Alert archive / Illinois / Tornado Warnings in 2004

Tornado Warning 27, NWS Quad Cities, IA

May 30, 2004Bureau County, Whiteside County, Illinois

NWS Quad Cities, IA issued this tornado warning at May 30, 2004, 4:54 PM CDT for Bureau County, Whiteside County, Illinois. It was in force for 51 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, 4:54 PM CDT (21:54 UTC)
Expired: May 30, 2004, 5:45 PM CDT
In force: 51 min
Issued by: NWS Quad Cities, IA
Area: Counties, with a storm outline in the text

Counties Bureau County, IL, Whiteside County, IL

The radar

The Quad Cities radar (KDVN), 70 km from the middle of the area, began a volume at 21:54 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, 12:25 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.9 hours before the alert went out and 183 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.

361 
WFUS53 KDVN 302154
TORDVN
ILC011-195-302245-

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

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN BUREAU COUNTY IN NORTH CENTRAL ILLINOIS
  SOUTHEASTERN WHITESIDE COUNTY IN NORTHWEST ILLINOIS

* UNTIL 545 PM CDT

* AT 449 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM LIKELY TO PRODUCE A TORNADO 7 MILES SOUTH OF
  TAMPICO...OR ABOUT 18 MILES SOUTHWEST OF ROCK FALLS...MOVING
  NORTHEAST AT 35 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  DEER GROVE BY 500 PM CDT
  6 MILES NORTHWEST OF WALNUT BY 505 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 TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM CDT SUNDAY EVENING FOR
EASTERN IOWA AND NORTHWESTERN ILLINOIS. A TORNADO WATCH ALSO REMAINS
IN EFFECT UNTIL 1000 PM CDT SUNDAY EVENING FOR NORTHWEST ILLINOIS.

LAT...LON 4145 8983 4149 8986 4160 8988 4175 8964
          4158 8963 4157 8953

$$

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, 4:03 PM CDT	Tornado Warning	DVN	McDonough, Warren	27 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, 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.