Alert archive / Iowa / Tornado Warnings in 2007
Tornado Warning 27, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Oct 2, 2007, 7:22 PM CDT for Johnson County, Iowa. It was in force for 38 min. 2 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
- Oct 2, 2007, 7:22 PM CDT (00:22 UTC)
- Expired
- Oct 2, 2007, 8:00 PM CDT
- In force
- 38 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
County Johnson County, IA
The radar
The Quad Cities radar (KDVN), 81 km from the middle of the area, began a volume at 00:22 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 |
|---|---|---|---|
| Oct 2, 7:37 PM CDT | TSTM WND GST 29 | 3 Sw Iowa City, IA | PROVIDED BY IOWA DOT RWIS STATION AT IA HWY 218 / MELROSE AVE INTERCHANGE. |
| Oct 2, 7:40 PM CDT | TSTM WND GST 30 | 2 Ese Iowa City, IA | ALSO OBSERVED WALL CLOUD GO DIRECTLY OVER THEIR HOUSE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 0.4 hours before the alert went out and 88 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
- 318 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 873 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 294 m²/s²
- 0-3 km storm-relative helicity
- 521 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 4.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KDVN 030022 TORDVN IAC103-030100- /O.NEW.KDVN.TO.W.0027.071003T0022Z-071003T0100Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 722 PM CDT TUE OCT 2 2007 THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A * TORNADO WARNING FOR... JOHNSON COUNTY IN EAST CENTRAL IOWA... * UNTIL 800 PM CDT. * AT 718 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO 9 MILES SOUTH OF TIFFIN...OR ABOUT 12 MILES SOUTHWEST OF IOWA CITY...MOVING NORTHEAST AT 35 MPH. * THE TORNADO WILL BE NEAR... 6 MILES SOUTH OF CORALVILLE AROUND 730 PM CDT... IOWA CITY...UNIVERSITY HEIGHTS...HILLS AND 6 MILES SOUTH OF OAKDALE AROUND 740 PM CDT... THE SAFEST PLACE TO BE IN A TORNADO IS IN A BASEMENT OR INTERIOR ROOM OR HALLWAY ON THE LOWEST FLOOR OF A BUILDING. TORNADOES AT NIGHT ARE DIFFICULT TO SEE AND ARE ESPECIALLY DANGEROUS. LAT...LON 4182 9139 4153 9139 4153 9177 4166 9182 TIME...MOT...LOC 0022Z 252DEG 31KT 4158 9168 $$ 12
2 follow-up statements
000 WWUS53 KDVN 030037 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 737 PM CDT TUE OCT 2 2007 IAC103-030100- /O.CON.KDVN.TO.W.0027.000000T0000Z-071003T0100Z/ JOHNSON IA- 737 PM CDT TUE OCT 2 2007 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR JOHNSON COUNTY... AT 732 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A POSSIBLE TORNADO. THIS TORNADO WAS LOCATED APPROXIMATELY NEAR IOWA CITY MUNICIPAL AIRPORT...OR ABOUT NEAR IOWA CITY...MOVING EAST AT 40 MPH. THE TORNADO WILL BE NEAR... ELMIRA AND MORSE AROUND 745 PM CDT... TORNADOES AT NIGHT ARE DIFFICULT TO SEE AND ARE ESPECIALLY DANGEROUS. PLEASE REPORT ANY SEVERE WEATHER OR DAMAGE TO YOUR LOCAL LAW ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE. LAT...LON 4182 9139 4153 9139 4153 9177 4166 9182 TIME...MOT...LOC 0037Z 248DEG 37KT 4166 9149 $$ 12
000 WWUS53 KDVN 030054 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 752 PM CDT TUE OCT 2 2007 IAC103-030102- /O.EXP.KDVN.TO.W.0027.000000T0000Z-071003T0100Z/ JOHNSON IA- 752 PM CDT TUE OCT 2 2007 ...THE TORNADO WARNING FOR JOHNSON COUNTY THROUGH 800 PM CDT HAS BEEN CANCELLED... THE SEVERE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING A TORNADO HAS WEAKENED MOVED EAST OUT OF THE WARNED AREA. THEREFORE THE TORNADO WARNING HAS BEEN CANCELLED. LAT...LON 4182 9139 4153 9139 4153 9177 4166 9182 TIME...MOT...LOC 0052Z 248DEG 37KT 4172 9130 $$ 12
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 2, 7:58 PM CDT | Tornado Warning | DVN | Cedar, Clinton | 22 min |
Nearby
Tornado Warnings in Iowa, 2007Every tornado warning in 2007Tornadoes in 2007
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.