Alert archive / Texas / Severe Thunderstorm Watches in 2013
Severe Thunderstorm Watch 142
The Storm Prediction Center issued this severe thunderstorm watch at Apr 27, 2013, 5:05 PM CDT for 58 counties in Texas. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 27, 2013, 5:05 PM CDT (22:05 UTC)
- Expired
- Apr 28, 2013, 1:00 AM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 65 kt
All 58 counties
Atascosa County, TX, Austin County, TX, Bandera County, TX, Bastrop County, TX, Bell County, TX, Bexar County, TX, Blanco County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Chambers County, TX, Colorado County, TX, Comal County, TX, DeWitt County, TX, Dimmit County, TX, Edwards County, TX, Fayette County, TX, Fort Bend County, TX, Frio County, TX, Galveston County, TX, Gillespie County, TX, Gonzales County, TX, Grimes County, TX, Guadalupe County, TX, Harris County, TX, Hays County, TX, Houston County, TX, Jackson County, TX, Karnes County, TX, Kendall County, TX, Kerr County, TX, Kinney County, TX, Lavaca County, TX, Lee County, TX, Leon County, TX, Liberty County, TX, Madison County, TX, Matagorda County, TX, Maverick County, TX, Medina County, TX, Milam County, TX, Montgomery County, TX, Polk County, TX, Real County, TX, Robertson County, TX, San Jacinto County, TX, Travis County, TX, Trinity County, TX, Uvalde County, TX, Val Verde County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX, Williamson County, TX, Wilson County, TX, Zavala County, TX
The radar
The Austin/San Antonio radar (KEWX), 63 km from the middle of the area, began a volume at 22:06 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 10%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 50%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
22 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 5:06 PM CDT | Flash Flood Warning | HGX | Fort Bend, Harris | 114 min |
| Apr 27, 5:17 PM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Harris | 28 min |
| Apr 27, 5:20 PM CDT | Severe Thunderstorm Warning | HGX | Houston | 55 min |
| Apr 27, 5:25 PM CDT | Severe Thunderstorm Warning | EWX | Edwards, Real | 65 min |
| Apr 27, 5:47 PM CDT | Severe Thunderstorm Warning | HGX | Harris, Montgomery | 58 min |
| Apr 27, 5:48 PM CDT | Severe Thunderstorm Warning | HGX | Chambers, Harris | 27 min |
| Apr 27, 6:32 PM CDT | Severe Thunderstorm Warning | EWX | Bandera, Kerr, Real | 58 min |
| Apr 27, 6:35 PM CDT | Severe Thunderstorm Warning | EWX | Edwards, Real, Uvalde | 55 min |
| Apr 27, 6:49 PM CDT | Severe Thunderstorm Warning | EWX | Edwards, Val Verde | 56 min |
| Apr 27, 6:51 PM CDT | Flash Flood Warning | HGX | Brazoria, Fort Bend, Harris, Waller | 3 hr |
| Apr 27, 7:28 PM CDT | Severe Thunderstorm Warning | EWX | Edwards | 62 min |
| Apr 27, 7:50 PM CDT | Severe Thunderstorm Warning | EWX | Edwards, Val Verde | 55 min |
| Apr 27, 7:58 PM CDT | Severe Thunderstorm Warning | EWX | Edwards, Real | 62 min |
| Apr 27, 8:10 PM CDT | Severe Thunderstorm Warning | EWX | Edwards | 65 min |
| Apr 27, 8:25 PM CDT | Severe Thunderstorm Warning | HGX | Jackson, Wharton | 35 min |
| Apr 27, 8:54 PM CDT | Severe Thunderstorm Warning | EWX | Frio | 51 min |
| Apr 27, 9:48 PM CDT | Severe Thunderstorm Warning | EWX | Bexar, Medina | 57 min |
| Apr 27, 9:57 PM CDT | Flash Flood Warning | HGX | Brazoria, Fort Bend, Harris, Waller | 108 min |
| Apr 27, 10:19 PM CDT | Severe Thunderstorm Warning | HGX | Houston, Trinity | 56 min |
| Apr 27, 11:01 PM CDT | Severe Thunderstorm Warning | EWX | Wilson | 59 min |
| Apr 27, 11:20 PM CDT | Severe Thunderstorm Warning | EWX | Comal, Guadalupe, Hays | 40 min |
| Apr 28, 12:09 AM CDT | Severe Thunderstorm Warning | EWX | Hays | 66 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Del Rio, TX (KDRT), launched 12:00Z, 10.1 hours before the alert went out and 234 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
- 2124 J/kg
- Mixed-layer CIN
- -137 J/kg
- Mixed-layer LCL
- 506 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 3:36 PM CDT | Mesoscale Discussion | SPC | Bandera, Bastrop, Bexar, Blanco, Brazos, Burleson and 23 more | 84 min |
| Apr 27, 6:11 PM CDT | Mesoscale Discussion | SPC | Brewster, Terrell | 3 hr |
| Apr 27, 6:43 PM CDT | Mesoscale Discussion | SPC | Atascosa, Austin, Bandera, Bastrop, Bexar, Blanco and 55 more | 2 hr |
| Apr 27, 6:54 PM CDT | Mesoscale Discussion | SPC | Nacogdoches, Panola, Shelby | 66 min |
Nearby
Severe Thunderstorm Watches in Texas, 2013Every severe thunderstorm watch in 2013
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.