Alert archive / Illinois / Tornado Warnings in 2004

Tornado Warning 23, NWS Quad Cities, IA

May 30, 2004McDonough County, Warren County, Illinois

NWS Quad Cities, IA issued this tornado warning at May 30, 2004, 4:03 PM CDT for McDonough County, Warren County, Illinois. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 30, 2004, 4:03 PM CDT (21:03 UTC)
Expired: May 30, 2004, 4:30 PM CDT
In force: 27 min
Issued by: NWS Quad Cities, IA
Area: Counties, with a storm outline in the text

Counties McDonough County, IL, Warren County, IL

The radar

The Quad Cities radar (KDVN), 110 km from the middle of the area, began a volume at 21:02 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
May 30, 10:50 AM CDT	Tornado Watch	SPC	8 hr
May 30, 12:25 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.1 hours before the alert went out and 179 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1629 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 569 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 201 m²/s²
0-3 km storm-relative helicity: 177 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 8.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS53 KDVN 302103
TORDVN
ILC109-187-302130-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
403 PM CDT SUN MAY 30 2004

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
   MCDONOUGH COUNTY IN WEST CENTRAL ILLINOIS 
   WARREN COUNTY IN WEST CENTRAL ILLINOIS

* UNTIL 430 PM CDT

* AT 357 PM CDT...THE PUBLIC REPORTED A TORNADO NEAR GOOD HOPE...OR
  ABOUT 4 MILES NORTHEAST OF MACOMB...MOVING NORTHEAST AT 25 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  BUSHNELL BY 415 PM CDT
  PRAIRIE CITY AND PRAIRIE CITY AIRPORT BY 425 PM CDT

THIS TORNADO IS CAPABLE OF PRODUCING SIGNIFICANT STRUCTURAL DAMAGE TO
BUILDINGS. MOVE TO A SUBSTANTIAL SHELTER NOW

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM CDT SUNDAY EVENING FOR
WEST CENTRAL ILLINOIS AND NORTHEAST MISSOURI. A TORNADO WATCH ALSO
REMAINS IN EFFECT UNTIL 700 PM CDT SUNDAY EVENING FOR EASTERN IOWA
AND NORTHWESTERN ILLINOIS.

LAT...LON 4055 9079 4043 9063 4071 9033 4089 9053

$$

DLF

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 30, 7:27 AM CDT	Severe Thunderstorm Warning	DVN	Hancock, McDonough	78 min
May 30, 7:33 AM CDT	Severe Thunderstorm Warning	DVN	Henry	57 min
May 30, 7:53 AM CDT	Flash Flood Warning	DVN	Bureau, Henry, Mercer, Rock Island, Whiteside	6 hr
May 30, 8:58 AM CDT	Severe Thunderstorm Warning	DVN	Bureau	62 min
May 30, 10:01 AM CDT	Flash Flood Warning	DVN	Putnam	4 hr
May 30, 2:18 PM CDT	Severe Thunderstorm Warning	DVN	Hancock	42 min
May 30, 2:29 PM CDT	Tornado Warning	DVN	Hancock	46 min
May 30, 2:45 PM CDT	Tornado Warning	DVN	Henderson	45 min
May 30, 3:11 PM CDT	Tornado Warning	DVN	Hancock, McDonough, Warren	49 min
May 30, 3:57 PM CDT	Severe Thunderstorm Warning	DVN	Henry	48 min
May 30, 4:48 PM CDT	Severe Thunderstorm Warning	DVN	Bureau, Putnam	57 min
May 30, 4:51 PM CDT	Flash Flood Warning	DVN	Bureau, Henry, Putnam	54 min
May 30, 4:51 PM CDT	Flash Flood Warning	DVN	Bureau, Henry, Putnam	3 hr
May 30, 4:54 PM CDT	Tornado Warning	DVN	Bureau, Whiteside	51 min
May 30, 5:02 PM CDT	Flash Flood Warning	DVN	McDonough	3 hr

Nearby

Tornado Warnings in Illinois, 2004 Every tornado warning in 2004 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.