Alert archive / Iowa / Tornado Warnings in 2008
Tornado Warning 9, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Apr 10, 2008, 7:15 PM CDT for 6 counties in Iowa. It was in force for 45 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
- Apr 10, 2008, 7:15 PM CDT (00:15 UTC)
- Expired
- Apr 10, 2008, 8:00 PM CDT
- In force
- 45 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
Counties Benton County, IA, Iowa County, IA, Johnson County, IA, Keokuk County, IA, Linn County, IA, Washington County, IA
The radar
The Quad Cities radar (KDVN), 103 km from the middle of the area, began a volume at 00:16 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 |
|---|---|---|---|
| Apr 10, 4:55 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 0.3 hours before the alert went out and 110 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
- 325 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 466 m above ground
- 0-6 km bulk shear
- 106 kt
- 0-1 km storm-relative helicity
- 717 m²/s²
- 0-3 km storm-relative helicity
- 704 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KDVN 110015 TORDVN IAC011-095-103-107-113-183-110100- /O.NEW.KDVN.TO.W.0009.080411T0015Z-080411T0100Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 715 PM CDT THU APR 10 2008 THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN BENTON COUNTY IN EAST CENTRAL IOWA... EASTERN IOWA COUNTY IN EAST CENTRAL IOWA... NORTHWESTERN JOHNSON COUNTY IN EAST CENTRAL IOWA... SOUTHWESTERN LINN COUNTY IN EAST CENTRAL IOWA... NORTHEASTERN KEOKUK COUNTY IN SOUTHEAST IOWA... NORTHWESTERN WASHINGTON COUNTY IN SOUTHEAST IOWA... * UNTIL 800 PM CDT. * AT 712 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO NEAR KINROSS...OR 15 MILES NORTHWEST OF WASHINGTON...MOVING NORTH AT 45 MPH. * THE TORNADO WILL BE NEAR... OXFORD AROUND 740 PM CDT... AMANA AROUND 745 PM CDT... WALFORD...SWISHER AND 7 MILES WEST OF SHUEYVILLE AROUND 755 PM CDT... FAIRFAX AND CEDAR RAPIDS AROUND 800 PM CDT... THIS INCLUDES INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 225 AND 236. THIS INCLUDES INTERSTATE 380 IN IOWA BETWEEN MILE MARKERS 6 AND 20. THE SAFEST PLACE TO BE IN A TORNADO IS IN A BASEMENT OR INTERIOR ROOM OR HALLWAY ON THE LOWEST FLOOR OF A BUILDING. THIS STORM HAS ALREADY PRODUCED A TORNADO AND REMAINS A THREAT. A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING FOR SOUTHEAST IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI. LAT...LON 4199 9181 4198 9149 4138 9192 4148 9201 TIME...MOT...LOC 0015Z 193DEG 39KT 4146 9191 $$ MCCLURE
2 follow-up statements
000 WWUS53 KDVN 110031 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 730 PM CDT THU APR 10 2008 IAC107-183-110040- /O.CAN.KDVN.TO.W.0009.000000T0000Z-080411T0100Z/ WASHINGTON IA-KEOKUK IA- 730 PM CDT THU APR 10 2008 ...THE TORNADO WARNING FOR NORTHEASTERN KEOKUK AND NORTHWESTERN WASHINGTON COUNTIES IS CANCELLED... THE SEVERE THUNDERSTORM WITH A HISTORY OF TORNADOES HAS MOVED OUT OF THE WARNED AREA. THEREFORE THE TORNADO WARNING HAS BEEN CANCELLED. A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING FOR SOUTHEAST IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI. LAT...LON 4199 9181 4198 9149 4158 9183 4160 9192 TIME...MOT...LOC 0030Z 194DEG 37KT 4166 9187 $$ IAC011-095-103-113-110100- /O.CON.KDVN.TO.W.0009.000000T0000Z-080411T0100Z/ BENTON IA-LINN IA-IOWA IA-JOHNSON IA- 730 PM CDT THU APR 10 2008 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR NORTHWESTERN JOHNSON...NORTHEASTERN IOWA...SOUTHWESTERN LINN AND SOUTHEASTERN BENTON COUNTIES... AT 729 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A TORNADO. THIS TORNADO WAS LOCATED APPROXIMATELY 7 MILES SOUTHWEST OF OXFORD...OR 15 MILES SOUTHEAST OF MARENGO...MOVING NORTH AT 42 MPH. THE TORNADO WILL BE NEAR... HOMESTEAD...OXFORD AND KENT COUNTY PARK AROUND 740 PM CDT... EAST AMANA AND AMANA AIRPORT AROUND 745 PM CDT... WALFORD AND SWISHER AROUND 750 PM CDT... FAIRFAX AND CEDAR RAPIDS MUNICIPAL AIRPORT AROUND 755 PM CDT... CEDAR RAPIDS AROUND 800 PM CDT... THIS INCLUDES INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 226 AND 233. THIS INCLUDES INTERSTATE 380 BETWEEN MILE MARKERS 8 AND 20. 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. THIS STORM HAS ALREADY PRODUCED A TORNADO AND REMAINS A THREAT. A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING FOR SOUTHEAST IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI. LAT...LON 4199 9181 4198 9149 4158 9183 4160 9192 TIME...MOT...LOC 0030Z 194DEG 37KT 4166 9187 $$ MCCLURE
000 WWUS53 KDVN 110053 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 752 PM CDT THU APR 10 2008 IAC011-095-103-113-110102- /O.EXP.KDVN.TO.W.0009.000000T0000Z-080411T0100Z/ BENTON IA-LINN IA-IOWA IA-JOHNSON IA- 752 PM CDT THU APR 10 2008 ...THE TORNADO WARNING FOR NORTHWESTERN JOHNSON...NORTHEASTERN IOWA...SOUTHWESTERN LINN AND SOUTHEASTERN BENTON COUNTIES EXPIRES AT 800 PM CDT... THE SEVERE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING A TORNADO HAS WEAKENED. THEREFORE THE TORNADO WARNING HAS BEEN ALLOWED TO EXPIRE. A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING FOR SOUTHEAST IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI. LAT...LON 4199 9181 4198 9149 4158 9183 4160 9192 TIME...MOT...LOC 0052Z 194DEG 37KT 4188 9180 $$ MCCLURE
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 7:04 PM CDT | Tornado Warning | DVN | Benton, Iowa | 41 min |
| Apr 10, 8:23 PM CDT | Severe Thunderstorm Warning | DVN | Johnson, Louisa, Muscatine, Washington | 20 min |
| Apr 10, 11:01 PM CDT | River Flood Warning | DVN | Iowa, Johnson | 37 days |
| Apr 11, 3:42 AM CDT | River Flood Warning | DVN | Johnson, Washington | 42 hr |
| Apr 11, 5:12 AM CDT | River Flood Warning | DVN | Keokuk | 30 hr |
| Apr 11, 9:38 AM CDT | River Flood Warning | DVN | Cedar, Louisa, Muscatine | 26 days |
| Apr 11, 9:38 AM CDT | River Flood Warning | DVN | Louisa | 4 days |
| Apr 11, 9:51 AM CDT | River Flood Warning | DVN | Lee | 11 hr |
| Apr 11, 10:50 AM CDT | River Flood Warning | DVN | Muscatine, Scott | 72 hr |
| Apr 11, 10:50 AM CDT | River Flood Warning | DVN | Louisa, Muscatine | 72 hr |
| Apr 11, 10:50 AM CDT | River Flood Warning | DVN | Louisa, Muscatine | 38 days |
| Apr 11, 10:50 AM CDT | River Flood Warning | DVN | Des Moines, Louisa | 40 days |
| Apr 11, 10:50 AM CDT | River Flood Warning | DVN | Des Moines, Louisa | 40 days |
| Apr 11, 10:50 AM CDT | River Flood Warning | DVN | Lee | 49 hr |
Nearby
Tornado Warnings in Iowa, 2008Every tornado warning in 2008Tornadoes in 2008
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.