Alert archive / Arkansas / Mesoscale Discussions in 2014

Mesoscale Discussion 161

March 2, 201415 counties in Arkansas; Dunklin County, Pemiscot County, Missouri; Dyer County, Lake County, Lauderdale County, Tennessee

The Storm Prediction Center issued this mesoscale discussion at Mar 2, 2014, 1:44 PM CST for 15 counties in Arkansas; Dunklin County, Pemiscot County, Missouri; Dyer County, Lake County, Lauderdale County, Tennessee. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Mar 2, 2014, 1:44 PM CST (19:44 UTC)
Expired: Mar 2, 2014, 6:15 PM CST
In force: 5 hr
Issued by: the Storm Prediction Center

Counties Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Faulkner County, AR, Greene County, AR, Independence County, AR, Jackson County, AR, Lawrence County, AR, Mississippi County, AR, Poinsett County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Dunklin County, MO, Pemiscot County, MO, Dyer County, TN, Lake County, TN, Lauderdale County, TN

The radar

The Memphis radar (KNQA), 127 km from the middle of the area, began a volume at 19:45 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

Springfield, MO (KSGF), launched 12:00Z, 7.7 hours before the alert went out and 269 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: 12 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 407 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 258 m²/s²
0-3 km storm-relative helicity: 421 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
Mar 2, 7:27 AM CST	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Crawford, Franklin and 13 more	6 hr
Mar 2, 3:36 PM CST	Mesoscale Discussion	SPC	Howard, Little River, Montgomery, Pike, Sevier	4 hr
Mar 1, 8:55 PM CST	Mesoscale Discussion	SPC	Andrew, Buchanan, Caldwell, Carroll, Clay, Clinton and 10 more	6 hr
Mar 2, 5:32 AM CST	Mesoscale Discussion	SPC	Bollinger, Camden, Cape Girardeau, Crawford, Dallas, Dent and 26 more	6 hr
Mar 2, 5:48 PM CST	Mesoscale Discussion	SPC	Henry, Houston, Macon, Montgomery, Robertson, Stewart and 2 more	6 hr

Nearby

Mesoscale Discussions in Arkansas, 2014 Mesoscale Discussions in Tennessee, 2014 Mesoscale Discussions in Missouri, 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.