Alert archive / Missouri / Tornado Watches in 2010
Tornado Watch 87
The Storm Prediction Center issued this tornado watch at Apr 23, 2010, 10:58 PM CDT for 4 states. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 23, 2010, 10:58 PM CDT (03:58 UTC)
- Expired
- Apr 24, 2010, 4:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 59 counties
Adair County, IA, Adams County, IA, Audubon County, IA, Carroll County, IA, Cass County, IA, Crawford County, IA, Decatur County, IA, Fremont County, IA, Guthrie County, IA, Harrison County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Ringgold County, IA, Shelby County, IA, Taylor County, IA, Union County, IA, Atchison County, KS, Doniphan County, KS, Johnson County, KS, Leavenworth County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Jackson County, MO, Lafayette County, MO, Livingston County, MO, Mercer County, MO, Nodaway County, MO, Platte County, MO, Ray County, MO, Worth County, MO, Burt County, NE, Cass County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Douglas County, NE, Nemaha County, NE, Otoe County, NE, Sarpy County, NE, Saunders County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE
The radar
The Omaha radar (KOAX), 88 km from the middle of the area, began a volume at 04:00 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
- 30%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 11:35 PM CDT | Severe Thunderstorm Warning | DMX | Adams, Taylor | 40 min |
| Apr 23, 11:43 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona | 14 min |
| Apr 24, 1:04 AM CDT | Severe Thunderstorm Warning | EAX | Buchanan, Clinton, Platte | 26 min |
| Apr 24, 1:14 AM CDT | Severe Thunderstorm Warning | EAX | Andrew, Buchanan, DeKalb | 15 min |
| Apr 24, 1:28 AM CDT | Severe Thunderstorm Warning | EAX | Clay, Clinton, Platte | 32 min |
| Apr 24, 1:39 AM CDT | Severe Thunderstorm Warning | EAX | Leavenworth, Wyandotte | 22 min |
| Apr 24, 1:47 AM CDT | Severe Thunderstorm Warning | EAX | DeKalb | 28 min |
| Apr 24, 1:59 AM CDT | Severe Thunderstorm Warning | EAX | Clinton | 17 min |
| Apr 24, 2:12 AM CDT | Severe Thunderstorm Warning | EAX | DeKalb | 20 min |
| Apr 24, 2:25 AM CDT | Severe Thunderstorm Warning | EAX | Gentry, Harrison | 35 min |
| Apr 24, 2:52 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Clarke, Madison, Union | 38 min |
| Apr 24, 3:01 AM CDT | Severe Thunderstorm Warning | EAX | Harrison, Mercer | 44 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
Omaha, NE (KOAX), launched 00:00Z, 4.0 hours before the alert went out and 88 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
- 1792 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 927 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.9
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 7:02 PM CDT | Mesoscale Discussion | SPC | Fremont, Harrison, Mills, Monona, Pottawattamie | 88 min |
| Apr 23, 7:28 PM CDT | Tornado Watch | SPC | Fremont, Harrison, Mills, Monona, Montgomery, Page and 3 more | 5 hr |
| Apr 23, 9:22 PM CDT | Mesoscale Discussion | SPC | Fremont, Harrison, Mills, Monona, Pottawattamie | 53 min |
| Apr 24, 3:15 AM CDT | Mesoscale Discussion | SPC | Decatur, Union | 30 min |
| Apr 24, 1:29 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Buena Vista, Calhoun, Carroll and 30 more | 91 min |
| Apr 23, 10:03 PM CDT | Mesoscale Discussion | SPC | Anderson, Atchison, Brown, Doniphan, Douglas, Franklin and 12 more | 27 min |
| Apr 23, 7:06 PM CDT | Tornado Watch | SPC | Adair, Audrain, Boone, Callaway, Chariton, Howard and 17 more | 5 hr |
| Apr 23, 11:40 PM CDT | Mesoscale Discussion | SPC | Dunklin, Pemiscot | 65 min |
| Apr 24, 2:44 AM CDT | Mesoscale Discussion | SPC | Dunklin, Pemiscot | 91 min |
| Apr 24, 6:00 AM CDT | Tornado Watch | SPC | Dunklin, Pemiscot | 6 hr |
| Apr 24, 7:35 AM CDT | Mesoscale Discussion | SPC | Bollinger, Cape Girardeau, Mississippi, Perry, Scott, Stoddard | 55 min |
| Apr 24, 9:31 AM CDT | Mesoscale Discussion | SPC | Dunklin, Pemiscot | 59 min |
| Apr 24, 11:08 AM CDT | Mesoscale Discussion | SPC | Bollinger, Butler, Cape Girardeau, Carter, Crawford, Dent and 26 more | 67 min |
| Apr 24, 11:31 AM CDT | Tornado Watch | SPC | Bollinger, Butler, Cape Girardeau, Carter, Crawford, Dent and 20 more | 8 hr |
| Apr 24, 1:52 PM CDT | Mesoscale Discussion | SPC | Camden, Christian, Crawford, Dallas, Dent, Douglas and 14 more | 53 min |
| Apr 24, 2:01 PM CDT | Mesoscale Discussion | SPC | Butler, Dunklin, Mississippi, New Madrid, Pemiscot, Scott and 1 more | 89 min |
| Apr 24, 2:52 PM CDT | Mesoscale Discussion | SPC | Crawford, Franklin, Gasconade, Iron, Jefferson, Saint Charles and 6 more | 53 min |
| Apr 24, 3:20 PM CDT | Tornado Watch | SPC | Franklin, Gasconade, Jefferson, Lewis, Lincoln, Marion and 7 more | 7 hr |
| Apr 24, 5:14 PM CDT | Mesoscale Discussion | SPC | Franklin, Gasconade, Jefferson, Lincoln, Montgomery, Pike and 5 more | 61 min |
| Apr 24, 5:48 PM CDT | Mesoscale Discussion | SPC | Bollinger, Cape Girardeau, Crawford, Dent, Iron, Madison and 9 more | 57 min |
Nearby
Tornado Watches in Missouri, 2010Tornado Watches in Iowa, 2010Tornado Watches in Nebraska, 2010Every tornado watch in 2010
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.