Alert archive / Iowa / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 237, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Jun 29, 1998, 12:03 PM CDT for Monona County, Iowa. It was in force for 47 min. 5 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 29, 1998, 12:03 PM CDT (17:03 UTC)
- Expired
- Jun 29, 1998, 12:50 PM CDT
- In force
- 47 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
County Monona County, IA
The radar
The Omaha radar (KOAX), 88 km from the middle of the area, began a volume at 17:06 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 was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 29, 12:15 PM CDT | Thunderstorm Wind 65 | Whiting, IA | Trees and power lines downed. |
| Jun 29, 12:15 PM CDT | Thunderstorm Wind 65 | Onawa, IA | Widespread trees damage. Power lines downed. |
| Jun 29, 12:20 PM CDT | Thunderstorm Wind 61 | Turin, IA | Metal/wood cafe destroyed. Metal grain bin destroyed. Trees downed. |
| Jun 29, 12:30 PM CDT | Hail 0.75 | Soldier, IA | |
| Jun 29, 12:30 PM CDT | Thunderstorm Wind 52 | Soldier, IA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 29, 11:15 AM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 5.1 hours before the alert went out and 88 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
- 2006 J/kg
- Mixed-layer CIN
- -188 J/kg
- Mixed-layer LCL
- 850 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 154 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 9:48 PM CDT | Severe Thunderstorm Warning | OAX | Richardson | 32 min |
| Jun 28, 11:21 PM CDT | Severe Thunderstorm Warning | OAX | Pawnee | 49 min |
| Jun 28, 11:51 PM CDT | Severe Thunderstorm Warning | OAX | Richardson | 49 min |
| Jun 28, 11:55 PM CDT | Flash Flood Warning | OAX | Richardson | 6 hr |
| Jun 29, 12:22 AM CDT | Severe Thunderstorm Warning | OAX | Gage | 48 min |
| Jun 29, 9:51 AM CDT | Severe Thunderstorm Warning | OAX | Knox | 64 min |
| Jun 29, 10:31 AM CDT | Tornado Warning | OAX | Knox | 34 min |
| Jun 29, 10:42 AM CDT | Tornado Warning | OAX | Cedar, Pierce | 48 min |
| Jun 29, 11:05 AM CDT | Tornado Warning | OAX | Wayne | 50 min |
| Jun 29, 11:29 AM CDT | Tornado Warning | OAX | Cuming, Thurston | 46 min |
| Jun 29, 11:57 AM CDT | Tornado Warning | OAX | Burt | 48 min |
| Jun 29, 3:25 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Seward | 50 min |
| Jun 29, 3:39 PM CDT | Tornado Warning | OAX | Seward | 51 min |
| Jun 29, 4:08 PM CDT | Tornado Warning | OAX | Lancaster, Saline | 62 min |
| Jun 29, 4:39 PM CDT | Severe Thunderstorm Warning | OAX | Gage | 61 min |
| Jun 29, 4:56 PM CDT | Severe Thunderstorm Warning | OAX | Otoe | 49 min |
| Jun 29, 5:06 PM CDT | Severe Thunderstorm Warning | OAX | Johnson | 49 min |
| Jun 29, 12:30 PM CDT | Severe Thunderstorm Warning | OAX | Harrison | 60 min |
| Jun 29, 12:45 PM CDT | Tornado Warning | OAX | Shelby | 35 min |
| Jun 29, 4:46 PM CDT | Severe Thunderstorm Warning | OAX | Fremont | 34 min |
| Jun 29, 5:36 PM CDT | Severe Thunderstorm Warning | OAX | Page | 49 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1998Every severe thunderstorm warning in 1998
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.