Alert archive / Illinois / Tornado Warnings in 2011
Tornado Warning 37, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 19, 2011, 8:18 PM CDT for Randolph County, Saint Clair County, Washington County, Illinois. It was in force for 42 min. 4 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 19, 2011, 8:18 PM CDT (01:18 UTC)
- Expired
- Apr 19, 2011, 9:00 PM CDT
- In force
- 42 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
Counties Randolph County, IL, Saint Clair County, IL, Washington County, IL
The radar
The St Louis radar (KLSX), 110 km from the middle of the area, began a volume at 01:19 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 19, 8:21 PM CDT | TSTM WND DMG | Marissa, IL | TREES AND POWER LINES DOWN IN MARISSA |
| Apr 19, 8:25 PM CDT | TSTM WND GST 50 | Marissa, IL | |
| Apr 19, 8:40 PM CDT | TSTM WND DMG | Sparta, IL | 2 INCH DIAMETER TREE BRANCHES BLOWN DOWN |
| Apr 19, 8:44 PM CDT | TSTM WND DMG | Nashville, IL | STORM CHASER OBSERVING MULTIPLE POWER FLASHES |
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 19, 1:00 PM CDT | Tornado Watch | SPC | 10 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 1.3 hours before the alert went out and 228 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
- 2409 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 523 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 370 m²/s²
- 0-3 km storm-relative helicity
- 547 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 24.4
The text
As transmitted, in the capitals the NWS used until 2016.
160
WFUS53 KLSX 200118
TORLSX
ILC157-163-189-200200-
/O.NEW.KLSX.TO.W.0037.110420T0118Z-110420T0200Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
818 PM CDT TUE APR 19 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* TORNADO WARNING FOR...
RANDOLPH COUNTY IN SOUTHWEST ILLINOIS...
SOUTHEASTERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS...
WASHINGTON COUNTY IN SOUTH CENTRAL ILLINOIS...
* UNTIL 900 PM CDT
* AT 814 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE SQUALL LINE CAPABLE OF PRODUCING BRIEF RAIN-WRAPPED
TORNADOES IN ADDITION TO WIDESPREAD STRAIGHT LINE WIND DAMAGE.
THESE DANGEROUS STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
BALDWIN TO 10 MILES NORTHEAST OF PERRYVILLE...AND MOVING
NORTHEAST AT 55 MPH. THE STRONGEST ROTATION...AND THE MOST
DANGEROUS PART OF THE STORM...IS LOCATED NEAR SPARTA.
* LOCATIONS IMPACTED INCLUDE...
SPARTA...NASHVILLE...MARISSA...STEELEVILLE...TILDEN...PERCY...
COULTERVILLE...LIVELY GROVE...OKAWVILLE...ASHLEY...IRVINGTON...
EDEN...ST. LIBORY...STONE CHURCH...JOHANNISBURG...VENEDY...
ELKTON...OAKDALE...ADDIEVILLE AND CORDES.
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 3821 8959 3795 8960 3784 8966 3781 8971
3785 8975 3790 8986 3823 8991 3841 8971
3847 8961 3848 8955 3846 8948 3849 8946
3849 8939 3850 8938 3850 8916 3822 8914
TIME...MOT...LOC 0117Z 229DEG 46KT 3823 8977 3782 8967
$$
CVKING3 follow-up statements
606
WWUS53 KLSX 200131
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
831 PM CDT TUE APR 19 2011
ILC157-163-200141-
/O.CAN.KLSX.TO.W.0037.000000T0000Z-110420T0200Z/
RANDOLPH IL-ST. CLAIR IL-
831 PM CDT TUE APR 19 2011
...THE TORNADO WARNING FOR SOUTHEASTERN ST. CLAIR AND EASTERN
RANDOLPH COUNTIES IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA. HOWEVER...ADDITIONAL STRONG THUNDERSTORMS ARE POSSIBLE...AND
A TORNADO WATCH REMAINS IN EFFECT UNTIL 9 PM.
LAT...LON 3821 8960 3822 8971 3841 8971 3844 8965
3844 8964 3847 8961 3848 8955 3846 8948
3849 8946 3849 8939 3850 8938 3850 8916
3822 8914
TIME...MOT...LOC 0131Z 226DEG 54KT 3833 8953
$$
ILC189-200200-
/O.CON.KLSX.TO.W.0037.000000T0000Z-110420T0200Z/
WASHINGTON IL-
831 PM CDT TUE APR 19 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR WASHINGTON COUNTY UNTIL
900 PM CDT...
AT 827 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR LIVELY GROVE...OR 12 MILES NORTHEAST OF
SPARTA...MOVING NORTHEAST AT 60 MPH.
