Alert archive / Missouri / Tornado Warnings in 2012
Tornado Warning 16, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 28, 2012, 6:01 PM CDT for Madison County, Saint Clair County, Illinois; Saint Charles County, Saint Louis County, City of Saint Louis, Missouri. It was in force for 29 min. 40 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 28, 2012, 6:01 PM CDT (23:01 UTC)
- Expired
- Apr 28, 2012, 6:30 PM CDT
- In force
- 29 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 2.75 in
Counties Madison County, IL, Saint Clair County, IL, City of Saint Louis, MO, Saint Charles County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 33 km from the middle of the area, began a volume at 23:03 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 28, 6:01 PM CDT | HAIL 1.75 | Maryland Heights, MO | WEST SIDE OF TOWN. |
| Apr 28, 6:02 PM CDT | HAIL 1 | Bridgeton, MO | |
| Apr 28, 6:03 PM CDT | HAIL 0 | Maryland Heights, MO | HAIL SIZE UNKOWN... BUT DAMAGE TO DOZENS OF MOTOR VEHICLES AND OFFICE BUILDING WINDOWS. TIME APPROXIMATE FROM RADAR. |
| Apr 28, 6:03 PM CDT | HAIL 1.75 | Creve Coeur, MO | |
| Apr 28, 6:05 PM CDT | HAIL 1.5 | 1 Nw Creve Coeur, MO | |
| Apr 28, 6:05 PM CDT | HAIL 1.75 | Overland, MO | |
| Apr 28, 6:06 PM CDT | HAIL 1.25 | 2 Sse Bridgeton, MO | |
| Apr 28, 6:07 PM CDT | HAIL 1.5 | Maryland Heights, MO | |
| Apr 28, 6:07 PM CDT | HAIL 1.75 | Creve Coeur, MO | SEVERALL VEHICLES IN THE AREA WITH BROKEN WINDOWS. |
| Apr 28, 6:08 PM CDT | HAIL 1.75 | St. Ann, MO | |
| Apr 28, 6:09 PM CDT | HAIL 2 | Maryland Heights, MO | |
| Apr 28, 6:10 PM CDT | HAIL 1.5 | Olivette, MO | |
| Apr 28, 6:10 PM CDT | HAIL 1.75 | Overland, MO | |
| Apr 28, 6:10 PM CDT | HAIL 1.75 | St. Ann, MO | |
| Apr 28, 6:10 PM CDT | HAIL 2.75 | Olivette, MO | NEAR OLIVE AND I 170 |
| Apr 28, 6:11 PM CDT | TSTM WND DMG | Brentwood, MO | TWO AND A HALF FOOT DIAMTER TREE TRUCK SNAPPED. TIME ESTIMATED FROM RADAR. |
| Apr 28, 6:13 PM CDT | HAIL 1.5 | St. John, MO | |
| Apr 28, 6:15 PM CDT | TSTM WND DMG | Brentwood, MO | 2.5 FT DIAMTER TREE UPROOTED |
| Apr 28, 6:15 PM CDT | HAIL 1.75 | St. John, MO | 1 MILE SOUTH OF I 70 ON ST. CHARLES ROCK ROAD...GOLFBALL SIZE HAIL LASTED FOR 15 MINUTES |
| Apr 28, 6:15 PM CDT | HAIL 2.75 | Brentwood, MO | RELAYED FROM PUBLIC |
| Apr 28, 6:15 PM CDT | HAIL 2.75 | St. John, MO | NEAR I 170 AND ST. CHARLES ROCK RD |
| Apr 28, 6:19 PM CDT | HAIL 1.75 | Overland, MO | |
| Apr 28, 6:19 PM CDT | HAIL 1.75 | St. Louis, MO | WASHINGTON UNIVERSITY |
| Apr 28, 6:20 PM CDT | TSTM WND DMG | St. Louis, MO | 15 INCH TREE SNAPPED NEAR INTERSECTION OF MACKLAND AND SOUTHWEST AVENUE. TIME APPROXIMATE FROM RADAR. |
| Apr 28, 6:20 PM CDT | HAIL 1 | Richmond Heights, MO | |
| Apr 28, 6:20 PM CDT | HAIL 1.75 | St. Louis, MO | NEAR BIG BEND AND KINGS HIGHWAY |
| Apr 28, 6:20 PM CDT | HAIL 1.75 | University City, MO | RETIRED |
| Apr 28, 6:20 PM CDT | HAIL 2.5 | Overland, MO | |
| Apr 28, 6:20 PM CDT | HAIL 3 | St. Louis, MO | NEAR EDWARDS JONES DOME |
| Apr 28, 6:21 PM CDT | HAIL 1.25 | St. Louis, MO | |
| Apr 28, 6:24 PM CDT | TSTM WND DMG | 2 Ese Maplewood, MO | A LARGE TREE WAS BLOWN OVER ONTO A HOUSE ON PERNOD AVENUE...CAUSING MODERATE DAMAGE. |
| Apr 28, 6:24 PM CDT | TSTM WND DMG | 2 Ese Maplewood, MO | LARGE TREE WAS BLOWN OVER ONTO AN UNOCCUPIED CAR ON MARQUETTE AVENUE. |
