Alert archive / Texas / Severe Thunderstorm Watches in 2014
Severe Thunderstorm Watch 520
The Storm Prediction Center issued this severe thunderstorm watch at Oct 2, 2014, 8:04 PM CDT for 11 parishes in Louisiana; 44 counties in Texas. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Oct 2, 2014, 8:04 PM CDT (01:04 UTC)
- Expired
- Oct 3, 2014, 3:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 65 kt
All 55 counties
Beauregard Parish, LA, Caldwell Parish, LA, De Soto Parish, LA, Grant Parish, LA, LaSalle Parish, LA, Natchitoches Parish, LA, Rapides Parish, LA, Red River Parish, LA, Sabine Parish, LA, Vernon Parish, LA, Winn Parish, LA, Angelina County, TX, Austin County, TX, Bastrop County, TX, Blanco County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Chambers County, TX, Colorado County, TX, Comal County, TX, DeWitt County, TX, Fayette County, TX, Fort Bend County, TX, Galveston County, TX, Gonzales County, TX, Grimes County, TX, Guadalupe County, TX, Hardin County, TX, Harris County, TX, Hays County, TX, Houston County, TX, Jasper County, TX, Lavaca County, TX, Lee County, TX, Liberty County, TX, Madison County, TX, Montgomery County, TX, Nacogdoches County, TX, Newton County, TX, Panola County, TX, Polk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Travis County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX, Williamson County, TX
The radar
The Houston radar (KHGX), 119 km from the middle of the area, began a volume at 01:07 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
- 40%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 2, 8:20 PM CDT | Severe Thunderstorm Warning | SHV | Harrison, Panola, Rusk, Shelby | 40 min |
| Oct 2, 8:36 PM CDT | Severe Thunderstorm Warning | HGX | Houston | 54 min |
| Oct 2, 9:02 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, Bossier, Caddo, Claiborne, De Soto, Lincoln and 2 more | 43 min |
| Oct 2, 9:15 PM CDT | Severe Thunderstorm Warning | SHV | De Soto, Sabine | 60 min |
| Oct 2, 9:16 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Grimes, Houston, Madison, San Jacinto, Trinity and 1 more | 59 min |
| Oct 2, 9:29 PM CDT | Severe Thunderstorm Warning | HGX | Houston | 46 min |
| Oct 2, 9:34 PM CDT | Severe Thunderstorm Warning | EWX | Travis, Williamson | 23 min |
| Oct 2, 9:43 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, Claiborne, Jackson, Lincoln, Natchitoches, Ouachita and 3 more | 47 min |
| Oct 2, 9:50 PM CDT | Severe Thunderstorm Warning | SHV | De Soto, Natchitoches, Red River, Sabine | 40 min |
| Oct 2, 10:08 PM CDT | Severe Thunderstorm Warning | HGX | Burleson | 67 min |
| Oct 2, 10:27 PM CDT | Severe Thunderstorm Warning | SHV | Sabine | 63 min |
| Oct 2, 10:41 PM CDT | Severe Thunderstorm Warning | LCH | Jasper, Newton, Tyler | 64 min |
| Oct 2, 11:44 PM CDT | Severe Thunderstorm Warning | LCH | Beauregard, Vernon | 61 min |
| Oct 3, 12:30 AM CDT | Severe Thunderstorm Warning | LCH | Beauregard, Calcasieu | 30 min |
| Oct 3, 12:45 AM CDT | Severe Thunderstorm Warning | LCH | Allen, Avoyelles, Beauregard, Evangeline, Rapides, Vernon | 60 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
Lake Charles Mun, LA (KLCH), launched 00:00Z, 1.1 hours before the alert went out and 244 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
- 2657 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 674 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 98 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 6.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 2, 7:33 PM CDT | Mesoscale Discussion | SPC | Allen, Beauregard, Calcasieu, Caldwell, De Soto, Evangeline and 9 more | 57 min |
| Oct 2, 7:35 PM CDT | Mesoscale Discussion | SPC | Bossier, Claiborne, Morehouse, Union, Webster, West Carroll | 115 min |
| Oct 2, 9:26 PM CDT | Mesoscale Discussion | SPC | East Carroll, Madison, Morehouse, West Carroll | 2 hr |
| Oct 2, 10:11 PM CDT | Tornado Watch | SPC | Catahoula, Concordia, Franklin, Madison, Richland, Tensas | 5 hr |
| Oct 2, 11:05 PM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 23 more | 55 min |
| Oct 2, 11:36 PM CDT | Severe Thunderstorm Watch | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Calcasieu and 18 more | 5 hr |
| Oct 2, 11:50 PM CDT | Mesoscale Discussion | SPC | Catahoula, Concordia, East Carroll, Franklin, Madison, Richland and 2 more | 115 min |
Nearby
Severe Thunderstorm Watches in Texas, 2014Severe Thunderstorm Watches in Louisiana, 2014Every severe thunderstorm watch in 2014
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.