Alert archive / Texas / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 97
The Storm Prediction Center issued this severe thunderstorm watch at Mar 30, 2007, 10:28 PM CDT for 8 counties in Arkansas; Bossier Parish, Caddo Parish, Louisiana; 16 counties in Texas. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 30, 2007, 10:28 PM CDT (03:28 UTC)
- Expired
- Mar 31, 2007, 6:00 AM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 50 kt
All 26 counties
Columbia County, AR, Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Sevier County, AR, Bossier Parish, LA, Caddo Parish, LA, Bowie County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Marion County, TX, Morris County, TX, Panola County, TX, Red River County, TX, Rusk County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Wood County, TX
The radar
The Shreveport radar (KSHV), 93 km from the middle of the area, began a volume at 03:27 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
- 10%
- Ten or more severe hail reports
- 10%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 60%
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 31, 12:30 AM CDT | Flash Flood Warning | SHV | Franklin, Wood | 4 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
Shreveport, LA (KSHV), launched 00:00Z, 3.5 hours before the alert went out and 97 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
- 72 J/kg
- Mixed-layer CIN
- -166 J/kg
- Mixed-layer LCL
- 1404 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 125 m²/s²
- 0-3 km storm-relative helicity
- 200 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 |
|---|---|---|---|---|
| Mar 30, 7:12 PM CDT | Mesoscale Discussion | SPC | Benton, Crawford, Sebastian, Washington | 63 min |
| Mar 30, 10:06 PM CDT | Mesoscale Discussion | SPC | Clark, Columbia, Dallas, Garland, Grant, Hempstead and 14 more | 84 min |
| Mar 31, 2:40 AM CDT | Mesoscale Discussion | SPC | Columbia, Hempstead, Howard, Lafayette, Little River, Miller and 2 more | 95 min |
| Mar 31, 11:03 AM CDT | Mesoscale Discussion | SPC | Ashley, Bradley, Chicot, Crittenden, Cross, Desha and 6 more | 57 min |
| Mar 31, 7:08 AM CDT | Mesoscale Discussion | SPC | Acadia, Calcasieu, Cameron, Jefferson Davis, Lafayette, Vermilion | 67 min |
| Mar 31, 8:40 AM CDT | Severe Thunderstorm Watch | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 15 more | 5 hr |
| Mar 31, 12:08 PM CDT | Mesoscale Discussion | SPC | Ascension, Assumption, Avoyelles, Catahoula, Concordia, East Baton Rouge and 25 more | 97 min |
| Mar 30, 7:38 PM CDT | Mesoscale Discussion | SPC | Anderson, Atascosa, Bandera, Bastrop, Bell, Bexar and 74 more | 2 hr |
| Mar 30, 9:48 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bastrop, Bell, Bexar, Blanco and 49 more | 117 min |
| Mar 30, 11:53 PM CDT | Mesoscale Discussion | SPC | Anderson, Atascosa, Bandera, Bastrop, Bell, Bexar and 45 more | 67 min |
| Mar 31, 2:12 AM CDT | Mesoscale Discussion | SPC | Aransas, Atascosa, Austin, Bastrop, Bee, Brazoria and 32 more | 93 min |
| Mar 31, 3:17 AM CDT | Tornado Watch | SPC | Aransas, Austin, Bee, Brazoria, Calhoun, Chambers and 17 more | 7 hr |
| Mar 31, 5:30 AM CDT | Mesoscale Discussion | SPC | Aransas, Austin, Bee, Brazoria, Calhoun, Chambers and 16 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Texas, 2007Severe Thunderstorm Watches in Arkansas, 2007Severe Thunderstorm Watches in Louisiana, 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.