Alert archive / Texas / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 263
The Storm Prediction Center issued this severe thunderstorm watch at May 20, 2001, 11:15 PM CDT for 8 counties in Oklahoma; 26 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 20, 2001, 11:15 PM CDT (04:15 UTC)
- Expired
- May 21, 2001, 4:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 34 counties
Beckham County, OK, Custer County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Roger Mills County, OK, Washita County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Collingsworth County, TX, Deaf Smith County, TX, Donley County, TX, Floyd County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hansford County, TX, Hemphill County, TX, Hutchinson County, TX, Lamb County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Swisher County, TX, Wheeler County, TX
Warnings issued inside it
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 11:45 PM CDT | Severe Thunderstorm Warning | AMA | Ochiltree | 45 min |
| May 21, 12:09 AM CDT | Severe Thunderstorm Warning | AMA | Hemphill | 36 min |
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 00:00Z, 4.3 hours before the alert went out and 26 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
- 887 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 1611 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 90 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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, 9:00 PM CDT | Tornado Watch | SPC | Adair, Cherokee, Delaware, Haskell, Latimer, LeFlore and 5 more | 2 hr |
| May 20, 11:00 PM CDT | Tornado Watch | SPC | Adair, Cherokee, Delaware, Haskell, Latimer, LeFlore and 2 more | 4 hr |
| May 21, 1:45 PM CDT | Severe Thunderstorm Watch | SPC | Hardin, Jasper, Jefferson, Newton, Orange, Panola and 4 more | 5 hr |
| May 21, 3:45 PM CDT | Severe Thunderstorm Watch | SPC | Aransas, Austin, Bee, Brazoria, Calhoun, Chambers and 18 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, 2001Severe Thunderstorm Watches in Oklahoma, 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.