Alert archive / Iowa / Tornado Warnings in 2011
Tornado Warning 11, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Jun 8, 2011, 7:53 PM CDT for Jones County, Linn County, Iowa. It was in force for 37 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
- Jun 8, 2011, 7:53 PM CDT (00:53 UTC)
- Expired
- Jun 8, 2011, 8:30 PM CDT
- In force
- 37 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
Counties Jones County, IA, Linn County, IA
The radar
The Quad Cities radar (KDVN), 87 km from the middle of the area, began a volume at 00:54 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 |
|---|---|---|---|
| Jun 8, 8:11 PM CDT | TSTM WND GST 60 | Anamosa, IA | IOWA DOT REPORT |
| Jun 8, 8:14 PM CDT | TSTM WND GST 50 | 1 Ese Anamosa, IA | |
| Jun 8, 8:14 PM CDT | HAIL 0.88 | 1 Ese Anamosa, 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 |
|---|---|---|---|
| Jun 8, 4:49 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 0.9 hours before the alert went out and 91 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
- 2717 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 1625 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 119 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.9
The text
As transmitted, in the capitals the NWS used until 2016.
716 WFUS53 KDVN 090053 TORDVN IAC105-113-090130- /O.NEW.KDVN.TO.W.0011.110609T0053Z-110609T0130Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 753 PM CDT WED JUN 8 2011 THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A * TORNADO WARNING FOR... WEST CENTRAL JONES COUNTY IN EAST CENTRAL IOWA... EAST CENTRAL LINN COUNTY IN EAST CENTRAL IOWA... * UNTIL 830 PM CDT. * AT 750 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO NEAR WAUBEEK...OR 12 MILES WEST OF ANAMOSA...MOVING EAST AT 50 MPH. * THE TORNADO WILL BE NEAR... STONE CITY AND FAIRVIEW AROUND 800 PM CDT... ANAMOSA AND WAPSIPINICON STATE PARK AROUND 805 PM CDT... 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 SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT WEDNESDAY EVENING FOR EASTERN IOWA AND NORTHWEST ILLINOIS. && LAT...LON 4217 9125 4206 9126 4212 9151 4218 9151 TIME...MOT...LOC 0053Z 278DEG 42KT 4214 9146 $$
3 follow-up statements
411 WWUS53 KDVN 090105 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 805 PM CDT WED JUN 8 2011 IAC105-113-090130- /O.CON.KDVN.TO.W.0011.000000T0000Z-110609T0130Z/ LINN IA-JONES IA- 805 PM CDT WED JUN 8 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR WEST CENTRAL JONES AND EAST CENTRAL LINN COUNTIES... AT 802 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A TORNADO. THIS TORNADO WAS LOCATED APPROXIMATELY NEAR STONE CITY...OR NEAR ANAMOSA...MOVING EAST AT 50 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... THE SAFEST PLACE TO BE IN A TORNADO IS IN A BASEMENT OR INTERIOR ROOM OR HALLWAY ON THE LOWEST FLOOR OF A BUILDING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT WEDNESDAY EVENING FOR EASTERN IOWA AND NORTHWEST ILLINOIS. && LAT...LON 4217 9125 4206 9126 4212 9151 4218 9151 TIME...MOT...LOC 0104Z 278DEG 42KT 4211 9129 $$ 08
567 WWUS53 KDVN 090119 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 819 PM CDT WED JUN 8 2011 IAC113-090128- /O.CAN.KDVN.TO.W.0011.000000T0000Z-110609T0130Z/ LINN IA- 819 PM CDT WED JUN 8 2011 ...THE TORNADO WARNING FOR EAST CENTRAL LINN 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 GUSTY WINDS AND HEAVY RAIN. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT WEDNESDAY EVENING FOR EASTERN IOWA AND NORTHWEST ILLINOIS. LAT...LON 4217 9125 4206 9126 4208 9136 4217 9136 TIME...MOT...LOC 0118Z 278DEG 42KT 4207 9107 $$ IAC105-090130- /O.CON.KDVN.TO.W.0011.000000T0000Z-110609T0130Z/ JONES IA- 819 PM CDT WED JUN 8 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR WEST CENTRAL JONES COUNTY... AT 815 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A TORNADO. THIS TORNADO WAS LOCATED APPROXIMATELY 8 MILES EAST OF WAPSIPINICON STATE PARK...OR 8 MILES EAST OF ANAMOSA...MOVING EAST AT 50 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... THE SAFEST PLACE TO BE IN A TORNADO IS IN A BASEMENT OR INTERIOR ROOM OR HALLWAY ON THE LOWEST FLOOR OF A BUILDING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT WEDNESDAY EVENING FOR EASTERN IOWA AND NORTHWEST ILLINOIS. && LAT...LON 4217 9125 4206 9126 4208 9136 4217 9136 TIME...MOT...LOC 0118Z 278DEG 42KT 4207 9107 $$ 08
103 WWUS53 KDVN 090125 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 825 PM CDT WED JUN 8 2011 IAC105-090135- /O.EXP.KDVN.TO.W.0011.000000T0000Z-110609T0130Z/ JONES IA- 825 PM CDT WED JUN 8 2011 ...THE TORNADO WARNING FOR WEST CENTRAL JONES COUNTY WILL EXPIRE AT 830 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. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT WEDNESDAY EVENING FOR EASTERN IOWA AND NORTHWEST ILLINOIS. LAT...LON 4217 9125 4206 9126 4208 9136 4217 9136 TIME...MOT...LOC 0125Z 278DEG 42KT 4205 9096 $$ 08
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 7:03 PM CDT | Severe Thunderstorm Warning | DVN | Benton | 42 min |
| Jun 8, 7:29 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Linn | 61 min |
| Jun 8, 7:45 PM CDT | Severe Thunderstorm Warning | DVN | Jones, Linn | 75 min |
| Jun 8, 8:32 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Iowa | 13 min |
| Jun 8, 8:47 PM CDT | Severe Thunderstorm Warning | DVN | Jackson | 58 min |
| Jun 8, 8:54 PM CDT | Severe Thunderstorm Warning | DVN | Jones, Linn | 51 min |
| Jun 8, 8:57 PM CDT | Severe Thunderstorm Warning | DVN | Iowa, Johnson, Keokuk, Washington | 63 min |
| Jun 8, 9:00 PM CDT | Severe Thunderstorm Warning | DVN | Iowa | 28 min |
| Jun 8, 9:07 PM CDT | Severe Thunderstorm Warning | DVN | Johnson | 44 min |
| Jun 8, 9:23 PM CDT | Severe Thunderstorm Warning | DVN | Cedar | 52 min |
| Jun 8, 9:26 PM CDT | Severe Thunderstorm Warning | DVN | Keokuk | 21 min |
| Jun 8, 10:23 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Muscatine, Scott | 50 min |
| Jun 9, 12:06 AM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Muscatine, Scott | 29 min |
| Jun 9, 12:27 AM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton | 52 min |
| Jun 9, 3:05 AM CDT | Special Weather Statement | DVN | Benton | 40 min |
| Jun 9, 3:12 AM CDT | Flash Flood Watch | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more | 28 hr |
| Jun 9, 5:12 AM CDT | Severe Thunderstorm Warning | DVN | Scott | 63 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.