Alert archive / Iowa / Tornado Warnings in 2011
Tornado Warning 13, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Jul 27, 2011, 7:35 PM CDT for Jo Daviess County, Illinois; Dubuque County, Jackson County, Iowa. It was in force for 40 min. 2 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
- Jul 27, 2011, 7:35 PM CDT (00:35 UTC)
- Expired
- Jul 27, 2011, 8:15 PM CDT
- In force
- 40 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
Counties Dubuque County, IA, Jackson County, IA, Jo Daviess County, IL
The radar
The Quad Cities radar (KDVN), 89 km from the middle of the area, began a volume at 00:37 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, 7:55 PM CDT | TORNADO | 3 Ne Stockton, IL | POSSIBLE TORNADO TOUCHDOWN NEAR JO DAVIES / STEPHENSON COUNTY LINE...RELAYED EMERGENCY MANAGER. |
| Jul 27, 8:04 PM CDT | HAIL 1 | Apple Canyon Lake, IL | TIME ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 0.6 hours before the alert went out and 88 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.
491
WFUS53 KDVN 280035
TORDVN
IAC061-097-ILC085-280115-
/O.NEW.KDVN.TO.W.0013.110728T0035Z-110728T0115Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
735 PM CDT WED JUL 27 2011
THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A
* TORNADO WARNING FOR...
NORTH CENTRAL JACKSON COUNTY IN EAST CENTRAL IOWA...
SOUTHEASTERN DUBUQUE COUNTY IN NORTHEAST IOWA...
JO DAVIESS COUNTY IN NORTHWEST ILLINOIS...
* UNTIL 815 PM CDT.
* AT 728 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A POSSIBLE TORNADO NEAR DUBUQUE REGIONAL AIRPORT...OR 8 MILES
SOUTH OF DUBUQUE...MOVING EAST AT 25 MPH. ANOTHER STORM WITH A
POSSIBLE TORNADO IS 5 MILES SOUTHEAST OF GALENA...ALSO MOVING EAST
AT 25 MPH.
* THE TORNADO WILL BE NEAR...
MASSEY AROUND 740 PM CDT...
ST. DONATUS AROUND 745 PM CDT...
GALENA...AIKEN...RICE AND SMITHS THROUGH 800 PM CDT...
GALENA TERRITORY AND RODDEN THROUGH 810 PM CDT...
GUILFORD THROUGH 815 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.
PLEASE REPORT ANY SEVERE WEATHER OR DAMAGE TO YOUR LOCAL LAW
ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.
&&
LAT...LON 4248 9060 4248 8993 4226 8993 4231 9074
4243 9074
TIME...MOT...LOC 0033Z 266DEG 21KT 4239 9063
$$
LE2 follow-up statements
185
WWUS53 KDVN 280056
SVSDVN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
756 PM CDT WED JUL 27 2011
IAC061-097-280104-
/O.CAN.KDVN.TO.W.0013.000000T0000Z-110728T0115Z/
JACKSON IA-DUBUQUE IA-
756 PM CDT WED JUL 27 2011
...THE TORNADO WARNING FOR SOUTHEASTERN DUBUQUE AND NORTH CENTRAL
JACKSON COUNTIES IS CANCELLED...
THE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING A TORNADO HAS MOVED
EAST OUT OF THE WARNED AREA. THEREFORE THE TORNADO WARNING HAS BEEN
CANCELLED.
HOWEVER...THIS STORM IS STILL CAPABLE OF PRODUCING VERY HEAVY
RAINFALL WITH RAINFALL RATES OF OVER AN INCH AN HOUR.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT THURSDAY MORNING
FOR NORTHEASTERN IOWA AND NORTHWEST ILLINOIS.
LAT...LON 4248 8993 4226 8993 4229 9041 4233 9042
4238 9047 4248 9045
TIME...MOT...LOC 0054Z 266DEG 21KT 4240 9046
$$
ILC085-280115-
/O.CON.KDVN.TO.W.0013.000000T0000Z-110728T0115Z/
JO DAVIESS IL-
756 PM CDT WED JUL 27 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR CENTRAL
JO DAVIESS COUNTY...
