Alert archive / Illinois / Tornado Warnings in 2011
Tornado Warning 14, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Jul 27, 2011, 7:51 PM CDT for Jo Daviess County, Stephenson County, Illinois. It was in force for 39 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, 7:51 PM CDT (00:51 UTC)
- Expired
- Jul 27, 2011, 8:30 PM CDT
- In force
- 39 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
Counties Jo Daviess County, IL, Stephenson County, IL
The radar
The Quad Cities radar (KDVN), 111 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 |
|---|---|---|---|
| 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, 7:55 PM CDT | TORNADO | 4 Wnw Lena, IL | POSSIBLE TORNADO NEAR TIGER WHIP ROAD. |
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, 0.9 hours before the alert went out and 107 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.
282
WFUS53 KDVN 280051
TORDVN
ILC085-177-280130-
/O.NEW.KDVN.TO.W.0014.110728T0051Z-110728T0130Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
751 PM CDT WED JUL 27 2011
THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A
* TORNADO WARNING FOR...
NORTHEASTERN JO DAVIESS COUNTY IN NORTHWEST ILLINOIS...
NORTHERN STEPHENSON COUNTY IN NORTHWEST ILLINOIS...
* UNTIL 830 PM CDT.
* AT 745 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A POSSIBLE TORNADO 3 MILES NORTH OF STOCKTON...OR 19 MILES WEST OF
FREEPORT...MOVING EAST AT 20 MPH.
* THE TORNADO WILL BE NEAR...
KENT AROUND 755 PM CDT...
WADDAMS GROVE AROUND 800 PM CDT...
LAKE LEAQUANA STATE PARK AND LENA AROUND 805 PM CDT...
ELEROY AND WINSLOW AROUND 815 PM CDT...
MC CONNELL AROUND 820 PM CDT...
BUENA VISTA...RED OAK AND DAMASCUS AROUND 825 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.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT THURSDAY MORNING
FOR NORTHEASTERN IOWA AND NORTHWEST ILLINOIS.
&&
LAT...LON 4250 8992 4250 8941 4229 8940 4230 9007
4248 9009
TIME...MOT...LOC 0050Z 266DEG 19KT 4240 8995
$$
LE2 follow-up statements
270 WWUS53 KDVN 280107 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 807 PM CDT WED JUL 27 2011 ILC085-280115- /O.CAN.KDVN.TO.W.0014.000000T0000Z-110728T0130Z/ JO DAVIESS IL- 807 PM CDT WED JUL 27 2011 ...THE TORNADO WARNING FOR NORTHEASTERN JO DAVIESS COUNTY IS CANCELLED... THE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING A TORNADO HAS MOVED EAST OUT OF THE WARNED AREA. THEREFORE THIS TORNADO WARNING HAS BEEN CANCELLED. HOWEVER...ANOTHER TORNADO WARNING WITH A POSSIBLE TORNADO REMAINS IN EFFECT FOR ANOTHER PORTION OF THE COUNTY. A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT THURSDAY MORNING FOR NORTHEASTERN IOWA AND NORTHWEST ILLINOIS. LAT...LON 4230 8992 4250 8992 4250 8941 4229 8940 TIME...MOT...LOC 0105Z 266DEG 19KT 4241 8984 $$ ILC177-280130- /O.CON.KDVN.TO.W.0014.000000T0000Z-110728T0130Z/ STEPHENSON IL- 807 PM CDT WED JUL 27 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR NORTHERN STEPHENSON COUNTY... AT 802 PM CDT...TRAINED SPOTTERS AND DOPPLER RADAR INDICATED A TORNADO. THIS TORNADO WAS LOCATED APPROXIMATELY NEAR WADDAMS GROVE...OR 14 MILES NORTHWEST OF FREEPORT...MOVING EAST AT 20 MPH. THE TORNADO WILL BE NEAR... ELEROY AND WINSLOW AROUND 815 PM CDT... MC CONNELL AROUND 820 PM CDT... DAMASCUS AROUND 825 PM CDT... BUENA VISTA...RED OAK...CEDARVILLE AND ORANGEVILLE AROUND 830 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 4230 8992 4250 8992 4250 8941 4229 8940 TIME...MOT...LOC 0105Z 266DEG 19KT 4241 8984 $$ LE
365 WWUS53 KDVN 280130 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 830 PM CDT WED JUL 27 2011 ILC177-280140- /O.EXP.KDVN.TO.W.0014.000000T0000Z-110728T0130Z/ STEPHENSON IL- 830 PM CDT WED JUL 27 2011 ...THE TORNADO WARNING FOR NORTHERN STEPHENSON COUNTY HAS EXPIRED... THE SEVERE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING A TORNADO HAS WEAKENED...AND A TORNADO IS NO LONGER EXPECTED. THEREFORE THE TORNADO WARNING HAS BEEN ALLOWED TO EXPIRE. A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT THURSDAY MORNING FOR NORTHEASTERN IOWA AND NORTHWEST ILLINOIS. LAT...LON 4230 8992 4250 8992 4250 8941 4229 8940 TIME...MOT...LOC 0107Z 266DEG 19KT 4241 8983 $$ LE
The 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, 7:35 PM CDT | Tornado Warning | DVN | Jo Daviess | 40 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 |
Nearby
Tornado 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.