Alert archive / Nebraska / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 443
The Storm Prediction Center issued this severe thunderstorm watch at Jun 22, 2007, 2:56 PM CDT for 8 counties in Iowa; 19 counties in Nebraska. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 22, 2007, 2:56 PM CDT (19:56 UTC)
- Expired
- Jun 22, 2007, 9:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 27 counties
Fremont County, IA, Harrison County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Shelby County, IA, Burt County, NE, Butler County, NE, Cass County, NE, Clay County, NE, Colfax County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Hamilton County, NE, Lancaster County, NE, Nuckolls County, NE, Otoe County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Thayer County, NE, Washington County, NE, York County, NE
The radar
The Omaha radar (KOAX), 62 km from the middle of the area, began a volume at 19:59 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
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 40%
- 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 |
|---|---|---|---|---|
| Jun 22, 4:25 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Seward | 35 min |
| Jun 22, 4:35 PM CDT | Severe Thunderstorm Warning | OAX | Saunders | 40 min |
| Jun 22, 4:45 PM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie, Shelby | 45 min |
| Jun 22, 4:54 PM CDT | Severe Thunderstorm Warning | OAX | Seward | 36 min |
| Jun 22, 5:38 PM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie | 52 min |
| Jun 22, 5:46 PM CDT | Severe Thunderstorm Warning | GID | York | 59 min |
| Jun 22, 6:37 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Seward | 38 min |
| Jun 22, 7:18 PM CDT | Severe Thunderstorm Warning | GID | Clay | 42 min |
| Jun 22, 7:23 PM CDT | Severe Thunderstorm Warning | OAX | Fremont | 52 min |
| Jun 22, 8:13 PM CDT | Severe Thunderstorm Warning | OAX | Fremont | 47 min |
| Jun 22, 8:25 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Lancaster | 50 min |
| Jun 22, 8:26 PM CDT | Severe Thunderstorm Warning | GID | Nuckolls | 64 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, 7.9 hours before the alert went out and 61 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
- 236 J/kg
- Mixed-layer CIN
- -370 J/kg
- Mixed-layer LCL
- 1448 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 13 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 22, 1:41 PM CDT | Mesoscale Discussion | SPC | Appanoose, Benton, Black Hawk, Boone, Clarke, Dallas and 31 more | 64 min |
| Jun 22, 1:49 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Benton, Black Hawk and 51 more | 7 hr |
| Jun 22, 2:21 PM CDT | Mesoscale Discussion | SPC | Crawford, Fremont, Harrison, Ida, Mills, Monona and 5 more | 114 min |
| Jun 21, 7:15 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Buffalo, Clay, Dawson, Fillmore, Franklin and 19 more | 6 hr |
| Jun 21, 9:45 PM CDT | Mesoscale Discussion | SPC | Antelope, Boone, Boyd, Burt, Butler, Cedar and 21 more | 2 hr |
| Jun 22, 3:00 PM CDT | Mesoscale Discussion | SPC | Banner, Chase, Cheyenne, Deuel, Dundy, Kimball | 3 hr |
Nearby
Severe Thunderstorm Watches in Nebraska, 2007Severe Thunderstorm Watches in Iowa, 2007Every severe thunderstorm watch in 2007
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.