Alert archive / Nebraska / Tornado Watches in 2009
Tornado Watch 440
The Storm Prediction Center issued this tornado watch at Jun 17, 2009, 12:52 PM CDT for 4 states. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 17, 2009, 12:52 PM CDT (17:52 UTC)
- Expired
- Jun 17, 2009, 9:00 PM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 4 in
- Strongest gust expected
- 70 kt
All 68 counties
Adair County, IA, Adams County, IA, Cass County, IA, Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Atchison County, KS, Brown County, KS, Doniphan County, KS, Jewell County, KS, Marshall County, KS, Nemaha County, KS, Phillips County, KS, Republic County, KS, Smith County, KS, Washington County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, DeKalb County, MO, Gentry County, MO, Holt County, MO, Nodaway County, MO, Worth County, MO, Adams County, NE, Buffalo County, NE, Butler County, NE, Cass County, NE, Clay County, NE, Dawson County, NE, Douglas County, NE, Fillmore County, NE, Franklin County, NE, Furnas County, NE, Gage County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Lancaster County, NE, Merrick County, NE, Nance County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Phelps County, NE, Polk County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Thayer County, NE, Valley County, NE, Webster County, NE, York County, NE
The radar
The Omaha radar (KOAX), 56 km from the middle of the area, began a volume at 17:53 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
- 50%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 70%
- One or more gusts of 65 knots or more
- 50%
- Ten or more severe hail reports
- 90%
- One or more hailstones of 2 inches or more
- 80%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
44 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 1:08 PM CDT | Severe Thunderstorm Warning | TOP | Marshall | 52 min |
| Jun 17, 1:15 PM CDT | Severe Thunderstorm Warning | TOP | Republic, Washington | 45 min |
| Jun 17, 1:30 PM CDT | Severe Thunderstorm Warning | TOP | Nemaha | 45 min |
| Jun 17, 1:39 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Jefferson | 66 min |
| Jun 17, 2:11 PM CDT | Severe Thunderstorm Warning | TOP | Brown, Nemaha | 49 min |
| Jun 17, 2:11 PM CDT | Tornado Warning | TOP | Marshall, Washington | 34 min |
| Jun 17, 2:12 PM CDT | Tornado Warning | OAX | Gage, Pawnee | 48 min |
| Jun 17, 2:22 PM CDT | Tornado Warning | TOP | Brown, Jackson, Nemaha | 38 min |
| Jun 17, 2:39 PM CDT | Tornado Warning | TOP | Marshall, Nemaha | 36 min |
| Jun 17, 2:42 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Pawnee, Richardson | 63 min |
| Jun 17, 2:52 PM CDT | Severe Thunderstorm Warning | EAX | Atchison, Doniphan | 38 min |
| Jun 17, 2:57 PM CDT | Tornado Warning | TOP | Brown, Jackson | 33 min |
| Jun 17, 3:07 PM CDT | Tornado Warning | EAX | Atchison | 28 min |
| Jun 17, 3:15 PM CDT | Tornado Warning | TOP | Marshall, Nemaha | 30 min |
| Jun 17, 3:30 PM CDT | Tornado Warning | EAX | Atchison, Doniphan | 30 min |
| Jun 17, 3:51 PM CDT | Severe Thunderstorm Warning | EAX | Doniphan | 39 min |
| Jun 17, 3:55 PM CDT | Severe Thunderstorm Warning | OAX | Richardson | 50 min |
| Jun 17, 3:58 PM CDT | Severe Thunderstorm Warning | EAX | Atchison, Doniphan | 32 min |
| Jun 17, 4:26 PM CDT | Severe Thunderstorm Warning | EAX | Doniphan | 49 min |
| Jun 17, 4:28 PM CDT | Severe Thunderstorm Warning | EAX | Doniphan | 47 min |
| Jun 17, 4:46 PM CDT | Severe Thunderstorm Warning | EAX | Caldwell, Clinton, Daviess, DeKalb | 29 min |
| Jun 17, 5:15 PM CDT | Severe Thunderstorm Warning | EAX | Buchanan, Caldwell, Clinton, DeKalb | 30 min |
| Jun 17, 5:42 PM CDT | Severe Thunderstorm Warning | GID | Buffalo, Sherman | 48 min |
| Jun 17, 5:45 PM CDT | Severe Thunderstorm Warning | EAX | Caldwell, Carroll, Clay, Clinton, DeKalb, Livingston and 1 more | 30 min |
| Jun 17, 5:59 PM CDT | Flash Flood Warning | EAX | Caldwell, Clinton, Daviess, DeKalb, Ray | 4 hr |
| Jun 17, 6:11 PM CDT | Severe Thunderstorm Warning | GID | Buffalo | 49 min |
