Alert archive / Illinois / Tornado Warnings in 2004

Tornado Warning 4, NWS Quad Cities, IA

May 10, 2004Bureau County, Putnam County, Illinois

NWS Quad Cities, IA issued this tornado warning at May 10, 2004, 4:46 PM CDT for Bureau County, Putnam County, Illinois. It was in force for 44 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 10, 2004, 4:46 PM CDT (21:46 UTC)
Expired
May 10, 2004, 5:30 PM CDT
In force
44 min
Issued by
NWS Quad Cities, IA
Area
Counties, with a storm outline in the text

Counties Bureau County, IL, Putnam County, IL

The radar

The Quad Cities radar (KDVN), 101 km from the middle of the area, began a volume at 21:45 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 nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.8 hours before the alert went out and 95 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-pSkew-T log-p diagram, Davenport, at 12:00Z on 2004-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 212 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2004-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 100 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
212 J/kg
Mixed-layer CIN
-77 J/kg
Mixed-layer LCL
1187 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
100 m²/s²
0-3 km storm-relative helicity
108 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KDVN 102146
TORDVN
ILC011-155-102230-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
446 PM CDT MON MAY 10 2004

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

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

* UNTIL 530 PM CDT

* AT 435 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS LIKELY TO PRODUCE A TORNADO ALONG A
  LINE EXTENDING FROM 9 MILES WEST OF LA MOILLE TO 9 MILES SOUTHWEST
  OF SHEFFIELD...OR ALONG A LINE EXTENDING FROM 13 MILES NORTH OF
  PRINCETON TO 6 MILES EAST OF KEWANEE...MOVING SOUTHEAST AT 20 MPH.

* TORNADO PRODUCING STORMS ARE EXPECTED TO BE NEAR...
  LA MOILLE AND PRINCETON BY 455 PM CDT
  TISKILWA BY 500 PM CDT
  LADD AND DEPUE BY 520 PM CDT
  SPRING VALLEY...HENNEPIN AND DALZELL BY 525 PM CDT
  GRANVILLE AND 6 MILES NORTHWEST OF MC NABB BY 530 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.

LAT...LON 4165 8941 4119 8993 4094 8941 4139 8890

$$

REA

The office that day

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

IssuedProductOfficeCountiesLasted
May 10, 4:38 PM CDTSevere Thunderstorm WarningDVNBureau, Putnam52 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.