Alert archive / Texas / Severe Thunderstorm Watches in 2008
Severe Thunderstorm Watch 49
The Storm Prediction Center issued this severe thunderstorm watch at Feb 11, 2008, 7:57 PM CST for 21 counties in Oklahoma; 22 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 11, 2008, 7:57 PM CST (01:57 UTC)
- Expired
- Feb 12, 2008, 2:00 AM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 43 counties
Atoka County, OK, Bryan County, OK, Carter County, OK, Choctaw County, OK, Coal County, OK, Garvin County, OK, Haskell County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Love County, OK, Marshall County, OK, McCurtain County, OK, Murray County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Sequoyah County, OK, Stephens County, OK, Camp County, TX, Collin County, TX, Cooke County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Fannin County, TX, Franklin County, TX, Grayson County, TX, Hopkins County, TX, Hunt County, TX, Jack County, TX, Lamar County, TX, Montague County, TX, Morris County, TX, Palo Pinto County, TX, Parker County, TX, Red River County, TX, Rockwall County, TX, Tarrant County, TX, Titus County, TX, Wise County, TX
The radar
The Norman radar (KTLX), 150 km from the middle of the area, began a volume at 01:56 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
- 5%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 10%
- One or more gusts of 65 knots or more
- 5%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 10%
- 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 |
|---|---|---|---|---|
| Feb 11, 8:48 PM CST | Severe Thunderstorm Warning | OUN | Stephens | 42 min |
| Feb 11, 9:02 PM CST | Severe Thunderstorm Warning | SHV | McCurtain | 28 min |
| Feb 11, 9:27 PM CST | Severe Thunderstorm Warning | OUN | Garvin, Pontotoc | 48 min |
| Feb 11, 9:28 PM CST | Severe Thunderstorm Warning | OUN | Stephens | 47 min |
| Feb 11, 9:33 PM CST | Severe Thunderstorm Warning | TSA | Pushmataha | 27 min |
| Feb 11, 9:40 PM CST | Severe Thunderstorm Warning | SHV | McCurtain | 50 min |
| Feb 11, 11:00 PM CST | Severe Thunderstorm Warning | FWD | Cooke, Montague, Wise | 45 min |
| Feb 12, 1:44 AM CST | Severe Thunderstorm Warning | FWD | Denton | 16 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 2.0 hours before the alert went out and 143 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
- 413 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 343 m²/s²
- 0-3 km storm-relative helicity
- 360 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 11, 10:51 PM CST | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Choctaw, Coal, Johnston and 6 more | 114 min |
| Feb 12, 1:17 AM CST | Mesoscale Discussion | SPC | Atoka, Bryan, Choctaw, McCurtain, Marshall, Pushmataha | 88 min |
| Feb 11, 9:48 PM CST | Severe Thunderstorm Watch | SPC | Bowie, Cass | 4 hr |
| Feb 12, 7:50 AM CST | Mesoscale Discussion | SPC | Angelina, Austin, Brazos, Burleson, Grimes, Hardin and 17 more | 55 min |
| Feb 12, 9:53 AM CST | Mesoscale Discussion | SPC | Jasper, Newton | 67 min |
| Feb 12, 10:25 AM CST | Tornado Watch | SPC | Jasper, Jefferson, Newton, Orange | 7 hr |
| Feb 12, 12:40 PM CST | Mesoscale Discussion | SPC | Jefferson, Orange | 65 min |
Nearby
Severe Thunderstorm Watches in Texas, 2008Severe Thunderstorm Watches in Oklahoma, 2008Every severe thunderstorm watch in 2008
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.