Alert archive / Illinois / Tornado Warnings in 2011
Tornado Warning 7, NWS Chicago, IL
NWS Chicago, IL issued this tornado warning at May 13, 2011, 12:35 PM CDT for Grundy County, Kankakee County, Will County, Illinois. It was in force for 40 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 13, 2011, 12:35 PM CDT (17:35 UTC)
- Expired
- May 13, 2011, 1:15 PM CDT
- In force
- 40 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
Counties Grundy County, IL, Kankakee County, IL, Will County, IL
The radar
The Chicago radar (KLOT), 28 km from the middle of the area, began a volume at 17:37 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.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 5.6 hours before the alert went out and 140 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
- 1586 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- -48 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
136 WFUS53 KLOT 131735 TORLOT ILC063-091-197-131815- /O.NEW.KLOT.TO.W.0007.110513T1735Z-110513T1815Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 1235 PM CDT FRI MAY 13 2011 THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A * TORNADO WARNING FOR... EAST CENTRAL GRUNDY COUNTY... WEST CENTRAL KANKAKEE COUNTY... SOUTHWESTERN WILL COUNTY... * UNTIL 115 PM CDT * AT 1233 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR BRACEVILLE...OR 6 MILES SOUTHWEST OF WILMINGTON...AND MOVING NORTHEAST AT 25 MPH. * THIS TORNADIC STORM WILL BE NEAR... BRAIDWOOD...DIAMOND AND COAL CITY AROUND 1240 PM. LAKEWOOD SHORES AROUND 1245 PM. WILMINGTON AROUND 1250 PM. CHANNAHON AROUND 105 PM. ELWOOD AROUND 110 PM. MANHATTAN AND ROCKDALE AROUND 115 PM. OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE SYMERTON. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. && LAT...LON 4153 8817 4142 8791 4112 8819 4121 8839 TIME...MOT...LOC 1735Z 211DEG 20KT 4124 8823 $$ KREIN
1 follow-up statement
194
WWUS53 KLOT 131752
SVSLOT
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1252 PM CDT FRI MAY 13 2011
ILC091-131802-
/O.CAN.KLOT.TO.W.0007.000000T0000Z-110513T1815Z/
KANKAKEE IL-
1252 PM CDT FRI MAY 13 2011
...THE TORNADO WARNING FOR WEST CENTRAL KANKAKEE COUNTY IS
CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT THE WARNED AREA.
LAT...LON 4142 8791 4120 8815 4120 8825 4124 8833
4153 8817
TIME...MOT...LOC 1752Z 219DEG 20KT 4128 8822
$$
ILC063-197-131815-
/O.CON.KLOT.TO.W.0007.000000T0000Z-110513T1815Z/
WILL IL-GRUNDY IL-
1252 PM CDT FRI MAY 13 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL GRUNDY AND
SOUTHWESTERN WILL COUNTIES UNTIL 115 PM CDT...
AT 1249 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR BRAIDWOOD...OR NEAR WILMINGTON...MOVING
NORTHEAST AT 20 MPH.
THIS DANGEROUS STORM WILL BE NEAR...
WILMINGTON AND LAKEWOOD SHORES AROUND 100 PM CDT.
CHANNAHON AROUND 110 PM CDT.
ELWOOD AROUND 115 PM CDT.
OTHER LOCATIONS IMPACTED BY THIS TORNADO INCLUDE SYMERTON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 4142 8791 4120 8815 4120 8825 4124 8833
4153 8817
TIME...MOT...LOC 1752Z 219DEG 20KT 4128 8822
$$
KREINThe office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 3:19 AM CDT | Small Craft Advisory | LOT | 40 hr | |
| May 13, 7:04 AM CDT | Areal Flood Advisory | LOT | Boone, Winnebago | 6 hr |
| May 13, 12:35 PM CDT | Severe Thunderstorm Warning | LOT | Boone, DeKalb, McHenry | 55 min |
| May 13, 1:02 PM CDT | Areal Flood Advisory | LOT | Boone, DeKalb, McHenry | 3 hr |
| May 13, 1:17 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Lee, Ogle | 58 min |
| May 13, 1:26 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb | 24 min |
| May 13, 1:30 PM CDT | Tornado Warning | LOT | DeKalb | 45 min |
| May 13, 1:33 PM CDT | Flash Flood Warning | LOT | Boone, DeKalb, LaSalle, Lee, McHenry, Ogle | 6 hr |
| May 13, 1:45 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb | 35 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.