Alert archive / Texas / Severe Thunderstorm Watches in 2014

Severe Thunderstorm Watch 80

April 14, 201417 parishes in Louisiana; 57 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Apr 14, 2014, 10:34 AM CDT for 17 parishes in Louisiana; 57 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 14, 2014, 10:34 AM CDT (15:34 UTC)
Expired
Apr 14, 2014, 5:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 74 counties

Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Sabine Parish, LA, Union Parish, LA, Webster Parish, LA, Winn Parish, LA, Anderson County, TX, Angelina County, TX, Atascosa County, TX, Austin County, TX, Bastrop County, TX, Bell County, TX, Bexar County, TX, Blanco County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Cherokee County, TX, Colorado County, TX, Comal County, TX, DeWitt County, TX, Falls County, TX, Fayette County, TX, Fort Bend County, TX, Freestone County, TX, Gonzales County, TX, Gregg County, TX, Grimes County, TX, Guadalupe County, TX, Harrison County, TX, Hays County, TX, Henderson County, TX, Houston County, TX, Karnes County, TX, Kendall County, TX, Lavaca County, TX, Lee County, TX, Leon County, TX, Limestone County, TX, Madison County, TX, Marion County, TX, Milam County, TX, Montgomery County, TX, Nacogdoches County, TX, Navarro County, TX, Panola County, TX, Polk County, TX, Robertson County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Smith County, TX, Travis County, TX, Trinity County, TX, Upshur County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX, Williamson County, TX, Wilson County, TX

The radar

The Ft Hood radar (KGRK), 178 km from the middle of the area, began a volume at 15:35 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
20%
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
30%
Six or more combined severe hail and wind reports
60%

Warnings issued inside it

18 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Apr 14, 10:34 AM CDTSevere Thunderstorm WarningFWDFreestone, Limestone56 min
Apr 14, 10:35 AM CDTSevere Thunderstorm WarningEWXTravis40 min
Apr 14, 10:47 AM CDTSevere Thunderstorm WarningEWXDeWitt, Gonzales, Guadalupe, Karnes, Wilson58 min
Apr 14, 10:53 AM CDTSevere Thunderstorm WarningSHVBienville, Claiborne, Lincoln, Union37 min
Apr 14, 11:04 AM CDTSevere Thunderstorm WarningEWXBastrop, Travis41 min
Apr 14, 11:05 AM CDTSevere Thunderstorm WarningSHVGregg, Upshur55 min
Apr 14, 11:31 AM CDTSevere Thunderstorm WarningSHVJackson, Lincoln, Ouachita, Union44 min
Apr 14, 11:46 AM CDTSevere Thunderstorm WarningEWXDeWitt, Gonzales, Lavaca44 min
Apr 14, 11:56 AM CDTSevere Thunderstorm WarningSHVBossier, Caddo64 min
Apr 14, 12:15 PM CDTSevere Thunderstorm WarningEWXAtascosa, Bexar, Frio, Medina45 min
Apr 14, 12:25 PM CDTSevere Thunderstorm WarningEWXDeWitt, Gonzales, Lavaca50 min
Apr 14, 12:34 PM CDTSevere Thunderstorm WarningHGXColorado26 min
Apr 14, 12:56 PM CDTSevere Thunderstorm WarningEWXAtascosa, Bexar, Wilson49 min
Apr 14, 2:03 PM CDTSevere Thunderstorm WarningEWXDeWitt, Gonzales42 min
Apr 14, 2:32 PM CDTSevere Thunderstorm WarningSHVCaldwell28 min
Apr 14, 3:32 PM CDTSevere Thunderstorm WarningHGXColorado, Wharton28 min
Apr 14, 3:56 PM CDTSevere Thunderstorm WarningHGXFort Bend, Wharton34 min
Apr 14, 4:25 PM CDTSevere Thunderstorm WarningHGXBrazoria, Fort Bend, Galveston, Harris50 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

Shreveport, LA (KBAD), launched 12:00Z, 3.6 hours before the alert went out and 222 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.

Skew-T log-pSkew-T log-p diagram, Shreveport, LA at 12:00Z on 2014-04-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2260 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 12:00Z on 2014-04-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 104 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2260 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
648 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
104 m²/s²
0-3 km storm-relative helicity
79 m²/s²
Significant tornado parameter
0.6
Supercell composite
3.5

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 13, 7:54 PM CDTMesoscale DiscussionSPCBienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 11 more66 min
Apr 13, 11:06 PM CDTSevere Thunderstorm WatchSPCBossier, Caddo, Claiborne, Webster6 hr
Apr 14, 1:22 AM CDTMesoscale DiscussionSPCEast Carroll, Franklin, Madison, Morehouse, Ouachita, Richland and 2 more53 min
Apr 14, 1:50 AM CDTTornado WatchSPCEast Carroll, Franklin, Madison, Morehouse, Richland, Tensas and 1 more5 hr
Apr 14, 2:05 AM CDTMesoscale DiscussionSPCBossier, Caddo, Claiborne, Webster85 min
Apr 14, 4:34 AM CDTMesoscale DiscussionSPCFranklin, Madison, Richland, Tensas56 min
Apr 14, 7:42 AM CDTMesoscale DiscussionSPCBeauregard, Natchitoches, Red River, Sabine, Vernon, Winn2 hr
Apr 14, 12:30 PM CDTMesoscale DiscussionSPCAcadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 25 more2 hr
Apr 14, 1:11 PM CDTSevere Thunderstorm WatchSPCAcadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 41 more10 hr
Apr 14, 3:36 PM CDTMesoscale DiscussionSPCAscension, Assumption, Jefferson, Lafourche, Livingston, Orleans and 9 more2 hr

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.