Alert archive / Texas / Mesoscale Discussions in 2013

Mesoscale Discussion 1579

July 31, 20135 states

The Storm Prediction Center issued this mesoscale discussion at Jul 31, 2013, 7:14 PM MDT for 5 states. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Jul 31, 2013, 7:14 PM MDT (01:14 UTC)
Expired: Jul 31, 2013, 8:45 PM MDT
In force: 91 min
Issued by: the Storm Prediction Center

All 27 counties

Baca County, CO, Bent County, CO, Prowers County, CO, Grant County, KS, Greeley County, KS, Hamilton County, KS, Morton County, KS, Seward County, KS, Stanton County, KS, Stevens County, KS, Quay County, NM, Beaver County, OK, Cimarron County, OK, Texas County, OK, Carson County, TX, Dallam County, TX, Deaf Smith County, TX, Hansford County, TX, Hartley County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Oldham County, TX, Potter County, TX, Roberts County, TX, Sherman County, TX

The radar

The Amarillo radar (KAMA), 107 km from the middle of the area, began a volume at 01:15 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 1.2 hours before the alert went out and 108 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: 155 J/kg
Mixed-layer CIN: -110 J/kg
Mixed-layer LCL: 2344 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 67 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
Aug 1, 11:53 AM MDT	Mesoscale Discussion	SPC	Sedgwick	2 hr
Aug 1, 4:06 PM MDT	Mesoscale Discussion	SPC	Cheyenne, Kit Carson, Lincoln, Logan, Morgan, Phillips and 2 more	54 min
Aug 1, 4:09 PM MDT	Severe Thunderstorm Watch	SPC	Cheyenne, Kit Carson, Lincoln, Logan, Morgan, Phillips and 4 more	5 hr

Nearby

Mesoscale Discussions in Texas, 2013 Mesoscale Discussions in Kansas, 2013 Mesoscale Discussions in Colorado, 2013 Every mesoscale discussion in 2013

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.