Alert archive / Texas / Tornado Watches in 1999
Tornado Watch 150
The Storm Prediction Center issued this tornado watch at Apr 13, 1999, 7:00 PM CDT for 9 counties in Oklahoma; 24 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 13, 1999, 7:00 PM CDT (00:00 UTC)
- Expired
- Apr 14, 1999, 12:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 33 counties
Beckham County, OK, Caddo County, OK, Comanche County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Tillman County, OK, Washita County, OK, Baylor County, TX, Briscoe County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Kent County, TX, King County, TX, Knox County, TX, Lubbock County, TX, Lynn County, TX, Motley County, TX, Stonewall County, TX, Wheeler County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Lubbock radar (KLBB), 124 km from the middle of the area, began a volume at 00:04 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
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 7:17 PM CDT | Severe Thunderstorm Warning | LUB | Garza | 28 min |
The nearest sounding before it
Midland Regional, TX (KMAF), launched 00:00Z, 0.0 hours before the alert went out and 271 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, 9:15 PM CDT | Tornado Watch | SPC | Brown, Callahan, Coke, Coleman, Comanche, Concho and 31 more | 6 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
Tornado Watches in Texas, 1999Tornado Watches in Oklahoma, 1999Every tornado watch in 1999
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.