Alert archive / Nebraska / Severe Thunderstorm Watches in 2005
Severe Thunderstorm Watch 653
The Storm Prediction Center issued this severe thunderstorm watch at Jul 20, 2005, 10:10 PM CDT for Monona County, Plymouth County, Woodbury County, Iowa; 22 counties in Nebraska; Bon Homme County, Clay County, Union County, South Dakota. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 20, 2005, 10:10 PM CDT (03:10 UTC)
- Expired
- Jul 21, 2005, 2:00 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 28 counties
Monona County, IA, Plymouth County, IA, Woodbury County, IA, Antelope County, NE, Boone County, NE, Boyd County, NE, Burt County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Garfield County, NE, Holt County, NE, Knox County, NE, Madison County, NE, Pierce County, NE, Platte County, NE, Rock County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, Wheeler County, NE, Bon Homme County, SD, Clay County, SD, Union County, SD
The radar
The Sioux Falls radar (KFSD), 166 km from the middle of the area, began a volume at 03:13 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
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 10:29 PM CDT | Severe Thunderstorm Warning | LBF | Boyd, Holt | 70 min |
| Jul 20, 10:42 PM CDT | Severe Thunderstorm Warning | OAX | Antelope, Knox | 33 min |
| Jul 20, 11:06 PM CDT | Severe Thunderstorm Warning | OAX | Cedar, Pierce | 60 min |
| Jul 20, 11:12 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme | 33 min |
| Jul 20, 11:14 PM CDT | Severe Thunderstorm Warning | OAX | Antelope, Knox | 31 min |
| Jul 20, 11:20 PM CDT | Severe Thunderstorm Warning | OAX | Madison | 57 min |
| Jul 20, 11:38 PM CDT | Severe Thunderstorm Warning | OAX | Stanton, Wayne | 67 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, 3.2 hours before the alert went out and 183 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
- 2624 J/kg
- Mixed-layer CIN
- -145 J/kg
- Mixed-layer LCL
- 2133 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 171 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 1:17 AM CDT | Mesoscale Discussion | SPC | Adair, Audubon, Benton, Black Hawk, Boone, Bremer and 43 more | 58 min |
| Jul 21, 4:05 AM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Clayton and 10 more | 5 hr |
| Jul 21, 5:28 AM CDT | Mesoscale Discussion | SPC | Allamakee, Benton, Bremer, Buchanan, Cedar, Chickasaw and 19 more | 92 min |
| Jul 21, 6:27 AM CDT | Mesoscale Discussion | SPC | Cedar, Clinton, Delaware, Des Moines, Dubuque, Henry and 8 more | 2 hr |
| Jul 20, 9:46 PM CDT | Mesoscale Discussion | SPC | Antelope, Blaine, Boone, Boyd, Brown, Cedar and 13 more | 89 min |
| Jul 20, 11:32 PM CDT | Mesoscale Discussion | SPC | Buffalo, Custer, Dawson, Hall, Hamilton, Howard and 5 more | 58 min |
| Jul 21, 12:47 PM CDT | Mesoscale Discussion | SPC | Corson, Haakon, Jackson, Meade, Pennington, Perkins and 1 more | 88 min |
| Jul 21, 5:00 PM CDT | Mesoscale Discussion | SPC | Butte, Corson, Custer, Fall River, Harding, Lawrence and 5 more | 90 min |
| Jul 21, 5:35 PM CDT | Severe Thunderstorm Watch | SPC | Campbell, Corson, Perkins, Walworth | 6 hr |
Nearby
Severe Thunderstorm Watches in Nebraska, 2005Severe Thunderstorm Watches in Iowa, 2005Severe Thunderstorm Watches in South Dakota, 2005Every severe thunderstorm watch in 2005
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.