Alert archive / Illinois / Tornado Warnings in 1998
Tornado Warning 64, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Aug 24, 1998, 11:23 PM CDT for Carroll County, Whiteside County, Illinois. It was in force for 62 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
- Aug 24, 1998, 11:23 PM CDT (04:23 UTC)
- Expired
- Aug 25, 1998, 12:25 AM CDT
- In force
- 62 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties
Counties Carroll County, IL, Whiteside County, IL
The radar
The Quad Cities radar (KDVN), 64 km from the middle of the area, began a volume at 04:23 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 |
|---|---|---|---|
| Aug 24, 11:23 PM CDT | Thunderstorm Wind 56 | Central Portion, IL | Numerous trees and branches were downed by strong thunderstorm winds at Palisades State Park north of Savanah and at the Timberlake campground near Mount Carroll. |
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 |
|---|---|---|---|
| Aug 24, 10:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 4.4 hours before the alert went out and 58 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
- 48 J/kg
- Mixed-layer CIN
- -493 J/kg
- Mixed-layer LCL
- 2109 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 276 m²/s²
- 0-3 km storm-relative helicity
- 441 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
524 WFUS1 KMLI 250424 RRA TORMLI ILC015-195-250525- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1123 PM CDT MON AUG 24 1998 THE NATIONAL WEATHER SERVICE IN QUAD CITIES IA HAS ISSUED A * TORNADO WARNING FOR... CARROLL COUNTY IN NORTHWESTERN ILLINOIS WHITESIDE COUNTY IN NORTHWESTERN ILLINOIS * UNTIL 1225 AM CDT * AT 1122 PM CDT... DOPPLER RADAR INDICATED A TORNADO 7 MILES NORTH OF CLINTON MOVING SOUTHEAST AT 45 MPH. * THE TORNADO IS EXPECTED TO BE NEAR... ARGO FAY AROUND 1130 PM CDT UNION GROVE AROUND 1135 PM CDT MORRISON AROUND 1140 PM CDT STERLING AROUND 1155 PM CDT ROCK FALLS AROUND MIDNIGHT CDT GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR MEYER
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.