Alert archive / Iowa / Severe Thunderstorm Warnings in 2022
Severe Thunderstorm Warning 261, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Aug 18, 2022, 8:10 PM CDT for Burt County, Nebraska; Harrison County, Monona County, Iowa. It was in force for 50 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
- Aug 18, 2022, 8:10 PM CDT (01:10 UTC)
- Expired
- Aug 18, 2022, 9:00 PM CDT
- In force
- 50 min
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Harrison County, IA, Monona County, IA, Burt County, NE
The radar
The Omaha radar (KOAX), 66 km from the middle of the area, began a volume at 01:10 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 |
|---|---|---|---|
| Aug 18, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 1.2 hours before the alert went out and 66 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
- 1016 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 1810 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 7:39 PM CDT | Special Weather Statement | OAX | Thurston | 36 min |
| Aug 18, 7:42 PM CDT | Severe Thunderstorm Warning | OAX | Burt, Thurston | 36 min |
| Aug 18, 8:58 PM CDT | Severe Thunderstorm Warning | OAX | Burt | 18 min |
| Aug 19, 5:16 AM CDT | Special Weather Statement | OAX | Stanton | 14 min |
| Aug 19, 5:28 AM CDT | Special Weather Statement | OAX | Stanton | 17 min |
| Aug 19, 2:31 PM CDT | Severe Thunderstorm Warning | OAX | Saline, Seward | 44 min |
| Aug 19, 2:36 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Johnson, Lancaster, Nemaha, Otoe | 54 min |
| Aug 19, 3:12 PM CDT | Severe Thunderstorm Warning | OAX | Lancaster, Seward | 21 min |
| Aug 19, 3:17 PM CDT | Severe Thunderstorm Warning | OAX | Johnson, Nemaha, Otoe, Pawnee, Richardson | 58 min |
| Aug 19, 3:19 PM CDT | Special Weather Statement | OAX | Douglas | 26 min |
| Aug 19, 3:22 PM CDT | Special Weather Statement | OAX | Sarpy | 23 min |
| Aug 19, 4:48 PM CDT | Special Weather Statement | OAX | Jefferson | 42 min |
| Aug 19, 4:53 PM CDT | Special Weather Statement | OAX | Nemaha | 52 min |
| Aug 19, 6:01 PM CDT | Special Weather Statement | OAX | Johnson | 29 min |
| Aug 19, 6:04 PM CDT | Severe Thunderstorm Warning | OAX | Johnson, Nemaha, Pawnee | 26 min |
| Aug 19, 6:58 PM CDT | Special Weather Statement | OAX | Richardson | 47 min |
| Aug 19, 3:03 PM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie, Shelby | 42 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2022Severe Thunderstorm Warnings in Nebraska, 2022Every severe thunderstorm warning in 2022
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.