Alert archive / Illinois / Tornado Warnings in 2011
Tornado Warning 56, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 22, 2011, 10:31 PM CDT for Monroe County, Randolph County, Saint Clair County, Illinois. It was in force for 44 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
- Apr 22, 2011, 10:31 PM CDT (03:31 UTC)
- Expired
- Apr 22, 2011, 11:15 PM CDT
- In force
- 44 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
Counties Monroe County, IL, Randolph County, IL, Saint Clair County, IL
The radar
The St Louis radar (KLSX), 76 km from the middle of the area, began a volume at 03:31 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 22, 5:49 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 3.5 hours before the alert went out and 240 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
- 342 J/kg
- Mixed-layer CIN
- -152 J/kg
- Mixed-layer LCL
- 492 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- 351 m²/s²
- 0-3 km storm-relative helicity
- 346 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
669
WFUS53 KLSX 230331
TORLSX
ILC133-157-163-230415-
/O.NEW.KLSX.TO.W.0056.110423T0331Z-110423T0415Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1031 PM CDT FRI APR 22 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* TORNADO WARNING FOR...
CENTRAL MONROE COUNTY IN SOUTHWEST ILLINOIS...
NORTH CENTRAL RANDOLPH COUNTY IN SOUTHWEST ILLINOIS...
SOUTHERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS...
* UNTIL 1115 PM CDT
* AT 1027 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 VALMEYER...OR 7 MILES
SOUTHWEST OF WATERLOO...AND MOVING EAST AT 50 MPH.
* LOCATIONS IMPACTED INCLUDE...
WATERLOO...RED BUD...FREEBURG...MASCOUTAH...NEW DESIGN...
SMITHTON...NEW ATHENS...MARISSA...BARR...FLORAVILLE...PADERBORN...
HECKER...LENZBURG AND FAYETTEVILLE.
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 3815 9024 3832 9032 3857 8975 3826 8971
3822 8972
TIME...MOT...LOC 0331Z 249DEG 44KT 3827 9017
$$
GLASS4 follow-up statements
615
WWUS53 KLSX 230340
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1040 PM CDT FRI APR 22 2011
ILC133-157-163-230415-
/O.CON.KLSX.TO.W.0056.000000T0000Z-110423T0415Z/
RANDOLPH IL-MONROE IL-ST. CLAIR IL-
1040 PM CDT FRI APR 22 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN ST. CLAIR...
EASTERN MONROE AND NORTH CENTRAL RANDOLPH COUNTIES UNTIL 1115 PM
CDT...
AT 1039 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR NEW DESIGN...OR NEAR RED BUD...MOVING EAST AT
50 MPH.
LOCATIONS IMPACTED INCLUDE...
RED BUD...FREEBURG...SMITHTON...NEW ATHENS...MARISSA...HECKER...
LENZBURG AND FAYETTEVILLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.
&&
LAT...LON 3822 8972 3817 9011 3840 9013 3851 8974
3830 8971
TIME...MOT...LOC 0341Z 264DEG 42KT 3826 9002
$$
GLASS693
WWUS53 KLSX 230353
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1053 PM CDT FRI APR 22 2011
ILC133-157-163-230415-
/O.CON.KLSX.TO.W.0056.000000T0000Z-110423T0415Z/
RANDOLPH IL-MONROE IL-ST. CLAIR IL-
1053 PM CDT FRI APR 22 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN ST. CLAIR...
EAST CENTRAL MONROE AND NORTH CENTRAL RANDOLPH COUNTIES UNTIL 1115 PM
CDT...
AT 1051 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED 5 MILES SOUTH OF NEW ATHENS...OR 6 MILES NORTHEAST
OF RED BUD...MOVING EAST AT 40 MPH.
LOCATIONS IMPACTED INCLUDE...
MARISSA...LENZBURG AND FAYETTEVILLE.
