Alert archive / Illinois / Tornado Warnings in 2003

Tornado Warning 1, NWS Quad Cities, IA

March 31, 2003Mercer County, Illinois

NWS Quad Cities, IA issued this tornado warning at Mar 31, 2003, 6:01 PM CST for Mercer County, Illinois. It was in force for 59 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
Mar 31, 2003, 6:01 PM CST (00:01 UTC)
Expired
Mar 31, 2003, 7:00 PM CST
In force
59 min
Issued by
NWS Quad Cities, IA
Area
Counties, with a storm outline in the text

County Mercer County, IL

The radar

The Quad Cities radar (KDVN), 46 km from the middle of the area, began a volume at 00:04 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 00:00Z, 0.0 hours before the alert went out and 49 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 00:00Z on 2003-04-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 2003-04-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 496 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1806 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
496 m²/s²
0-3 km storm-relative helicity
912 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.

831 
WFUS53 KDVN 010001
TORDVN
ILC131-010100-

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

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  MERCER COUNTY IN NORTHWEST ILLINOIS

* UNTIL 800 PM CDT

* AT 658 PM CDT...DOPPLER RADAR AND SPOTTERS INDICATED A COUPLE
  TORNADOS...ONE WAS 2 MILES SOUTH OF VIOLA AND THE OTHER WAS 4
  MILES WEST OF VIOLA...MOVING EAST AT 20 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  GILCHRIST BY 700 PM CDT.
  VIOLA BY 705 PM CDT.
  6 MILES SOUTH OF BODEN BY 710 PM CDT.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT OR ON THE
LOWEST FLOOR OF A BUILDING IN AN INTERIOR HALLWAY OR ROOM.

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

LAT...LON 4126 9086 4110 9081 4109 9048 4133 9054

$$

SHEETS

Nearby

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