Alert archive / Illinois / Tornado Warnings in 2011
Tornado Warning 19, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 15, 2011, 5:10 PM CDT for Madison County, Saint Clair County, Illinois. It was in force for 35 min. 9 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
- Apr 15, 2011, 5:10 PM CDT (22:10 UTC)
- Expired
- Apr 15, 2011, 5:45 PM CDT
- In force
- 35 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
Counties Madison County, IL, Saint Clair County, IL
The radar
The St Louis radar (KLSX), 64 km from the middle of the area, began a volume at 22:13 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 |
|---|---|---|---|
| Apr 15, 5:16 PM CDT | HAIL 0.7 | Wood River, IL | |
| Apr 15, 5:17 PM CDT | HAIL 1 | Wood River, IL | |
| Apr 15, 5:18 PM CDT | HAIL 0.25 | Collinsville, IL | |
| Apr 15, 5:21 PM CDT | HAIL 0.7 | Belleville, IL | NEAR SCOTT AIR FORCE BASE. |
| Apr 15, 5:24 PM CDT | HAIL 0.25 | Collinsville, IL | |
| Apr 15, 5:25 PM CDT | HAIL 0.25 | Belleville, IL | AT SCOTT AIR FORCE BASE. |
| Apr 15, 5:27 PM CDT | HAIL 0.25 | Edwardsville, IL | |
| Apr 15, 5:29 PM CDT | HAIL 0.88 | Pontoon Beach, IL | |
| Apr 15, 5:41 PM CDT | HAIL 0.25 | Granite City, IL |
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 |
|---|---|---|---|
| Apr 15, 12:47 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 10.2 hours before the alert went out and 190 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
- 1776 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
951 WFUS53 KLSX 152210 TORLSX ILC119-163-152245- /O.NEW.KLSX.TO.W.0019.110415T2210Z-110415T2245Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 510 PM CDT FRI APR 15 2011 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * TORNADO WARNING FOR... MADISON COUNTY IN SOUTHWEST ILLINOIS... NORTHERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS... * UNTIL 545 PM CDT * AT 508 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR SWANSEA...AND MOVING NORTHEAST AT 60 MPH. * LOCATIONS IMPACTED INCLUDE... CASEYVILLE...SCOTT AFB...O'FALLON...GRANITE CITY...COLLINSVILLE... LEBANON...PONTOON BEACH...MARYVILLE...GLEN CARBON...TROY... EDWARDSVILLE...WOOD RIVER...BETHALTO...HARTFORD...ROXANA...ST. JACOB...MARINE...CARPENTER...DORSEY AND PRAIRIETOWN. 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 3899 9007 3899 8965 3850 8983 3856 9017 TIME...MOT...LOC 2211Z 212DEG 51KT 3860 9000 $$ GLASS
3 follow-up statements
517 WWUS53 KLSX 152224 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 524 PM CDT FRI APR 15 2011 ILC163-152234- /O.CAN.KLSX.TO.W.0019.000000T0000Z-110415T2245Z/ ST. CLAIR IL- 524 PM CDT FRI APR 15 2011 ...THE TORNADO WARNING FOR NORTHERN ST. CLAIR COUNTY IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. LAT...LON 3866 9013 3899 9007 3899 8965 3866 8977 TIME...MOT...LOC 2224Z 209DEG 48KT 3875 8990 $$ ILC119-152245- /O.CON.KLSX.TO.W.0019.000000T0000Z-110415T2245Z/ MADISON IL- 524 PM CDT FRI APR 15 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL MADISON COUNTY UNTIL 545 PM CDT... AT 521 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR MARYVILLE...MOVING NORTHEAST AT 55 MPH. LOCATIONS IMPACTED INCLUDE... EDWARDSVILLE...WOOD RIVER...BETHALTO...ROXANA...ST. JACOB... MARINE...CARPENTER...DORSEY...PRAIRIETOWN...WORDEN...ALHAMBRA... LIVINGSTON...KUHN...FRUIT...HAMEL...KAUFMAN...WILLIAMSON AND NEW DOUGLAS. 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 3866 9013 3899 9007 3899 8965 3866 8977 TIME...MOT...LOC 2224Z 209DEG 48KT 3875 8990 $$ GLASS
654 WWUS53 KLSX 152238 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 538 PM CDT FRI APR 15 2011 ILC119-152245- /O.CON.KLSX.TO.W.0019.000000T0000Z-110415T2245Z/ MADISON IL- 538 PM CDT FRI APR 15 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL MADISON COUNTY UNTIL 545 PM CDT... AT 534 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR CARPENTER...OR 8 MILES NORTHEAST OF EDWARDSVILLE...MOVING NORTH AT 55 MPH. LOCATIONS IMPACTED INCLUDE... PRAIRIETOWN...LIVINGSTON...WILLIAMSON AND NEW DOUGLAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. && LAT...LON 3866 9013 3899 9007 3899 8965 3866 8977 TIME...MOT...LOC 2238Z 201DEG 47KT 3892 8982 $$ GLASS
623 WWUS53 KLSX 152247 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 547 PM CDT FRI APR 15 2011 ILC119-152258- /O.EXP.KLSX.TO.W.0019.000000T0000Z-110415T2245Z/ MADISON IL- 547 PM CDT FRI APR 15 2011 ...THE TORNADO WARNING FOR CENTRAL MADISON COUNTY HAS EXPIRED... 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 TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM. LAT...LON 3866 9013 3899 9007 3899 8965 3866 8977 TIME...MOT...LOC 2238Z 201DEG 47KT 3892 8982 $$ GLASS
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 1:09 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 51 min |
| Apr 15, 1:53 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Pike | 35 min |
| Apr 15, 2:23 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Pike | 22 min |
| Apr 15, 2:52 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Pike | 53 min |
| Apr 15, 2:54 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 51 min |
| Apr 15, 4:08 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 18 min |
| Apr 15, 4:12 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey, Macoupin, Pike | 48 min |
| Apr 15, 4:13 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin | 47 min |
| Apr 15, 4:21 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 39 min |
| Apr 15, 4:43 PM CDT | Severe Thunderstorm Warning | LSX | Madison, Saint Clair | 47 min |
| Apr 15, 4:54 PM CDT | Tornado Warning | LSX | Macoupin | 38 min |
| Apr 15, 4:56 PM CDT | Tornado Warning | LSX | Montgomery | 34 min |
| Apr 15, 5:37 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Marion, Washington | 38 min |
| Apr 15, 6:05 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Montgomery | 40 min |
| Apr 15, 6:07 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Fayette, Marion | 53 min |
| Apr 15, 6:42 PM CDT | Severe Thunderstorm Warning | LSX | Fayette | 28 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.