Alert archive / Missouri / Severe Thunderstorm Watches in 2008
Severe Thunderstorm Watch 871
The Storm Prediction Center issued this severe thunderstorm watch at Aug 28, 2008, 3:22 PM CDT for 18 counties in Iowa; 17 counties in Kansas; 48 counties in Missouri. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 28, 2008, 3:22 PM CDT (20:22 UTC)
- Expired
- Aug 28, 2008, 10:42 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 83 counties
Appanoose County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Des Moines County, IA, Henry County, IA, Jefferson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Lucas County, IA, Monroe County, IA, Ringgold County, IA, Taylor County, IA, Van Buren County, IA, Wapello County, IA, Washington County, IA, Wayne County, IA, Anderson County, KS, Atchison County, KS, Brown County, KS, Coffey County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Linn County, KS, Miami County, KS, Nemaha County, KS, Osage County, KS, Shawnee County, KS, Wyandotte County, KS, Adair County, MO, Andrew County, MO, Atchison County, MO, Audrain County, MO, Bates County, MO, Boone County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Cass County, MO, Chariton County, MO, Clark County, MO, Clay County, MO, Clinton County, MO, Cooper County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Henry County, MO, Holt County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Knox County, MO, Lafayette County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Marion County, MO, Mercer County, MO, Moniteau County, MO, Monroe County, MO, Nodaway County, MO, Pettis County, MO, Platte County, MO, Putnam County, MO, Ralls County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO, Worth County, MO
The radar
The Pleasant Hill radar (KEAX), 117 km from the middle of the area, began a volume at 20:24 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
21 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 4:15 PM CDT | Severe Thunderstorm Warning | EAX | Daviess, DeKalb, Gentry, Grundy, Harrison, Mercer | 45 min |
| Aug 28, 4:46 PM CDT | Severe Thunderstorm Warning | EAX | Daviess, Grundy, Linn, Livingston, Sullivan | 38 min |
| Aug 28, 4:57 PM CDT | Severe Thunderstorm Warning | EAX | Doniphan | 48 min |
| Aug 28, 5:43 PM CDT | Severe Thunderstorm Warning | EAX | Adair, Chariton, Linn, Livingston, Macon, Sullivan | 47 min |
| Aug 28, 6:00 PM CDT | Severe Thunderstorm Warning | LSX | Knox | 45 min |
| Aug 28, 6:01 PM CDT | Severe Thunderstorm Warning | EAX | Jackson | 44 min |
| Aug 28, 6:08 PM CDT | Severe Thunderstorm Warning | EAX | Adair, Macon | 52 min |
| Aug 28, 6:21 PM CDT | Severe Thunderstorm Warning | EAX | Jackson, Johnson, Lafayette | 39 min |
| Aug 28, 6:21 PM CDT | Severe Thunderstorm Warning | LSX | Knox, Shelby | 24 min |
| Aug 28, 6:35 PM CDT | Severe Thunderstorm Warning | TOP | Douglas, Franklin | 40 min |
| Aug 28, 6:38 PM CDT | Severe Thunderstorm Warning | EAX | Johnson, Miami | 52 min |
| Aug 28, 6:40 PM CDT | Severe Thunderstorm Warning | LSX | Knox, Lewis, Marion, Monroe, Ralls, Shelby | 50 min |
| Aug 28, 7:00 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone, Callaway, Monroe | 45 min |
| Aug 28, 7:07 PM CDT | Severe Thunderstorm Warning | LSX | Lewis, Marion, Pike, Ralls | 53 min |
| Aug 28, 7:08 PM CDT | Flash Flood Warning | EAX | Howard, Randolph | 3 hr |
| Aug 28, 7:08 PM CDT | Severe Thunderstorm Warning | EAX | Johnson | 37 min |
| Aug 28, 7:21 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Callaway, Gasconade, Lincoln, Montgomery, Osage and 1 more | 39 min |
| Aug 28, 7:33 PM CDT | Severe Thunderstorm Warning | EAX | Cooper, Pettis | 42 min |
| Aug 28, 7:58 PM CDT | Severe Thunderstorm Warning | EAX | Cooper | 36 min |
| Aug 28, 7:58 PM CDT | Severe Thunderstorm Warning | EAX | Henry | 47 min |
| Aug 28, 8:00 PM CDT | Severe Thunderstorm Warning | TOP | Anderson, Coffey, Franklin | 45 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, 8.4 hours before the alert went out and 160 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
- 1477 J/kg
- Mixed-layer CIN
- -267 J/kg
- Mixed-layer LCL
- 1416 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 73 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 27, 10:16 PM CDT | Mesoscale Discussion | SPC | Allamakee, Audubon, Black Hawk, Boone, Bremer, Buena Vista and 44 more | 119 min |
| Aug 28, 2:48 PM CDT | Mesoscale Discussion | SPC | Appanoose, Davis, Des Moines, Henry, Jefferson, Lee and 7 more | 87 min |
| Aug 28, 6:11 PM CDT | Mesoscale Discussion | SPC | Anderson, Atchison, Brown, Coffey, Doniphan, Douglas and 11 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Missouri, 2008Severe Thunderstorm Watches in Iowa, 2008Severe Thunderstorm Watches in Kansas, 2008Every severe thunderstorm watch in 2008
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.