Alert archive / Texas / Mesoscale Discussions in 2020

Mesoscale Discussion 192

March 18, 202019 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 18, 2020, 2:07 AM CDT for 19 counties in Texas. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Mar 18, 2020, 2:07 AM CDT (07:07 UTC)
Expired: Mar 18, 2020, 4:00 AM CDT
In force: 113 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Bosque County, TX, Brown 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, Lampasas County, TX, McCulloch County, TX, Mills County, TX, Palo Pinto County, TX, Parker County, TX, San Saba County, TX, Somervell County, TX, Tarrant County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 105 km from the middle of the area, began a volume at 07:07 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, 7.1 hours before the alert went out and 125 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: 307 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 659 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 282 m²/s²
0-3 km storm-relative helicity: 294 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 7.1

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.

Issued	Product	Office	Counties	Lasted
Mar 17, 7:48 PM CDT	Mesoscale Discussion	SPC	Coke, Concho, Crockett, Fisher, Haskell, Irion and 10 more	117 min
Mar 17, 11:11 PM CDT	Mesoscale Discussion	SPC	Archer, Brown, Callahan, Coke, Coleman, Comanche and 22 more	34 min
Mar 18, 2:49 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Brown, Callahan, Clay, Coke and 29 more	116 min
Mar 18, 4:42 PM CDT	Tornado Watch	SPC	Archer, Baylor, Borden, Callahan, Clay, Coke and 39 more	7 hr
Mar 18, 5:37 PM CDT	Mesoscale Discussion	SPC	Jones, Shackelford, Stephens, Throckmorton, Young	113 min
Mar 18, 6:48 PM CDT	Mesoscale Discussion	SPC	Childress, Cottle, Crosby, Dickens, Floyd, Foard and 6 more	117 min

Nearby

Mesoscale Discussions in Texas, 2020 Every mesoscale discussion in 2020

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.