Alert archive / Texas / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 55
The Storm Prediction Center issued this severe thunderstorm watch at Mar 12, 2001, 2:00 AM CST for 35 counties in Texas. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 12, 2001, 2:00 AM CST (08:00 UTC)
- Expired
- Mar 12, 2001, 6:00 AM CST
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 35 counties
Angelina County, TX, Austin County, TX, Bastrop County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Colorado County, TX, DeWitt County, TX, Fayette County, TX, Gonzales County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Houston County, TX, Lavaca County, TX, Lee County, TX, Leon County, TX, Liberty County, TX, Madison County, TX, Milam County, TX, Montgomery County, TX, Nacogdoches County, TX, Panola County, TX, Polk County, TX, Robertson County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Travis County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Williamson County, TX
Warnings issued inside it
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 12, 2:32 AM CST | Severe Thunderstorm Warning | HGX | Burleson, Washington | 58 min |
| Mar 12, 3:08 AM CST | Severe Thunderstorm Warning | HGX | Brazos, Grimes, Madison | 67 min |
| Mar 12, 3:39 AM CST | Severe Thunderstorm Warning | HGX | Washington | 36 min |
| Mar 12, 3:40 AM CST | Severe Thunderstorm Warning | SHV | Panola | 65 min |
| Mar 12, 4:19 AM CST | Severe Thunderstorm Warning | SHV | Shelby | 41 min |
| Mar 12, 4:21 AM CST | Severe Thunderstorm Warning | HGX | Montgomery | 39 min |
| Mar 12, 4:42 AM CST | Severe Thunderstorm Warning | HGX | San Jacinto, Walker | 78 min |
| Mar 12, 4:58 AM CST | Severe Thunderstorm Warning | HGX | Montgomery | 32 min |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 8.0 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
- 1045 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 503 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 149 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 2.8
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, 11:00 PM CST | Severe Thunderstorm Watch | SPC | Bandera, Bexar, Comal, Edwards, Guadalupe, Hays and 9 more | 5 hr |
| Mar 12, 3:30 AM CST | Severe Thunderstorm Watch | SPC | Cass, Harrison, Marion, Panola, Shelby | 6 hr |
| Mar 12, 5:00 AM CST | Severe Thunderstorm Watch | SPC | Angelina, Hardin, Jasper, Jefferson, Liberty, Newton and 5 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Texas, 2001Every severe thunderstorm watch in 2001
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.