Alert archive / Texas / Mesoscale Discussions in 2018

Mesoscale Discussion 851

June 24, 201818 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 24, 2018, 1:53 AM CDT for 18 counties in Texas. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued: Jun 24, 2018, 1:53 AM CDT (06:53 UTC)
Expired: Jun 24, 2018, 3:00 AM CDT
In force: 67 min
Issued by: the Storm Prediction Center
Chance of a watch: 5%

Counties Bosque County, TX, Comanche County, TX, Dallas County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Hamilton County, TX, Hill County, TX, Hood County, TX, Johnson County, TX, Kaufman County, TX, Navarro County, TX, Palo Pinto County, TX, Parker County, TX, Rockwall County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 50 km from the middle of the area, began a volume at 06:53 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 00:00Z, 6.9 hours before the alert went out and 70 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2014 J/kg
Mixed-layer CIN: -129 J/kg
Mixed-layer LCL: 2041 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

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.

Issued	Product	Office	Counties	Lasted
Jun 23, 7:50 PM CDT	Mesoscale Discussion	SPC	Hardeman, Wilbarger	55 min
Jun 23, 8:33 PM CDT	Mesoscale Discussion	SPC	Coke, Fisher, Haskell, Jones, Mitchell, Nolan and 4 more	117 min
Jun 23, 9:32 PM CDT	Mesoscale Discussion	SPC	Hansford, Hemphill, Lipscomb, Ochiltree, Roberts	118 min
Jun 23, 9:52 PM CDT	Severe Thunderstorm Watch	SPC	Hemphill, Lipscomb, Ochiltree	7 hr
Jun 24, 1:25 AM CDT	Mesoscale Discussion	SPC	Lipscomb	95 min
Jun 24, 7:17 AM CDT	Mesoscale Discussion	SPC	Carson, Gray, Hansford, Hemphill, Hutchinson, Lipscomb and 5 more	118 min
Jun 24, 7:37 AM CDT	Mesoscale Discussion	SPC	Bowie, Red River	113 min
Jun 24, 12:57 PM CDT	Mesoscale Discussion	SPC	Clay, Foard, Hardeman, Wichita, Wilbarger	93 min
Jun 24, 4:18 PM CDT	Mesoscale Discussion	SPC	Bowie, Delta, Fannin, Franklin, Grayson, Hopkins and 3 more	117 min
Jun 24, 4:53 PM CDT	Severe Thunderstorm Watch	SPC	Bowie, Cass, Delta, Fannin, Franklin, Hopkins and 4 more	6 hr
Jun 24, 5:50 PM CDT	Mesoscale Discussion	SPC	Fisher, Glasscock, Howard, Kent, Mitchell, Reagan and 4 more	115 min

Nearby

Mesoscale Discussions in Texas, 2018 Every mesoscale discussion in 2018

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.