Alert archive / Texas / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 267
The Storm Prediction Center issued this severe thunderstorm watch at May 21, 2001, 3:45 PM CDT for 24 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 21, 2001, 3:45 PM CDT (20:45 UTC)
- Expired
- May 21, 2001, 9:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 24 counties
Aransas County, TX, Austin County, TX, Bee County, TX, Brazoria County, TX, Calhoun County, TX, Chambers County, TX, Colorado County, TX, DeWitt County, TX, Fort Bend County, TX, Goliad County, TX, Harris County, TX, Jackson County, TX, Lavaca County, TX, Liberty County, TX, Matagorda County, TX, Montgomery County, TX, Nueces County, TX, Polk County, TX, Refugio County, TX, San Jacinto County, TX, San Patricio County, TX, Victoria County, TX, Waller County, TX, Wharton County, TX
The radar
The Austin/San Antonio radar (KEWX), 151 km from the middle of the area, began a volume at 20:44 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
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 3:58 PM CDT | Severe Thunderstorm Warning | HGX | Chambers, Harris | 47 min |
| May 21, 4:41 PM CDT | Severe Thunderstorm Warning | CRP | Bee, Live Oak | 64 min |
| May 21, 6:19 PM CDT | Severe Thunderstorm Warning | CRP | Refugio | 56 min |
| May 21, 6:56 PM CDT | Severe Thunderstorm Warning | CRP | San Patricio | 64 min |
| May 21, 8:39 PM CDT | Severe Thunderstorm Warning | CRP | Kleberg, Nueces | 66 min |
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 8.8 hours before the alert went out and 167 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
- 1153 J/kg
- Mixed-layer CIN
- -306 J/kg
- Mixed-layer LCL
- 718 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 253 m²/s²
- 0-3 km storm-relative helicity
- 248 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
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 |
|---|---|---|---|---|
| May 20, 11:15 PM CDT | Severe Thunderstorm Watch | SPC | Armstrong, Briscoe, Carson, Castro, Childress, Collingsworth and 20 more | 5 hr |
| May 21, 1:45 PM CDT | Severe Thunderstorm Watch | SPC | Hardin, Jasper, Jefferson, Newton, Orange, Panola and 4 more | 5 hr |
| May 21, 5:15 PM CDT | Severe Thunderstorm Watch | SPC | Brooks, Cameron, Duval, Hidalgo, Jim Hogg, Kenedy and 4 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; radar from the NEXRAD Level II archive.