Alert archive / Arkansas / Mesoscale Discussions in 2005

Mesoscale Discussion 2212

September 15, 200513 counties in Arkansas; 4 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Sep 15, 2005, 5:29 PM CDT for 13 counties in Arkansas; 4 counties in Texas. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Sep 15, 2005, 5:29 PM CDT (22:29 UTC)
Expired: Sep 15, 2005, 6:30 PM CDT
In force: 61 min
Issued by: the Storm Prediction Center

Counties Arkansas County, AR, Bradley County, AR, Calhoun County, AR, Columbia County, AR, Drew County, AR, Hempstead County, AR, Lafayette County, AR, Lincoln County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Ouachita County, AR, Union County, AR, Bowie County, TX, Cass County, TX, Morris County, TX, Titus County, TX

The radar

The Shreveport radar (KSHV), 144 km from the middle of the area, began a volume at 22:33 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 12:00Z, 10.5 hours before the alert went out and 137 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: 715 J/kg
Mixed-layer CIN: -110 J/kg
Mixed-layer LCL: 907 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: -25 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.2

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
Sep 15, 6:48 AM CDT	Mesoscale Discussion	SPC	Montgomery, Polk, Scott, Sebastian, Sevier	27 min
Sep 15, 1:43 PM CDT	Mesoscale Discussion	SPC	Ashley, Bradley, Calhoun, Clark, Cleveland, Columbia and 17 more	92 min
Sep 15, 2:05 PM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Bradley, Calhoun, Clark, Cleveland, Columbia and 17 more	5 hr
Sep 14, 9:11 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Cottle, Crosby, Dickens, Floyd and 11 more	64 min
Sep 15, 2:35 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Cooke, Delta, Fannin and 8 more	25 min
Sep 15, 3:00 AM CDT	Severe Thunderstorm Watch	SPC	Wichita, Wilbarger	7 hr

Nearby

Mesoscale Discussions in Arkansas, 2005 Mesoscale Discussions in Texas, 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.