Alert archive / Texas / Severe Thunderstorm Watches in 2013
Severe Thunderstorm Watch 77
The Storm Prediction Center issued this severe thunderstorm watch at Mar 31, 2013, 9:06 PM CDT for 4 counties in Texas. It was in force for 69 min.
The area
The outline as issued.
The facts
- Issued
- Mar 31, 2013, 9:06 PM CDT (02:06 UTC)
- Expired
- Mar 31, 2013, 10:15 PM CDT
- In force
- 69 min
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 60 kt
Counties Brooks County, TX, Hidalgo County, TX, Kenedy County, TX, Willacy County, TX
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
- 30%
- 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
- 80%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 31, 9:07 PM CDT | Severe Thunderstorm Warning | BRO | Brooks, Kenedy | 53 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
Corpus Christi, TX (KCRP), launched 00:00Z, 2.1 hours before the alert went out and 103 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
- 1027 J/kg
- Mixed-layer CIN
- -244 J/kg
- Mixed-layer LCL
- 898 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 31, 7:27 PM CDT | Mesoscale Discussion | SPC | Dimmit, Duval, Frio, Jim Wells, Kinney, Kleberg and 8 more | 93 min |
| Mar 31, 9:47 PM CDT | Mesoscale Discussion | SPC | Brooks, Kleberg | 28 min |
| Apr 1, 3:23 PM CDT | Mesoscale Discussion | SPC | Borden, Briscoe, Childress, Cottle, Crosby, Dickens and 16 more | 67 min |
| Apr 1, 3:36 PM CDT | Severe Thunderstorm Watch | SPC | Armstrong, Borden, Briscoe, Childress, Collingsworth, Cottle and 19 more | 5 hr |
| Apr 1, 5:27 PM CDT | Mesoscale Discussion | SPC | Baylor, Childress, Cottle, Dickens, Foard, Hall and 8 more | 93 min |
| Apr 1, 6:44 PM CDT | Mesoscale Discussion | SPC | Pecos, Terrell | 91 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.