Alert archive / Iowa / Tornado Warnings in 2003

Tornado Warning 20, NWS Quad Cities, IA

May 10, 2003Lee County, Iowa

NWS Quad Cities, IA issued this tornado warning at May 10, 2003, 6:33 PM CDT for Lee County, Iowa. It was in force for 27 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, 2003, 6:33 PM CDT (23:33 UTC)
Expired: May 10, 2003, 7:00 PM CDT
In force: 27 min
Issued by: NWS Quad Cities, IA
Area: Counties, with a storm outline in the text

County Lee County, IA

The radar

The Quad Cities radar (KDVN), 142 km from the middle of the area, began a volume at 23:37 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 10, 3:50 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.6 hours before the alert went out and 147 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1102 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 139 m²/s²
0-3 km storm-relative helicity: 225 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

527 
WFUS53 KDVN 102333
TORDVN
IAC111-110000-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
633 PM CDT SAT MAY 10 2003

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  LEE COUNTY IN SOUTHEAST IOWA

* UNTIL 700 PM CDT

* AT 632 PM CDT...DOPPLER RADAR AND SPOTTERS INDICATED A POSSIBLE
  TORNADO 2 MILES SOUTHEAST OF ARGYLE...OR 10 MILES NORTHWEST OF
  KEOKUK...MOVING NORTHEAST AT 20 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
   NEW BOSTON BY 640 PM CDT.
  8 MILES SOUTHEAST OF DONNELLSON BY 645 PM CDT.
  7 MILES SOUTHEAST OF FRANKLIN BY 650 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT SATURDAY EVENING
FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI. A
TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL 1100 PM CDT SATURDAY
EVENING FOR WEST CENTRAL ILLINOIS AND NORTHEAST MISSOURI. A TORNADO
WATCH ALSO REMAINS IN EFFECT UNTIL 700 PM CDT SATURDAY EVENING FOR
NORTHEAST MISSOURI.

LAT...LON 4056 9165 4040 9153 4050 9141 4078 9147

$$

NICHOLS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 11:05 PM CDT	Severe Thunderstorm Warning	DVN	Lee	40 min
May 10, 4:57 PM CDT	Severe Thunderstorm Warning	DVN	Benton	48 min
May 10, 5:34 PM CDT	Tornado Warning	DVN	Benton, Buchanan	26 min
May 10, 5:35 PM CDT	Severe Thunderstorm Warning	DVN	Iowa, Keokuk, Washington	10 min
May 10, 5:48 PM CDT	Severe Thunderstorm Warning	DVN	Iowa, Johnson, Keokuk	42 min
May 10, 5:57 PM CDT	Severe Thunderstorm Warning	DVN	Delaware, Linn	48 min
May 10, 6:13 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan	47 min
May 10, 6:30 PM CDT	Tornado Warning	DVN	Jefferson	30 min
May 10, 6:44 PM CDT	Severe Thunderstorm Warning	DVN	Delaware, Linn	46 min
May 10, 6:51 PM CDT	Tornado Warning	DVN	Van Buren	39 min

Nearby

Tornado Warnings in Iowa, 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.