Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 33, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 12, 2021, 7:53 PM CDT for Burnet County, Llano County, Texas. It was in force for 33 min. 1 report 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
- Apr 12, 2021, 7:53 PM CDT (00:53 UTC)
- Expired
- Apr 12, 2021, 8:26 PM CDT
- In force
- 33 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 60.0 mph
Counties Burnet County, TX, Llano County, TX
The radar
The Ft Hood radar (KGRK), 107 km from the middle of the area, began a volume at 00:56 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 12, 7:54 PM CDT | HAIL 1.75 | 2 Se Llano, TX | GOLFBALL SIZE HAIL VIA SOCIAL MEDIA. |
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 |
|---|---|---|---|
| Apr 12, 3:51 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 0.9 hours before the alert went out and 263 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
- 1192 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 1812 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 216 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.7
The text
As transmitted.
582
WUUS54 KEWX 130053
SVREWX
TXC053-299-130200-
/O.NEW.KEWX.SV.W.0033.210413T0053Z-210413T0200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
753 PM CDT Mon Apr 12 2021
The National Weather Service in Austin San Antonio has issued a
* Severe Thunderstorm Warning for...
Northeastern Llano County in south central Texas...
Southwestern Burnet County in south central Texas...
* Until 900 PM CDT.
* At 752 PM CDT, a severe thunderstorm was located over Llano, moving
east at 35 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.
* Locations impacted include...
Burnet, Marble Falls, Kingsland, Llano, Buchanan Dam, Gainesville,
Granite Shoals, Meadowlakes, Highland Haven, Inks Lake State Park,
Lone Grove, Bluffton, Stolz, Longhorn Cavern State Park and Sunrise
Beach Village.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3066 9874 3084 9872 3082 9814 3054 9818
TIME...MOT...LOC 0052Z 276DEG 30KT 3075 9864
HAIL...1.75IN
WIND...60MPH
$$
YB2 follow-up statements
750
WWUS54 KEWX 130109
SVSEWX
Severe Weather Statement
National Weather Service Austin/San Antonio TX
809 PM CDT Mon Apr 12 2021
TXC053-299-130200-
/O.CON.KEWX.SV.W.0033.000000T0000Z-210413T0200Z/
Llano TX-Burnet TX-
809 PM CDT Mon Apr 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR EAST CENTRAL LLANO AND SOUTHWESTERN BURNET COUNTIES...
At 808 PM CDT, a severe thunderstorm was located near Gainesville, or
7 miles northwest of Kingsland, moving east at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Burnet, Marble Falls, Kingsland, Buchanan Dam, Gainesville, Granite
Shoals, Meadowlakes, Highland Haven, Inks Lake State Park, Stolz,
Longhorn Cavern State Park and Sunrise Beach Village.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3064 9867 3081 9861 3081 9814 3054 9818
TIME...MOT...LOC 0108Z 288DEG 21KT 3071 9856
HAIL...1.00IN
WIND...60MPH
$$
YB128
WWUS54 KEWX 130126
SVSEWX
Severe Weather Statement
National Weather Service Austin/San Antonio TX
826 PM CDT Mon Apr 12 2021
TXC053-299-130136-
/O.CAN.KEWX.SV.W.0033.000000T0000Z-210413T0200Z/
Llano TX-Burnet TX-
826 PM CDT Mon Apr 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL LLANO AND
SOUTHWESTERN BURNET COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
south central Texas.
LAT...LON 3064 9867 3081 9861 3081 9814 3054 9818
TIME...MOT...LOC 0124Z 276DEG 30KT 3069 9839
$$
YBThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 12, 7:00 PM CDT | Severe Thunderstorm Warning | EWX | Llano | 60 min |
| Apr 12, 9:58 PM CDT | Special Weather Statement | EWX | Edwards | 47 min |
| Apr 12, 10:42 PM CDT | Severe Thunderstorm Warning | EWX | Edwards, Kerr | 63 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.