Alert archive / Illinois / Mesoscale Discussions in 2003
Mesoscale Discussion 605
The Storm Prediction Center issued this mesoscale discussion at Apr 28, 2003, 1:13 PM CDT for 24 counties in Illinois; 16 counties in Indiana; 14 counties in Kentucky. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 28, 2003, 1:13 PM CDT (18:13 UTC)
- Expired
- Apr 28, 2003, 3:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 54 counties
Clay County, IL, Crawford County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Johnson County, IL, Lawrence County, IL, Marion County, IL, Perry County, IL, Pope County, IL, Richland County, IL, Saline County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Crawford County, IN, Daviess County, IN, Dubois County, IN, Gibson County, IN, Harrison County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Orange County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Washington County, IN, Breckinridge County, KY, Butler County, KY, Crittenden County, KY, Daviess County, KY, Grayson County, KY, Hancock County, KY, Henderson County, KY, Hopkins County, KY, McLean County, KY, Meade County, KY, Muhlenberg County, KY, Ohio County, KY, Union County, KY, Webster County, KY
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 6.2 hours before the alert went out and 259 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1390 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 147 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 2:35 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Clinton, Jackson, Monroe, Perry, Randolph and 3 more | 5 hr |
| Apr 28, 3:56 PM CDT | Mesoscale Discussion | SPC | Alexander, Jackson, Monroe, Perry, Randolph, Saint Clair and 2 more | 2 hr |
Nearby
Mesoscale Discussions in Illinois, 2003Mesoscale Discussions in Indiana, 2003Mesoscale Discussions in Kentucky, 2003Every 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.