Alert archive / Kentucky / Mesoscale Discussions in 2003

Mesoscale Discussion 2071

August 3, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Aug 3, 2003, 3:25 PM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Aug 3, 2003, 3:25 PM CDT (20:25 UTC)
Expired: Aug 3, 2003, 5:30 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 28 counties

Alexander County, IL, Hardin County, IL, Jackson County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Union County, IL, Williamson County, IL, Ballard County, KY, Calloway County, KY, Carlisle County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Bollinger County, MO, Cape Girardeau County, MO, Mississippi County, MO, New Madrid County, MO, Scott County, MO, Stoddard County, MO, Lake County, TN, Obion County, TN

The radar

The Paducah radar (KPAH), 46 km from the middle of the area, began a volume at 20:27 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, 8.4 hours before the alert went out and 266 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: 485 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 589 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

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
Aug 2, 9:11 PM CDT	Mesoscale Discussion	SPC	Bond, Clay, Clinton, Coles, Cumberland, Effingham and 9 more	94 min
Aug 3, 2:20 PM CDT	Severe Thunderstorm Watch	SPC	Alexander, Bond, Clay, Clinton, Crawford, Edwards and 28 more	6 hr
Aug 3, 6:15 PM CDT	Mesoscale Discussion	SPC	Bureau, Champaign, Ford, Grundy, Henry, Iroquois and 10 more	105 min
Aug 3, 5:38 PM CDT	Mesoscale Discussion	SPC	Barry, Carter, Christian, Douglas, Howell, Jasper and 8 more	2 hr

Nearby

Mesoscale Discussions in Kentucky, 2003 Mesoscale Discussions in Illinois, 2003 Mesoscale Discussions in Missouri, 2003 Every mesoscale discussion in 2003

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.