Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 1002

June 4, 20076 parishes in Louisiana; 41 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 4, 2007, 5:30 PM CDT for 6 parishes in Louisiana; 41 counties in Texas. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
Jun 4, 2007, 5:30 PM CDT (22:30 UTC)
Expired
Jun 4, 2007, 7:00 PM CDT
In force
90 min
Issued by
the Storm Prediction Center
All 47 counties

Allen Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Jefferson Davis Parish, LA, Vernon Parish, LA, Austin County, TX, Bastrop County, TX, Bell County, TX, Blanco County, TX, Brazos County, TX, Burleson County, TX, Burnet County, TX, Caldwell County, TX, Chambers County, TX, Colorado County, TX, Comal County, TX, Fayette County, TX, Gillespie County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Hays County, TX, Houston County, TX, Jasper County, TX, Jefferson County, TX, Kendall County, TX, Lampasas County, TX, Lee County, TX, Leon County, TX, Liberty County, TX, Llano County, TX, Madison County, TX, Milam County, TX, Montgomery County, TX, Newton County, TX, Orange County, TX, Polk County, TX, Robertson County, TX, San Jacinto County, TX, Travis County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 103 km from the middle of the area, began a volume at 22:30 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.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 10.5 hours before the alert went out and 278 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, Fort Worth, TX at 12:00Z on 2007-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 225 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, Fort Worth, TX at 12:00Z on 2007-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 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
225 J/kg
Mixed-layer CIN
-102 J/kg
Mixed-layer LCL
1669 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
-10 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 4, 11:43 AM CDTMesoscale DiscussionSPCAcadia, Ascension, Assumption, Beauregard, Calcasieu, Cameron and 8 more92 min
Jun 4, 2:24 PM CDTSevere Thunderstorm WatchSPCAllen, Beauregard, Calcasieu, Cameron, Jefferson Davis, Vernon6 hr
Jun 3, 7:10 PM CDTSevere Thunderstorm WatchSPCBailey, Castro, Cochran, Hale, Hockley, Lamb and 6 more4 hr
Jun 3, 7:12 PM CDTMesoscale DiscussionSPCAtascosa, Bandera, Bee, Bexar, Dimmit, Edwards and 13 more63 min
Jun 3, 7:32 PM CDTSevere Thunderstorm WatchSPCAtascosa, Bandera, Bexar, DeWitt, Dimmit, Edwards and 10 more4 hr
Jun 3, 9:22 PM CDTMesoscale DiscussionSPCAustin, Bastrop, Blanco, Brazoria, Brazos, Burleson and 26 more53 min
Jun 3, 11:13 PM CDTMesoscale DiscussionSPCBriscoe, Childress, Cottle, Dickens, Foard, Hall and 4 more2 hr
Jun 3, 11:34 PM CDTMesoscale DiscussionSPCAtascosa, Austin, Bandera, Bexar, Brazoria, Chambers and 23 more116 min
Jun 4, 6:57 PM CDTMesoscale DiscussionSPCAtascosa, Bee, Bexar, DeWitt, Dimmit, Frio and 15 more93 min

Nearby

Mesoscale Discussions in Texas, 2007Mesoscale Discussions in Louisiana, 2007Every mesoscale discussion 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.