Alert archive / Nebraska / Severe Thunderstorm Watches in 2005
Severe Thunderstorm Watch 256
The Storm Prediction Center issued this severe thunderstorm watch at May 11, 2005, 11:50 PM CDT for 36 counties in Nebraska. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 11, 2005, 11:50 PM CDT (04:50 UTC)
- Expired
- May 12, 2005, 5:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 36 counties
Adams County, NE, Boone County, NE, Buffalo County, NE, Butler County, NE, Cass County, NE, Clay County, NE, Colfax County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Gage County, NE, Garfield County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Lancaster County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Otoe County, NE, Pawnee County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Valley County, NE, Washington County, NE, Wheeler County, NE, York County, NE
The radar
The Grand Island radar (KUEX), 115 km from the middle of the area, began a volume at 04:49 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
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 11:56 PM CDT | Severe Thunderstorm Warning | GID | Adams, Hall | 64 min |
| May 12, 12:10 AM CDT | Severe Thunderstorm Warning | GID | Buffalo | 32 min |
| May 12, 12:23 AM CDT | Severe Thunderstorm Warning | GID | Howard | 28 min |
| May 12, 12:32 AM CDT | Severe Thunderstorm Warning | GID | Hamilton | 58 min |
| May 12, 12:59 AM CDT | Severe Thunderstorm Warning | GID | Buffalo, Dawson | 15 min |
| May 12, 1:10 AM CDT | Severe Thunderstorm Warning | GID | Merrick, Polk | 29 min |
| May 12, 1:31 AM CDT | Severe Thunderstorm Warning | GID | Clay, Nuckolls | 31 min |
| May 12, 1:51 AM CDT | Severe Thunderstorm Warning | GID | York | 40 min |
| May 12, 3:23 AM CDT | Flash Flood Warning | OAX | Butler, Seward | 6 hr |
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, 4.8 hours before the alert went out and 124 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
- 86 J/kg
- Mixed-layer CIN
- -281 J/kg
- Mixed-layer LCL
- 708 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 316 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 |
|---|---|---|---|---|
| May 11, 7:02 PM CDT | Mesoscale Discussion | SPC | Adams, Arthur, Boone, Buffalo, Butler, Chase and 33 more | 88 min |
| May 11, 8:01 PM CDT | Mesoscale Discussion | SPC | Dundy, Hitchcock, Red Willow | 59 min |
| May 11, 9:50 PM CDT | Tornado Watch | SPC | Adams, Buffalo, Clay, Franklin, Frontier, Furnas and 7 more | 7 hr |
| May 11, 11:02 PM CDT | Mesoscale Discussion | SPC | Adams, Blaine, Boone, Buffalo, Burt, Butler and 47 more | 58 min |
| May 12, 3:44 AM CDT | Mesoscale Discussion | SPC | Cass, Dodge, Fillmore, Gage, Jefferson, Johnson and 9 more | 61 min |
| May 12, 12:40 PM CDT | Mesoscale Discussion | SPC | Butler, Cass, Colfax, Gage, Johnson, Lancaster and 11 more | 95 min |
| May 12, 1:55 PM CDT | Tornado Watch | SPC | Butler, Cass, Douglas, Gage, Jefferson, Johnson and 9 more | 7 hr |
| May 12, 3:48 PM CDT | Mesoscale Discussion | SPC | Butler, Cass, Douglas, Gage, Jefferson, Johnson and 9 more | 87 min |
Nearby
Severe Thunderstorm Watches in Nebraska, 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.