Alert archive / Nebraska / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 405
The Storm Prediction Center issued this severe thunderstorm watch at May 30, 2011, 8:37 PM CDT for 5 counties in Iowa; 34 counties in Kansas; 48 counties in Nebraska. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 30, 2011, 8:37 PM CDT (01:37 UTC)
- Expired
- May 31, 2011, 2:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Particularly dangerous situation
- Yes
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 80 kt
All 87 counties
Cherokee County, IA, Harrison County, IA, Monona County, IA, Plymouth County, IA, Woodbury County, IA, Barber County, KS, Barton County, KS, Clay County, KS, Cloud County, KS, Comanche County, KS, Dickinson County, KS, Edwards County, KS, Ellis County, KS, Ellsworth County, KS, Geary County, KS, Harvey County, KS, Jewell County, KS, Kingman County, KS, Kiowa County, KS, Lincoln County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Mitchell County, KS, Osborne County, KS, Ottawa County, KS, Phillips County, KS, Pratt County, KS, Reno County, KS, Republic County, KS, Rice County, KS, Riley County, KS, Rooks County, KS, Rush County, KS, Russell County, KS, Saline County, KS, Smith County, KS, Stafford County, KS, Washington County, KS, Adams County, NE, Antelope County, NE, Boone County, NE, Buffalo County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Franklin County, NE, Gage County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Knox County, NE, Lancaster County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thayer County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, Webster County, NE, York County, NE
The radar
The Grand Island radar (KUEX), 87 km from the middle of the area, began a volume at 01:38 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
- 10%
- Ten or more severe wind reports
- 95%
- One or more gusts of 65 knots or more
- 80%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
31 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 8:38 PM CDT | Tornado Warning | GID | Buffalo | 37 min |
| May 30, 8:57 PM CDT | Severe Thunderstorm Warning | GID | Greeley, Howard, Sherman, Valley | 48 min |
| May 30, 8:59 PM CDT | Severe Thunderstorm Warning | GID | Adams, Buffalo, Franklin, Hall, Harlan, Howard and 2 more | 46 min |
| May 30, 9:03 PM CDT | Tornado Warning | GID | Adams, Kearney | 27 min |
| May 30, 9:08 PM CDT | Severe Thunderstorm Warning | GID | Osborne, Phillips, Rooks, Smith | 52 min |
| May 30, 9:20 PM CDT | Tornado Warning | GID | Franklin, Webster | 25 min |
| May 30, 9:25 PM CDT | Tornado Warning | GID | Adams, Clay | 23 min |
| May 30, 9:34 PM CDT | Severe Thunderstorm Warning | GID | Hamilton, Merrick, Nance | 41 min |
| May 30, 9:36 PM CDT | Severe Thunderstorm Warning | GID | Hamilton, Howard, Merrick, Nance | 39 min |
| May 30, 9:40 PM CDT | Severe Thunderstorm Warning | GID | Adams, Clay, Franklin, Hall, Hamilton, Kearney and 2 more | 50 min |
| May 30, 9:47 PM CDT | Severe Thunderstorm Warning | GID | Jewell, Mitchell, Osborne, Smith | 43 min |
| May 30, 9:57 PM CDT | Severe Thunderstorm Warning | DDC | Ellis | 48 min |
| May 30, 9:58 PM CDT | Severe Thunderstorm Warning | ICT | Russell | 62 min |
| May 30, 10:03 PM CDT | Severe Thunderstorm Warning | GID | Hamilton, Merrick, Nance, Polk, York | 42 min |
| May 30, 10:24 PM CDT | Severe Thunderstorm Warning | GID | Clay, Fillmore, Nuckolls, Thayer | 51 min |
| May 30, 10:26 PM CDT | Severe Thunderstorm Warning | ICT | Barton, Russell | 64 min |
| May 30, 10:27 PM CDT | Severe Thunderstorm Warning | TOP | Cloud, Republic | 48 min |
| May 30, 10:29 PM CDT | Severe Thunderstorm Warning | GID | Jewell, Mitchell, Osborne, Smith | 46 min |
| May 30, 10:33 PM CDT | Severe Thunderstorm Warning | DDC | Rush | 42 min |
| May 30, 10:34 PM CDT | Tornado Warning | GID | Fillmore, Nuckolls, Thayer | 26 min |
| May 30, 10:43 PM CDT | Severe Thunderstorm Warning | OAX | Burt, Colfax, Cuming, Dodge | 47 min |
| May 30, 10:49 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Colfax, Dodge, Saunders | 41 min |
| May 30, 10:53 PM CDT | Severe Thunderstorm Warning | DDC | Edwards, Hodgeman, Pawnee, Stafford | 52 min |
| May 30, 10:53 PM CDT | Severe Thunderstorm Warning | ICT | Ellsworth, Lincoln, Russell | 67 min |
| May 30, 10:57 PM CDT | Severe Thunderstorm Warning | DDC | Clark, Comanche, Edwards, Ford, Kiowa | 48 min |
| May 30, 11:05 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 40 min |
| May 30, 11:14 PM CDT | Severe Thunderstorm Warning | TOP | Cloud, Republic, Washington | 46 min |
| May 30, 11:19 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona | 41 min |
| May 30, 11:28 PM CDT | Severe Thunderstorm Warning | ICT | Barton, Ellsworth, Rice | 44 min |
| May 30, 11:44 PM CDT | Severe Thunderstorm Warning | DDC | Edwards, Pawnee, Stafford | 46 min |
| May 30, 11:52 PM CDT | Severe Thunderstorm Warning | DDC | Clark, Comanche, Ford, Kiowa | 38 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, 1.6 hours before the alert went out and 128 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
- 2253 J/kg
- Mixed-layer CIN
- -150 J/kg
- Mixed-layer LCL
- 998 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 230 m²/s²
- 0-3 km storm-relative helicity
- 331 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 4.9
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 8:43 PM CDT | Tornado Watch | SPC | Clay, Dickinson, Lyon, O'Brien, Osceola, Sioux | 5 hr |
| May 30, 10:09 PM CDT | Mesoscale Discussion | SPC | Clay, Dickinson, Lyon, O'Brien, Osceola, Sioux | 2 hr |
| May 30, 10:38 PM CDT | Mesoscale Discussion | SPC | Cherokee, Harrison, Ida, Monona, Plymouth, Woodbury | 2 hr |
| May 30, 8:13 PM CDT | Mesoscale Discussion | SPC | Barton, Cloud, Edwards, Ellis, Ellsworth, Ford and 24 more | 92 min |
Nearby
Severe Thunderstorm Watches in Nebraska, 2011Severe Thunderstorm Watches in Kansas, 2011Severe Thunderstorm Watches in Iowa, 2011Every severe thunderstorm watch in 2011
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.