Alert archive / Iowa / Tornado Warnings in 2007
Tornado Warning 23, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Jul 18, 2007, 7:06 PM CDT for Linn County, Iowa. It was in force for 39 min. 3 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
- Jul 18, 2007, 7:06 PM CDT (00:06 UTC)
- Expired
- Jul 18, 2007, 7:45 PM CDT
- In force
- 39 min
- Issued by
- NWS Quad Cities, IA
- Area
- Counties, with a storm outline in the text
County Linn County, IA
The radar
The Quad Cities radar (KDVN), 97 km from the middle of the area, began a volume at 00:07 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 |
|---|---|---|---|
| Jul 18, 7:07 PM CDT | FUNNEL CLOUD | Cedar Rapids, IA | |
| Jul 18, 7:07 PM CDT | TSTM WND GST 53 | Cedar Rapids, IA | |
| Jul 18, 7:20 PM CDT | TSTM WND GST 60 | Mount Vernon, IA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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 18, 5:35 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 0.1 hours before the alert went out and 102 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
- 3404 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 988 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KDVN 190005 TORDVN IAC113-190045- /O.NEW.KDVN.TO.W.0023.070719T0006Z-070719T0045Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 706 PM CDT WED JUL 18 2007 THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A * TORNADO WARNING FOR... LINN COUNTY IN EAST CENTRAL IOWA... * UNTIL 745 PM CDT. * AT 703 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO NEAR ROBINS...OR ABOUT 8 MILES NORTH OF CEDAR RAPIDS... MOVING SOUTHEAST AT 50 MPH. * THE TORNADO WILL BE NEAR... SPRINGVILLE...BERTRAM AND 7 MILES SOUTHWEST OF VIOLA AROUND 715 PM CDT... MOUNT VERNON AROUND 720 PM CDT... LISBON AROUND 725 PM CDT... THIS INCLUDES INTERSTATE 380 IN IOWA BETWEEN MILE MARKERS 15 AND 30. THE SAFEST PLACE TO BE IN A TORNADO IS IN A BASEMENT OR INTERIOR ROOM OR HALLWAY ON THE LOWEST FLOOR OF A BUILDING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT THURSDAY MORNING FOR EASTERN IOWA. LAT...LON 4220 9167 4190 9181 4187 9138 4213 9138 $$ MAYES
2 follow-up statements
000 WWUS53 KDVN 190020 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 719 PM CDT WED JUL 18 2007 IAC113-190045- /O.CON.KDVN.TO.W.0023.000000T0000Z-070719T0045Z/ LINN IA- 719 PM CDT WED JUL 18 2007 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR LINN COUNTY... AT 716 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A TORNADO. THIS TORNADO WAS LOCATED APPROXIMATELY NEAR MOUNT VERNON...OR ABOUT 11 MILES EAST OF CEDAR RAPIDS...MOVING SOUTHEAST AT 50 MPH. DAMAGING STRAIGHT-LINE WINDS ARE LIKELY IN ADDITION TO TORNADOES. THIS STORM HAS A HISTORY OF PRODUCING FUNNEL CLOUDS IN LINN COUNTY. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT THURSDAY MORNING FOR EASTERN IOWA. LAT...LON 4220 9167 4190 9181 4187 9138 4213 9138 $$ MAYES
000 WWUS53 KDVN 190043 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 743 PM CDT WED JUL 18 2007 IAC113-190053- /O.EXP.KDVN.TO.W.0023.000000T0000Z-070719T0045Z/ LINN IA- 743 PM CDT WED JUL 18 2007 ...THE TORNADO WARNING FOR LINN COUNTY EXPIRES AT 745 PM CDT... THE SEVERE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING A TORNADO HAS MOVED OUT OF THE WARNED AREA. THEREFORE THE TORNADO WARNING HAS BEEN ALLOWED TO EXPIRE. HOWEVER...THIS STORM IS STILL CAPABLE OF PRODUCING WIND GUSTS UP TO 50 MPH IN EASTERN LINN COUNTY. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT THURSDAY MORNING FOR EASTERN IOWA. LAT...LON 4220 9167 4190 9181 4187 9138 4213 9138 $$ MAYES
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 7:12 PM CDT | Severe Thunderstorm Warning | DVN | Johnson | 63 min |
| Jul 18, 7:15 PM CDT | Tornado Warning | DVN | Johnson | 45 min |
| Jul 18, 7:25 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Jones | 65 min |
| Jul 18, 7:35 PM CDT | Tornado Warning | DVN | Jones | 40 min |
| Jul 18, 7:52 PM CDT | Severe Thunderstorm Warning | DVN | Clinton | 53 min |
| Jul 18, 8:06 PM CDT | Severe Thunderstorm Warning | DVN | Scott | 39 min |
| Jul 18, 8:12 PM CDT | Flash Flood Warning | DVN | Jackson | 6 hr |
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.