Alert archive / Arkansas / Mesoscale Discussions in 2014

Mesoscale Discussion 1325

July 8, 201419 counties in Arkansas; 11 counties in Mississippi; 5 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Jul 8, 2014, 10:01 PM CDT for 19 counties in Arkansas; 11 counties in Mississippi; 5 counties in Tennessee. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued: Jul 8, 2014, 10:01 PM CDT (03:01 UTC)
Expired: Jul 8, 2014, 11:00 PM CDT
In force: 59 min
Issued by: the Storm Prediction Center

All 35 counties

Arkansas County, AR, Crittenden County, AR, Cross County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Jefferson County, AR, Lee County, AR, Lonoke County, AR, Monroe County, AR, Montgomery County, AR, Phillips County, AR, Polk County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, St. Francis County, AR, Woodruff County, AR, Alcorn County, MS, Benton County, MS, DeSoto County, MS, Marshall County, MS, Panola County, MS, Prentiss County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Fayette County, TN, Hardeman County, TN, McNairy County, TN, Shelby County, TN, Tipton County, TN

The radar

The Little Rock radar (KLZK), 75 km from the middle of the area, began a volume at 03:02 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

Little Rock, AR (KBYH), launched 00:00Z, 3.0 hours before the alert went out and 136 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: 2055 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1168 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 109 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
Jul 9, 12:51 PM CDT	Mesoscale Discussion	SPC	Johnson	84 min

Nearby

Mesoscale Discussions in Arkansas, 2014 Mesoscale Discussions in Mississippi, 2014 Mesoscale Discussions in Tennessee, 2014 Every mesoscale discussion in 2014

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.