Alert archive / Nebraska / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 201, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Oct 11, 2020, 9:54 PM CDT for 5 counties in Nebraska. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Oct 11, 2020, 9:54 PM CDT (02:54 UTC)
- Expired
- Oct 11, 2020, 10:30 PM CDT
- In force
- 36 min
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 65.0 mph
Counties Cass County, NE, Lancaster County, NE, Otoe County, NE, Sarpy County, NE, Saunders County, NE
The radar
The Omaha radar (KOAX), 43 km from the middle of the area, began a volume at 02:55 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Oct 11, 4:54 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 2.9 hours before the alert went out and 43 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
- 550 J/kg
- Mixed-layer CIN
- -165 J/kg
- Mixed-layer LCL
- 2135 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 240 m²/s²
- 0-3 km storm-relative helicity
- 319 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.6
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 11, 7:16 PM CDT | Severe Thunderstorm Warning | OAX | Cuming | 29 min |
| Oct 11, 7:22 PM CDT | Severe Thunderstorm Warning | OAX | Colfax, Cuming, Dodge | 38 min |
| Oct 11, 7:35 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Colfax, Platte | 25 min |
| Oct 11, 7:43 PM CDT | Severe Thunderstorm Warning | OAX | Burt, Cuming, Dodge | 32 min |
| Oct 11, 9:15 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Jefferson, Lancaster, Saline, Seward | 30 min |
| Oct 11, 9:27 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Cass, Lancaster, Saunders, Seward | 48 min |
| Oct 11, 9:38 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Jefferson, Lancaster, Saline | 37 min |
| Oct 11, 10:03 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Jefferson, Johnson, Lancaster, Otoe, Pawnee | 42 min |
| Oct 11, 10:10 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Douglas, Sarpy, Saunders | 35 min |
| Oct 11, 10:15 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Gage, Jefferson, Johnson, Lancaster, Nemaha and 3 more | 45 min |
| Oct 11, 10:31 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Otoe, Sarpy | 44 min |
| Oct 11, 10:45 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Johnson, Nemaha, Otoe, Pawnee, Richardson | 45 min |
| Oct 11, 11:23 PM CDT | Severe Thunderstorm Warning | OAX | Nemaha, Richardson | 37 min |
| Oct 11, 10:59 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Montgomery, Page, Pottawattamie | 46 min |
| Oct 11, 11:40 PM CDT | Severe Thunderstorm Warning | OAX | Montgomery, Page | 35 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2020Every severe thunderstorm warning in 2020
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.