Alert archive / Illinois / Tornado Warnings in 1998
Tornado Warning 41, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Jun 18, 1998, 6:30 PM CDT for Whiteside County, Illinois. It was in force for 20 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 18, 1998, 6:30 PM CDT (23:30 UTC)
- Expired
- Jun 18, 1998, 6:50 PM CDT
- In force
- 20 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties
County Whiteside County, IL
The radar
The Quad Cities radar (KDVN), 58 km from the middle of the area, began a volume at 23:32 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.
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 18, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 11.5 hours before the alert went out and 51 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
- 2000 J/kg
- Mixed-layer CIN
- -220 J/kg
- Mixed-layer LCL
- 1205 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 112 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
315 WFUS1 KMLI 182331 RRA TORMLI ILC195-182350- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 630 PM CDT THU JUN 18 1998 THE NATIONAL WEATHER SERVICE IN QUAD CITIES IA HAS ISSUED A * TORNADO WARNING FOR... EASTERN WHITESIDE COUNTY IN NORTHWESTERN ILLINOIS * UNTIL 650 PM CDT * AT 629 PM CDT... SPOTTERS REPORTED A TORNADO 25 MILES NORTHWEST OF PRINCETON OR 3 MILES SOUTH OF WHITESIDE COUNTY AIRPORT MOVING NORTHEAST AT 40 MPH. * THE TORNADO IS EXPECTED TO BE NEAR... WHITESIDE COUNTY AIRPORT AROUND 631 PM CDT YEOWARD ADDITION AROUND 633 PM CDT ROCK FALLS AROUND 633 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 WOLF
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 4:45 PM CDT | Severe Thunderstorm Warning | DVN | Jo Daviess | 75 min |
| Jun 18, 4:45 PM CDT | Severe Thunderstorm Warning | DVN | Rock Island | 75 min |
| Jun 18, 4:55 PM CDT | Severe Thunderstorm Warning | DVN | Hancock, Henderson | 65 min |
| Jun 18, 5:03 PM CDT | Severe Thunderstorm Warning | DVN | Mercer | 62 min |
| Jun 18, 5:23 PM CDT | Severe Thunderstorm Warning | DVN | Carroll, Whiteside | 77 min |
| Jun 18, 5:23 PM CDT | Severe Thunderstorm Warning | DVN | Henry | 77 min |
| Jun 18, 5:33 PM CDT | Severe Thunderstorm Warning | DVN | Warren | 67 min |
| Jun 18, 5:46 PM CDT | Severe Thunderstorm Warning | DVN | Stephenson | 64 min |
| Jun 18, 5:53 PM CDT | Tornado Warning | DVN | Henry | 32 min |
| Jun 18, 6:00 PM CDT | Severe Thunderstorm Warning | DVN | McDonough | 50 min |
| Jun 18, 6:12 PM CDT | Severe Thunderstorm Warning | DVN | Bureau | 63 min |
| Jun 18, 6:49 PM CDT | Severe Thunderstorm Warning | DVN | Stephenson | 21 min |
| Jun 18, 6:54 PM CDT | Severe Thunderstorm Warning | DVN | Putnam | 66 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.