Alert archive / Iowa / Tornado Warnings in 2011
Tornado Warning 6, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at May 22, 2011, 3:22 PM CDT for Cedar County, Iowa County, Johnson County, Iowa. It was in force for 53 min. 5 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
- May 22, 2011, 3:22 PM CDT (20:22 UTC)
- Expired
- May 22, 2011, 4:15 PM CDT
- In force
- 53 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
Counties Cedar County, IA, Iowa County, IA, Johnson County, IA
The radar
The Quad Cities radar (KDVN), 77 km from the middle of the area, began a volume at 20:25 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 22, 3:36 PM CDT | TORNADO | 4 Sw North Liberty, IA | TORNADO ON THE GROUND ABOUT 4 MILES SOUTHWEST OF NORTH LIBERTY. |
| May 22, 3:42 PM CDT | HAIL 1 | 2 Nnw North Liberty, IA | |
| May 22, 3:45 PM CDT | FUNNEL CLOUD | Coralville, IA | OFFICERS REPORTED 2 FUNNEL CLOUDS. BOTH HAD BEGUN TO DISSIPATE. |
| May 22, 4:01 PM CDT | FUNNEL CLOUD | North Liberty, IA | STRONG RAPID ROTATION NEAR N. PENN AND I380 |
| May 22, 4:25 PM CDT | HAIL 0.75 | 2 Sw Iowa City, 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 |
|---|---|---|---|
| May 22, 12:51 PM CDT | Tornado Watch | SPC | 10 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 8.4 hours before the alert went out and 84 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1775 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 233 m²/s²
- 0-3 km storm-relative helicity
- 287 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
972 WFUS53 KDVN 222022 TORDVN IAC031-095-103-222115- /O.NEW.KDVN.TO.W.0006.110522T2022Z-110522T2115Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 322 PM CDT SUN MAY 22 2011 THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A * TORNADO WARNING FOR... WESTERN CEDAR COUNTY IN EAST CENTRAL IOWA... EAST CENTRAL IOWA COUNTY IN EAST CENTRAL IOWA... CENTRAL JOHNSON COUNTY IN EAST CENTRAL IOWA... * UNTIL 415 PM CDT. * AT 317 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO NEAR WINDHAM...OR 15 MILES SOUTHEAST OF MARENGO...MOVING EAST AT 35 MPH. * THE TORNADO WILL BE NEAR... COSGROVE...WINDHAM AND OXFORD AROUND 325 PM CDT... KENT COUNTY PARK AROUND 330 PM CDT... TIFFIN AROUND 335 PM CDT... CORALVILLE...OAKDALE AND NORTH LIBERTY AROUND 340 PM CDT... UNIVERSITY OF IOWA AND IOWA CITY AROUND 345 PM CDT... THIS INCLUDES INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 221 AND 264. THIS INCLUDES INTERSTATE 380 IN IOWA BETWEEN MILE MARKERS 1 AND 5. PRECAUTIONARY/PREPAREDNESS ACTIONS... HEAVY RAIN MAY OBSCURE THE APPROACH OF THE TORNADO. TAKE SHELTER NOW! THIS STORM HAS ALREADY PRODUCED A TORNADO AND REMAINS A THREAT. A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY EVENING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI. && LAT...LON 4187 9120 4161 9115 4157 9195 4169 9200 TIME...MOT...LOC 2022Z 261DEG 29KT 4166 9180 $$ ERVIN
4 follow-up statements
