Alert archive / Nebraska / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 600
The Storm Prediction Center issued this severe thunderstorm watch at Jul 5, 2011, 4:47 PM CDT for 4 states. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 5, 2011, 4:47 PM CDT (21:47 UTC)
- Expired
- Jul 6, 2011, 1:00 AM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 85 counties
Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Atchison County, KS, Brown County, KS, Cheyenne County, KS, Decatur County, KS, Doniphan County, KS, Jackson County, KS, Jefferson County, KS, Jewell County, KS, Marshall County, KS, Nemaha County, KS, Norton County, KS, Phillips County, KS, Pottawatomie County, KS, Rawlins County, KS, Republic County, KS, Smith County, KS, Washington County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Holt County, MO, Nodaway County, MO, Adams County, NE, Arthur County, NE, Buffalo County, NE, Butler County, NE, Cass County, NE, Chase County, NE, Clay County, NE, Colfax County, NE, Custer County, NE, Dawson County, NE, Deuel County, NE, Dodge County, NE, Douglas County, NE, Dundy County, NE, Fillmore County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gage County, NE, Garden County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Keith County, NE, Lancaster County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Perkins County, NE, Phelps County, NE, Platte County, NE, Polk County, NE, Red Willow 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, Washington County, NE, Webster County, NE, York County, NE
The radar
The Grand Island radar (KUEX), 75 km from the middle of the area, began a volume at 21:51 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
- 40%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
34 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 4:58 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Seward | 47 min |
| Jul 5, 5:01 PM CDT | Severe Thunderstorm Warning | GID | Hamilton, Merrick, Polk, York | 44 min |
| Jul 5, 5:03 PM CDT | Tornado Warning | GID | York | 27 min |
| Jul 5, 5:25 PM CDT | Flash Flood Warning | GID | Polk, York | 6 hr |
| Jul 5, 5:28 PM CDT | Severe Thunderstorm Warning | GID | York | 17 min |
| Jul 5, 5:39 PM CDT | Severe Thunderstorm Warning | OAX | Saline, Seward | 66 min |
| Jul 5, 5:44 PM CDT | Severe Thunderstorm Warning | GID | Fillmore, Hamilton, Polk, York | 37 min |
| Jul 5, 5:58 PM CDT | Severe Thunderstorm Warning | GID | Clay, Hamilton | 32 min |
| Jul 5, 5:58 PM CDT | Flash Flood Warning | OAX | Butler, Seward | 6 hr |
| Jul 5, 6:28 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Jefferson, Saline | 46 min |
| Jul 5, 6:32 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Johnson, Lancaster | 44 min |
| Jul 5, 6:56 PM CDT | Severe Thunderstorm Warning | GID | Clay, Fillmore | 34 min |
| Jul 5, 6:57 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Jefferson | 48 min |
| Jul 5, 7:03 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Johnson, Pawnee | 57 min |
| Jul 5, 7:05 PM CDT | Severe Thunderstorm Warning | TOP | Marshall, Nemaha, Washington | 40 min |
| Jul 5, 7:15 PM CDT | Severe Thunderstorm Warning | GID | Nuckolls, Thayer | 45 min |
| Jul 5, 7:28 PM CDT | Severe Thunderstorm Warning | GID | Clay, Fillmore | 15 min |
| Jul 5, 7:41 PM CDT | Severe Thunderstorm Warning | TOP | Marshall, Nemaha, Pottawatomie, Riley, Washington | 34 min |
| Jul 5, 7:54 PM CDT | Severe Thunderstorm Warning | TOP | Republic, Washington | 36 min |
| Jul 5, 7:59 PM CDT | Severe Thunderstorm Warning | GID | Thayer | 31 min |
| Jul 5, 8:04 PM CDT | Severe Thunderstorm Warning | TOP | Brown, Jackson, Nemaha | 41 min |
| Jul 5, 8:46 PM CDT | Severe Thunderstorm Warning | LBF | Custer | 44 min |
| Jul 5, 9:02 PM CDT | Severe Thunderstorm Warning | GID | Dawson | 43 min |
| Jul 5, 9:30 PM CDT | Severe Thunderstorm Warning | LBF | Chase, Perkins | 45 min |
| Jul 5, 9:41 PM CDT | Severe Thunderstorm Warning | GLD | Cheyenne | 49 min |
| Jul 5, 9:42 PM CDT | Severe Thunderstorm Warning | GID | Buffalo, Dawson, Gosper, Phelps | 48 min |
| Jul 5, 10:01 PM CDT | Severe Thunderstorm Warning | LBF | Chase | 44 min |
| Jul 5, 10:25 PM CDT | Severe Thunderstorm Warning | GLD | Dundy, Hitchcock | 65 min |
| Jul 5, 10:28 PM CDT | Severe Thunderstorm Warning | GID | Phelps | 47 min |
| Jul 5, 10:39 PM CDT | Severe Thunderstorm Warning | GID | Franklin, Kearney | 33 min |
| Jul 5, 10:42 PM CDT | Flash Flood Warning | GID | Dawson | 6 hr |
| Jul 5, 11:29 PM CDT | Severe Thunderstorm Warning | GLD | Decatur, Rawlins | 61 min |
| Jul 5, 11:38 PM CDT | Severe Thunderstorm Warning | LBF | Frontier, Hayes, Lincoln, Perkins | 52 min |
| Jul 6, 12:17 AM CDT | Flash Flood Warning | GLD | Dundy, Hitchcock | 3 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 12:00Z, 9.8 hours before the alert went out and 132 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
- 939 J/kg
- Mixed-layer CIN
- -259 J/kg
- Mixed-layer LCL
- 1038 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.8
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 2:49 PM CDT | Mesoscale Discussion | SPC | Fremont, Mills, Montgomery, Page, Pottawattamie | 86 min |
| Jul 5, 3:32 PM CDT | Mesoscale Discussion | SPC | Adair, Audubon, Boone, Buena Vista, Calhoun, Carroll and 23 more | 88 min |
| Jul 5, 6:10 PM CDT | Tornado Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Calhoun and 24 more | 4 hr |
| Jul 4, 11:14 PM CDT | Mesoscale Discussion | SPC | Boyd, Brown, Holt, Keya Paha, Rock | 91 min |
| Jul 5, 2:17 PM CDT | Mesoscale Discussion | SPC | Dawes, Sheridan | 73 min |
| Jul 5, 6:19 PM CDT | Mesoscale Discussion | SPC | Cheyenne | 56 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.