| Apr 28, 6:24 PM CDT | TSTM WND DMG | 2 Ese Maplewood, MO | LARGE TREE WAS UPROOTED ONTO A HOUSE CAUSING MINOR ROOF DAMAGE ON POTOMAC AVENUE. |
| Apr 28, 6:24 PM CDT | HAIL 1.75 | St. Louis, MO | NORTH CITY. |
| Apr 28, 6:25 PM CDT | TSTM WND GST 55 | St. Louis, MO | AT INTERSECTION OF CHIPPEWA AND KINGSHIGHWAY. |
| Apr 28, 6:29 PM CDT | HAIL 1.75 | 2 Sw Brooklyn, MO | GOLFBALL SIZED HAIL AT TUCKER AND MARKET. |
| Apr 28, 6:29 PM CDT | HAIL 3 | St. Louis, MO | ON NORTH SIDE OF TOWN. |
| Apr 28, 6:30 PM CDT | HAIL 1.75 | St. Louis, MO | HAMPTON AND I-44. |
| Apr 28, 6:33 PM CDT | HAIL 1 | St. Louis, MO | FROM THE KMOV WEATHER CAMERA. |
| Apr 28, 6:36 PM CDT | TSTM WND GST 52 | 1 Ese Sauget, 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 28, 1:48 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 28, 5:15 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.0 hours before the alert went out and 216 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
- 1019 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 681 m²/s²
- 0-3 km storm-relative helicity
- 811 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.0
The text
As transmitted, in the capitals the NWS used until 2016.
805
WFUS53 KLSX 282301
TORLSX
ILC119-163-MOC183-189-510-282330-
/O.NEW.KLSX.TO.W.0016.120428T2301Z-120428T2330Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
601 PM CDT SAT APR 28 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHWESTERN MADISON COUNTY IN SOUTHWEST ILLINOIS...
NORTHWESTERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS...
CENTRAL ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI...
NORTHERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...
ST. LOUIS CITY IN EAST CENTRAL MISSOURI...
* UNTIL 630 PM CDT
* AT 558 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
TORNADO WAS LOCATED NEAR MARYLAND HEIGHTS...AND MOVING EAST AT 45
MPH.
HAZARD...DEVELOPING TORNADO AND BASEBALL SIZE HAIL.
SOURCE...RADAR INDICATED ROTATION.
IMPACT...SIGNIFICANT HOUSE AND BUILDING DAMAGE POSSIBLE. MOBILE
HOMES COMPLETELY DESTROYED IF HIT. SOME TREES UPROOTED OR
SNAPPED. VEHICLES WILL LIKELY BE THROWN BY TORNADIC WINDS.
* LOCATIONS IMPACTED INCLUDE...
BRIDGETON...CREVE COEUR...FRONTENAC...ST. ANN...OLIVETTE...LAMBERT
FIELD...LADUE...HAZELWOOD...OVERLAND...WOODSON TERRACE...ST.
JOHN...BERKELEY...FLORISSANT...BRENTWOOD...KINLOCH...BEL-RIDGE...
UNIVERSITY CITY...RICHMOND HEIGHTS...CLAYTON AND MAPLEWOOD.
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 3877 9010 3856 9015 3865 9060 3883 9054
TIME...MOT...LOC 2301Z 277DEG 38KT 3869 9047
TORNADO...RADAR INDICATED
HAIL...2.75IN
$$
KANOFSKY2 follow-up statements
004
WWUS53 KLSX 282315
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
615 PM CDT SAT APR 28 2012
MOC183-282324-
/O.CAN.KLSX.TO.W.0016.000000T0000Z-120428T2330Z/
ST. CHARLES MO-
615 PM CDT SAT APR 28 2012
...THE TORNADO WARNING FOR CENTRAL ST. CHARLES COUNTY IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 3881 9043 3877 9010 3856 9015 3863 9048
TIME...MOT...LOC 2314Z 277DEG 38KT 3867 9030
$$
ILC119-163-MOC189-510-282330-
/O.CON.KLSX.TO.W.0016.000000T0000Z-120428T2330Z/
MADISON IL-ST. CLAIR IL-ST. LOUIS MO-ST. LOUIS CITY MO-
615 PM CDT SAT APR 28 2012
...A TORNADO WARNING REMAINS IN EFFECT FOR ST. LOUIS CITY...CENTRAL
ST. LOUIS...NORTHWESTERN ST. CLAIR AND SOUTHWESTERN MADISON COUNTIES
UNTIL 630 PM CDT...
