Alert archive / Texas / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 89
The Storm Prediction Center issued this severe thunderstorm watch at Mar 29, 2007, 12:05 PM CDT for 10 counties in Oklahoma; 28 counties in Texas. It took effect at Mar 29, 2007, 12:10 PM CDT. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 29, 2007, 12:05 PM CDT (17:05 UTC)
- In effect from
- Mar 29, 2007, 12:10 PM CDT
- Expired
- Mar 29, 2007, 5:45 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 38 counties
Atoka County, OK, Bryan County, OK, Carter County, OK, Coal County, OK, Garvin County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Pontotoc County, OK, Bell County, TX, Bosque County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Grayson County, TX, Hamilton County, TX, Hill County, TX, Hood County, TX, Jack County, TX, Johnson County, TX, Lampasas County, TX, McLennan County, TX, Mills County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Wise County, TX, Young County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 98 km from the middle of the area, began a volume at 17:06 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
- 20%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 29, 4:40 PM CDT | Flash Flood Warning | FWD | Bosque, Hill | 3 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 5.1 hours before the alert went out and 70 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
- 447 J/kg
- Mixed-layer CIN
- -246 J/kg
- Mixed-layer LCL
- 674 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 290 m²/s²
- 0-3 km storm-relative helicity
- 425 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 28, 7:08 PM CDT | Mesoscale Discussion | SPC | Beaver, Texas | 2 hr |
| Mar 28, 8:52 PM CDT | Mesoscale Discussion | SPC | Beaver, Cimarron, Texas | 113 min |
| Mar 28, 10:58 PM CDT | Mesoscale Discussion | SPC | Beaver, Beckham, Custer, Dewey, Ellis, Greer and 10 more | 62 min |
| Mar 28, 11:22 PM CDT | Tornado Watch | SPC | Beaver, Beckham, Custer, Dewey, Ellis, Greer and 8 more | 6 hr |
| Mar 29, 2:03 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 16 more | 57 min |
| Mar 29, 11:01 AM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Coal, Garvin, Hughes and 7 more | 119 min |
| Mar 29, 3:50 PM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Choctaw, Cleveland, Coal, Creek and 17 more | 85 min |
| Mar 29, 5:44 PM CDT | Tornado Watch | SPC | Adair, Atoka, Bryan, Carter, Cherokee, Choctaw and 28 more | 6 hr |
| Mar 28, 8:51 PM CDT | Tornado Watch | SPC | Andrews, Borden, Coke, Crane, Dawson, Ector and 19 more | 7 hr |
Nearby
Severe Thunderstorm Watches in Texas, 2007Severe Thunderstorm Watches in Oklahoma, 2007Every severe thunderstorm watch in 2007
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.