Alert archive / Texas / Tornado Watches in 1999
Tornado Watch 236
The Storm Prediction Center issued this tornado watch at May 9, 1999, 8:00 PM CDT for 38 counties in Texas. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- May 9, 1999, 8:00 PM CDT (01:00 UTC)
- Expired
- May 10, 1999, 12:00 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 38 counties
Archer County, TX, Baylor County, TX, Borden County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crockett County, TX, Dickens County, TX, Edwards County, TX, Fisher County, TX, Glasscock County, TX, Haskell County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Kent County, TX, Kimble County, TX, King County, TX, Knox County, TX, Menard County, TX, Mitchell County, TX, Nolan 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, Young County, TX
The radar
The San Angelo radar (KSJT), 59 km from the middle of the area, began a volume at 01:04 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
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 8:00 PM CDT | Tornado Warning | OUN | Foard, Knox | 45 min |
| May 9, 8:13 PM CDT | Severe Thunderstorm Warning | LUB | Dickens | 47 min |
| May 9, 8:30 PM CDT | Severe Thunderstorm Warning | MAF | Terrell | 30 min |
| May 9, 8:44 PM CDT | Severe Thunderstorm Warning | SJT | Crockett | 61 min |
| May 9, 8:45 PM CDT | Severe Thunderstorm Warning | OUN | Baylor, Foard, Knox | 45 min |
| May 9, 8:58 PM CDT | Severe Thunderstorm Warning | MAF | Terrell | 47 min |
| May 9, 9:21 PM CDT | Severe Thunderstorm Warning | SJT | Concho, Tom Green | 64 min |
| May 9, 9:31 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Knox | 44 min |
| May 9, 10:23 PM CDT | Severe Thunderstorm Warning | SJT | Coleman | 47 min |
| May 9, 11:07 PM CDT | Severe Thunderstorm Warning | EWX | Edwards, Val Verde | 58 min |
| May 9, 11:58 PM CDT | Severe Thunderstorm Warning | EWX | Edwards | 62 min |
The nearest sounding before it
Del Rio, TX (KDRT), launched 00:00Z, 1.0 hours before the alert went out and 194 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
- 4039 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1039 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 2.5
- Supercell composite
- 15.2
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 |
|---|---|---|---|---|
| May 9, 10:30 PM CDT | Severe Thunderstorm Watch | SPC | Archer, Bosque, Brown, Burnet, Callahan, Clay and 38 more | 6 hr |
| May 10, 1:15 AM CDT | Severe Thunderstorm Watch | SPC | Anderson, Bell, Blanco, Brazos, Burleson, Ellis and 17 more | 6 hr |
| May 10, 7:45 AM CDT | Severe Thunderstorm Watch | SPC | Jasper, Jefferson, Newton, Orange, Sabine, San Augustine and 1 more | 5 hr |
| May 10, 8:30 AM CDT | Tornado Watch | SPC | Jasper, Newton, Orange, Sabine | 6 hr |
| May 10, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | Archer, Baylor, Brown, Callahan, Clay, Coleman and 15 more | 5 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.