Alert archive / Texas / Severe Thunderstorm Watches in 2015
Severe Thunderstorm Watch 96
The Storm Prediction Center issued this severe thunderstorm watch at Apr 22, 2015, 10:25 PM CDT for 17 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 22, 2015, 10:25 PM CDT (03:25 UTC)
- Expired
- Apr 23, 2015, 4:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Bosque County, TX, Dallas County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Hill County, TX, Hood County, TX, Jack County, TX, Johnson County, TX, Palo Pinto County, TX, Parker County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Wise County, TX, Young County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 73 km from the middle of the area, began a volume at 03:26 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
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- 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
- 60%
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 22, 11:39 PM CDT | Severe Thunderstorm Warning | FWD | Young | 66 min |
| Apr 23, 12:05 AM CDT | Severe Thunderstorm Warning | FWD | Stephens | 55 min |
| Apr 23, 12:59 AM CDT | Severe Thunderstorm Warning | FWD | Palo Pinto, Stephens | 61 min |
| Apr 23, 1:37 AM CDT | Severe Thunderstorm Warning | FWD | Erath | 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
Fort Worth, TX (KFWD), launched 00:00Z, 3.4 hours before the alert went out and 64 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
- 800 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 1005 m above ground
- 0-6 km bulk shear
- 75 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 238 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 8.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 22, 9:22 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Foard, Haskell, Jack, Knox and 5 more | 53 min |
| Apr 23, 2:12 AM CDT | Mesoscale Discussion | SPC | Bosque, Erath, Hamilton, Hill, McLennan, Somervell | 2 hr |
| Apr 23, 3:35 PM CDT | Mesoscale Discussion | SPC | Bell, Blanco, Bosque, Burnet, Coryell, Falls and 15 more | 115 min |
| Apr 23, 5:03 PM CDT | Severe Thunderstorm Watch | SPC | Bell, Burnet, Coryell, Falls, Limestone, McLennan and 3 more | 3 hr |
Nearby
Severe Thunderstorm Watches in Texas, 2015Every severe thunderstorm watch in 2015
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.