403 WWUS53 KDVN 222039 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 339 PM CDT SUN MAY 22 2011 IAC031-095-103-222115- /O.CON.KDVN.TO.W.0006.000000T0000Z-110522T2115Z/ JOHNSON IA-IOWA IA-CEDAR IA- 339 PM CDT SUN MAY 22 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM CDT FOR WESTERN CEDAR...EAST CENTRAL IOWA AND CENTRAL JOHNSON COUNTIES... AT 338 PM CDT...TRAINED SPOTTERS AND DOPPLER RADAR INDICATED A TORNADO 4 MILES SOUTHWEST OF NORTH LIBERTY...MOVING EAST AT 40 MPH. THE TORNADO WILL BE NEAR... NEWPORT AROUND 345 PM CDT... MORSE...ELMIRA AND OASIS AROUND 350 PM CDT... WEST BRANCH AROUND 355 PM CDT... CEDAR BLUFF...CEDAR VALLEY AND SPRINGDALE AROUND 400 PM CDT... BUCHANAN AROUND 405 PM CDT... THIS INCLUDES INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 221 AND 264. THIS INCLUDES INTERSTATE 380 BETWEEN MILE MARKERS 1 AND 5. PRECAUTIONARY/PREPAREDNESS ACTIONS... HEAVY RAIN MAY OBSCURE THE APPROACH OF THE TORNADO. TAKE SHELTER NOW! A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY EVENING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI. && LAT...LON 4187 9120 4161 9115 4157 9195 4169 9200 TIME...MOT...LOC 2039Z 259DEG 35KT 4172 9156 $$ ERVIN
545 WWUS53 KDVN 222047 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 347 PM CDT SUN MAY 22 2011 IAC031-095-103-222115- /O.CON.KDVN.TO.W.0006.000000T0000Z-110522T2115Z/ JOHNSON IA-IOWA IA-CEDAR IA- 347 PM CDT SUN MAY 22 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM CDT FOR WEST CENTRAL CEDAR...EAST CENTRAL IOWA AND NORTHERN JOHNSON COUNTIES... AT 342 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A TORNADO. THIS TORNADO WAS LOCATED APPROXIMATELY NEAR NORTH LIBERTY...OR NEAR UNIVERSITY OF IOWA...MOVING EAST AT 30 MPH. TRAINED SPOTTERS INDICATE A WALL CLOUD NEAR NORTH LIBERTY AT 342 PM. THE TORNADO WILL BE NEAR... NEWPORT AROUND 355 PM CDT... MORSE AND ELMIRA AROUND 400 PM CDT... OASIS AROUND 405 PM CDT... CEDAR BLUFF AROUND 410 PM CDT... BUCHANAN AND CEDAR VALLEY AROUND 415 PM CDT... THIS INCLUDES INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 225 AND 248. THIS INCLUDES INTERSTATE 380 BETWEEN MILE MARKERS 1 AND 5. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM HAS ALREADY PRODUCED A TORNADO AND REMAINS A THREAT. PLEASE REPORT ANY SEVERE WEATHER OR DAMAGE TO YOUR LOCAL LAW ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE. A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY EVENING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI. && LAT...LON 4187 9120 4169 9117 4165 9190 4171 9191 TIME...MOT...LOC 2047Z 257DEG 24KT 4173 9154 $$ ERVIN
716 WWUS53 KDVN 222101 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 401 PM CDT SUN MAY 22 2011 IAC095-222108- /O.CAN.KDVN.TO.W.0006.000000T0000Z-110522T2115Z/ IOWA IA- 401 PM CDT SUN MAY 22 2011 ...THE TORNADO WARNING FOR EAST CENTRAL IOWA COUNTY IS CANCELLED... THE SEVERE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING A TORNADO HAS MOVED OUT OF THE WARNED AREA. THEREFORE THE TORNADO WARNING HAS BEEN CANCELLED. HOWEVER...THIS STORM IS STILL CAPABLE OF PRODUCING A TORNADO OVER JOHNSON COUNTY. A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY EVENING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI. LAT...LON 4167 9172 4173 9175 4187 9120 4169 9117 TIME...MOT...LOC 2058Z 253DEG 20KT 4175 9148 $$ IAC031-103-222115- /O.CON.KDVN.TO.W.0006.000000T0000Z-110522T2115Z/ JOHNSON IA-CEDAR IA- 401 PM CDT SUN MAY 22 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM CDT FOR WEST CENTRAL CEDAR AND NORTHERN JOHNSON COUNTIES... AT 355 PM CDT...TRAINED SPOTTERED INDICATED A NARROW FUNNELCLOUD NEAR NORTH LIBERTY. THIS POSSIBLE TORNADO WAS LOCATED APPROXIMATELY NEAR NEWPORT...OR 6 MILES NORTH OF UNIVERSITY OF IOWA...MOVING EAST AT 25 MPH. THE TORNADO WILL BE NEAR... MORSE...ELMIRA AND OASIS AROUND 405 PM CDT... OASIS AROUND 410 PM CDT... CEDAR BLUFF...BUCHANAN AND CEDAR VALLEY AROUND 415 PM CDT... THIS INCLUDES INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 235 AND 247. THIS INCLUDES INTERSTATE 380 BETWEEN MILE MARKERS 1 AND 4. