Alert archive / Texas / Severe Thunderstorm Watches in 2009
Severe Thunderstorm Watch 331
The Storm Prediction Center issued this severe thunderstorm watch at Jun 4, 2009, 6:42 PM CDT for 12 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 4, 2009, 6:42 PM CDT (23:42 UTC)
- Expired
- Jun 4, 2009, 11:43 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Bailey County, TX, Castro County, TX, Cochran County, TX, Hale County, TX, Hockley County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Parmer County, TX, Swisher County, TX, Terry County, TX, Yoakum County, TX
The radar
The Lubbock radar (KLBB), 68 km from the middle of the area, began a volume at 23:44 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 70%
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 |
|---|---|---|---|---|
| Jun 4, 6:59 PM CDT | Severe Thunderstorm Warning | LUB | Bailey, Castro, Lamb, Parmer | 61 min |
| Jun 4, 7:08 PM CDT | Severe Thunderstorm Warning | LUB | Castro, Lamb, Parmer, Swisher | 52 min |
| Jun 4, 8:01 PM CDT | Severe Thunderstorm Warning | LUB | Bailey, Castro, Floyd, Hale, Lamb, Parmer and 1 more | 59 min |
| Jun 4, 8:54 PM CDT | Severe Thunderstorm Warning | LUB | Bailey, Cochran, Hockley, Lamb | 66 min |
| Jun 4, 9:04 PM CDT | Severe Thunderstorm Warning | LUB | Hale, Lubbock | 56 min |
| Jun 4, 9:15 PM CDT | Severe Thunderstorm Warning | LUB | Hockley, Lubbock, Lynn, Terry | 60 min |
| Jun 4, 10:13 PM CDT | Severe Thunderstorm Warning | LUB | Hockley, Lubbock, Lynn, Terry | 62 min |
| Jun 4, 11:16 PM CDT | Severe Thunderstorm Warning | LUB | Lynn, Terry | 22 min |
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 12:00Z, 11.7 hours before the alert went out and 135 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1281 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 3, 7:42 PM CDT | Mesoscale Discussion | SPC | Brooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Kleberg and 3 more | 93 min |
| Jun 4, 1:41 PM CDT | Mesoscale Discussion | SPC | Dallam, Hartley | 64 min |
| Jun 4, 2:27 PM CDT | Severe Thunderstorm Watch | SPC | Dallam, Deaf Smith, Hartley, Moore, Oldham, Potter and 2 more | 8 hr |
| Jun 4, 3:26 PM CDT | Mesoscale Discussion | SPC | Culberson, Jeff Davis, Loving, Reeves, Ward | 64 min |
| Jun 4, 6:16 PM CDT | Mesoscale Discussion | SPC | Dallam, Deaf Smith, Hartley, Moore, Oldham, Potter and 2 more | 89 min |
Nearby
Severe Thunderstorm Watches in Texas, 2009Every severe thunderstorm watch in 2009
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.