Alert archive / Arkansas / Mesoscale Discussions in 2005

Mesoscale Discussion 2479

November 27, 200520 counties in Arkansas

The Storm Prediction Center issued this mesoscale discussion at Nov 27, 2005, 5:07 PM CST for 20 counties in Arkansas. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Nov 27, 2005, 5:07 PM CST (23:07 UTC)
Expired: Nov 27, 2005, 7:00 PM CST
In force: 113 min
Issued by: the Storm Prediction Center

Counties Clark County, AR, Conway County, AR, Faulkner County, AR, Garland County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Little River County, AR, Montgomery County, AR, Nevada County, AR, Perry County, AR, Pike County, AR, Pope County, AR, Pulaski County, AR, Saline County, AR, Searcy County, AR, Sevier County, AR, Stone County, AR, Van Buren County, AR, Yell County, AR

The radar

The Little Rock radar (KLZK), 109 km from the middle of the area, began a volume at 23:07 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 879Nov 27, 6:20 PM CST

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 11.1 hours before the alert went out and 223 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 720 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 212 m²/s²
0-3 km storm-relative helicity: 195 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
Nov 27, 1:48 PM CST	Mesoscale Discussion	SPC	Crawford, Franklin, Hempstead, Howard, Little River, Logan and 9 more	117 min
Nov 27, 2:20 PM CST	Tornado Watch	SPC	Baxter, Benton, Boone, Calhoun, Carroll, Clark and 40 more	8 hr
Nov 27, 4:39 PM CST	Mesoscale Discussion	SPC	Arkansas, Bradley, Clay, Cleburne, Cleveland, Craighead and 24 more	96 min

Nearby

Mesoscale Discussions in Arkansas, 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.