Alert archive / Illinois / Tornado Warnings in 2004
Tornado Warning 41, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Aug 18, 2004, 6:05 PM CDT for Henderson County, Illinois. It was in force for 40 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 18, 2004, 6:05 PM CDT (23:05 UTC)
- Expired
- Aug 18, 2004, 6:45 PM CDT
- In force
- 40 min
- Issued by
- NWS Quad Cities, IA
- Area
- Counties, with a storm outline in the text
County Henderson County, IL
The radar
The Quad Cities radar (KDVN), 87 km from the middle of the area, began a volume at 23:08 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 18, 6:42 PM CDT | TSTM WND GST 60 | Stronghurst, IL | |
| Aug 18, 6:42 PM CDT | HAIL 1 | Stronghurst, IL |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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 18, 5:35 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 11.1 hours before the alert went out and 90 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
- 3 J/kg
- Mixed-layer CIN
- -230 J/kg
- Mixed-layer LCL
- 1075 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 139 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KDVN 182305 TORDVN ILC071-182345- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 605 PM CDT WED AUG 18 2004 THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A * TORNADO WARNING FOR... HENDERSON COUNTY IN WEST CENTRAL ILLINOIS * UNTIL 645 PM CDT * AT 602 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM LIKELY TO PRODUCE A TORNADO 6 MILES WEST OF GLADSTONE...OR ABOUT OVER BURLINGTON...MOVING EAST AT 10 MPH. * THE TORNADO IS EXPECTED TO BE NEAR... GLADSTONE BY 625 PM CDT 6 MILES SOUTH OF OQUAWKA BY 630 PM CDT 8 MILES NORTH OF STRONGHURST BY 640 PM CDT BIGGSVILLE AND 6 MILES SOUTH OF ROZETTA BY 645 PM CDT THE SAFEST PLACE TO BE IN A TORNADO IS IN A BASEMENT OR INTERIOR ROOM OR HALLWAY ON THE LOWEST FLOOR OF A BUILDING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT WEDNESDAY EVENING FOR SOUTHEAST IOWA AND NORTHEAST MISSOURI. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1100 PM CDT WEDNESDAY EVENING FOR NORTHWESTERN ILLINOIS. LAT...LON 4095 9097 4075 9108 4074 9081 4100 9081 $$ MCCLURE
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 6:03 PM CDT | Severe Thunderstorm Warning | DVN | Warren | 57 min |
| Aug 18, 6:44 PM CDT | Tornado Warning | DVN | Henderson, Warren | 61 min |
Nearby
Tornado Warnings in Illinois, 2004Every tornado warning in 2004Tornadoes in 2004
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.