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM HAS ALREADY PRODUCED A TORNADO AND REMAINS A THREAT. A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY EVENING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI. && LAT...LON 4167 9172 4173 9175 4187 9120 4169 9117 TIME...MOT...LOC 2058Z 253DEG 20KT 4175 9148 $$ ERVIN
761 WWUS53 KDVN 222114 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 414 PM CDT SUN MAY 22 2011 IAC031-103-222123- /O.EXP.KDVN.TO.W.0006.000000T0000Z-110522T2115Z/ JOHNSON IA-CEDAR IA- 414 PM CDT SUN MAY 22 2011 ...THE TORNADO WARNING FOR WEST CENTRAL CEDAR AND NORTHERN JOHNSON COUNTIES WILL EXPIRE AT 415 PM CDT... THE SEVERE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING A TORNADO HAS WEAKENED. THEREFORE THE TORNADO WARNING HAS BEEN ALLOWED TO EXPIRE. LARGE REMAINS A VERY HIGH THREAT WITH THIS STORM OVER JONES AND CEDAR COUNTIES. A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY EVENING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI. LAT...LON 4167 9172 4173 9175 4187 9120 4169 9117 TIME...MOT...LOC 2113Z 253DEG 20KT 4177 9137 $$ ERVIN
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 10:09 PM CDT | Special Weather Statement | DVN | Iowa, Jefferson, Keokuk | 51 min |
| May 22, 2:01 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Iowa | 44 min |
| May 22, 2:06 PM CDT | Severe Thunderstorm Warning | DVN | Iowa, Keokuk, Washington | 54 min |
| May 22, 2:34 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Iowa, Linn | 33 min |
| May 22, 2:38 PM CDT | Tornado Warning | DVN | Benton, Iowa, Johnson, Keokuk, Linn | 67 min |
| May 22, 2:45 PM CDT | Tornado Warning | DVN | Benton, Iowa, Linn | 29 min |
| May 22, 3:25 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Iowa, Johnson, Jones, Linn | 65 min |
| May 22, 3:43 PM CDT | Severe Thunderstorm Warning | DVN | Iowa, Johnson, Keokuk, Washington | 47 min |
| May 22, 4:12 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Jackson, Jones | 63 min |
| May 22, 4:17 PM CDT | Severe Thunderstorm Warning | DVN | Jefferson, Keokuk, Washington | 43 min |
| May 22, 4:17 PM CDT | Severe Thunderstorm Warning | DVN | Iowa, Johnson, Keokuk, Washington | 43 min |
| May 22, 4:32 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Johnson | 58 min |
| May 22, 4:47 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Jackson | 58 min |
| May 22, 4:56 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Jackson, Scott | 64 min |
| May 22, 5:25 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Jackson, Muscatine, Scott | 50 min |
| May 22, 5:28 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Jackson | 62 min |
| May 22, 5:47 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Scott | 31 min |
Nearby
Tornado Warnings in Iowa, 2011Every tornado warning in 2011Tornadoes in 2011
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.