LOCATIONS IMPACTED INCLUDE...
NASHVILLE...OKAWVILLE...ASHLEY...IRVINGTON...CORDES...POSEN...
ADDIEVILLE...FROGTOWN...DU BOIS...COVINGTON...BEAUCOUP...RADOM...
NEW MINDEN...HUEGELY...HOYLETON AND RICHVIEW.
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 3821 8960 3822 8971 3841 8971 3844 8965
3844 8964 3847 8961 3848 8955 3846 8948
3849 8946 3849 8939 3850 8938 3850 8916
3822 8914
TIME...MOT...LOC 0131Z 226DEG 54KT 3833 8953
$$
TRUETT429
WWUS53 KLSX 200146
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
846 PM CDT TUE APR 19 2011
ILC189-200200-
/O.CON.KLSX.TO.W.0037.000000T0000Z-110420T0200Z/
WASHINGTON IL-
846 PM CDT TUE APR 19 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR WASHINGTON COUNTY UNTIL
900 PM CDT...
AT 840 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR NASHVILLE...MOVING NORTHEAST AT 60 MPH. A
STORM CHASER IN THE AREA REPORTS POWER LINE FLASHES JUST SOUTH OF
INTERSTATE 64 IN THE NASHVILLE AREA...AND POWER LINE FLASHES ARE
OFTEN INDICATIONS OF A TORNADO ON THE GROUND!
ADDITIONAL ROTATION IS ALSO BEING INDICATED ON RADAR NEAR DU BOIS.
LOCATIONS IMPACTED INCLUDE...
NASHVILLE...IRVINGTON...HOYLETON AND RICHVIEW.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.
&&
LAT...LON 3821 8960 3822 8971 3841 8971 3844 8965
3844 8964 3847 8961 3848 8955 3846 8948
3849 8946 3849 8939 3850 8938 3850 8916
3822 8914
TIME...MOT...LOC 0145Z 231DEG 54KT 3844 8930
$$
TRUETT604
WWUS53 KLSX 200200
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
900 PM CDT TUE APR 19 2011
ILC189-200210-
/O.EXP.KLSX.TO.W.0037.000000T0000Z-110420T0200Z/
WASHINGTON IL-
900 PM CDT TUE APR 19 2011
...THE TORNADO WARNING FOR WASHINGTON COUNTY HAS EXPIRED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO
WATCH REMAINS IN EFFECT UNTIL MIDNIGHT.
LAT...LON 3821 8960 3822 8971 3841 8971 3844 8965
3844 8964 3847 8961 3848 8955 3846 8948
3849 8946 3849 8939 3850 8938 3850 8916
3822 8914
TIME...MOT...LOC 0146Z 231DEG 54KT 3845 8928
$$
TRUETTThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 19, 7:30 PM CDT | Tornado Warning | LSX | Madison, Saint Clair | 45 min |
| Apr 19, 7:34 PM CDT | Tornado Warning | LSX | Randolph | 41 min |
| Apr 19, 7:35 PM CDT | Severe Thunderstorm Warning | LSX | Fayette, Montgomery | 40 min |
| Apr 19, 7:37 PM CDT | Tornado Warning | LSX | Monroe | 36 min |
| Apr 19, 7:51 PM CDT | Tornado Warning | LSX | Saint Clair | 39 min |
| Apr 19, 7:54 PM CDT | Tornado Warning | LSX | Randolph | 36 min |
| Apr 19, 7:56 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Montgomery | 34 min |
| Apr 19, 8:00 PM CDT | Tornado Warning | LSX | Bond, Clinton, Madison | 45 min |
| Apr 19, 8:02 PM CDT | Areal Flood Advisory | LSX | Bond, Macoupin, Montgomery | 4 hr |
| Apr 19, 8:25 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Madison, Saint Clair | 22 min |
| Apr 19, 8:33 PM CDT | Tornado Warning | LSX | Fayette | 42 min |
| Apr 19, 8:33 PM CDT | Tornado Warning | LSX | Bond, Clinton, Fayette, Marion, Washington | 57 min |
| Apr 19, 9:37 PM CDT | Severe Thunderstorm Warning | LSX | Madison | 21 min |
| Apr 19, 9:41 PM CDT | River Flood Warning | LSX | Fayette | 13 days |
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.