Alert archive / Texas / Severe Thunderstorm Watches in 2014
Severe Thunderstorm Watch 99
The Storm Prediction Center issued this severe thunderstorm watch at Apr 27, 2014, 2:56 PM CDT for 12 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 27, 2014, 2:56 PM CDT (19:56 UTC)
- Expired
- Apr 27, 2014, 8:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Delta County, TX, Ellis County, TX, Fannin County, TX, Henderson County, TX, Hopkins County, TX, Hunt County, TX, Kaufman County, TX, Lamar County, TX, Navarro County, TX, Rains County, TX, Rockwall County, TX, Van Zandt County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 123 km from the middle of the area, began a volume at 19:58 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
- 2%
- Ten or more severe wind reports
- 20%
- 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
- 40%
Warnings issued inside it
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 4:22 PM CDT | Severe Thunderstorm Warning | FWD | Ellis | 38 min |
| Apr 27, 4:47 PM CDT | Severe Thunderstorm Warning | FWD | Kaufman | 58 min |
| Apr 27, 5:35 PM CDT | Severe Thunderstorm Warning | FWD | Van Zandt | 55 min |
| Apr 27, 5:44 PM CDT | Severe Thunderstorm Warning | FWD | Kaufman | 61 min |
| Apr 27, 6:09 PM CDT | Severe Thunderstorm Warning | FWD | Rains | 51 min |
| Apr 27, 6:28 PM CDT | Severe Thunderstorm Warning | FWD | Van Zandt | 32 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 12:00Z, 7.9 hours before the alert went out and 111 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
- 2370 J/kg
- Mixed-layer CIN
- -265 J/kg
- Mixed-layer LCL
- 662 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 453 m²/s²
- 0-3 km storm-relative helicity
- 548 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 5:09 AM CDT | Mesoscale Discussion | SPC | Clay, Wichita | 96 min |
| Apr 27, 7:55 AM CDT | Mesoscale Discussion | SPC | Clay, Collin, Cooke, Dallas, Delta, Denton and 10 more | 95 min |
| Apr 27, 9:03 AM CDT | Mesoscale Discussion | SPC | Anderson, Collin, Dallas, Delta, Ellis, Falls and 15 more | 27 min |
| Apr 27, 9:16 AM CDT | Severe Thunderstorm Watch | SPC | Anderson, Bell, Collin, Delta, Falls, Fannin and 16 more | 6 hr |
| Apr 27, 11:27 AM CDT | Mesoscale Discussion | SPC | Anderson, Bell, Bosque, Camp, Collin, Coryell and 27 more | 93 min |
| Apr 27, 12:25 PM CDT | Mesoscale Discussion | SPC | Bowie, Cass, Marion, Morris, Red River | 2 hr |
| Apr 27, 1:46 PM CDT | Tornado Watch | SPC | Bowie, Camp, Cass, Franklin, Gregg, Harrison and 7 more | 9 hr |
| Apr 27, 4:52 PM CDT | Mesoscale Discussion | SPC | Bowie, Cass, Marion, Morris, Red River, Titus | 53 min |
| Apr 27, 5:14 PM CDT | Mesoscale Discussion | SPC | Delta, Falls, Freestone, Henderson, Hopkins, Hunt and 6 more | 91 min |
| Apr 27, 6:11 PM CDT | Mesoscale Discussion | SPC | Bowie, Camp, Cass, Franklin, Harrison, Marion and 4 more | 64 min |
| Apr 27, 6:28 PM CDT | Mesoscale Discussion | SPC | Bastrop, Brazos, Burleson, Caldwell, Fayette, Lee and 3 more | 92 min |
Nearby
Severe Thunderstorm Watches in Texas, 2014Every severe thunderstorm watch in 2014
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.