Alert archive / Iowa / Tornado Warnings in 2002
Tornado Warning 20, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Sep 18, 2002, 2:09 PM CDT for Jones County, Iowa. It was in force for 36 min. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 18, 2002, 2:09 PM CDT (19:09 UTC)
- Expired
- Sep 18, 2002, 2:45 PM CDT
- In force
- 36 min
- Issued by
- NWS Quad Cities, IA
- Area
- Counties, with a storm outline in the text
County Jones County, IA
The radar
The Quad Cities radar (KDVN), 66 km from the middle of the area, began a volume at 19:13 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 |
|---|---|---|---|
| Sep 18, 2:14 PM CDT | Thunderstorm Wind 61 E | Wyoming, IA | |
| Sep 18, 2:21 PM CDT | Hail 1 | Wyoming, IA | |
| Sep 18, 2:21 PM CDT | Thunderstorm Wind 61 E | Wyoming, IA | |
| Sep 18, 2:25 PM CDT | Hail 1.25 | Wyoming, IA |
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 nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 7.2 hours before the alert went out and 70 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
- 82 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 783 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 142 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
674 WFUS53 KDVN 181909 TORMLI IAC105-181945- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 209 PM CDT WED SEP 18 2002 THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN JONES COUNTY IN EAST CENTRAL IOWA * UNTIL 245 PM CDT * AT 208 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH A POSSIBLE TORNADO 4 MILES NORTHEAST OF OLIN...OR 10 MILES SOUTHEAST OF ANAMOSA...MOVING EAST AT 30 MPH. * THE TORNADO IS EXPECTED TO BE NEAR... WYOMING BY 215 PM CDT. 6 MILES NORTH OF OXFORD JUNCTION BY 220 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. LAT...LON 4211 9124 4194 9119 4197 9090 4220 9090 DLF
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 18, 1:55 PM CDT | Severe Thunderstorm Warning | DVN | Jones | 50 min |
| Sep 18, 2:29 PM CDT | Tornado Warning | DVN | Clinton, Jackson | 46 min |
| Sep 18, 3:17 PM CDT | Severe Thunderstorm Warning | DVN | Clinton | 43 min |
Nearby
Tornado Warnings in Iowa, 2002Every tornado warning in 2002Tornadoes in 2002
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.