Alert archive / Illinois / Tornado Warnings in 2003

Tornado Warning 10, NWS Quad Cities, IA

April 30, 2003Henry County, Illinois

NWS Quad Cities, IA issued this tornado warning at Apr 30, 2003, 8:22 PM CDT for Henry County, Illinois. It was in force for 38 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: Apr 30, 2003, 8:22 PM CDT (01:22 UTC)
Expired: Apr 30, 2003, 9:00 PM CDT
In force: 38 min
Issued by: NWS Quad Cities, IA
Area: Counties, with a storm outline in the text

County Henry County, IL

The radar

The Quad Cities radar (KDVN), 56 km from the middle of the area, began a volume at 01:25 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
Apr 30, 5:50 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.4 hours before the alert went out and 52 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: 1022 J/kg
Mixed-layer CIN: -104 J/kg
Mixed-layer LCL: 839 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 457 m²/s²
0-3 km storm-relative helicity: 611 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 12.6

Open this sounding in Storm Lab

The text

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

343 
WFUS53 KDVN 010122
TORDVN
ILC073-010200-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
820 PM CDT WED APR 30 2003

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN HENRY COUNTY IN NORTHWEST ILLINOIS

* UNTIL 900 PM CDT

* AT 815 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH A POSSIBLE TORNADO 3 MILES SOUTH OF GERMAN
  CORNER...OR 7 MILES WEST OF KEWANEE...MOVING NORTHEAST AT 20 MPH. 
  ANOTHER POSSIBLY TORNADIC STORM IS STRADDLING THE HENRY-KNOX   
  COUNTY BORDER NEAR NEKOMA.  IT IS MOVING EAST AT 20 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE ANNAWAN...BISHOP HILL...  
BRANDENBURG CORNERS...KEWANEE...NEKOMA...GALVA AND ULAH.

NIGHTTIME TORNADOES ARE ESPECIALLY DANGEROUS BECAUSE THEY ARE
DIFFICULT TO SEE. TAKE COVER NOW

.LAT...LON 4130 9022 4116 9022 4117 8988 4140 8989

$$

WOLF

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 7:20 PM CDT	Tornado Warning	DVN	Henry	55 min
Apr 30, 8:00 PM CDT	Flash Flood Warning	DVN	Mercer	5 hr
Apr 30, 8:25 PM CDT	Severe Thunderstorm Warning	DVN	Rock Island	50 min
Apr 30, 8:36 PM CDT	Severe Thunderstorm Warning	DVN	Mercer	39 min
Apr 30, 8:44 PM CDT	Tornado Warning	DVN	Bureau	61 min
Apr 30, 8:55 PM CDT	Tornado Warning	DVN	Bureau	50 min
Apr 30, 9:02 PM CDT	Severe Thunderstorm Warning	DVN	Henry	58 min
Apr 30, 9:24 PM CDT	Flash Flood Warning	DVN	Henry	5 hr
Apr 30, 9:37 PM CDT	Tornado Warning	DVN	Putnam	38 min
Apr 30, 9:42 PM CDT	Severe Thunderstorm Warning	DVN	Henderson	48 min
Apr 30, 9:48 PM CDT	Tornado Warning	DVN	Bureau	57 min
Apr 30, 10:02 PM CDT	Severe Thunderstorm Warning	DVN	Warren	43 min
Apr 30, 10:15 PM CDT	Tornado Warning	DVN	Putnam	45 min

Nearby

Tornado Warnings in Illinois, 2003 Every tornado warning in 2003 Tornadoes in 2003

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.