Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 1918

August 7, 2004Curry County, Quay County, Roosevelt County, New Mexico; 6 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Aug 7, 2004, 7:45 PM MDT for Curry County, Quay County, Roosevelt County, New Mexico; 6 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Aug 7, 2004, 7:45 PM MDT (01:45 UTC)
Expired: Aug 7, 2004, 9:45 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Curry County, NM, Quay County, NM, Roosevelt County, NM, Bailey County, TX, Cochran County, TX, Deaf Smith County, TX, Lamb County, TX, Oldham County, TX, Parmer County, TX

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 1.8 hours before the alert went out and 146 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: 1978 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1575 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 55 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.8

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 8, 2:08 PM MDT	Mesoscale Discussion	SPC	Kimble, Lampasas, Llano, Mason, Sutton	97 min
Aug 8, 2:42 PM MDT	Mesoscale Discussion	SPC	Kimble, Lampasas, Llano, Mason, Sutton	93 min

Nearby

Mesoscale Discussions in Texas, 2004 Mesoscale Discussions in New Mexico, 2004 Every mesoscale discussion in 2004

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.