Alert archive / Illinois / Tornado Warnings in 2011
Tornado Warning 27, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 19, 2011, 6:31 PM CDT for Montgomery County, Illinois. It was in force for 27 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 19, 2011, 6:31 PM CDT (23:31 UTC)
- Expired
- Apr 19, 2011, 6:58 PM CDT
- In force
- 27 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
County Montgomery County, IL
The radar
The Lincoln radar (KILX), 98 km from the middle of the area, began a volume at 23:34 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 19, 1:00 PM CDT | Tornado Watch | SPC | 10 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.5 hours before the alert went out and 116 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
- 453 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 189 m²/s²
- 0-3 km storm-relative helicity
- 345 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.4
The text
As transmitted, in the capitals the NWS used until 2016.
346
WFUS53 KLSX 192331
TORLSX
ILC135-200015-
/O.NEW.KLSX.TO.W.0027.110419T2331Z-110420T0015Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
631 PM CDT TUE APR 19 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* TORNADO WARNING FOR...
CENTRAL MONTGOMERY COUNTY IN SOUTH CENTRAL ILLINOIS...
* UNTIL 715 PM CDT
* AT 628 PM CDT...STORM SPOTTERS AND NATIONAL WEATHER SERVICE DOPPLER
RADAR WERE TRACKING A LARGE AND EXTREMELY DANGEROUS TORNADO NEAR
RAYMOND...OR 9 MILES NORTHEAST OF LITCHFIELD. DOPPLER RADAR
SHOWED THIS TORNADO MOVING EAST-NORTHEAST AT 55 MPH.
* LOCATIONS IMPACTED INCLUDE...
NOKOMIS...WITT...IRVING...COALTON...WENONAH AND OHLMAN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TO REPEAT...A LARGE...EXTREMELY DANGEROUS AND POTENTIALLY DEADLY
TORNADO IS ON THE GROUND. TO PROTECT YOUR LIFE...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.
HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TAKE COVER NOW.
&&
LAT...LON 3922 8922 3921 8922 3919 8957 3935 8956
3936 8954 3935 8914 3922 8914
TIME...MOT...LOC 2331Z 256DEG 39KT 3929 8952
$$
TILLY2 follow-up statements
009
WWUS53 KLSX 192347
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
647 PM CDT TUE APR 19 2011
ILC135-200015-
/O.CON.KLSX.TO.W.0027.000000T0000Z-110420T0015Z/
MONTGOMERY IL-
647 PM CDT TUE APR 19 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL MONTGOMERY
COUNTY UNTIL 715 PM CDT...
AT 645 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR AND STORM
SPOTTERS WERE TRACKING A LARGE AND EXTREMELY DANGEROUS TORNADO. THIS
TORNADO WAS LOCATED NEAR NOKOMIS...MOVING EAST-NORTHEAS AT 55 MPH.
THIS STORM HAS A HISTORY OF PRODUCING A LARGE TORNADO. TAKE COVER
NOW.
LOCATIONS IMPACTED INCLUDE...
OHLMAN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TO REPEAT...A LARGE...EXTREMELY DANGEROUS AND POTENTIALLY DEADLY
TORNADO IS ON THE GROUND. TO PROTECT YOUR LIFE...TAKE COVER NOW. MOVE
TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID
WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE
CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.
HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TAKE COVER NOW.
&&
LAT...LON 3922 8914 3922 8922 3921 8922 3921 8926
3920 8945 3935 8946 3935 8914
TIME...MOT...LOC 2347Z 258DEG 40KT 3932 8930
$$
TILLY963
WWUS53 KLSX 192358
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
658 PM CDT TUE APR 19 2011
ILC135-200008-
/O.CAN.KLSX.TO.W.0027.000000T0000Z-110420T0015Z/
MONTGOMERY IL-
658 PM CDT TUE APR 19 2011
...THE TORNADO WARNING FOR EAST CENTRAL MONTGOMERY COUNTY IS
CANCELLED...
THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
BEEN CANCELLED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN
EFFECT FOR THE AREA.
ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO
WATCH REMAINS IN EFFECT UNTIL 900 PM.
LAT...LON 3922 8914 3922 8922 3921 8922 3921 8926
3920 8945 3935 8946 3935 8914
TIME...MOT...LOC 2358Z 251DEG 43KT 3935 8914
$$
TILLYThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 19, 4:35 AM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Pike | 40 min |
| Apr 19, 5:14 AM CDT | Severe Thunderstorm Warning | LSX | Greene, Pike | 31 min |
| Apr 19, 6:21 AM CDT | Areal Flood Advisory | LSX | Madison, Monroe, Saint Clair | 3 hr |
| Apr 19, 6:22 AM CDT | Severe Thunderstorm Warning | LSX | Monroe, Randolph, Saint Clair | 38 min |
| Apr 19, 6:26 AM CDT | Severe Thunderstorm Warning | LSX | Madison, Saint Clair | 49 min |
| Apr 19, 6:56 AM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 49 min |
| Apr 19, 7:08 AM CDT | Severe Thunderstorm Warning | LSX | Jersey, Macoupin, Madison, Montgomery | 37 min |
| Apr 19, 7:36 AM CDT | Severe Thunderstorm Warning | LSX | Bond, Macoupin, Madison, Montgomery | 39 min |
| Apr 19, 8:07 AM CDT | Severe Thunderstorm Warning | LSX | Bond, Fayette, Montgomery | 38 min |
| Apr 19, 8:25 AM CDT | Severe Thunderstorm Warning | LSX | Fayette, Marion | 29 min |
| Apr 19, 8:41 AM CDT | Severe Thunderstorm Warning | LSX | Fayette | 34 min |
| Apr 19, 11:18 AM CDT | River Flood Warning | LSX | Calhoun, Greene, Jersey | 85 days |
| Apr 19, 3:46 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 44 min |
| Apr 19, 3:59 PM CDT | Tornado Warning | LSX | Pike | 46 min |
| Apr 19, 4:18 PM CDT | Tornado Warning | LSX | Calhoun, Greene, Pike | 42 min |
| Apr 19, 4:31 PM CDT | Tornado Warning | LSX | Calhoun | 44 min |
| Apr 19, 4:41 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey, Macoupin, Madison | 49 min |
| Apr 19, 4:59 PM CDT | Tornado Warning | LSX | Greene, Pike | 46 min |
| Apr 19, 5:28 PM CDT | Severe Thunderstorm Warning | LSX | Greene, Jersey, Macoupin | 47 min |
| Apr 19, 5:28 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 47 min |
| Apr 19, 5:36 PM CDT | Tornado Warning | LSX | Macoupin | 39 min |
| Apr 19, 5:42 PM CDT | Severe Thunderstorm Warning | LSX | Greene | 34 min |
| Apr 19, 5:44 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Jersey | 34 min |
| Apr 19, 6:01 PM CDT | Tornado Warning | LSX | Montgomery | 44 min |
| Apr 19, 6:05 PM CDT | Tornado Warning | LSX | Macoupin, Montgomery | 40 min |
| Apr 19, 6:12 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 48 min |
| Apr 19, 6:14 PM CDT | Severe Thunderstorm Warning | LSX | Jersey, Macoupin, Madison | 61 min |
| Apr 19, 6:56 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Macoupin, Madison, Montgomery | 64 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.