Alert archive / Texas / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 84, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 10, 2012, 4:52 PM CDT for DeWitt County, Gonzales County, Karnes County, Texas. It was in force for 29 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 10, 2012, 4:52 PM CDT (21:52 UTC)
- Expired
- May 10, 2012, 5:21 PM CDT
- In force
- 29 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
Counties DeWitt County, TX, Gonzales County, TX, Karnes County, TX
The radar
The Austin/San Antonio radar (KEWX), 78 km from the middle of the area, began a volume at 21:53 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 10, 11:40 AM CDT | Tornado Watch | SPC | 8 hr |
| May 10, 12:32 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 9.9 hours before the alert went out and 163 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
- 1593 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 779 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 122 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
138 WUUS54 KEWX 102152 SVREWX TXC123-177-255-102245- /O.NEW.KEWX.SV.W.0084.120510T2152Z-120510T2245Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 452 PM CDT THU MAY 10 2012 THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... DEWITT COUNTY... SOUTH CENTRAL GONZALES COUNTY... NORTHEASTERN KARNES COUNTY... * UNTIL 545 PM CDT. * AT 449 PM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR NORDHEIM... OR 8 MILES WEST OF YORKTOWN...AND MOVING NORTHEAST AT 20 MPH. * SOME LOCATIONS IN THE WARNING INCLUDE WESTHOFF...CUERO...HOCHHEIM AND CHEAPSIDE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A TORNADO WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES. A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT THURSDAY EVENING FOR SOUTH CENTRAL TEXAS. && LAT...LON 2944 9745 2917 9711 2887 9761 2904 9776 TIME...MOT...LOC 2152Z 226DEG 19KT 2901 9762 $$
2 follow-up statements
179 WWUS54 KEWX 102205 SVSEWX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 505 PM CDT THU MAY 10 2012 TXC123-177-255-102245- /O.CON.KEWX.SV.W.0084.000000T0000Z-120510T2245Z/ DEWITT TX-GONZALES TX-KARNES TX- 505 PM CDT THU MAY 10 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR NORTHEASTERN KARNES...SOUTH CENTRAL GONZALES AND DEWITT COUNTIES... AT 503 PM CDT...NWS METEOROLOGISTS CONTINUED TO DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR GRUENAU...OR 6 MILES NORTHWEST OF YORKTOWN...MOVING NORTHEAST AT 20 MPH. SOME LOCATIONS IN THE WARNING AREA INCLUDE SAMPLE...WESTHOFF... CUERO...EDGAR...CONCRETE...HOCHHEIM AND CHEAPSIDE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT THURSDAY EVENING FOR SOUTH CENTRAL TEXAS. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 800 PM CDT THURSDAY EVENING FOR SOUTH CENTRAL TEXAS. && LAT...LON 2944 9745 2917 9711 2887 9761 2904 9776 TIME...MOT...LOC 2205Z 226DEG 19KT 2906 9756 $$
237 WWUS54 KEWX 102221 SVSEWX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 521 PM CDT THU MAY 10 2012 TXC123-177-255-102231- /O.CAN.KEWX.SV.W.0084.000000T0000Z-120510T2245Z/ DEWITT TX-GONZALES TX-KARNES TX- 521 PM CDT THU MAY 10 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN KARNES...SOUTH CENTRAL GONZALES AND DEWITT COUNTIES IS CANCELLED... THE STORM HAS WEAKENED BELOW SEVERE LEVELS. A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT THURSDAY EVENING FOR SOUTH CENTRAL TEXAS. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 800 PM CDT THURSDAY EVENING FOR SOUTH CENTRAL TEXAS. LAT...LON 2944 9745 2917 9711 2887 9761 2904 9776 TIME...MOT...LOC 2221Z 226DEG 19KT 2912 9749 $$
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 5:21 AM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 54 min |
| May 10, 6:12 AM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 63 min |
| May 10, 7:19 AM CDT | Severe Thunderstorm Warning | EWX | Edwards, Val Verde | 44 min |
| May 10, 9:29 AM CDT | Severe Thunderstorm Warning | EWX | Dimmit, Frio, Zavala | 61 min |
| May 10, 10:30 AM CDT | Severe Thunderstorm Warning | EWX | Frio | 60 min |
| May 10, 10:33 AM CDT | Areal Flood Advisory | EWX | Frio | 117 min |
| May 10, 11:17 AM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Frio | 58 min |
| May 10, 11:32 AM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Wilson | 58 min |
| May 10, 12:02 PM CDT | Flash Flood Warning | EWX | Val Verde | 3 hr |
| May 10, 12:14 PM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Frio | 31 min |
| May 10, 12:20 PM CDT | Areal Flood Advisory | EWX | Atascosa, Frio | 2 hr |
| May 10, 12:40 PM CDT | Areal Flood Advisory | EWX | Bandera, Edwards, Kerr, Kinney, Real, Uvalde | 110 min |
| May 10, 1:04 PM CDT | Severe Thunderstorm Warning | EWX | Karnes, Wilson | 56 min |
| May 10, 1:15 PM CDT | Tornado Warning | EWX | Gonzales, Karnes, Wilson | 45 min |
| May 10, 1:42 PM CDT | Tornado Warning | EWX | Atascosa | 33 min |
| May 10, 1:57 PM CDT | Tornado Warning | EWX | DeWitt, Gonzales, Karnes, Wilson | 33 min |
| May 10, 2:19 PM CDT | Flash Flood Warning | EWX | Atascosa, DeWitt, Gonzales, Karnes, Wilson | 3 hr |
| May 10, 2:24 PM CDT | Severe Thunderstorm Warning | EWX | Karnes | 51 min |
| May 10, 2:42 PM CDT | Tornado Warning | EWX | Karnes | 48 min |
| May 10, 2:49 PM CDT | Flash Flood Warning | EWX | Bandera, Edwards, Kerr, Real, Uvalde | 3 hr |
| May 10, 3:05 PM CDT | Tornado Warning | EWX | Wilson | 40 min |
| May 10, 3:31 PM CDT | Tornado Warning | EWX | Karnes | 29 min |
| May 10, 3:40 PM CDT | River Flood Warning | EWX | Val Verde | 31 hr |
| May 10, 3:45 PM CDT | Areal Flood Advisory | EWX | DeWitt, Fayette, Gonzales, Lavaca | 105 min |
| May 10, 3:57 PM CDT | Tornado Warning | EWX | DeWitt, Karnes, Wilson | 33 min |
| May 10, 4:39 PM CDT | Flash Flood Warning | EWX | Bandera, Gillespie, Kerr | 81 min |
| May 10, 5:58 PM CDT | Flash Flood Warning | EWX | Bandera, Blanco, Burnet, Edwards, Gillespie, Kendall and 4 more | 3 hr |
| May 10, 5:58 PM CDT | Severe Thunderstorm Warning | EWX | Dimmit, Maverick, Uvalde, Zavala | 47 min |
| May 10, 6:11 PM CDT | Areal Flood Advisory | EWX | DeWitt, Fayette, Karnes, Lavaca | 109 min |
| May 10, 6:41 PM CDT | Severe Thunderstorm Warning | EWX | Dimmit, Frio, Zavala | 49 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2012Every severe thunderstorm warning in 2012
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.