Alert archive / Illinois / Tornado Warnings in 2003

Tornado Warning 11, NWS Quad Cities, IA

April 30, 2003Bureau County, Illinois

NWS Quad Cities, IA issued this tornado warning at Apr 30, 2003, 8:44 PM CDT for Bureau County, Illinois. It was in force for 61 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, 8:44 PM CDT (01:44 UTC)
Expired: Apr 30, 2003, 9:45 PM CDT
In force: 61 min
Issued by: NWS Quad Cities, IA
Area: Counties, with a storm outline in the text

County Bureau County, IL

The radar

The Quad Cities radar (KDVN), 91 km from the middle of the area, began a volume at 01:46 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, 1.7 hours before the alert went out and 85 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.

029 
WFUS53 KDVN 010144
TORDVN
.ILC011-010245-

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

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  BUREAU COUNTY IN NORTH CENTRAL ILLINOIS

* UNTIL 945 PM CDT

* AT 841 PM CDT...DOPPLER RADAR AND SPOTTERS INDICATED A POSSIBLE
  TORNADO 6 MILES WEST OF NEPONSET...OR 4 MILES NORTHEAST OF
  KEWANEE...MOVING NORTHEAST AT 25 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE ARLINGTON...BUDA...BUREAU...
  CHERRY...COAL HOLLOW...DOVER...HOLLOWAYVILLE...JOHNSON SAUK TRAIL
  S. P....KASBEER...LA MOILLE...LADD...MALDEN...MANLIUS...MINERAL...
  OTTVILLE...PROVIDENCE...SEATONVILLE...SHEFFIELD...TISKILWA...VAN
  ORIN...WYANET AND ZEARING

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

DAMAGING WINDS AND LARGE HAIL ARE ALSO LIKELY WITH THIS DANGEROUS
STORM

LAT...LON 4147 8986 4124 8986 4125 8937 4133 8934
          4134 8919 4159 8921

$$

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, 8:22 PM CDT	Tornado Warning	DVN	Henry	38 min
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, 8:55 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.