Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 1044

June 17, 201517 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 17, 2015, 3:01 AM CDT for 17 counties in Texas. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Jun 17, 2015, 3:01 AM CDT (08:01 UTC)
Expired: Jun 17, 2015, 5:00 AM CDT
In force: 119 min
Issued by: the Storm Prediction Center

Counties Austin County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Colorado County, TX, Fort Bend County, TX, Grimes County, TX, Harris County, TX, Jackson County, TX, Madison County, TX, Matagorda County, TX, Montgomery County, TX, Robertson County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX

The radar

The Houston radar (KHGX), 104 km from the middle of the area, began a volume at 08:01 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, 8.0 hours before the alert went out and 246 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: 418 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1213 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 16, 10:50 PM CDT	Mesoscale Discussion	SPC	Anderson, Austin, Bastrop, Bell, Brazoria, Brazos and 47 more	85 min
Jun 16, 11:41 PM CDT	Tornado Watch	SPC	Austin, Brazoria, Brazos, Burleson, Colorado, Fayette and 15 more	7 hr
Jun 17, 5:31 AM CDT	Mesoscale Discussion	SPC	Anderson, Angelina, Austin, Bowie, Brazoria, Brazos and 49 more	89 min
Jun 17, 7:47 AM CDT	Mesoscale Discussion	SPC	Anderson, Angelina, Austin, Brazoria, Brazos, Burleson and 50 more	2 hr
Jun 17, 12:08 PM CDT	Mesoscale Discussion	SPC	Bowie, Cass, Marion	2 hr
Jun 17, 5:14 PM CDT	Mesoscale Discussion	SPC	Delta, Franklin, Hopkins, Hunt, Lamar, Rains and 4 more	2 hr

Nearby

Mesoscale Discussions in Texas, 2015 Every mesoscale discussion in 2015

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.