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 3822 8972 3819 8999 3837 8999 3844 8973
3830 8971
TIME...MOT...LOC 0353Z 272DEG 37KT 3825 8987
$$
GLASS507
WWUS53 KLSX 230357
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1057 PM CDT FRI APR 22 2011
ILC133-157-230407-
/O.CAN.KLSX.TO.W.0056.000000T0000Z-110423T0415Z/
RANDOLPH IL-MONROE IL-
1057 PM CDT FRI APR 22 2011
...THE TORNADO WARNING FOR EAST CENTRAL MONROE AND NORTH CENTRAL
RANDOLPH COUNTIES IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 3823 8990 3832 8990 3840 8973 3830 8971
3822 8972
TIME...MOT...LOC 0357Z 272DEG 37KT 3825 8982
$$
ILC163-230415-
/O.CON.KLSX.TO.W.0056.000000T0000Z-110423T0415Z/
ST. CLAIR IL-
1057 PM CDT FRI APR 22 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN ST. CLAIR
COUNTY UNTIL 1115 PM CDT...
AT 1055 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR BALDWIN...OR 9 MILES EAST OF RED BUD...MOVING
EAST AT 45 MPH.
LOCATIONS IMPACTED INCLUDE...
MARISSA.
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 3823 8990 3832 8990 3840 8973 3830 8971
3822 8972
TIME...MOT...LOC 0357Z 272DEG 37KT 3825 8982
$$
GLASS717
WWUS53 KLSX 230408
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1108 PM CDT FRI APR 22 2011
ILC163-230419-
/O.EXP.KLSX.TO.W.0056.000000T0000Z-110423T0415Z/
ST. CLAIR IL-
1108 PM CDT FRI APR 22 2011
...THE TORNADO WARNING FOR SOUTHEASTERN ST. CLAIR COUNTY WILL EXPIRE
AT 1115 PM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.
LAT...LON 3823 8990 3832 8990 3840 8973 3830 8971
3822 8972
TIME...MOT...LOC 0409Z 272DEG 37KT 3825 8966
$$
GLASSThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 22, 7:59 PM CDT | Tornado Warning | LSX | Madison, Saint Clair | 46 min |
| Apr 22, 8:21 PM CDT | Tornado Warning | LSX | Monroe, Saint Clair | 39 min |
| Apr 22, 8:33 PM CDT | Tornado Warning | LSX | Madison, Saint Clair | 42 min |
| Apr 22, 8:48 PM CDT | Tornado Warning | LSX | Monroe, Saint Clair | 57 min |
| Apr 22, 8:55 PM CDT | Tornado Warning | LSX | Bond, Clinton, Fayette, Madison, Saint Clair | 50 min |
| Apr 22, 9:01 PM CDT | Severe Thunderstorm Warning | LSX | Fayette, Marion | 20 min |
| Apr 22, 9:24 PM CDT | Tornado Warning | LSX | Clinton, Washington | 36 min |
| Apr 22, 9:30 PM CDT | Flash Flood Warning | LSX | Monroe, Saint Clair | 5 hr |
| Apr 22, 9:41 PM CDT | Tornado Warning | LSX | Bond, Fayette, Marion | 22 min |
| Apr 22, 9:51 PM CDT | Flash Flood Warning | LSX | Clinton, Washington | 5 hr |
| Apr 22, 9:59 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Marion, Washington | 11 min |
| Apr 22, 10:55 PM CDT | Flash Flood Warning | LSX | Monroe, Randolph | 6 hr |
| Apr 22, 11:38 PM CDT | River Flood Warning | LSX | Brown | 25 days |
| Apr 22, 11:38 PM CDT | River Flood Warning | LSX | Morgan, Pike | 25 days |
| Apr 22, 11:38 PM CDT | River Flood Warning | LSX | Pike, Scott | 31 days |
| Apr 22, 11:53 PM CDT | River Flood Warning | LSX | Saint Clair | 14 days |
| Apr 23, 4:23 AM CDT | Flash Flood Warning | LSX | Monroe, Randolph | 8 hr |
| Apr 23, 12:29 PM CDT | Flash Flood Warning | LSX | Monroe, Randolph | 6 hr |
| Apr 23, 6:22 PM CDT | Flash Flood Warning | LSX | Monroe, Randolph | 6 hr |
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.