Alert archive / Missouri / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 877
The Storm Prediction Center issued this severe thunderstorm watch at Aug 20, 2003, 4:10 PM CDT for 18 counties in Kansas; 21 counties in Missouri. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 20, 2003, 4:10 PM CDT (21:10 UTC)
- Expired
- Aug 20, 2003, 9:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 39 counties
Atchison County, KS, Brown County, KS, Dickinson County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Miami County, KS, Morris County, KS, Osage County, KS, Pottawatomie County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Andrew County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Cass County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Platte County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Shelby County, MO
The radar
The Topeka radar (KTWX), 85 km from the middle of the area, began a volume at 21:09 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
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 4:48 PM CDT | Severe Thunderstorm Warning | TOP | Dickinson, Ottawa | 27 min |
| Aug 20, 5:31 PM CDT | Severe Thunderstorm Warning | TOP | Shawnee | 29 min |
| Aug 20, 5:59 PM CDT | Severe Thunderstorm Warning | TOP | Douglas, Shawnee | 31 min |
| Aug 20, 6:16 PM CDT | Severe Thunderstorm Warning | TOP | Dickinson | 44 min |
| Aug 20, 6:50 PM CDT | Severe Thunderstorm Warning | TOP | Shawnee | 40 min |
| Aug 20, 6:51 PM CDT | Severe Thunderstorm Warning | TOP | Pottawatomie | 39 min |
| Aug 20, 7:05 PM CDT | Severe Thunderstorm Warning | TOP | Dickinson | 25 min |
| Aug 20, 7:27 PM CDT | Severe Thunderstorm Warning | TOP | Shawnee | 33 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
Topeka, KS (KTOP), launched 12:00Z, 9.2 hours before the alert went out and 35 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
- 928 J/kg
- Mixed-layer CIN
- -181 J/kg
- Mixed-layer LCL
- 1785 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 154 m²/s²
- 0-3 km storm-relative helicity
- 121 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 |
|---|---|---|---|---|
| Aug 19, 7:15 PM CDT | Severe Thunderstorm Watch | SPC | Barton, Clark, Comanche, Decatur, Edwards, Ellis and 32 more | 5 hr |
| Aug 19, 10:09 PM CDT | Mesoscale Discussion | SPC | Barton, Clark, Comanche, Edwards, Ellis, Ford and 12 more | 96 min |
| Aug 20, 3:26 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Coffey, Crawford, Douglas and 14 more | 94 min |
| Aug 20, 2:15 PM CDT | Mesoscale Discussion | SPC | Adair, Clark, Knox, Lewis, Putnam, Schuyler and 1 more | 90 min |
| Aug 20, 2:50 PM CDT | Severe Thunderstorm Watch | SPC | Clark, Mercer, Putnam, Schuyler, Scotland | 5 hr |
| Aug 20, 5:27 PM CDT | Mesoscale Discussion | SPC | Audrain, Callaway, Carter, Cole, Crawford, Dent and 30 more | 2 hr |
| Aug 20, 6:09 PM CDT | Mesoscale Discussion | SPC | Clark, Mercer, Putnam, Schuyler, Scotland | 2 hr |
Nearby
Severe Thunderstorm Watches in Missouri, 2003Severe Thunderstorm Watches in Kansas, 2003Every severe thunderstorm watch 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.