Alert archive / Texas / Tornado Watches in 1999
Tornado Watch 151
The Storm Prediction Center issued this tornado watch at Apr 13, 1999, 9:15 PM CDT for 37 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 13, 1999, 9:15 PM CDT (02:15 UTC)
- Expired
- Apr 14, 1999, 3:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 37 counties
Brown County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Comanche County, TX, Concho County, TX, Crockett County, TX, Eastland County, TX, Edwards County, TX, Fisher County, TX, Glasscock County, TX, Haskell County, TX, Irion County, TX, Jack County, TX, Jones County, TX, Kimble County, TX, McCulloch County, TX, Menard County, TX, Mitchell County, TX, Nolan County, TX, Palo Pinto County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Scurry County, TX, Shackelford County, TX, Stephens County, TX, Sterling County, TX, Stonewall County, TX, Sutton County, TX, Taylor County, TX, Terrell County, TX, Throckmorton County, TX, Tom Green County, TX, Val Verde County, TX, Wise County, TX, Young County, TX
The radar
The San Angelo radar (KSJT), 34 km from the middle of the area, began a volume at 02:19 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.
Warnings issued inside it
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 9:16 PM CDT | Severe Thunderstorm Warning | SJT | Nolan | 64 min |
| Apr 13, 9:17 PM CDT | Tornado Warning | SJT | Coke | 63 min |
| Apr 13, 9:20 PM CDT | Severe Thunderstorm Warning | SJT | Irion, Tom Green | 50 min |
| Apr 13, 9:49 PM CDT | Severe Thunderstorm Warning | SJT | Shackelford | 81 min |
| Apr 13, 9:57 PM CDT | Severe Thunderstorm Warning | SJT | Jones, Taylor | 48 min |
| Apr 13, 10:18 PM CDT | Severe Thunderstorm Warning | SJT | Coke, Tom Green | 47 min |
| Apr 13, 10:20 PM CDT | Severe Thunderstorm Warning | SJT | Runnels | 50 min |
| Apr 13, 10:38 PM CDT | Severe Thunderstorm Warning | SJT | Throckmorton | 47 min |
| Apr 13, 10:39 PM CDT | Severe Thunderstorm Warning | SJT | Tom Green | 51 min |
| Apr 13, 10:47 PM CDT | Severe Thunderstorm Warning | SJT | Taylor | 48 min |
| Apr 13, 11:00 PM CDT | Severe Thunderstorm Warning | SJT | Callahan, Coleman | 75 min |
| Apr 13, 11:56 PM CDT | Severe Thunderstorm Warning | FWD | Stephens | 49 min |
| Apr 14, 1:03 AM CDT | Severe Thunderstorm Warning | FWD | Wise | 42 min |
The nearest sounding before it
Midland Regional, TX (KMAF), launched 00:00Z, 2.3 hours before the alert went out and 151 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
- 15 J/kg
- Mixed-layer CIN
- -195 J/kg
- Mixed-layer LCL
- 2360 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- -128 m²/s²
- 0-3 km storm-relative helicity
- 171 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 7:00 PM CDT | Tornado Watch | SPC | Baylor, Briscoe, Childress, Collingsworth, Cottle, Crosby and 18 more | 5 hr |
| Apr 14, 12:30 AM CDT | Severe Thunderstorm Watch | SPC | Bell, Blanco, Bosque, Burnet, Collin, Coryell and 34 more | 6 hr |
| Apr 14, 10:00 AM CDT | Tornado Watch | SPC | Angelina, Chambers, Hardin, Jasper, Jefferson, Liberty and 8 more | 6 hr |
Nearby
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.