| Jun 17, 6:25 PM CDT | Tornado Warning | GID | Buffalo, Sherman | 35 min |
| Jun 17, 6:45 PM CDT | Severe Thunderstorm Warning | GID | Howard, Sherman, Valley | 45 min |
| Jun 17, 6:46 PM CDT | Severe Thunderstorm Warning | GID | Buffalo, Hall, Howard, Sherman | 44 min |
| Jun 17, 6:56 PM CDT | Tornado Warning | GID | Buffalo, Hall | 34 min |
| Jun 17, 7:08 PM CDT | Severe Thunderstorm Warning | GID | Greeley, Valley | 52 min |
| Jun 17, 7:21 PM CDT | Tornado Warning | GID | Buffalo, Hall | 24 min |
| Jun 17, 7:43 PM CDT | Severe Thunderstorm Warning | GID | Hall | 47 min |
| Jun 17, 7:55 PM CDT | Tornado Warning | GID | Hall | 35 min |
| Jun 17, 8:07 PM CDT | Severe Thunderstorm Warning | GID | Hall, Hamilton, Merrick | 38 min |
| Jun 17, 8:09 PM CDT | Tornado Warning | GID | Hall | 36 min |
| Jun 17, 8:18 PM CDT | Tornado Warning | GID | Buffalo, Sherman | 27 min |
| Jun 17, 8:28 PM CDT | Severe Thunderstorm Warning | GID | Sherman | 47 min |
| Jun 17, 8:42 PM CDT | Tornado Warning | GID | Hall, Hamilton, Merrick | 33 min |
| Jun 17, 8:46 PM CDT | Severe Thunderstorm Warning | GID | Hall, Hamilton, Merrick | 44 min |
| Jun 17, 8:46 PM CDT | Tornado Warning | GID | Sherman | 29 min |
| Jun 17, 8:48 PM CDT | Severe Thunderstorm Warning | GID | Hamilton, York | 42 min |
| Jun 17, 8:55 PM CDT | Severe Thunderstorm Warning | GID | Hamilton | 50 min |
| Jun 17, 8:58 PM CDT | Tornado Warning | GID | Hamilton | 32 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 12:00Z, 5.9 hours before the alert went out and 56 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
- 1476 J/kg
- Mixed-layer CIN
- -141 J/kg
- Mixed-layer LCL
- 1342 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 130 m²/s²
- 0-3 km storm-relative helicity
- 146 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 |
|---|---|---|---|---|
| Jun 16, 8:47 PM CDT | Mesoscale Discussion | SPC | Lyon, Sioux | 58 min |
| Jun 17, 2:47 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Cass, Fremont, Mills, Montgomery and 5 more | 28 min |
| Jun 17, 5:43 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Buena Vista, Calhoun, Carroll and 28 more | 92 min |
| Jun 17, 6:21 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Audubon, Boone, Buena Vista, Calhoun, Carroll and 29 more | 7 hr |
| Jun 17, 6:44 PM CDT | Mesoscale Discussion | SPC | Bremer, Butler, Cerro Gordo, Chickasaw, Fayette, Floyd and 4 more | 31 min |
| Jun 16, 8:26 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Bourbon, Butler, Chautauqua, Cherokee, Cowley and 11 more | 3 hr |
| Jun 16, 10:48 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Butler, Chautauqua, Cherokee and 10 more | 87 min |
| Jun 17, 12:17 PM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Clay, Cloud, Jackson, Jewell and 12 more | 58 min |
| Jun 17, 2:29 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Decatur, Graham, Norton, Phillips, Rawlins and 5 more | 61 min |
| Jun 17, 3:09 PM CDT | Tornado Watch | SPC | Johnson, Leavenworth, Wyandotte | 7 hr |
| Jun 17, 3:30 PM CDT | Tornado Watch | SPC | Cheyenne, Decatur, Norton, Rawlins, Sherman, Thomas | 8 hr |
| Jun 17, 3:55 PM CDT | Severe Thunderstorm Watch | SPC | Barber, Clark, Comanche, Edwards, Ford, Kiowa and 4 more | 7 hr |
| Jun 17, 5:26 PM CDT | Mesoscale Discussion | SPC | Barber, Clark, Comanche, Edwards, Ford, Kiowa and 4 more | 94 min |
| Jun 17, 3:07 PM CDT | Mesoscale Discussion | SPC | Bollinger, Cape Girardeau, Jefferson, Madison, Perry, Sainte Genevieve and 2 more | 23 min |
| Jun 17, 6:42 PM CDT | Mesoscale Discussion | SPC | Audrain, Boone, Buchanan, Caldwell, Callaway, Carroll and 43 more | 2 hr |
| Jun 17, 5:02 PM CDT | Mesoscale Discussion | SPC | Boyd, Cherry, Dawes, Holt, Keya Paha, Rock and 1 more | 88 min |
| Jun 17, 6:35 PM CDT | Severe Thunderstorm Watch | SPC | Cherry, Grant, Hooker, Sheridan, Thomas | 7 hr |
Nearby
Tornado Watches in Nebraska, 2009Tornado Watches in Iowa, 2009Tornado Watches in Kansas, 2009Every tornado watch in 2009
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.