Alert archive / Iowa / Tornado Warnings in 2003
Tornado Warning 41, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Jul 20, 2003, 10:27 PM CDT for Benton County, Buchanan County, Linn County, Iowa. It was in force for 33 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
- Jul 20, 2003, 10:27 PM CDT (03:27 UTC)
- Expired
- Jul 20, 2003, 11:00 PM CDT
- In force
- 33 min
- Issued by
- NWS Quad Cities, IA
- Area
- Counties, with a storm outline in the text
Counties Benton County, IA, Buchanan County, IA, Linn County, IA
The radar
The Quad Cities radar (KDVN), 112 km from the middle of the area, began a volume at 03:11 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 |
|---|---|---|---|
| Jul 20, 8:30 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 3.5 hours before the alert went out and 117 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.
- Mixed-layer CAPE
- 3041 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 1003 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 123 m²/s²
- 0-3 km storm-relative helicity
- 251 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 9.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KDVN 210327 TORDVN IAC011-019-113-210400- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1027 PM CDT SUN JUL 20 2003 THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A * TORNADO WARNING FOR... NORTHEASTERN BENTON COUNTY IN EAST CENTRAL IOWA LINN COUNTY IN EAST CENTRAL IOWA SOUTHERN BUCHANAN COUNTY IN NORTHEAST IOWA * UNTIL 1100 PM CDT * AT 1022 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH A POSSIBLE TORNADO OVER URBANA...OR 10 MILES NORTHEAST OF VINTON...MOVING SOUTHEAST AT 35 MPH. * THE TORNADO IS EXPECTED TO BE NEAR... CENTER POINT BY 1030 PM CDT. LAFAYETTE BY 1040 PM CDT. ALBURNETT BY 1045 PM CDT. WHITTIER BY 1055 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 200 AM CDT MONDAY MORNING FOR EASTERN IOWA AND NORTHWEST ILLINOIS. LAT...LON 4235 9186 4219 9198 4188 9142 4214 9138 $$ DLF
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 9:59 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Buchanan, Linn | 31 min |
| Jul 20, 10:58 PM CDT | Tornado Warning | DVN | Linn | 32 min |
| Jul 20, 11:07 PM CDT | Tornado Warning | DVN | Cedar, Jones | 23 min |
| Jul 20, 11:29 PM CDT | Tornado Warning | DVN | Cedar, Linn | 31 min |
| Jul 20, 11:35 PM CDT | Tornado Warning | DVN | Jones | 25 min |
| Jul 20, 11:43 PM CDT | Severe Thunderstorm Warning | DVN | Iowa, Johnson, Keokuk, Washington | 47 min |
| Jul 20, 11:58 PM CDT | Severe Thunderstorm Warning | DVN | Louisa, Muscatine | 32 min |
| Jul 21, 12:17 AM CDT | Severe Thunderstorm Warning | DVN | Scott | 43 min |
| Jul 21, 12:30 AM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Henry, Jefferson, Louisa, Washington | 45 min |
Nearby
Tornado Warnings in Iowa, 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.