Alert archive / Iowa / Tornado Warnings in 2001
Tornado Warning 17, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at May 10, 2001, 7:28 PM CDT for Johnson County, Linn County, Iowa. It was in force for 62 min. 4 reports came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- May 10, 2001, 7:28 PM CDT (00:28 UTC)
- Expired
- May 10, 2001, 8:30 PM CDT
- In force
- 62 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Johnson County, IA, Linn County, IA
The radar
The Quad Cities radar (KDVN), 98 km from the middle of the area, began a volume at 00:31 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 10, 7:35 PM CDT | Thunderstorm Wind 52 EG | Palo, IA | Grain silos and a cabin were damaged. Reported by trained storm spotters. |
| May 10, 7:45 PM CDT | Hail 0.75 | Ladora, IA | Penny sized hail reported by trained storm spotter. |
| May 10, 7:57 PM CDT | Funnel Cloud | Tiffin, IA | Reported by public. |
| May 10, 8:25 PM CDT | Hail 1.75 | Lost Nation, IA | Golfball sized hail reported by law enforcement. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
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, 4:15 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 0.5 hours before the alert went out and 103 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
- 794 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 1445 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 142 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.4
The text
As transmitted, in the capitals the NWS used until 2016.
934 WFUS53 KDVN 110029 TORMLI IAC103-113-110130- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 728 PM CDT THU MAY 10 2001 THE NATIONAL WEATHER SERVICE IN QUAD CITIES HAS ISSUED A * TORNADO WARNING FOR... JOHNSON COUNTY IN EAST CENTRAL IOWA LINN COUNTY IN EAST CENTRAL IOWA * UNTIL 830 PM CDT * AT 725 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF TORNADIC THUNDERSTORMS EXTENDING FROM 15 MILES WEST OF OXFORD TO 4 MILES NORTH OF MOUNT VERNON...OR ALONG A LINE EXTENDING FROM MARENGO TO 4 MILES NORTH OF MOUNT VERNON...MOVING SOUTHEAST AT 40 MPH. FUNNEL CLOUDS AND LARGE HAIL HAVE BEEN REPORTED IN CEDAR RAPIDS. * THE TORNADO IS EXPECTED TO BE NEAR... SWISHER BY 730 PM CDT. ELY BY 735 PM CDT. NORTH LIBERTY BY 745 PM CDT. TIFFIN BY 750 PM CDT. THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS. REPORT ANY SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE. LAT...LON 4229 9182 4153 9182 4153 9139 4229 9138 JAZ
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 7:11 PM CDT | Tornado Warning | DVN | Jones | 64 min |
| May 10, 7:15 PM CDT | Severe Thunderstorm Warning | DVN | Iowa | 60 min |
| May 10, 7:48 PM CDT | Tornado Warning | DVN | Cedar | 42 min |
| May 10, 8:02 PM CDT | Tornado Warning | DVN | Clinton, Jackson | 58 min |
| May 10, 8:11 PM CDT | Tornado Warning | DVN | Jones | 34 min |
| May 10, 8:27 PM CDT | Tornado Warning | DVN | Muscatine | 63 min |
| May 10, 8:28 PM CDT | Tornado Warning | DVN | Cedar | 62 min |
| May 10, 8:33 PM CDT | Severe Thunderstorm Warning | DVN | Johnson | 27 min |
| May 10, 8:39 PM CDT | Tornado Warning | DVN | Scott | 66 min |
| May 10, 8:40 PM CDT | Severe Thunderstorm Warning | DVN | Keokuk | 50 min |
| May 10, 8:58 PM CDT | Tornado Warning | DVN | Clinton | 47 min |
Nearby
Tornado Warnings in Iowa, 2001Every tornado warning in 2001Tornadoes in 2001
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.