Alert archive / Missouri / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 779
The Storm Prediction Center issued this severe thunderstorm watch at Aug 24, 2004, 1:20 PM CDT for Benton County, Carroll County, Washington County, Arkansas; 15 counties in Illinois; 40 counties in Missouri. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 24, 2004, 1:20 PM CDT (18:20 UTC)
- Expired
- Aug 24, 2004, 7:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 58 counties
Benton County, AR, Carroll County, AR, Washington County, AR, Bond County, IL, Clinton County, IL, Fayette County, IL, Franklin County, IL, Jackson County, IL, Jefferson County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Perry County, IL, Randolph County, IL, Saint Clair County, IL, Union County, IL, Washington County, IL, Williamson County, IL, Barry County, MO, Barton County, MO, Bollinger County, MO, Cape Girardeau County, MO, Christian County, MO, City of Saint Louis, MO, Crawford County, MO, Dade County, MO, Dallas County, MO, Dent County, MO, Douglas County, MO, Franklin County, MO, Greene County, MO, Howell County, MO, Iron County, MO, Jasper County, MO, Jefferson County, MO, Laclede County, MO, Lawrence County, MO, Madison County, MO, Maries County, MO, McDonald County, MO, Newton County, MO, Ozark County, MO, Perry County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, Reynolds County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Shannon 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), 109 km from the middle of the area, began a volume at 18:23 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
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 1:44 PM CDT | Severe Thunderstorm Warning | LSX | City of Saint Louis | 46 min |
| Aug 24, 1:58 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 47 min |
| Aug 24, 2:35 PM CDT | Severe Thunderstorm Warning | LSX | Madison | 40 min |
| Aug 24, 2:44 PM CDT | Severe Thunderstorm Warning | LSX | Saint Clair | 61 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 6.3 hours before the alert went out and 156 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
- 1625 J/kg
- Mixed-layer CIN
- -124 J/kg
- Mixed-layer LCL
- 759 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 154 m²/s²
- 0-3 km storm-relative helicity
- 196 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 1:13 PM CDT | Mesoscale Discussion | SPC | Bond, Champaign, Christian, Clark, Clay, Clinton and 40 more | 2 hr |
| Aug 23, 10:18 PM CDT | Mesoscale Discussion | SPC | Bates, Benton, Camden, Cass, Cole, Cooper and 14 more | 117 min |
| Aug 24, 3:02 AM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Gentry, Harrison, Holt, Mercer and 2 more | 118 min |
| Aug 24, 12:08 PM CDT | Mesoscale Discussion | SPC | Barry, Barton, Benton, Camden, Cedar, Christian and 35 more | 2 hr |
| Aug 24, 5:26 PM CDT | Mesoscale Discussion | SPC | Andrew, Buchanan, Clay, Clinton, Holt, Platte | 3 hr |
Nearby
Severe Thunderstorm Watches in Missouri, 2004Severe Thunderstorm Watches in Illinois, 2004Severe Thunderstorm Watches in Arkansas, 2004Every severe thunderstorm watch in 2004
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.