Alert archive / Texas / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 378
The Storm Prediction Center issued this severe thunderstorm watch at May 26, 2011, 2:01 AM CDT for 9 counties in Texas. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- May 26, 2011, 2:01 AM CDT (07:01 UTC)
- Expired
- May 26, 2011, 5:34 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 60 kt
Counties Calhoun County, TX, DeWitt County, TX, Goliad County, TX, Jackson County, TX, Lavaca County, TX, Matagorda County, TX, Refugio County, TX, Victoria County, TX, Wharton County, TX
The radar
The Austin/San Antonio radar (KEWX), 137 km from the middle of the area, began a volume at 07:01 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
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 20%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 2:10 AM CDT | Severe Thunderstorm Warning | HGX | Jackson, Matagorda, Wharton | 50 min |
| May 26, 2:31 AM CDT | Severe Thunderstorm Warning | CRP | Calhoun | 44 min |
| May 26, 2:43 AM CDT | Severe Thunderstorm Warning | CRP | Calhoun, Victoria | 32 min |
| May 26, 2:59 AM CDT | Severe Thunderstorm Warning | HGX | Jackson, Matagorda | 61 min |
| May 26, 3:15 AM CDT | Severe Thunderstorm Warning | CRP | Calhoun, Victoria | 45 min |
| May 26, 3:16 AM CDT | Severe Thunderstorm Warning | EWX | DeWitt | 44 min |
| May 26, 3:40 AM CDT | Severe Thunderstorm Warning | CRP | Goliad, Victoria | 50 min |
| May 26, 3:52 AM CDT | Tornado Warning | CRP | Goliad, Victoria | 23 min |
| May 26, 4:16 AM CDT | Tornado Warning | CRP | Goliad | 14 min |
| May 26, 4:31 AM CDT | Severe Thunderstorm Warning | CRP | Goliad | 29 min |
| May 26, 4:47 AM CDT | Severe Thunderstorm Warning | CRP | Refugio | 13 min |
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 00:00Z, 7.0 hours before the alert went out and 154 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
- 4864 J/kg
- Mixed-layer CIN
- -116 J/kg
- Mixed-layer LCL
- 897 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 4.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 7:45 PM CDT | Mesoscale Discussion | SPC | Angelina, Sabine, San Augustine, Shelby | 60 min |
Nearby
Severe Thunderstorm Watches in Texas, 2011Every severe thunderstorm watch in 2011
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.