AT 750 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A POSSIBLE TORNADO. THIS TORNADO WAS LOCATED APPROXIMATELY
NEAR GALENA...MOVING EAST AT 25 MPH.
THE TORNADO WILL BE NEAR...
GALENA...AIKEN AND RICE AROUND 800 PM CDT...
GALENA TERRITORY AND RODDEN AROUND 810 PM CDT...
GUILFORD...SCHAPVILLE...SCALES MOUND AND APPLE CANYON LAKE AROUND
815 PM CDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 100 AM CDT THURSDAY MORNING
FOR NORTHEASTERN IOWA AND NORTHWEST ILLINOIS.
&&
LAT...LON 4248 8993 4226 8993 4229 9041 4233 9042
4238 9047 4248 9045
TIME...MOT...LOC 0054Z 266DEG 21KT 4240 9046
$$
LE856
WWUS53 KDVN 280114
SVSDVN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
814 PM CDT WED JUL 27 2011
ILC085-280124-
/O.EXP.KDVN.TO.W.0013.000000T0000Z-110728T0115Z/
JO DAVIESS IL-
814 PM CDT WED JUL 27 2011
...THE TORNADO WARNING FOR CENTRAL JO DAVIESS COUNTY WILL EXPIRE AT
815 PM CDT...
HOWEVER...THIS STORM IS STILL CAPABLE OF PRODUCING VERY HEAVY
RAINFALL...STRONG GUSTY WINDS AND SMALL HAIL.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT THURSDAY MORNING
FOR NORTHEASTERN IOWA AND NORTHWEST ILLINOIS.
LAT...LON 4248 8993 4226 8993 4229 9041 4233 9042
4238 9047 4248 9045
TIME...MOT...LOC 0114Z 266DEG 21KT 4241 9030
$$
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 | Jo Daviess | 9 hr |
| Jul 27, 7:51 PM CDT | Tornado Warning | DVN | Jo Daviess, Stephenson | 39 min |
| Jul 27, 8:40 PM CDT | Flash Flood Warning | DVN | Stephenson | 8 hr |
| Jul 27, 9:16 PM CDT | Tornado Warning | DVN | Carroll, Jo Daviess | 31 min |
| Jul 27, 11:55 PM CDT | Flash Flood Warning | DVN | Carroll | 4 hr |
| Jul 28, 12:50 AM CDT | Special Weather Statement | DVN | Carroll, Jo Daviess, Stephenson | 55 min |
| Jul 28, 4:10 AM CDT | Areal Flood Warning | DVN | Carroll, Jo Daviess, Stephenson | 12 hr |
| Jul 28, 9:40 AM CDT | Special Weather Statement | DVN | Rock Island, Whiteside | 50 min |
| Jul 28, 10:15 AM CDT | River Flood Warning | DVN | Jo Daviess | 6 hr |
| Jul 28, 10:15 AM CDT | River Flood Warning | DVN | Carroll, Jo Daviess | 6 hr |
| Jul 28, 10:15 AM CDT | River Flood Warning | DVN | Stephenson | 43 hr |
| Jul 28, 12:03 PM CDT | Heat Advisory | DVN | Hancock, Henderson, McDonough, Mercer, Warren | 10 hr |
| Jul 28, 3:39 PM CDT | Areal Flood Warning | DVN | Carroll, Jo Daviess, Stephenson | 6 hr |
| Jul 27, 8:29 PM CDT | Tornado Warning | DVN | Dubuque, Jackson | 46 min |
| Jul 28, 1:13 AM CDT | Flash Flood Warning | DVN | Buchanan, Delaware | 5 hr |
| Jul 28, 9:26 AM CDT | Special Weather Statement | DVN | Benton, Buchanan, Delaware, Linn | 64 min |
Nearby
Tornado Warnings in Iowa, 2011Tornado Warnings in Illinois, 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.