Alert archive / Illinois / Tornado Warnings in 1998
Tornado Warning 7, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Apr 7, 1998, 5:31 PM CDT for Warren County, Illinois. It was in force for 34 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
- Apr 7, 1998, 5:31 PM CDT (22:31 UTC)
- Expired
- Apr 7, 1998, 6:05 PM CDT
- In force
- 34 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties
County Warren County, IL
The radar
The Quad Cities radar (KDVN), 85 km from the middle of the area, began a volume at 22:31 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 7, 5:31 PM CDT | Tornado F0 | Monmouth, IL | |
| Apr 7, 5:42 PM CDT | Tornado F0 | Monmouth, IL | |
| Apr 7, 5:52 PM CDT | Tornado F1 | Monmouth, IL | |
| Apr 7, 6:02 PM CDT | Tornado F1 | Monmouth, IL | |
| Apr 7, 6:13 PM CDT | Tornado F0 | Gerlaw, 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 7, 2:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 10.5 hours before the alert went out and 86 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
- 1589 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 31 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 072231 RRA TORMLI ILC187-072305- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 531 PM CDT TUE APR 7 1998 * TORNADO WARNING FOR WARREN COUNTY - WEST CENTRAL ILLINOIS * UNTIL 605 PM CDT * SOME LOCATIONS AFFECTED BY THIS TORNADO ELEANOR AROUND 540 PM CDT GERLAW AROUND 545 PM CDT COLDBROOK AROUND 550 PM CDT UTAH AROUND 555 PM CDT ALEXIS AROUND 605 PM CDT * AT 530 PM CDT...SPOTTERS REPORTED A TORNADO 15 MILES WEST OF GALESBURG OR 7 MILES SOUTH OF ELEANOR MOVING NORTHEAST AT 25 MPH. GO TO THE BASEMENT AND GET UNDER A WORKBENCH OR STURDY PIECE OF FURNITURE. IF NO BASEMENT IS AVAILABLE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR! HLADIK &
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 4:25 PM CDT | Severe Thunderstorm Warning | DVN | Hancock | 50 min |
| Apr 7, 4:35 PM CDT | Tornado Warning | DVN | Hancock | 35 min |
| Apr 7, 4:50 PM CDT | Tornado Warning | DVN | McDonough | 50 min |
| Apr 7, 5:01 PM CDT | Severe Thunderstorm Warning | DVN | Warren | 49 min |
| Apr 7, 6:05 PM CDT | Tornado Warning | DVN | Warren | 35 min |
| Apr 7, 6:06 PM CDT | Tornado Warning | DVN | Mercer | 49 min |
Nearby
Tornado Warnings in Illinois, 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; radar from the NEXRAD Level II archive.