Alert archive / Iowa / Tornado Warnings in 1998
Tornado Warning 49, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Jun 29, 1998, 2:53 PM CDT for Johnson County, Iowa. It was in force for 62 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
- Jun 29, 1998, 2:53 PM CDT (19:53 UTC)
- Expired
- Jun 29, 1998, 3:55 PM CDT
- In force
- 62 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties
County Johnson County, IA
The radar
The Quad Cities radar (KDVN), 84 km from the middle of the area, began a volume at 19:55 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 |
|---|---|---|---|
| Jun 29, 1:00 PM CDT | Tornado Watch | SPC | 4 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 7.9 hours before the alert went out and 91 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
- 917 J/kg
- Mixed-layer CIN
- -115 J/kg
- Mixed-layer LCL
- 762 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
337 WFUS1 KMLI 291955 TORMLI IAC103-292055- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 253 PM CDT MON JUN 29 1998 THE NATIONAL WEATHER SERVICE IN QUAD CITIES IA HAS ISSUED A * TORNADO WARNING FOR... JOHNSON COUNTY IN EAST CENTRAL IOWA * UNTIL 355 PM CDT * AT 254 PM CDT... DOPPLER RADAR INDICATED A DEVELOPING TORNADO 8 MILES WEST OF IOWA CITY OR 4 MILES WEST OF OAKDALE MOVING EAST AT 35 MPH. * THE TORNADO IS EXPECTED TO BE NEAR... NORTH LIBERTY AROUND 300 PM CDT OAKDALE AROUND 300 PM CDT TWIN VIEW HGTS AROUND 300 PM CDT CORALVILLE AROUND 300 PM CDT IOWA CITY AROUND 305 PM CDT GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR BERG
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 1:53 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Iowa | 62 min |
| Jun 29, 2:11 PM CDT | Severe Thunderstorm Warning | DVN | Keokuk | 64 min |
| Jun 29, 2:24 PM CDT | Tornado Warning | DVN | Benton, Iowa | 36 min |
| Jun 29, 2:30 PM CDT | Severe Thunderstorm Warning | DVN | Johnson, Linn | 65 min |
| Jun 29, 2:42 PM CDT | Tornado Warning | DVN | Keokuk | 33 min |
| Jun 29, 2:46 PM CDT | Severe Thunderstorm Warning | DVN | Jefferson, Washington | 64 min |
| Jun 29, 2:55 PM CDT | Tornado Warning | DVN | Washington | 65 min |
| Jun 29, 3:07 PM CDT | Tornado Warning | DVN | Cedar, Muscatine | 63 min |
| Jun 29, 3:07 PM CDT | Tornado Warning | DVN | Henry, Louisa | 63 min |
| Jun 29, 3:07 PM CDT | Tornado Warning | DVN | Van Buren | 63 min |
| Jun 29, 3:22 PM CDT | Tornado Warning | DVN | Des Moines, Lee | 63 min |
| Jun 29, 3:26 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Scott | 64 min |
| Jun 29, 6:03 PM CDT | Tornado Warning | DVN | Lee | 62 min |
Nearby
Tornado Warnings in Iowa, 1998Every tornado warning in 1998Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.