Alert archive / Missouri / Mesoscale Discussions in 2003
Mesoscale Discussion 609
The Storm Prediction Center issued this mesoscale discussion at Apr 28, 2003, 3:56 PM CDT for 8 counties in Illinois; 40 counties in Missouri. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 28, 2003, 3:56 PM CDT (20:56 UTC)
- Expired
- Apr 28, 2003, 6:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 48 counties
Alexander County, IL, Jackson County, IL, Monroe County, IL, Perry County, IL, Randolph County, IL, Saint Clair County, IL, Union County, IL, Washington County, IL, Bollinger County, MO, Butler County, MO, Camden County, MO, Cape Girardeau County, MO, Carter County, MO, Christian County, MO, Crawford County, MO, Dallas County, MO, Dent County, MO, Douglas County, MO, Franklin County, MO, Greene County, MO, Hickory County, MO, Howell County, MO, Iron County, MO, Jefferson County, MO, Laclede County, MO, Madison County, MO, Maries County, MO, Miller County, MO, Oregon County, MO, Ozark County, MO, Perry County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Washington County, MO, Wayne County, MO, Webster County, MO, Wright County, MO
The radar
The Springfield radar (KSGF), 150 km from the middle of the area, began a volume at 20:58 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 12:00Z, 8.9 hours before the alert went out and 194 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
- 91 J/kg
- Mixed-layer CIN
- -341 J/kg
- Mixed-layer LCL
- 1785 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 208 m²/s²
- 0-3 km storm-relative helicity
- 217 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, 1:13 PM CDT | Mesoscale Discussion | SPC | Clay, Crawford, Edwards, Effingham, Fayette, Franklin and 18 more | 2 hr |
| Apr 28, 2:35 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Clinton, Jackson, Monroe, Perry, Randolph and 3 more | 5 hr |
| Apr 28, 2:12 AM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Buchanan, Caldwell, Clinton, Daviess and 7 more | 93 min |
| Apr 28, 12:09 PM CDT | Mesoscale Discussion | SPC | Barry, Barton, Bates, Benton, Camden, Cedar and 23 more | 2 hr |
| Apr 28, 5:10 PM CDT | Mesoscale Discussion | SPC | Barton, Bates, Cass, Jackson, Jasper, McDonald and 2 more | 65 min |
| Apr 28, 5:30 PM CDT | Severe Thunderstorm Watch | SPC | Barry, Barton, Bates, Cedar, Dade, Jasper and 5 more | 3 hr |
Nearby
Mesoscale Discussions in Missouri, 2003Mesoscale Discussions in Illinois, 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; radar from the NEXRAD Level II archive.