Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 92, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Aug 9, 2012, 4:20 PM CDT for DeWitt County, McLean County, Piatt County, Illinois. It was in force for 38 min. 5 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
- Aug 9, 2012, 4:20 PM CDT (21:20 UTC)
- Expired
- Aug 9, 2012, 4:58 PM CDT
- In force
- 38 min
- Issued by
- NWS Lincoln, IL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties DeWitt County, IL, McLean County, IL, Piatt County, IL
The radar
The Lincoln radar (KILX), 59 km from the middle of the area, began a volume at 21:21 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 |
|---|---|---|---|
| Aug 9, 4:25 PM CDT | TSTM WND DMG | 5 W Bloomington, IL | TREES BLOWN DOWN...RELAYED BY ILLINOIS STATE POLICE |
| Aug 9, 4:25 PM CDT | HAIL 1 | 3 Sw Bloomington, IL | |
| Aug 9, 4:25 PM CDT | HAIL 1.5 | 5 W Bloomington, IL | 1.5 INCH HAIL...RELAYED BY ILLINOIS STATE POLICE |
| Aug 9, 4:30 PM CDT | HAIL 1.5 | 2 N Heyworth, IL | SWOP REPORT. |
| Aug 9, 4:35 PM CDT | TSTM WND GST 65 | 1 Sw Bloomington, IL | MEASURED 65 MPH WIND GUST |
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 |
|---|---|---|---|
| Aug 9, 4:02 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 9.3 hours before the alert went out and 30 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
- 396 J/kg
- Mixed-layer CIN
- -236 J/kg
- Mixed-layer LCL
- 1480 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
906 WUUS53 KILX 092120 SVRILX ILC039-113-147-092215- /O.NEW.KILX.SV.W.0092.120809T2120Z-120809T2215Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LINCOLN IL 420 PM CDT THU AUG 9 2012 THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN DE WITT COUNTY IN CENTRAL ILLINOIS... SOUTHERN MCLEAN COUNTY IN CENTRAL ILLINOIS... NORTHEASTERN PIATT COUNTY IN CENTRAL ILLINOIS... * UNTIL 515 PM CDT. * AT 417 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR BLOOMINGTON...AND MOVING SOUTHEAST AT 35 MPH. * LOCATIONS IMPACTED INCLUDE... BLOOMINGTON...DOWNS...LE ROY...SAYBROOK...FARMER CITY... MANSFIELD...WHITE HEATH...SHIRLEY...BLOOMINGTON AIRPORT...HOLDER... ELLSWORTH...MORAINE VIEW STATE PARK...ARROWSMITH...BELLFLOWER AND GALESVILLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4048 8846 4006 8847 4043 8919 4057 8908 TIME...MOT...LOC 2120Z 300DEG 29KT 4046 8903 WIND...HAIL 60MPH 1.00IN $$ CHS
2 follow-up statements
298 WWUS53 KILX 092129 SVSILX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LINCOLN IL 429 PM CDT THU AUG 9 2012 ILC039-113-147-092215- /O.CON.KILX.SV.W.0092.000000T0000Z-120809T2215Z/ MCLEAN IL-PIATT IL-DE WITT IL- 429 PM CDT THU AUG 9 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN DE WITT...NORTHEASTERN PIATT AND SOUTHERN MCLEAN COUNTIES UNTIL 515 PM CDT... AT 426 PM CDT...LOCAL LAW ENFORCEMENT REPORTED A SEVERE THUNDERSTORM PRODUCING PING PONG BALL SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS STORM WAS LOCATED NEAR BLOOMINGTON...MOVING SOUTHEAST AT 40 MPH. LOCATIONS IMPACTED INCLUDE... DOWNS...LE ROY...SAYBROOK...FARMER CITY...MANSFIELD...WHITE HEATH...HOLDER...ELLSWORTH...MORAINE VIEW STATE PARK... ARROWSMITH...BELLFLOWER AND GALESVILLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS IF YOU ARE IN THE PATH OF THIS STORM. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS. && LAT...LON 4053 8901 4048 8846 4006 8847 4038 8909 TIME...MOT...LOC 2129Z 305DEG 33KT 4040 8895 WIND...HAIL 70MPH 1.50IN $$ CHS
139 WWUS53 KILX 092158 SVSILX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LINCOLN IL 458 PM CDT THU AUG 9 2012 ILC039-113-147-092208- /O.CAN.KILX.SV.W.0092.000000T0000Z-120809T2215Z/ MCLEAN IL-PIATT IL-DE WITT IL- 458 PM CDT THU AUG 9 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN DE WITT... NORTHEASTERN PIATT AND SOUTHERN MCLEAN COUNTIES IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 9 PM. LAT...LON 4053 8901 4048 8846 4006 8847 4038 8909 TIME...MOT...LOC 2158Z 305DEG 33KT 4025 8867 $$ CHS
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 3:20 PM CDT | Severe Thunderstorm Warning | ILX | Marshall | 25 min |
| Aug 9, 3:40 PM CDT | Severe Thunderstorm Warning | ILX | McLean, Marshall, Woodford | 65 min |
| Aug 9, 5:45 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Edgar, Vermilion | 60 min |
| Aug 9, 6:17 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Douglas, Edgar, Vermilion | 58 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2012Every severe thunderstorm warning in 2012
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.