Alert archive / Texas / Mesoscale Discussions in 2019

Mesoscale Discussion 435

April 24, 201925 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 24, 2019, 3:47 PM CDT for 25 counties in Texas. It was in force for 43 min.

The area

The outline as issued.

The facts

Issued
Apr 24, 2019, 3:47 PM CDT (20:47 UTC)
Expired
Apr 24, 2019, 4:30 PM CDT
In force
43 min
Issued by
the Storm Prediction Center
Chance of a watch
60%
All 25 counties

Anderson County, TX, Angelina County, TX, Bastrop County, TX, Brazos County, TX, Burleson County, TX, Cherokee County, TX, Falls County, TX, Fayette County, TX, Freestone County, TX, Grimes County, TX, Houston County, TX, Lee County, TX, Leon County, TX, Limestone County, TX, Madison County, TX, Milam County, TX, Montgomery County, TX, Nacogdoches County, TX, Polk County, TX, Robertson County, TX, Rusk County, TX, San Jacinto County, TX, Trinity County, TX, Walker County, TX, Washington County, TX

The radar

The Ft Hood radar (KGRK), 126 km from the middle of the area, began a volume at 20:46 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 8.8 hours before the alert went out and 228 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 2019-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2019-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 181 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1752 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
181 m²/s²
0-3 km storm-relative helicity
126 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Apr 23, 7:58 PM CDTMesoscale DiscussionSPCBrewster, Culberson, Jeff Davis, Loving, Presidio, Reeves and 2 more47 min
Apr 23, 8:35 PM CDTMesoscale DiscussionSPCBrown, Callahan, Coke, Coleman, Comanche, Crane and 23 more55 min
Apr 23, 10:06 PM CDTMesoscale DiscussionSPCBandera, Blanco, Bosque, Brewster, Brown, Burnet and 49 more54 min
Apr 23, 10:42 PM CDTSevere Thunderstorm WatchSPCBosque, Brewster, Brown, Coleman, Collin, Comanche and 32 more6 hr
Apr 23, 11:50 PM CDTMesoscale DiscussionSPCIrion, Reagan, Tom Green85 min
Apr 24, 2:16 AM CDTMesoscale DiscussionSPCBosque, Brewster, Brown, Callahan, Coke, Coleman and 27 more89 min
Apr 24, 10:11 AM CDTMesoscale DiscussionSPCAtascosa, Austin, Bandera, Bastrop, Bee, Bell and 60 more2 hr
Apr 24, 11:51 AM CDTSevere Thunderstorm WatchSPCAtascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 25 more7 hr
Apr 24, 2:31 PM CDTMesoscale DiscussionSPCAtascosa, Austin, Bandera, Bastrop, Bee, Bell and 39 more89 min
Apr 24, 4:49 PM CDTSevere Thunderstorm WatchSPCAustin, Brazos, Burleson, Colorado, Grimes, Houston and 10 more5 hr
Apr 24, 5:23 PM CDTMesoscale DiscussionSPCAransas, Bee, Calhoun, Duval, Goliad, Jackson and 9 more67 min

Nearby

Mesoscale Discussions in Texas, 2019Every mesoscale discussion in 2019

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.