Alert archive / Missouri / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 238
The Storm Prediction Center issued this severe thunderstorm watch at May 6, 2002, 7:45 AM CDT for 7 counties in Illinois; 42 counties in Missouri. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- May 6, 2002, 7:45 AM CDT (12:45 UTC)
- Expired
- May 6, 2002, 12:00 PM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 49 counties
Adams County, IL, Calhoun County, IL, Greene County, IL, Jersey County, IL, Madison County, IL, Pike County, IL, Scott County, IL, Audrain County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, City of Saint Louis, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Dallas County, MO, Franklin County, MO, Gasconade County, MO, Henry County, MO, Hickory County, MO, Howard County, MO, Jefferson County, MO, Johnson County, MO, Laclede County, MO, Lincoln County, MO, Maries County, MO, Marion County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Phelps County, MO, Pike County, MO, Polk County, MO, Pulaski County, MO, Ralls County, MO, Randolph County, MO, Saint Charles County, MO, Saint Louis County, MO, Saline County, MO, Shelby County, MO, St. Clair County, MO, Warren County, MO, Webster County, MO, Wright County, MO
The radar
The St Louis radar (KLSX), 153 km from the middle of the area, began a volume at 12:49 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.
Warnings issued inside it
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 9:17 AM CDT | Flash Flood Warning | ILX | Morgan, Sangamon, Scott | 6 hr |
| May 6, 9:18 AM CDT | Severe Thunderstorm Warning | ILX | Scott | 42 min |
| May 6, 9:25 AM CDT | Flash Flood Warning | LSX | Adams, Pike | 4 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 0.8 hours before the alert went out and 229 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
- 219 J/kg
- Mixed-layer CIN
- -366 J/kg
- Mixed-layer LCL
- 1173 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 551 m²/s²
- 0-3 km storm-relative helicity
- 626 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 10:45 AM CDT | Severe Thunderstorm Watch | SPC | Bond, Clay, Clinton, Edwards, Effingham, Fayette and 20 more | 5 hr |
| May 6, 5:30 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Carroll, Jo Daviess, McHenry, Ogle, Stephenson and 1 more | 6 hr |
| May 5, 9:00 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Andrew, Bates, Benton, Buchanan, Caldwell and 27 more | 5 hr |
| May 6, 2:00 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Boone, Caldwell, Carroll, Cass, Chariton and 20 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Missouri, 2002Severe Thunderstorm Watches in Illinois, 2002Every severe thunderstorm watch in 2002
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.