Alert archive / Iowa / Tornado Warnings in 1998
Tornado Warning 46, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Jun 27, 1998, 10:38 PM CDT for Bremer County, Butler County, Iowa. It was in force for 32 min. 3 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 27, 1998, 10:38 PM CDT (03:38 UTC)
- Expired
- Jun 27, 1998, 11:10 PM CDT
- In force
- 32 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Bremer County, IA, Butler County, IA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 27, 10:57 PM CDT | Tornado F2 | Waverly, IA | |
| Jun 27, 11:05 PM CDT | Thunderstorm Wind 56 | Waverly, IA | |
| Jun 27, 11:07 PM CDT | Hail 1.75 | Waverly, 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 27, 7:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 3.6 hours before the alert went out and 211 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
- 4171 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 1286 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 103 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 4.1
The text
As transmitted, in the capitals the NWS used until 2016.
925 WFUS1 KDSM 280339 RRA TORDSM IAC017-023-280410- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DES MOINES IA 1038 PM CDT SAT JUN 27 1998 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * TORNADO WARNING FOR... SOUTHERN BREMER COUNTY IN NORTHEASTERN IOWA EXTREME EASTERN BUTLER COUNTY IN NORTH CENTRAL IOWA * UNTIL 1110 PM CDT * AT 1036 PM CDT... STORM SPOTTERS REPORTED A TORNADO 18 MILES NORTHWEST OF WATERLOO OR 4 MILES WEST SOUTHWEST OF SHELL ROCK MOVING EAST NORTHEAST AT 30 MPH. * THIS TORNADO CAN BE EXPECTED NEAR... SHELL ROCK BY 1042 PM CDT WAVERLY BY 1050 PM CDT DENVER BY 1100 PM CDT READLYN BY 1106 PM CDT A TORNADO IS ON THE GROUND GO TO THE BASEMENT IF A BASEMENT IS NOT AVAILABLE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR MYERS
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 7:27 PM CDT | Tornado Warning | DMX | Worth | 33 min |
| Jun 27, 7:38 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 47 min |
| Jun 27, 7:41 PM CDT | Tornado Warning | DMX | Cerro Gordo | 34 min |
| Jun 27, 8:15 PM CDT | Tornado Warning | DMX | Franklin | 35 min |
| Jun 27, 8:18 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 32 min |
| Jun 27, 8:44 PM CDT | Flash Flood Warning | DMX | Cerro Gordo | 3 hr |
| Jun 27, 8:49 PM CDT | Tornado Warning | DMX | Cerro Gordo | 21 min |
| Jun 27, 8:54 PM CDT | Severe Thunderstorm Warning | DMX | Pocahontas | 36 min |
| Jun 27, 10:08 PM CDT | Tornado Warning | DMX | Butler | 32 min |
| Jun 27, 10:33 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Guthrie | 62 min |
| Jun 27, 10:33 PM CDT | Severe Thunderstorm Warning | DMX | Boone | 62 min |
| Jun 27, 10:45 PM CDT | Severe Thunderstorm Warning | DMX | Butler | 50 min |
| Jun 27, 10:57 PM CDT | Severe Thunderstorm Warning | DMX | Grundy | 48 min |
| Jun 27, 11:01 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Polk, Story | 64 min |
| Jun 27, 11:10 PM CDT | Severe Thunderstorm Warning | DMX | Bremer | 50 min |
| Jun 27, 11:18 PM CDT | Severe Thunderstorm Warning | DMX | Polk | 62 min |
| Jun 27, 11:18 PM CDT | Severe Thunderstorm Warning | DMX | Marshall | 62 min |
| Jun 27, 11:21 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 64 min |
| Jun 27, 11:24 PM CDT | Severe Thunderstorm Warning | DMX | Adams, Ringgold, Taylor, Union | 61 min |
| Jun 28, 12:01 AM CDT | Severe Thunderstorm Warning | DMX | Tama | 64 min |
| Jun 28, 12:05 AM CDT | Severe Thunderstorm Warning | DMX | Jasper | 65 min |
| Jun 28, 12:40 AM CDT | Severe Thunderstorm Warning | DMX | Poweshiek | 65 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.