Alert archive / Arkansas / Mesoscale Discussions in 2017

Mesoscale Discussion 1195

June 30, 20179 counties in Arkansas; 9 counties in Missouri; 8 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jun 30, 2017, 6:30 AM CDT for 9 counties in Arkansas; 9 counties in Missouri; 8 counties in Oklahoma. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 30, 2017, 6:30 AM CDT (11:30 UTC)
Expired: Jun 30, 2017, 8:30 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 26 counties

Benton County, AR, Boone County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Johnson County, AR, Madison County, AR, Newton County, AR, Washington County, AR, Christian County, MO, Douglas County, MO, Laclede County, MO, Ozark County, MO, Pulaski County, MO, Taney County, MO, Texas County, MO, Webster County, MO, Wright County, MO, Adair County, OK, Cherokee County, OK, Creek County, OK, Muskogee County, OK, Okmulgee County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Springfield radar (KSGF), 120 km from the middle of the area, began a volume at 11:32 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, 11.5 hours before the alert went out and 68 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: 973 J/kg
Mixed-layer CIN: -114 J/kg
Mixed-layer LCL: 1229 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 224 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.6

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
Jun 30, 2:42 AM CDT	Severe Thunderstorm Watch	SPC	Benton, Boone, Carroll, Crawford, Franklin, Johnson and 3 more	6 hr
Jun 30, 3:42 PM CDT	Severe Thunderstorm Watch	SPC	Crawford, Franklin, Sebastian	7 hr
Jun 30, 6:27 PM CDT	Mesoscale Discussion	SPC	Crawford, Franklin, Sebastian, Washington	93 min
Jun 30, 1:35 AM CDT	Mesoscale Discussion	SPC	Andrew, Buchanan, Clinton, DeKalb, Holt, Platte	2 hr
Jun 29, 8:37 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Grant, Harper, Woods	83 min
Jun 29, 10:56 PM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Garfield, Grant, Harper, Kay, Major and 7 more	6 hr
Jun 30, 1:32 AM CDT	Mesoscale Discussion	SPC	Alfalfa, Garfield, Grant, Kay, Major, Noble and 5 more	118 min
Jun 30, 4:37 AM CDT	Mesoscale Discussion	SPC	Alfalfa, Garfield, Grant, Kay, Major, Noble and 7 more	113 min
Jun 30, 3:21 PM CDT	Mesoscale Discussion	SPC	Atoka, Beckham, Bryan, Caddo, Canadian, Carter and 39 more	114 min

Nearby

Mesoscale Discussions in Arkansas, 2017 Mesoscale Discussions in Missouri, 2017 Mesoscale Discussions in Oklahoma, 2017 Every mesoscale discussion in 2017

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.