Alert archive / Iowa / Tornado Warnings in 2011
Tornado Warning 15, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Jul 27, 2011, 8:29 PM CDT for Dubuque County, Jackson County, Iowa. It was in force for 46 min. 1 report 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 27, 2011, 8:29 PM CDT (01:29 UTC)
- Expired
- Jul 27, 2011, 9:15 PM CDT
- In force
- 46 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
Counties Dubuque County, IA, Jackson County, IA
The radar
The Quad Cities radar (KDVN), 74 km from the middle of the area, began a volume at 01:32 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 27, 9:12 PM CDT | FUNNEL CLOUD | 1 N Springbrook, IA | RELAYED BY JACKSON EMERGENCY MANAGER. |
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 27, 7:43 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 1.5 hours before the alert went out and 73 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
- 4556 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 962 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 141 m²/s²
- 0-3 km storm-relative helicity
- 316 m²/s²
- Significant tornado parameter
- 3.9
- Supercell composite
- 19.4
The text
As transmitted, in the capitals the NWS used until 2016.
727
WFUS53 KDVN 280129
TORDVN
IAC061-097-280215-
/O.NEW.KDVN.TO.W.0015.110728T0129Z-110728T0215Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
829 PM CDT WED JUL 27 2011
THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A
* TORNADO WARNING FOR...
JACKSON COUNTY IN EAST CENTRAL IOWA...
SOUTHEASTERN DUBUQUE COUNTY IN NORTHEAST IOWA...
* UNTIL 915 PM CDT.
* AT 823 PM CDT...TRAINED SPOTTERS AND DOPPLER RADAR INDICATED A
FUNNEL OR WALL CLOUD WITH A POSSIBLE TORNADO NEAR ZWINGLE ...OR
14 MILES SOUTH OF DUBUQUE... MOVING EAST AT 20 MPH.
* THE TORNADO WILL BE NEAR...
ZWINGLE AND OTTER CREEK THROUGH 840 PM CDT...
LA MOTTE AROUND 850 PM CDT...
COTTONVILLE AROUND 855 PM CDT...
BELLEVUE...SPRINGBROOK AND SMITHS AROUND 915 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 TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT THURSDAY MORNING
FOR NORTHEASTERN IOWA AND NORTHWEST ILLINOIS.
&&
LAT...LON 4236 9045 4233 9042 4228 9043 4226 9042
4222 9038 4220 9033 4209 9038 4223 9084
4229 9086 4237 9082
TIME...MOT...LOC 0128Z 287DEG 16KT 4231 9074
$$
LE1 follow-up statement
014
WWUS53 KDVN 280144
SVSDVN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
844 PM CDT WED JUL 27 2011
IAC061-280153-
/O.CAN.KDVN.TO.W.0015.000000T0000Z-110728T0215Z/
DUBUQUE IA-
844 PM CDT WED JUL 27 2011
...THE TORNADO WARNING FOR SOUTHEASTERN DUBUQUE COUNTY IS
CANCELLED...
THE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING A TORNADO HAS MOVED
SOUTHEAST OUT OF THE WARNED AREA. THEREFORE THE TORNADO WARNING HAS
BEEN CANCELLED.
HOWEVER...THIS STORM IS STILL CAPABLE OF PRODUCING VERY HEAVY
RAINFALL.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT THURSDAY MORNING
FOR NORTHEASTERN IOWA AND NORTHWEST ILLINOIS.
LAT...LON 4236 9045 4233 9042 4228 9043 4225 9042
4222 9038 4220 9033 4209 9038 4219 9071
4228 9067 4237 9066
TIME...MOT...LOC 0143Z 287DEG 16KT 4229 9065
$$
IAC097-280215-
/O.CON.KDVN.TO.W.0015.000000T0000Z-110728T0215Z/
JACKSON IA-
844 PM CDT WED JUL 27 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR EASTERN
JACKSON COUNTY...
AT 840 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A POSSIBLE TORNADO. THIS TORNADO WAS LOCATED APPROXIMATELY
NEAR LA MOTTE...OR 15 MILES SOUTH OF DUBUQUE...MOVING EAST AT 20 MPH.
THE TORNADO WILL BE NEAR...
COTTONVILLE AROUND 855 PM CDT...
BELLEVUE...SMITHS AND SPRINGBROOK AROUND 915 PM CDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT THURSDAY MORNING
FOR NORTHEASTERN IOWA AND NORTHWEST ILLINOIS.
&&
LAT...LON 4236 9045 4233 9042 4228 9043 4225 9042
4222 9038 4220 9033 4209 9038 4219 9071
4228 9067 4237 9066
TIME...MOT...LOC 0143Z 287DEG 16KT 4229 9065
$$
LEThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 7:10 PM CDT | Flash Flood Warning | DVN | Dubuque, Jackson | 9 hr |
| Jul 27, 7:35 PM CDT | Tornado Warning | DVN | Dubuque, Jackson | 40 min |
| Jul 27, 9:16 PM CDT | Tornado Warning | DVN | Jackson | 31 min |
| Jul 27, 11:55 PM CDT | Flash Flood Warning | DVN | Jackson | 4 hr |
| Jul 28, 12:50 AM CDT | Special Weather Statement | DVN | Delaware, Dubuque, Jackson | 55 min |
| Jul 28, 1:13 AM CDT | Flash Flood Warning | DVN | Buchanan, Delaware | 5 hr |
| Jul 28, 4:10 AM CDT | Areal Flood Warning | DVN | Delaware, Dubuque, Jackson, Jones | 12 hr |
| Jul 28, 9:26 AM CDT | Special Weather Statement | DVN | Benton, Buchanan, Delaware, Linn | 64 min |
| Jul 28, 9:40 AM CDT | Special Weather Statement | DVN | Muscatine, Scott | 50 min |
| Jul 28, 10:15 AM CDT | River Flood Warning | DVN | Dubuque, Jackson | 6 hr |
| Jul 28, 10:15 AM CDT | River Flood Warning | DVN | Jackson | 6 hr |
| Jul 28, 12:03 PM CDT | Heat Advisory | DVN | Des Moines, Henry, Jefferson, Keokuk, Lee, Louisa and 2 more | 10 hr |
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.