Alert archive / Illinois / Tornado Warnings in 2011
Tornado Warning 25, NWS Chicago, IL
NWS Chicago, IL issued this tornado warning at Aug 12, 2011, 5:29 PM CDT for Ogle County, Illinois. It was in force for 46 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
- Aug 12, 2011, 5:29 PM CDT (22:29 UTC)
- Expired
- Aug 12, 2011, 6:15 PM CDT
- In force
- 46 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
County Ogle County, IL
The radar
The Quad Cities radar (KDVN), 114 km from the middle of the area, began a volume at 22:30 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
Davenport, (KDVN), launched 12:00Z, 10.5 hours before the alert went out and 108 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
- 1545 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
661
WFUS53 KLOT 122229
TORLOT
ILC141-122315-
/O.NEW.KLOT.TO.W.0025.110812T2229Z-110812T2315Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
529 PM CDT FRI AUG 12 2011
THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A
* TORNADO WARNING FOR...
NORTH CENTRAL OGLE COUNTY...
* UNTIL 615 PM CDT
* AT 528 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR GERMAN VALLEY...OR 10 MILES SOUTHEAST OF
FREEPORT...AND MOVING EAST AT 15 MPH.
* LOCATIONS IMPACTED INCLUDE...
BYRON...ADELINE AND LEAF RIVER.
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 4217 8957 4220 8955 4220 8933 4218 8922
4206 8930
TIME...MOT...LOC 2229Z 291DEG 14KT 4219 8949
$$
BMD3 follow-up statements
033
WWUS53 KLOT 122238
SVSLOT
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
538 PM CDT FRI AUG 12 2011
ILC141-122315-
/O.CON.KLOT.TO.W.0025.000000T0000Z-110812T2315Z/
OGLE IL-
538 PM CDT FRI AUG 12 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR NORTH CENTRAL OGLE COUNTY
UNTIL 615 PM CDT...
AT 537 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR GERMAN VALLEY...OR 9 MILES NORTH OF MOUNT
MORRIS...MOVING EAST AT 15 MPH.
LOCATIONS IMPACTED INCLUDE...
BYRON AND LEAF RIVER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 4217 8957 4220 8955 4220 8933 4218 8922
4206 8930
TIME...MOT...LOC 2238Z 291DEG 14KT 4218 8945
$$
BMD518
WWUS53 KLOT 122256
SVSLOT
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
556 PM CDT FRI AUG 12 2011
ILC141-122315-
/O.CON.KLOT.TO.W.0025.000000T0000Z-110812T2315Z/
OGLE IL-
556 PM CDT FRI AUG 12 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR NORTH CENTRAL OGLE COUNTY
UNTIL 615 PM CDT...
AT 551 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED 6 MILES SOUTHEAST OF GERMAN VALLEY...OR 8 MILES
NORTH OF MOUNT MORRIS...MOVING EAST AT 15 MPH.
LOCATIONS IMPACTED INCLUDE...
BYRON.
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 4215 8950 4220 8950 4220 8933 4218 8922
4206 8930
TIME...MOT...LOC 2256Z 291DEG 14KT 4215 8936
$$
BMD717
WWUS53 KLOT 122318
SVSLOT
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
618 PM CDT FRI AUG 12 2011
ILC141-122328-
/O.EXP.KLOT.TO.W.0025.000000T0000Z-110812T2315Z/
OGLE IL-
618 PM CDT FRI AUG 12 2011
...THE TORNADO WARNING FOR NORTH CENTRAL OGLE COUNTY HAS EXPIRED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA...HOWEVER HEAVY RAIN IS STILL POSSIBLE WITH THIS THUNDERSTORM.
REMEMBER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR
EASTERN OGLE COUNTY UNTIL 715 PM CDT.
LAT...LON 4215 8950 4220 8950 4220 8933 4218 8922
4206 8930
TIME...MOT...LOC 2256Z 291DEG 14KT 4215 8936
$$
BEACHLERThe office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 5:21 PM CDT | Special Weather Statement | LOT | Ogle | 24 min |
| Aug 12, 6:11 PM CDT | Areal Flood Advisory | LOT | Ogle, Winnebago | 4 hr |
| Aug 12, 6:17 PM CDT | Severe Thunderstorm Warning | LOT | Ogle, Winnebago | 58 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.