Alert archive / Iowa / Tornado Warnings in 2011
Tornado Warning 5, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at May 22, 2011, 2:45 PM CDT for Benton County, Iowa County, Linn County, Iowa. It was in force for 29 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
- May 22, 2011, 2:45 PM CDT (19:45 UTC)
- Expired
- May 22, 2011, 3:14 PM CDT
- In force
- 29 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
Counties Benton County, IA, Iowa County, IA, Linn County, IA
The radar
The Quad Cities radar (KDVN), 128 km from the middle of the area, began a volume at 19:47 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 |
|---|---|---|---|
| May 22, 12:51 PM CDT | Tornado Watch | SPC | 10 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 7.8 hours before the alert went out and 134 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.
300
WFUS53 KDVN 221945
TORDVN
IAC011-095-113-222030-
/O.NEW.KDVN.TO.W.0005.110522T1945Z-110522T2030Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
245 PM CDT SUN MAY 22 2011
THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHERN BENTON COUNTY IN EAST CENTRAL IOWA...
NORTHWESTERN IOWA COUNTY IN EAST CENTRAL IOWA...
WEST CENTRAL LINN COUNTY IN EAST CENTRAL IOWA...
* UNTIL 330 PM CDT.
* AT 243 PM CDT...TRAINED SPOTTERS REPORTED A TORNADO NEAR LADORA...
OR 7 MILES NORTHWEST OF MARENGO...MOVING NORTHEAST AT 30 MPH.
* THE TORNADO WILL BE NEAR...
BLAIRSTOWN AROUND 255 PM CDT...
WATKINS AND VAN HORNE AROUND 300 PM CDT...
NORWAY AROUND 305 PM CDT...
NEWHALL AROUND 310 PM CDT...
ATKINS AROUND 320 PM CDT...
PALO AND SHELLSBURG AROUND 325 PM CDT...
THIS INCLUDES INTERSTATE 380 IN IOWA BETWEEN MILE MARKERS 22 AND 32.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY EVENING FOR
EASTERN IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI.
&&
LAT...LON 4195 9222 4218 9184 4205 9153 4170 9230
4170 9231
TIME...MOT...LOC 1946Z 236DEG 28KT 4187 9214
$$
ERVIN3 follow-up statements
299 WWUS53 KDVN 221952 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 252 PM CDT SUN MAY 22 2011 IAC011-095-113-222030- /O.CON.KDVN.TO.W.0005.000000T0000Z-110522T2030Z/ LINN IA-IOWA IA-BENTON IA- 252 PM CDT SUN MAY 22 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 330 PM CDT FOR SOUTHEASTERN BENTON...NORTH CENTRAL IOWA AND WEST CENTRAL LINN COUNTIES... AT 247 PM CDT...TRAINED SPOTTERS REPORTED A TORNADO. THIS TORNADO WAS LOCATED APPROXIMATELY NEAR BLAIRSTOWN...OR NEAR MARENGO...MOVING NORTHEAST AT 30 MPH. THE TORNADO WILL BE NEAR... WATKINS AROUND 300 PM CDT... NORWAY AROUND 305 PM CDT... NEWHALL AROUND 310 PM CDT... ATKINS AROUND 315 PM CDT... PALO AND SHELLSBURG AROUND 325 PM CDT... HIAWATHA...TODDVILLE...ROBINS AND MIDWAY AROUND 330 PM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM HAS ALREADY PRODUCED A TORNADO AND REMAINS A THREAT. THIS STORM IS ALSO CAPABLE OF PRODUCING LARGE HAIL THE SIZE OF QUARTERS. A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY EVENING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI. && LAT...LON 4195 9219 4216 9184 4205 9153 4174 9222 TIME...MOT...LOC 1952Z 236DEG 28KT 4188 9207 $$ ERVIN
426 WWUS53 KDVN 221959 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 259 PM CDT SUN MAY 22 2011 IAC011-095-113-222030- /O.CON.KDVN.TO.W.0005.000000T0000Z-110522T2030Z/ LINN IA-IOWA IA-BENTON IA- 259 PM CDT SUN MAY 22 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 330 PM CDT FOR SOUTHEASTERN BENTON...NORTH CENTRAL IOWA AND WEST CENTRAL LINN COUNTIES... AT 251 PM CDT...TRAINED SPOTTERS REPORTED A TORNADO. THIS TORNADO WAS LOCATED APPROXIMATELY NEAR WATKINS...OR 7 MILES NORTH OF MARENGO...MOVING NORTHEAST AT 30 MPH. THE TORNADO WILL BE NEAR... NORWAY AROUND 305 PM CDT... NEWHALL AROUND 310 PM CDT... ATKINS AROUND 315 PM CDT... HIAWATHA AND 8 MILES WEST OF MARION AROUND 330 PM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM IS ALSO CAPABLE OF PRODUCING LARGE HAIL THE SIZE OF QUARTERS. A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY EVENING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI. && LAT...LON 4194 9212 4206 9183 4205 9153 4174 9222 TIME...MOT...LOC 1959Z 236DEG 28KT 4191 9201 $$ ERVIN
439 WWUS53 KDVN 222014 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 314 PM CDT SUN MAY 22 2011 IAC011-095-113-222024- /O.CAN.KDVN.TO.W.0005.000000T0000Z-110522T2030Z/ LINN IA-IOWA IA-BENTON IA- 314 PM CDT SUN MAY 22 2011 ...THE TORNADO WARNING FOR SOUTHEASTERN BENTON...NORTH CENTRAL IOWA AND WEST CENTRAL LINN COUNTIES IS CANCELLED... THE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING TORNADO HAS WEAKENED. THEREFORE THE TORNADO WARNING HAS BEEN CANCELLED. HOWEVER...THIS STORM IS STILL CAPABLE OF PRODUCING BREIF HEAVY RAIN A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY EVENING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI. LAT...LON 4194 9212 4206 9183 4205 9153 4174 9222 TIME...MOT...LOC 2014Z 236DEG 28KT 4197 9188 $$ 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, 3:22 PM CDT | Tornado Warning | DVN | Cedar, Iowa, Johnson | 53 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.