Alert archive / Arkansas / Mesoscale Discussions in 2005

Mesoscale Discussion 997

May 24, 200521 counties in Arkansas; 12 parishes in Louisiana

The Storm Prediction Center issued this mesoscale discussion at May 24, 2005, 8:44 PM CDT for 21 counties in Arkansas; 12 parishes in Louisiana. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 24, 2005, 8:44 PM CDT (01:44 UTC)
Expired: May 24, 2005, 10:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 33 counties

Ashley County, AR, Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleveland County, AR, Columbia County, AR, Dallas County, AR, Garland County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Lafayette County, AR, Montgomery County, AR, Nevada County, AR, Ouachita County, AR, Pike County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Union County, AR, Caldwell Parish, LA, Claiborne Parish, LA, Franklin Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Richland Parish, LA, Tensas Parish, LA, Union Parish, LA, West Carroll Parish, LA

The radar

The Shreveport radar (KSHV), 136 km from the middle of the area, began a volume at 01:45 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

Shreveport, LA (KSHV), launched 00:00Z, 1.7 hours before the alert went out and 128 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: 1380 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 1629 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: 100 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
May 24, 7:17 PM CDT	Mesoscale Discussion	SPC	Bradley, Calhoun, Clark, Columbia, Dallas, Garland and 20 more	118 min

Nearby

Mesoscale Discussions in Arkansas, 2005 Mesoscale Discussions in Louisiana, 2005 Every mesoscale discussion in 2005

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.