Alert archive / Illinois / Tornado Warnings in 1997
Tornado Warning 7, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Apr 30, 1997, 3:30 PM CDT for Henry County, Illinois. It was in force for 50 min. 1 report 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
- Apr 30, 1997, 3:30 PM CDT (20:30 UTC)
- Expired
- Apr 30, 1997, 4:20 PM CDT
- In force
- 50 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties
County Henry County, IL
The radar
The Quad Cities radar (KDVN), 47 km from the middle of the area, began a volume at 20:34 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 |
|---|---|---|---|
| Apr 30, 3:30 PM CDT | Tornado F0 | Galva, IL |
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 |
|---|---|---|---|
| Apr 30, 12:30 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 8.5 hours before the alert went out and 43 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1366 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 180 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMLI 302031 RRA TORMLI ILC073-302120- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 330 PM CDT WED APR 30 1997 * TORNADO WARNING FOR EASTERN HENRY COUNTY ILLINOIS - NORTHWESTERN ILLINOIS * UNTIL 420 PM CDT * SOME LOCATIONS AFFECTED GALVA KEWANEE SAUK TRAIL STATE PARK * AT 330 PM CDT SPOTTERS REPORTED A TORNADO 1 MILE SOUTH OF GALVA MOVING EAST NORTHEAST AT 40 MPH. * THE STORM WILL BE GALVA AT 330 PM CDT AND KEWANEE AT 340 PM CDT. IF YOU ARE NEAR THIS DANGEROUS STORM, TAKE COVER IMMEDIATELY IN THE LOWEST FLOOR AND INNERMOST ROOM OF A BUILDING. WOLF &
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 1:36 PM CDT | Severe Thunderstorm Warning | DVN | Hancock | 34 min |
| Apr 30, 1:41 PM CDT | Tornado Warning | DVN | Hancock | 34 min |
| Apr 30, 2:06 PM CDT | Tornado Warning | DVN | McDonough | 34 min |
| Apr 30, 2:22 PM CDT | Tornado Warning | DVN | Warren | 48 min |
| Apr 30, 4:46 PM CDT | Tornado Warning | DVN | Carroll, Whiteside | 34 min |
| Apr 30, 4:58 PM CDT | Tornado Warning | DVN | Jo Daviess | 32 min |
Nearby
Tornado Warnings in Illinois, 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.