Alert archive / Kentucky / Mesoscale Discussions in 2017

Mesoscale Discussion 1401

July 22, 20174 states

The Storm Prediction Center issued this mesoscale discussion at Jul 22, 2017, 7:11 PM CDT for 4 states. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Jul 22, 2017, 7:11 PM CDT (00:11 UTC)
Expired: Jul 22, 2017, 8:45 PM CDT
In force: 94 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 66 counties

Christian County, IL, Clark County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Fayette County, IL, Jasper County, IL, Macon County, IL, Macoupin County, IL, Montgomery County, IL, Moultrie County, IL, Sangamon County, IL, Shelby County, IL, Bartholomew County, IN, Brown County, IN, Clark County, IN, Clay County, IN, Daviess County, IN, Floyd County, IN, Greene County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Monroe County, IN, Ohio County, IN, Orange County, IN, Owen County, IN, Parke County, IN, Scott County, IN, Sullivan County, IN, Switzerland County, IN, Vermillion County, IN, Vigo County, IN, Washington County, IN, Bath County, KY, Boone County, KY, Bourbon County, KY, Bracken County, KY, Carroll County, KY, Fleming County, KY, Franklin County, KY, Gallatin County, KY, Grant County, KY, Harrison County, KY, Henry County, KY, Jefferson County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Montgomery County, KY, Nicholas County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Rowan County, KY, Scott County, KY, Shelby County, KY, Trimble County, KY, Adams County, OH

The radar

The Indianapolis radar (KIND), 84 km from the middle of the area, began a volume at 00:12 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 0.2 hours before the alert went out and 228 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: 1096 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1273 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Jul 22, 11:48 PM CDT	Mesoscale Discussion	SPC	Calhoun, Pike	87 min
Jul 23, 12:38 AM CDT	Severe Thunderstorm Watch	SPC	Adams, Bond, Brown, Calhoun, Cass, Clinton and 13 more	5 hr
Jul 23, 3:12 AM CDT	Mesoscale Discussion	SPC	Bond, Calhoun, Christian, Clay, Clinton, Edwards and 23 more	2 hr
Jul 23, 3:32 AM CDT	Severe Thunderstorm Watch	SPC	Christian, Clark, Clay, Coles, Crawford, Cumberland and 14 more	4 hr
Jul 23, 5:23 AM CDT	Mesoscale Discussion	SPC	Clay, Crawford, Edwards, Effingham, Hamilton, Jasper and 5 more	2 hr
Jul 23, 1:03 PM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Champaign, Cook, DeKalb, Douglas and 23 more	2 hr
Jul 23, 1:50 AM CDT	Mesoscale Discussion	SPC	Crawford, Daviess, Dubois, Floyd, Harrison, Orange and 5 more	3 hr

Nearby

Mesoscale Discussions in Kentucky, 2017 Mesoscale Discussions in Indiana, 2017 Mesoscale Discussions in Illinois, 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.