Alert archive / Texas / Mesoscale Discussions in 2024

Mesoscale Discussion 739

May 9, 202421 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 9, 2024, 9:37 PM CDT for 21 counties in Texas. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued
May 9, 2024, 9:37 PM CDT (02:37 UTC)
Expired
May 9, 2024, 10:30 PM CDT
In force
53 min
Issued by
the Storm Prediction Center
Concerning
Severe thunderstorm watch 224
All 21 counties

Angelina County, TX, Austin County, TX, Bastrop County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Colorado County, TX, Fayette County, TX, Grimes County, TX, Guadalupe County, TX, Lee County, TX, Madison County, TX, Montgomery County, TX, Polk County, TX, Robertson County, TX, San Jacinto County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Washington County, TX

The radar

The Ft Hood radar (KGRK), 130 km from the middle of the area, began a volume at 02:40 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

Corpus Christi, TX (KCRP), launched 00:00Z, 2.6 hours before the alert went out and 305 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, Corpus Christi, TX at 00:00Z on 2024-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4817 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, Corpus Christi, TX at 00:00Z on 2024-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 square meters per square second.19395878Sfc1 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
4817 J/kg
Mixed-layer CIN
-246 J/kg
Mixed-layer LCL
880 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
27 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 9, 8:03 PM CDTMesoscale DiscussionSPCAnderson, Angelina, Bastrop, Bell, Blanco, Brazos and 27 more87 min
May 9, 8:13 PM CDTSevere Thunderstorm WatchSPCHardin, Jasper, Newton, Tyler6 hr
May 9, 10:00 PM CDTMesoscale DiscussionSPCHardin, Jasper, Newton, Orange, Sabine, Tyler90 min

Nearby

Mesoscale Discussions in Texas, 2024Every mesoscale discussion in 2024

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.