Alert archive / Missouri / Severe Thunderstorm Watches in 2005
Severe Thunderstorm Watch 176
The Storm Prediction Center issued this severe thunderstorm watch at Apr 21, 2005, 1:10 PM CDT for 19 counties in Illinois; 22 counties in Missouri. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 21, 2005, 1:10 PM CDT (18:10 UTC)
- Expired
- Apr 21, 2005, 7:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 41 counties
Adams County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Clinton County, IL, Greene County, IL, Jackson County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Monroe County, IL, Morgan County, IL, Perry County, IL, Pike County, IL, Randolph County, IL, Saint Clair County, IL, Schuyler County, IL, Scott County, IL, Washington County, IL, Adair County, MO, Audrain County, MO, City of Saint Louis, MO, Crawford County, MO, Franklin County, MO, Gasconade County, MO, Jefferson County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Marion County, MO, Monroe County, MO, Montgomery County, MO, Pike County, MO, Ralls County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Shelby County, MO, Warren County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 60 km from the middle of the area, began a volume at 18:10 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
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 4:48 PM CDT | Severe Thunderstorm Warning | LSX | Gasconade | 42 min |
| Apr 21, 5:15 PM CDT | Severe Thunderstorm Warning | LSX | Franklin | 45 min |
| Apr 21, 5:17 PM CDT | Severe Thunderstorm Warning | LSX | Crawford | 58 min |
| Apr 21, 5:30 PM CDT | Severe Thunderstorm Warning | LSX | Gasconade | 30 min |
| Apr 21, 5:55 PM CDT | Severe Thunderstorm Warning | LSX | Washington | 50 min |
| Apr 21, 5:59 PM CDT | Severe Thunderstorm Warning | LSX | Franklin | 50 min |
| Apr 21, 6:18 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson | 42 min |
| Apr 21, 6:39 PM CDT | Flash Flood Warning | LSX | Washington | 5 hr |
| Apr 21, 6:41 PM CDT | Severe Thunderstorm Warning | LSX | Washington | 50 min |
| Apr 21, 6:55 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Saint Louis, City of Saint Louis | 54 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
Lincoln, IL (KILX), launched 12:00Z, 6.2 hours before the alert went out and 207 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
- 600 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 138 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 |
|---|---|---|---|---|
| Apr 20, 7:03 PM CDT | Mesoscale Discussion | SPC | Brown, Cass, Fulton, Hancock, Henderson, Henry and 12 more | 87 min |
| Apr 21, 3:28 PM CDT | Mesoscale Discussion | SPC | Adams, Monroe, Pike | 92 min |
| Apr 21, 5:22 PM CDT | Mesoscale Discussion | SPC | Alexander, Gallatin, Hardin, Johnson, Massac, Pope and 4 more | 53 min |
| Apr 21, 5:35 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Gallatin, Hardin, Jackson, Johnson, Massac and 5 more | 7 hr |
| Apr 21, 5:52 PM CDT | Mesoscale Discussion | SPC | Calhoun, Jersey, Madison, Monroe, Saint Clair | 53 min |
| Apr 21, 6:45 PM CDT | Severe Thunderstorm Watch | SPC | Bond, Calhoun, Clinton, Franklin, Greene, Hamilton and 10 more | 6 hr |
| Apr 21, 3:34 AM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Buchanan, Daviess, DeKalb, Gentry and 4 more | 116 min |
| Apr 21, 11:13 AM CDT | Mesoscale Discussion | SPC | Platte | 2 hr |
| Apr 21, 12:15 PM CDT | Mesoscale Discussion | SPC | Boone, Callaway, Cole, Cooper, Crawford, Franklin and 12 more | 2 hr |
| Apr 21, 1:23 PM CDT | Mesoscale Discussion | SPC | Barry, Barton, Bates, Benton, Camden, Cedar and 22 more | 67 min |
| Apr 21, 1:45 PM CDT | Severe Thunderstorm Watch | SPC | Barry, Barton, Bates, Benton, Camden, Cedar and 32 more | 5 hr |
| Apr 21, 3:05 PM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Buchanan, Caldwell, Carroll, Cass and 11 more | 85 min |
| Apr 21, 3:35 PM CDT | Tornado Watch | SPC | Andrew, Atchison, Bates, Benton, Buchanan, Caldwell and 19 more | 7 hr |
| Apr 21, 4:51 PM CDT | Mesoscale Discussion | SPC | Buchanan, Clay, Clinton, Platte | 54 min |
| Apr 21, 5:14 PM CDT | Mesoscale Discussion | SPC | McDonald | 2 hr |
| Apr 21, 6:10 PM CDT | Tornado Watch | SPC | Barry, Barton, Camden, Cedar, Christian, Crawford and 27 more | 7 hr |
| Apr 21, 6:51 PM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Buchanan, Caldwell, Cass, Clay and 12 more | 84 min |
Nearby
Severe Thunderstorm Watches in Missouri, 2005Severe Thunderstorm Watches in Illinois, 2005Every severe thunderstorm watch in 2005
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.