Alert archive / Texas / Mesoscale Discussions in 2018

Mesoscale Discussion 195

March 28, 201819 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 28, 2018, 11:43 PM CDT for 19 counties in Texas. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Mar 28, 2018, 11:43 PM CDT (04:43 UTC)
Expired: Mar 29, 2018, 1:15 AM CDT
In force: 92 min
Issued by: the Storm Prediction Center

Counties Aransas County, TX, Bee County, TX, Brazoria County, TX, Brooks County, TX, Calhoun County, TX, Goliad County, TX, Hidalgo County, TX, Jackson County, TX, Jim Wells County, TX, Kenedy County, TX, Kleberg County, TX, Matagorda County, TX, Nueces County, TX, Refugio County, TX, San Patricio County, TX, Starr County, TX, Victoria County, TX, Wharton County, TX, Willacy County, TX

The radar

The Corpus Christi radar (KCRP), 34 km from the middle of the area, began a volume at 04:44 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

Corpus Christi, TX (KCRP), launched 00:00Z, 4.7 hours before the alert went out and 26 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: 2587 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 645 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 4.7

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
Mar 28, 7:36 PM CDT	Severe Thunderstorm Watch	SPC	Aransas, Atascosa, Bastrop, Bee, Bexar, Brooks and 29 more	7 hr
Mar 28, 8:28 PM CDT	Mesoscale Discussion	SPC	Austin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 17 more	62 min
Mar 29, 3:17 AM CDT	Mesoscale Discussion	SPC	Chambers, Galveston, Jefferson, Orange	58 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.