Alert archive / Texas / Tornado Watches in 1999
Tornado Watch 83
The Storm Prediction Center issued this tornado watch at Mar 12, 1999, 10:45 AM CST for 38 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 12, 1999, 10:45 AM CST (16:45 UTC)
- Expired
- Mar 12, 1999, 5:00 PM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 38 counties
Austin County, TX, Bastrop County, TX, Bell County, TX, Blanco County, TX, Brazos County, TX, Brown County, TX, Burleson County, TX, Burnet County, TX, Caldwell County, TX, Coleman County, TX, Colorado County, TX, Comal County, TX, Concho County, TX, Coryell County, TX, Fayette County, TX, Gillespie County, TX, Grimes County, TX, Hays County, TX, Kendall County, TX, Kimble County, TX, Lampasas County, TX, Lavaca County, TX, Lee County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Milam County, TX, Mills County, TX, Robertson County, TX, Runnels County, TX, San Saba County, TX, Schleicher County, TX, Sutton County, TX, Tom Green County, TX, Travis County, TX, Washington County, TX, Williamson County, TX
The radar
The Ft Hood radar (KGRK), 127 km from the middle of the area, began a volume at 16:46 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
16 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 12, 10:53 AM CST | Severe Thunderstorm Warning | SJT | San Saba | 32 min |
| Mar 12, 10:57 AM CST | Severe Thunderstorm Warning | FWD | Lampasas | 48 min |
| Mar 12, 11:09 AM CST | Severe Thunderstorm Warning | EWX | Burnet, Williamson | 41 min |
| Mar 12, 11:29 AM CST | Severe Thunderstorm Warning | SJT | Tom Green | 66 min |
| Mar 12, 11:40 AM CST | Severe Thunderstorm Warning | FWD | Lampasas | 50 min |
| Mar 12, 12:09 PM CST | Severe Thunderstorm Warning | SJT | Coleman | 66 min |
| Mar 12, 12:39 PM CST | Severe Thunderstorm Warning | EWX | Burnet | 46 min |
| Mar 12, 12:40 PM CST | Severe Thunderstorm Warning | FWD | Bell | 50 min |
| Mar 12, 1:19 PM CST | Severe Thunderstorm Warning | SJT | Coleman, McCulloch | 61 min |
| Mar 12, 2:06 PM CST | Severe Thunderstorm Warning | SJT | San Saba | 64 min |
| Mar 12, 2:16 PM CST | Severe Thunderstorm Warning | FWD | Bell | 29 min |
| Mar 12, 2:33 PM CST | Tornado Warning | SJT | San Saba | 77 min |
| Mar 12, 3:39 PM CST | Severe Thunderstorm Warning | EWX | Burnet | 61 min |
| Mar 12, 3:50 PM CST | Severe Thunderstorm Warning | SJT | San Saba | 35 min |
| Mar 12, 4:03 PM CST | Severe Thunderstorm Warning | EWX | Llano | 62 min |
| Mar 12, 4:45 PM CST | Severe Thunderstorm Warning | EWX | Burnet | 60 min |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 4.8 hours before the alert went out and 242 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
- 2 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 511 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 288 m²/s²
- 0-3 km storm-relative helicity
- 416 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.9
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 |
|---|---|---|---|---|
| Mar 11, 8:45 PM CST | Severe Thunderstorm Watch | SPC | Baylor, Childress, Collingsworth, Cottle, Dickens, Foard and 12 more | 5 hr |
| Mar 12, 6:00 AM CST | Severe Thunderstorm Watch | SPC | Archer, Baylor, Brown, Callahan, Clay, Coke and 35 more | 5 hr |
| Mar 12, 10:45 AM CST | Severe Thunderstorm Watch | SPC | Anderson, Archer, Baylor, Bosque, Brown, Callahan and 47 more | 6 hr |
| Mar 12, 3:45 PM CST | Tornado Watch | SPC | Atascosa, Bandera, Bastrop, Bell, Bexar, Blanco and 33 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.