Alert archive / Texas / Mesoscale Discussions in 2019

Mesoscale Discussion 587

May 8, 201936 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 8, 2019, 12:21 PM CDT for 36 counties in Texas. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
May 8, 2019, 12:21 PM CDT (17:21 UTC)
Expired
May 8, 2019, 1:45 PM CDT
In force
84 min
Issued by
the Storm Prediction Center
All 36 counties

Anderson County, TX, Angelina County, TX, Austin 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, Hardin County, TX, Harris County, TX, Houston County, TX, Jasper County, TX, Lee County, TX, Leon County, TX, Liberty County, TX, Limestone County, TX, Madison County, TX, Milam County, TX, Montgomery County, TX, Nacogdoches County, TX, Polk County, TX, Robertson County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby 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), 141 km from the middle of the area, began a volume at 17:25 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, 5.4 hours before the alert went out and 262 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 2019-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 83 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 2019-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 734 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
83 J/kg
Mixed-layer CIN
-555 J/kg
Mixed-layer LCL
671 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
734 m²/s²
0-3 km storm-relative helicity
882 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 7, 8:25 PM CDTMesoscale DiscussionSPCArmstrong, Briscoe, Carson, Castro, Childress, Collingsworth and 21 more95 min
May 7, 9:13 PM CDTTornado WatchSPCArcher, Baylor, Clay, Foard, Hardeman, Knox and 2 more8 hr
May 7, 9:38 PM CDTMesoscale DiscussionSPCArmstrong, Briscoe, Carson, Castro, Collingsworth, Deaf Smith and 16 more67 min
May 7, 10:02 PM CDTMesoscale DiscussionSPCAndrews, Bailey, Borden, Briscoe, Castro, Cochran and 43 more58 min
May 7, 10:58 PM CDTSevere Thunderstorm WatchSPCBrown, Callahan, Coke, Coleman, Concho, Crockett and 18 more8 hr
May 8, 12:56 AM CDTMesoscale DiscussionSPCBosque, Collin, Comanche, Cooke, Coryell, Dallas and 20 more64 min
May 8, 6:29 AM CDTMesoscale DiscussionSPCAnderson, Bandera, Bastrop, Bell, Blanco, Bosque and 38 more61 min
May 8, 6:54 AM CDTSevere Thunderstorm WatchSPCBandera, Bell, Blanco, Bosque, Brown, Burnet and 28 more6 hr
May 8, 10:11 AM CDTMesoscale DiscussionSPCBandera, Bell, Blanco, Bosque, Brown, Burnet and 28 more2 hr
May 8, 12:58 PM CDTSevere Thunderstorm WatchSPCAnderson, Bastrop, Brazos, Burleson, Caldwell, Fayette and 13 more5 hr
May 8, 2:07 PM CDTMesoscale DiscussionSPCAngelina, Brazoria, Chambers, Fort Bend, Hardin, Harris and 16 more53 min
May 8, 2:16 PM CDTTornado WatchSPCAngelina, Bowie, Brazos, Burleson, Cass, Cherokee and 21 more6 hr
May 8, 3:47 PM CDTMesoscale DiscussionSPCArmstrong, Briscoe, Carson, Childress, Collingsworth, Dallam and 19 more118 min
May 8, 3:48 PM CDTMesoscale DiscussionSPCHardin, Jasper, Newton, Orange, Sabine, San Augustine and 2 more117 min
May 8, 5:55 PM CDTMesoscale DiscussionSPCJasper, Newton95 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.