Alert archive / Texas / Mesoscale Discussions in 2008

Mesoscale Discussion 1502

June 20, 200811 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2008, 10:05 PM CDT for 11 counties in Texas. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued: Jun 20, 2008, 10:05 PM CDT (03:05 UTC)
Expired: Jun 20, 2008, 11:00 PM CDT
In force: 55 min
Issued by: the Storm Prediction Center

Counties Carson County, TX, Donley County, TX, Gray County, TX, Hartley County, TX, Hemphill County, TX, Hutchinson County, TX, Moore County, TX, Oldham County, TX, Potter County, TX, Roberts County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 64 km from the middle of the area, began a volume at 03:07 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 3.1 hours before the alert went out and 64 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: 25 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 2763 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 121 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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 20, 7:10 PM CDT	Severe Thunderstorm Watch	SPC	Armstrong, Carson, Collingsworth, Dallam, Deaf Smith, Donley and 14 more	4 hr
Jun 21, 1:34 PM CDT	Mesoscale Discussion	SPC	El Paso	86 min

Nearby

Mesoscale Discussions in Texas, 2008 Every mesoscale discussion in 2008

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.