Alert archive / Nebraska / Severe Thunderstorm Watches in 2014
Severe Thunderstorm Watch 128
The Storm Prediction Center issued this severe thunderstorm watch at May 7, 2014, 8:18 PM CDT for 7 counties in Iowa; 13 counties in Nebraska. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 7, 2014, 8:18 PM CDT (01:18 UTC)
- Expired
- May 8, 2014, 1:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Fremont County, IA, Harrison County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Shelby County, IA, Cass County, NE, Douglas County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Washington County, NE
The radar
The Omaha radar (KOAX), 57 km from the middle of the area, began a volume at 01:18 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 60%
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 |
|---|---|---|---|---|
| May 7, 8:51 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Sarpy, Saunders | 24 min |
| May 7, 8:53 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie, Shelby | 37 min |
| May 7, 9:27 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Saunders, Seward | 33 min |
| May 7, 9:37 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie | 38 min |
| May 7, 9:58 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Saunders | 32 min |
| May 7, 10:46 PM CDT | Severe Thunderstorm Warning | OAX | Dodge, Washington | 29 min |
| May 8, 12:12 AM CDT | Severe Thunderstorm Warning | OAX | Burt, Dodge, Saunders, Washington | 33 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, 1.3 hours before the alert went out and 57 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 4332 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 53 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 7, 7:48 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Cass, Fremont, Guthrie and 7 more | 87 min |
| May 7, 9:44 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 16 more | 91 min |
| May 8, 3:46 AM CDT | Mesoscale Discussion | SPC | Clay, Dickinson, Emmet, Lyon, O'Brien, Osceola and 2 more | 119 min |
| May 8, 12:23 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Butler and 40 more | 2 hr |
| May 8, 1:46 PM CDT | Tornado Watch | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 45 more | 7 hr |
| May 8, 5:56 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 42 more | 94 min |
| May 8, 3:22 PM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Butler, Chautauqua, Coffey, Cowley and 14 more | 113 min |
| May 8, 3:44 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Anderson, Atchison, Bourbon, Brown, Chautauqua and 23 more | 6 hr |
| May 8, 6:39 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Atchison, Bourbon, Chautauqua, Cherokee and 20 more | 2 hr |
| May 7, 7:26 PM CDT | Severe Thunderstorm Watch | SPC | Blaine, Brown, Buffalo, Custer, Dawson, Garfield and 9 more | 4 hr |
| May 7, 7:34 PM CDT | Mesoscale Discussion | SPC | Arthur, Banner, Chase, Cheyenne, Deuel, Dundy and 10 more | 56 min |
Nearby
Severe Thunderstorm Watches in Nebraska, 2014Severe Thunderstorm Watches in Iowa, 2014Every severe thunderstorm watch in 2014
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.