Alert archive / Kentucky / Mesoscale Discussions in 2019

Mesoscale Discussion 90

February 7, 20195 states

The Storm Prediction Center issued this mesoscale discussion at Feb 7, 2019, 9:26 AM CST for 5 states. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Feb 7, 2019, 9:26 AM CST (15:26 UTC)
Expired: Feb 7, 2019, 11:00 AM CST
In force: 94 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 43 counties

Alexander County, IL, Edwards County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Wabash County, IL, White County, IL, Williamson County, IL, Dubois County, IN, Gibson County, IN, Pike County, IN, Posey County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Ballard County, KY, Caldwell County, KY, Carlisle County, KY, Crittenden County, KY, Daviess County, KY, Fulton County, KY, Graves County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Union County, KY, Webster County, KY, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Dyer County, TN, Lake County, TN, Obion County, TN, Weakley County, TN

The radar

The Paducah radar (KPAH), 24 km from the middle of the area, began a volume at 15:26 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

Nashville Metro, TN (KBNA), launched 12:00Z, 3.4 hours before the alert went out and 219 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: 206 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 689 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 352 m²/s²
0-3 km storm-relative helicity: 351 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.6

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
Feb 7, 6:26 AM CST	Mesoscale Discussion	SPC	Carroll, Henry, Jo Daviess, Mercer, Ogle, Rock Island and 3 more	4 hr
Feb 7, 7:11 AM CST	Mesoscale Discussion	SPC	Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 9 more	64 min
Feb 6, 7:51 PM CST	Mesoscale Discussion	SPC	Bates, Buchanan, Cass, Clay, Clinton, Henry and 8 more	6 hr
Feb 6, 9:06 PM CST	Mesoscale Discussion	SPC	Barry, Barton, Cedar, Dade, Greene, Jasper and 6 more	114 min
Feb 6, 9:33 PM CST	Mesoscale Discussion	SPC	Adair, Andrew, Atchison, Boone, Carroll, Chariton and 26 more	6 hr
Feb 6, 11:33 PM CST	Mesoscale Discussion	SPC	Barry, Christian, Douglas, Greene, Howell, Lawrence and 5 more	87 min
Feb 7, 12:50 AM CST	Mesoscale Discussion	SPC	Carter, Dent, Douglas, Howell, Reynolds, Shannon and 1 more	55 min
Feb 7, 2:21 AM CST	Severe Thunderstorm Watch	SPC	Howell, Oregon, Ozark, Shannon	6 hr
Feb 7, 5:23 AM CST	Mesoscale Discussion	SPC	Bollinger, Butler, Carter, Oregon, Ripley, Stoddard and 1 more	67 min

Nearby

Mesoscale Discussions in Kentucky, 2019 Mesoscale Discussions in Illinois, 2019 Mesoscale Discussions in Indiana, 2019 Every mesoscale discussion in 2019

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.