Alert archive / Arkansas / Mesoscale Discussions in 2016

Mesoscale Discussion 260

March 23, 201612 counties in Arkansas; Barry County, Stone County, Missouri; LeFlore County, McCurtain County, Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Mar 23, 2016, 11:01 PM CDT for 12 counties in Arkansas; Barry County, Stone County, Missouri; LeFlore County, McCurtain County, Oklahoma. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued: Mar 23, 2016, 11:01 PM CDT (04:01 UTC)
Expired: Mar 24, 2016, 12:00 AM CDT
In force: 59 min
Issued by: the Storm Prediction Center

Counties Carroll County, AR, Crawford County, AR, Franklin County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Newton County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Washington County, AR, Yell County, AR, Barry County, MO, Stone County, MO, LeFlore County, OK, McCurtain County, OK

The radar

The Western Arkansas radar (KSRX), 45 km from the middle of the area, began a volume at 04:04 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 00:00Z, 4.0 hours before the alert went out and 145 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: 243 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 1307 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 210 m²/s²
0-3 km storm-relative helicity: 164 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 23, 8:49 PM CDT	Mesoscale Discussion	SPC	Benton, Carroll, Crawford, Madison, Sebastian, Washington	56 min
Mar 23, 7:45 PM CDT	Mesoscale Discussion	SPC	Caldwell, Daviess, Grundy, Harrison, Linn, Livingston and 3 more	2 hr

Nearby

Mesoscale Discussions in Arkansas, 2016 Mesoscale Discussions in Missouri, 2016 Mesoscale Discussions in Oklahoma, 2016 Every mesoscale discussion in 2016

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.