Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 9, NWS Brownsville, TX
NWS Brownsville, TX issued this severe thunderstorm warning at May 12, 2021, 1:04 AM CDT for Cameron County, Hidalgo County, Texas. It was in force for 41 min. 10 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
- May 12, 2021, 1:04 AM CDT (06:04 UTC)
- Expired
- May 12, 2021, 1:45 AM CDT
- In force
- 41 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), 70 km from the middle of the area, began a volume at 06:06 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 |
|---|---|---|---|
| May 12, 1:05 AM CDT | TSTM WND GST 73 | 2 N Pharr, TX | 73MPH WIND GUST RECORDED VIA ANEMOMETER AT THE PHARR EOC. |
| May 12, 1:07 AM CDT | TSTM WND GST 63 | 2 Ssw Mcallen, TX | ASOS STATION KMFE MCALLEN. |
| May 12, 1:07 AM CDT | TSTM WND GST 63 | Mcallen, TX | MCALLEN AIRPORT ASOS REPORTED A WIND GUST TO 63 MPH |
| May 12, 1:20 AM CDT | TSTM WND DMG | 1 Ne Donna, TX | REPORT RECEIVED VIA SOCIAL MEDIA OF A METAL ROOF COLLAPSED IN HIGH WINDS. TIME ESTIMATED VIA RADAR. |
| May 12, 1:20 AM CDT | TSTM WND DMG | Donna, TX | RECEIVED VIA SOCIAL MEDIA: NUMEROUS REPORTS OF TREES DAMAGED OR UPROOTED IN DONNA. TIMING ESTIMATED VIA RADAR. |
| May 12, 1:30 AM CDT | TSTM WND DMG | 1 Nw Donna, TX | PALM TREE UPROOTED NEAR THE INTERSECTION OF INTERSTATE-2 AND HUTTO ROAD. |
| May 12, 1:30 AM CDT | TSTM WND DMG | 1 S Donna, TX | RECEIVED VIA SOCIAL MEDIA: RECEIVED PHOTO OF A BROKEN POWER POLE. TIMING ESTIMATED VIA RADAR. |
| May 12, 1:30 AM CDT | TSTM WND DMG | Weslaco, TX | RECEIVED VIA SOCIAL MEDIA: NUMEROUS REPORTS OF TREES DAMAGED OR UPROOTED IN WESLACO. TIMING ESTIMATED VIA RADAR. |
| May 12, 1:40 AM CDT | TSTM WND DMG | 1 Ene Mercedes, TX | NUMEROUS REPORTS RECEIVED VIA SOCIAL MEDIA OF TREE DAMAGE AND TREE BRANCHES DOWN ON VEHICLES IN THE MERCEDES AREA. TIME ESTIMATED VIA RADAR. |
| May 12, 1:45 AM CDT | TSTM WND DMG | La Feria, TX | REPORT RECEIVED VIA SOCIAL MEDIA OF A PALM TREE UPROOTED IN LA FERIA. TIME ESTIMATED VIA RADAR. |
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 |
|---|---|---|---|
| May 11, 8:34 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Brownsville Intl, TX (KBRO), launched 00:00Z, 6.1 hours before the alert went out and 72 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
- 2611 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 772 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.3
The text
As transmitted.
678
WUUS54 KBRO 120604
SVRBRO
TXC061-215-120645-
/O.NEW.KBRO.SV.W.0009.210512T0604Z-210512T0645Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Brownsville TX
104 AM CDT Wed May 12 2021
The National Weather Service in Brownsville has issued a
* Severe Thunderstorm Warning for...
Southeastern Hidalgo County in Deep South Texas...
Northwestern Cameron County in Deep South Texas...
* Until 145 AM CDT.
* At 104 AM CDT, a severe thunderstorm was located over North Alamo
Elementary School, or over Alamo, moving east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Edinburg, Pharr, Harlingen, Weslaco, San Juan, Alamo, Donna,
Mercedes, Hidalgo and La Feria.
This includes the following highways...
Interstate Highway 69 E between mile markers 25 and 38.
Interstate Highway 69 C between mile markers 1 and 10.
US Highway 281 between mile markers 784 and 820.
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 this storm. 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 this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 2607 9786 2605 9797 2607 9803 2604 9807
2605 9807 2607 9813 2605 9815 2607 9818
2606 9820 2610 9829 2612 9827 2612 9828
2610 9830 2613 9833 2636 9828 2635 9786
2632 9766 2602 9774
TIME...MOT...LOC 0604Z 287DEG 33KT 2620 9812
HAIL...<.75IN
WIND...60MPH
$$
TOMASELLI2 follow-up statements
516
WWUS54 KBRO 120611
SVSBRO
Severe Weather Statement
National Weather Service Brownsville TX
111 AM CDT Wed May 12 2021
TXC061-215-120645-
/O.CON.KBRO.SV.W.0009.000000T0000Z-210512T0645Z/
Hidalgo TX-Cameron TX-
111 AM CDT Wed May 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 AM CDT
FOR SOUTHEASTERN HIDALGO AND NORTHWESTERN CAMERON COUNTIES...
