Alert archive / Texas / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 186

May 11, 20046 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at May 11, 2004, 3:50 PM CDT for 6 counties in Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
May 11, 2004, 3:50 PM CDT (20:50 UTC)
Expired
May 11, 2004, 7:00 PM CDT
In force
3 hr
Issued by
the Storm Prediction Center

Counties Chambers County, TX, Hardin County, TX, Harris County, TX, Jefferson County, TX, Liberty County, TX, Orange County, TX

The radar

The Houston radar (KHGX), 74 km from the middle of the area, began a volume at 20:52 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 11, 5:34 PM CDTSevere Thunderstorm WarningLCHJefferson56 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 12:00Z, 8.8 hours before the alert went out and 142 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, Lake Charles Mun, LA at 12:00Z on 2004-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1064 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, Lake Charles Mun, LA at 12:00Z on 2004-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 square meters per square second.1939Sfc1 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
1064 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
715 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
34 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 10, 7:43 PM CDTMesoscale DiscussionSPCArmstrong, Bailey, Borden, Briscoe, Carson, Castro and 38 more2 hr
May 11, 9:37 AM CDTMesoscale DiscussionSPCAransas, Austin, Bee, Brazoria, Chambers, Colorado and 17 more113 min
May 11, 10:05 AM CDTMesoscale DiscussionSPCBee, Duval, Goliad, Jim Wells, Live Oak, McMullen and 2 more115 min
May 11, 10:55 AM CDTSevere Thunderstorm WatchSPCAransas, Atascosa, Austin, Bastrop, Bee, Brazoria and 33 more5 hr
May 11, 2:00 PM CDTMesoscale DiscussionSPCDallam, Hansford, Hartley, Hutchinson, Moore, Oldham and 1 more2 hr
May 11, 2:33 PM CDTMesoscale DiscussionSPCCrane, Crockett, Glasscock, Irion, Midland, Pecos and 3 more117 min
May 11, 2:58 PM CDTMesoscale DiscussionSPCBrazoria, Fort Bend, Harris, Matagorda62 min
May 11, 3:00 PM CDTMesoscale DiscussionSPCBrazoria, Fort Bend, Harris, Matagorda60 min
May 11, 4:05 PM CDTSevere Thunderstorm WatchSPCArmstrong, Bailey, Briscoe, Carson, Castro, Childress and 38 more6 hr
May 11, 6:03 PM CDTMesoscale DiscussionSPCChambers, Hardin, Jefferson, Liberty, Orange57 min

Nearby

Severe Thunderstorm Watches in Texas, 2004Every severe thunderstorm watch in 2004

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.