near Mccook, moving west at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Cooperative NWS Observer. Report of 61 mph wind and pea
sized hail at 349 PM.
IMPACT...Expect wind damage to poorly constructured or anchored
roofs and siding as well as mobile homes. Some trees
will also fall.
* Severe thunderstorms will be near...
La Reforma around 405 PM CDT.
San Isidro around 420 PM CDT.
La Gloria and Santa Catarina around 430 PM CDT.
Other locations impacted by these severe thunderstorms include
Diamond O Ranch Airport and Delmita as addition cells move toward La
Gloria.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with these storms. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 2646 9870 2674 9859 2672 9835 2671 9835
2640 9852
TIME...MOT...LOC 2055Z 109DEG 17KT 2665 9835 2642 9842
HAIL...1.00IN
WIND...60MPH
$$
52/BSG2 follow-up statements
115
WWUS54 KBRO 282114
SVSBRO
Severe Weather Statement
National Weather Service Brownsville TX
414 PM CDT Wed Jul 28 2021
TXC427-282130-
/O.CON.KBRO.SV.W.0036.000000T0000Z-210728T2130Z/
Starr TX-
414 PM CDT Wed Jul 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CDT
FOR NORTHEASTERN STARR COUNTY...
At 410 PM CDT, severe thunderstorms were located along a line
extending from near La Reforma to the Starr Hidalgo County line
west of McCook, moving west at 20 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...NWS Cooperative Observer in McCook reported 61 mph gusts
and pea sized hail at 349 PM.
IMPACT...Expect damage to poorly constructed roofs, siding, and
sheds as well as unanchored mobile homes or trailers.
These severe storms will be near...
San Isidro around 420 PM CDT.
La Gloria through 430 PM CDT.
Santa Catarina between 430 and 440 PM CDT.
Other locations impacted by these severe thunderstorms include
Diamond O Ranch Airport and Delmita. The wind core is beginning to
weaken, but the threat continues. McAllen/Miller Airport had a 54
mph gust on the backside of similar storms at 334 PM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 2646 9870 2674 9859 2672 9835 2671 9835
2640 9852
TIME...MOT...LOC 2110Z 109DEG 17KT 2667 9842 2644 9849
HAIL...0.75IN
WIND...60MPH
$$
52/BSG673
WWUS54 KBRO 282131
SVSBRO
Severe Weather Statement
National Weather Service Brownsville TX
431 PM CDT Wed Jul 28 2021
TXC427-282139-
/O.EXP.KBRO.SV.W.0036.000000T0000Z-210728T2130Z/
Starr TX-
431 PM CDT Wed Jul 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN STARR COUNTY WILL
EXPIRE AT 430 PM CDT...
The storms which prompted the warning have weakened below severe
limits. Therefore, the warning will be allowed to expire.
However, wind gusts to 30 or 40 mph are still a threat along
FM 755 and nearby roads and torrential rains will reduce visibility
to 1 mile or less in these areas of the ranch country in eastern
Starr County through 5 PM.
LAT...LON 2646 9870 2674 9859 2672 9835 2671 9835
2640 9852
TIME...MOT...LOC 2129Z 109DEG 17KT 2670 9851 2647 9858
$$
52/BSGThe office that day
Everything else NWS Brownsville, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 2:35 PM CDT | Special Weather Statement | BRO | Hidalgo | 40 min |
| Jul 28, 3:23 PM CDT | Special Weather Statement | BRO | Hidalgo | 22 min |
| Jul 28, 3:45 PM CDT | Severe Thunderstorm Warning | BRO | Hidalgo | 30 min |
| Jul 28, 4:54 PM CDT | Special Weather Statement | BRO | Jim Hogg | 21 min |
| Jul 28, 5:49 PM CDT | Special Weather Statement | BRO | Zapata | 41 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.