AT 611 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR UNIVERSITY CITY...AND MOVING EAST AT 45 MPH.
HAZARD...DEVELOPING TORNADO AND BASEBALL SIZE HAIL.
SOURCE...RADAR INDICATED ROTATION.
IMPACT...SIGNIFICANT HOUSE AND BUILDING DAMAGE POSSIBLE. MOBILE HOMES
COMPLETELY DESTROYED IF HIT. SOME TREES UPROOTED OR SNAPPED.
VEHICLES WILL LIKELY BE THROWN BY TORNADIC WINDS.
IN ADDITION...BASEBALL SIZE HAIL WAS REPORTED IN MARYLAND HEIGHTS
WITH THIS STORM.
LOCATIONS IMPACTED INCLUDE...
JENNINGS...BELLEFONTAINE NEIGHBORS...ST. LOUIS...RIVERVIEW...
VENICE...CAHOKIA...MADISON...GRANITE CITY...BROOKLYN AND SAUGET.
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 3881 9043 3877 9010 3856 9015 3863 9048
TIME...MOT...LOC 2314Z 277DEG 38KT 3867 9030
TORNADO...RADAR INDICATED
HAIL...2.75IN
$$
KANOFSKY107 WWUS53 KLSX 282330 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 630 PM CDT SAT APR 28 2012 ILC119-163-MOC189-510-282340- /O.EXP.KLSX.TO.W.0016.000000T0000Z-120428T2330Z/ MADISON IL-ST. CLAIR IL-ST. LOUIS MO-ST. LOUIS CITY MO- 630 PM CDT SAT APR 28 2012 ...THE TORNADO WARNING FOR ST. LOUIS CITY...CENTRAL ST. LOUIS... NORTHWESTERN ST. CLAIR AND SOUTHWESTERN MADISON COUNTIES HAS EXPIRED... THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS EXPIRED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR THE AREA. HOWEVER LARGE HAIL IS STILL POSSIBLE WITH THIS THUNDERSTORM AND THREE INCH HAIL WAS REPORTED IN DOWNTOWN ST. LOUIS. IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 7 PM. LAT...LON 3881 9043 3877 9010 3856 9015 3863 9048 TIME...MOT...LOC 2330Z 277DEG 38KT 3865 9009 $$ KANOFSKY
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 2:26 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 49 min |
| Apr 28, 3:05 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Jersey, Madison | 40 min |
| Apr 28, 3:45 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Madison, Saint Clair | 45 min |
| Apr 28, 3:59 PM CDT | Tornado Warning | LSX | Saint Clair | 31 min |
| Apr 28, 4:22 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Saint Clair, Washington | 38 min |
| Apr 28, 4:28 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Saint Clair, Washington | 47 min |
| Apr 28, 4:56 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Saint Clair, Washington | 49 min |
| Apr 28, 5:13 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Marion, Washington | 47 min |
| Apr 28, 5:38 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Saint Clair, Washington | 37 min |
| Apr 28, 5:50 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 40 min |
| Apr 28, 6:10 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 34 min |
| Apr 28, 6:17 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Washington | 33 min |
| Apr 28, 6:27 PM CDT | Severe Thunderstorm Warning | LSX | Madison, Saint Clair | 48 min |
| Apr 28, 6:35 PM CDT | Severe Thunderstorm Warning | LSX | Fayette, Marion | 25 min |
| Apr 28, 6:53 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Saint Clair, Washington | 52 min |
| Apr 28, 6:58 PM CDT | Severe Thunderstorm Warning | LSX | Fayette, Marion | 32 min |
| Apr 28, 1:14 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Montgomery | 46 min |
| Apr 28, 1:50 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Montgomery, Warren | 40 min |
| Apr 28, 4:12 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone, Callaway | 38 min |
| Apr 28, 4:49 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Washington | 41 min |
| Apr 28, 4:55 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Montgomery, Warren | 50 min |
| Apr 28, 5:19 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Saint Charles, Warren | 41 min |
| Apr 28, 5:27 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Jefferson, Saint Francois, Washington | 48 min |
Nearby
Tornado Warnings in Missouri, 2012Tornado Warnings in Illinois, 2012Every tornado warning in 2012Tornadoes 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.