At 111 AM CDT, a severe thunderstorm was located over Donna, moving
east at 40 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Edinburg, Pharr, Harlingen, Weslaco, San Juan, Alamo, Donna,
Mercedes, Hidalgo and La Feria.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 2607 9786 2605 9797 2607 9803 2604 9807
2605 9807 2607 9813 2605 9815 2607 9818
2606 9820 2610 9829 2612 9827 2612 9828
2610 9830 2613 9833 2636 9828 2635 9786
2632 9766 2602 9774
TIME...MOT...LOC 0611Z 287DEG 33KT 2618 9805
HAIL...<.75IN
WIND...70MPH
$$
TOMASELLI525
WWUS54 KBRO 120625
SVSBRO
Severe Weather Statement
National Weather Service Brownsville TX
125 AM CDT Wed May 12 2021
TXC061-215-120645-
/O.CON.KBRO.SV.W.0009.000000T0000Z-210512T0645Z/
Hidalgo TX-Cameron TX-
125 AM CDT Wed May 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 AM CDT
FOR SOUTHEASTERN HIDALGO AND NORTHWESTERN CAMERON COUNTIES...
At 124 AM CDT, a severe thunderstorm was located over Mercedes
Memorial Library, or over Mercedes, moving east at 40 mph.
This is a very dangerous storm.
HAZARD...80 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be heavily damaged. Expect
considerable damage to roofs, windows, and vehicles.
Extensive tree damage and power outages are likely.
Locations impacted include...
Edinburg, Pharr, Harlingen, Weslaco, San Juan, Alamo, Donna,
Mercedes, Hidalgo and La Feria.
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 this storm.
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 this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 2607 9786 2605 9797 2607 9803 2604 9807
2605 9807 2607 9813 2605 9815 2607 9818
2606 9820 2610 9829 2612 9827 2612 9828
2610 9830 2613 9833 2636 9828 2635 9786
2632 9766 2602 9774
TIME...MOT...LOC 0624Z 287DEG 33KT 2614 9792
HAIL...<.75IN
WIND...80MPH
$$
TOMASELLIThe office that day
Everything else NWS Brownsville, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 8:51 PM CDT | Special Weather Statement | BRO | Zapata | 39 min |
| May 11, 9:11 PM CDT | Severe Thunderstorm Warning | BRO | Jim Hogg, Zapata | 49 min |
| May 11, 9:39 PM CDT | Special Weather Statement | BRO | Zapata | 51 min |
| May 11, 9:48 PM CDT | Severe Thunderstorm Warning | BRO | Zapata | 42 min |
| May 11, 9:54 PM CDT | Severe Thunderstorm Warning | BRO | Brooks, Jim Hogg | 51 min |
| May 11, 10:26 PM CDT | Severe Thunderstorm Warning | BRO | Starr, Zapata | 49 min |
| May 11, 10:45 PM CDT | Special Weather Statement | BRO | Brooks, Kenedy | 60 min |
| May 11, 11:04 PM CDT | Areal Flood Advisory | BRO | Zapata | 4 hr |
| May 11, 11:14 PM CDT | Severe Thunderstorm Warning | BRO | Starr, Zapata | 46 min |
| May 11, 11:21 PM CDT | Areal Flood Advisory | BRO | Jim Hogg, Starr, Zapata | 4 hr |
| May 11, 11:22 PM CDT | Areal Flood Advisory | BRO | Jim Hogg, Zapata | 94 min |
| May 11, 11:51 PM CDT | Special Weather Statement | BRO | Hidalgo, Kenedy, Starr | 54 min |
| May 11, 11:56 PM CDT | Severe Thunderstorm Warning | BRO | Starr | 36 min |
| May 12, 12:06 AM CDT | Areal Flood Advisory | BRO | Starr | 3 hr |
| May 12, 12:21 AM CDT | Areal Flood Advisory | BRO | Brooks, Hidalgo, Starr | 3 hr |
| May 12, 12:25 AM CDT | Areal Flood Advisory | BRO | Starr | 3 hr |
| May 12, 12:28 AM CDT | Special Weather Statement | BRO | Hidalgo | 62 min |
| May 12, 12:38 AM CDT | Special Weather Statement | BRO | Starr | 52 min |
| May 12, 12:44 AM CDT | Severe Thunderstorm Warning | BRO | Hidalgo, Willacy | 30 min |
| May 12, 12:50 AM CDT | Special Weather Statement | BRO | Kenedy | 55 min |
| May 12, 1:00 AM CDT | Severe Thunderstorm Warning | BRO | Kenedy | 60 min |
| May 12, 1:12 AM CDT | Areal Flood Advisory | BRO | Hidalgo, Starr | 3 hr |
| May 12, 1:12 AM CDT | Special Marine Warning | BRO | 48 min | |
| May 12, 1:19 AM CDT | Areal Flood Advisory | BRO | Hidalgo, Willacy | 3 hr |
| May 12, 1:34 AM CDT | Special Marine Warning | BRO | 26 min | |
| May 12, 1:40 AM CDT | Severe Thunderstorm Warning | BRO | Cameron | 49 min |
| May 12, 1:46 AM CDT | Areal Flood Advisory | BRO | Cameron, Hidalgo | 3 hr |
| May 12, 1:50 AM CDT | Severe Thunderstorm Warning | BRO | Hidalgo | 40 min |
| May 12, 1:53 AM CDT | Special Marine Warning | BRO | 22 min | |
| May 12, 2:24 AM CDT | Areal Flood Advisory | BRO | Cameron | 3 hr |
| May 12, 2:27 AM CDT | Special Weather Statement | BRO | Cameron | 63 min |
| May 12, 2:39 AM CDT | Special Marine Warning | BRO | 41 min | |
| May 12, 2:40 AM CDT | Severe Thunderstorm Warning | BRO | Cameron | 34 min |
| May 12, 2:51 AM CDT | Severe Thunderstorm Warning | BRO | Cameron | 39 min |
| May 12, 3:31 AM CDT | Special Weather Statement | BRO | Cameron | 59 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.