Alert archive / Texas / Mesoscale Discussions in 2018

Mesoscale Discussion 178

March 26, 201815 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 26, 2018, 5:44 PM CDT for 15 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Mar 26, 2018, 5:44 PM CDT (22:44 UTC)
Expired: Mar 26, 2018, 7:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Coke County, TX, Crane County, TX, Crockett County, TX, Glasscock County, TX, Irion County, TX, Midland County, TX, Pecos County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Sterling County, TX, Sutton County, TX, Terrell County, TX, Tom Green County, TX, Upton County, TX

The radar

The Midland/Odessa radar (KMAF), 118 km from the middle of the area, began a volume at 22:43 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

Midland Regional, TX (KMAF), launched 12:00Z, 10.7 hours before the alert went out and 119 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: 478 J/kg
Mixed-layer CIN: -138 J/kg
Mixed-layer LCL: 1612 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

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 25, 7:31 PM CDT	Mesoscale Discussion	SPC	Cooke, Montague	59 min
Mar 26, 12:07 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Fisher, Haskell, Jones and 11 more	2 hr
Mar 26, 12:37 PM CDT	Severe Thunderstorm Watch	SPC	Archer, Baylor, Callahan, Clay, Cooke, Fisher and 17 more	8 hr
Mar 26, 2:11 PM CDT	Mesoscale Discussion	SPC	Coke, Crockett, Glasscock, Irion, Pecos, Reagan and 4 more	2 hr
Mar 26, 2:56 PM CDT	Severe Thunderstorm Watch	SPC	Callahan, Coke, Crane, Crockett, Fisher, Glasscock and 19 more	11 hr
Mar 26, 3:31 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Fisher, Haskell, Wichita	59 min
Mar 26, 6:53 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Callahan, Clay, Cooke, Fisher and 16 more	2 hr

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.