Alert archive / Iowa / Tornado Warnings in 1997
Tornado Warning 28, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Jun 21, 1997, 1:20 AM CDT for Delaware County, Linn County, Iowa. It was in force for 60 min. 8 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 21, 1997, 1:20 AM CDT (06:20 UTC)
- Expired
- Jun 21, 1997, 2:20 AM CDT
- In force
- 60 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties
Counties Delaware County, IA, Linn County, IA
The radar
The Quad Cities radar (KDVN), 105 km from the middle of the area, began a volume at 06:07 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 21, 1:28 AM CDT | Thunderstorm Wind 60 | Center Pt, IA | Trees downed. |
| Jun 21, 1:37 AM CDT | Thunderstorm Wind 60 | Central City, IA | Numerous trees and branches down. |
| Jun 21, 1:40 AM CDT | Hail 1.75 | Coggon, IA | |
| Jun 21, 1:42 AM CDT | Thunderstorm Wind 57 | Troy Mills, IA | 65 mph wind gust reported. |
| Jun 21, 1:42 AM CDT | Hail 1.75 | Prairieburg, IA | |
| Jun 21, 1:42 AM CDT | Thunderstorm Wind 57 | Prairieburg, IA | Winds downed a local landmark 80 foot tall Cedar tree. The tree damaged the roof of a vacant, soon to be demolished, house. |
| Jun 21, 1:57 AM CDT | Thunderstorm Wind 52 | Hopkinton, IA | 60 mph wind gust reported by Fire Department. |
| Jun 21, 1:57 AM CDT | Hail 1.25 | Ryan, 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 20, 11:45 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 6.3 hours before the alert went out and 109 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
- 4926 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 969 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 216 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
431 WFUS1 KMLI 210622 RRA TORMLI IAC055-113-210720- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 120 AM CDT SAT JUN 21 1997 * TORNADO WARNING FOR DELAWARE COUNTY IN NORTHEASTERN IOWA LINN COUNTY IN EAST CENTRAL IOWA * UNTIL 220 AM CDT * SOME LOCATIONS AFFECTED TROY MILLS AROUND 120 AM CDT PARIS AROUND 135 AM CDT COGGON AROUND 140 AM CDT CENTRAL CITY AROUND 140 AM CDT RYAN AROUND 145 AM CDT * AT 119 AM CDT...A POSSIBLE TORNADO WAS INDICATED BY QUAD CITIES IA DOPPLER RADAR 22 MILES NORTH OF CEDAR RAPIDS OR 3 MILES NORTHWEST OF TROY MILLS MOVING EAST AT 25 MPH. IF YOU LIVE IN THE PATH OF THIS STORM...SEEK SHELTER IMMEDIATELY THIS SEVERE STORM HAS HAD A HISTORY OF PRODUCING TORNADOES AND WINDS UP TO 80 MPH. IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE TO BE IS IN A BASEMENT. GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...FIND SHELTER IN AN INTERIOR ROOM SUCH AS A CLOSET ON THE LOWEST FLOOR. USE BLANKETS...PILLOWS...OR CUSHIONS TO COVER YOUR BODY. AVOID WINDOWS. TEH/PAB
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 11:32 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque | 63 min |
| Jun 21, 12:51 AM CDT | Tornado Warning | DVN | Buchanan | 64 min |
| Jun 21, 1:04 AM CDT | Severe Thunderstorm Warning | DVN | Benton | 61 min |
| Jun 21, 1:46 AM CDT | Tornado Warning | DVN | Jones | 64 min |
| Jun 21, 1:52 AM CDT | Tornado Warning | DVN | Dubuque | 63 min |
| Jun 21, 2:05 AM CDT | Severe Thunderstorm Warning | DVN | Iowa, Johnson | 65 min |
| Jun 21, 2:20 AM CDT | Severe Thunderstorm Warning | DVN | Jackson | 60 min |
| Jun 21, 3:58 AM CDT | Severe Thunderstorm Warning | DVN | Keokuk | 62 min |
| Jun 21, 4:01 AM CDT | Severe Thunderstorm Warning | DVN | Washington | 59 min |
| Jun 21, 4:10 AM CDT | Severe Thunderstorm Warning | DVN | Jefferson | 65 min |
| Jun 21, 4:19 AM CDT | Severe Thunderstorm Warning | DVN | Henry, Louisa | 61 min |
| Jun 21, 4:46 AM CDT | Severe Thunderstorm Warning | DVN | Muscatine | 64 min |
| Jun 21, 4:53 AM CDT | Tornado Warning | DVN | Jones | 47 min |
| Jun 21, 4:55 AM CDT | Severe Thunderstorm Warning | DVN | Cedar | 45 min |
| Jun 21, 4:56 AM CDT | Severe Thunderstorm Warning | DVN | Des Moines | 49 min |
| Jun 21, 5:07 AM CDT | Severe Thunderstorm Warning | DVN | Clinton, Scott | 58 min |
| Jun 21, 5:22 AM CDT | Severe Thunderstorm Warning | DVN | Jackson | 48 min |
Nearby
Tornado Warnings in Iowa, 1997Every tornado warning in 1997Tornadoes in 1997
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.