Alert archive / Texas / Tornado Watches in 1999
Tornado Watch 207
The Storm Prediction Center issued this tornado watch at May 4, 1999, 5:00 AM CDT for 52 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 4, 1999, 5:00 AM CDT (10:00 UTC)
- Expired
- May 4, 1999, 11:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 52 counties
Archer County, TX, Baylor County, TX, Blanco County, TX, Bosque County, TX, Brown County, TX, Burnet County, TX, Callahan County, TX, Clay County, TX, Coleman County, TX, Comanche County, TX, Concho County, TX, Cooke County, TX, Coryell County, TX, Denton County, TX, Eastland County, TX, Edwards County, TX, Erath County, TX, Gillespie County, TX, Grayson County, TX, Hamilton County, TX, Haskell County, TX, Hood County, TX, Jack County, TX, Johnson County, TX, Jones County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Knox County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Mills County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Runnels County, TX, San Saba County, TX, Schleicher County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Sutton County, TX, Tarrant County, TX, Taylor 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), 105 km from the middle of the area, began a volume at 10:01 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
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 5:08 AM CDT | Tornado Warning | SJT | Menard | 42 min |
| May 4, 5:48 AM CDT | Tornado Warning | SJT | Mason, Menard | 47 min |
| May 4, 6:32 AM CDT | Tornado Warning | SJT | Mason | 48 min |
| May 4, 7:57 AM CDT | Severe Thunderstorm Warning | OUN | Foard, Knox | 48 min |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 10.0 hours before the alert went out and 249 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
- 2685 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 1189 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 143 m²/s²
- 0-3 km storm-relative helicity
- 204 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 14.3
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 |
|---|---|---|---|---|
| May 3, 7:15 PM CDT | Tornado Watch | SPC | Wichita | 5 hr |
| May 3, 7:30 PM CDT | Tornado Watch | SPC | Archer, Baylor, Callahan, Clay, Cooke, Eastland and 19 more | 5 hr |
| May 3, 10:45 PM CDT | Tornado Watch | SPC | Archer, Baylor, Bosque, Brown, Callahan, Clay and 30 more | 6 hr |
| May 3, 11:30 PM CDT | Tornado Watch | SPC | Anderson, Camp, Collin, Dallas, Delta, Ellis and 21 more | 6 hr |
| May 4, 3:00 AM CDT | Tornado Watch | SPC | Bandera, Brown, Burnet, Concho, Coryell, Crockett and 18 more | 2 hr |
| May 4, 5:00 AM CDT | Tornado Watch | SPC | Foard, Hardeman, Wichita, Wilbarger | 6 hr |
| May 4, 11:00 AM CDT | Tornado Watch | SPC | Collin, Cooke, Dallas, Delta, Denton, Fannin and 16 more | 5 hr |
| May 4, 3:00 PM CDT | Tornado Watch | SPC | Anderson, Bowie, Camp, Cass, Cherokee, Delta and 22 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.