Alert archive / Missouri / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 133, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 29, 2012, 1:44 AM CDT for Saint Charles County, Saint Louis County, City of Saint Louis, Missouri; Madison County, Illinois. It was in force for 46 min. 1 report 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 29, 2012, 1:44 AM CDT (06:44 UTC)
- Expired
- Apr 29, 2012, 2:30 AM CDT
- In force
- 46 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Madison County, IL, City of Saint Louis, MO, Saint Charles County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 40 km from the middle of the area, began a volume at 06:46 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 29, 1:52 AM CDT | HAIL 0.5 | 1 Se Florissant, MO | AT ST. LOUIS COMMUNITY COLLEGE AT FLORISSANT VALLEY CAMPUS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 6.7 hours before the alert went out and 207 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
- 545 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 131 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
261 WUUS53 KLSX 290644 SVRLSX ILC119-MOC183-189-510-290730- /O.NEW.KLSX.SV.W.0133.120429T0644Z-120429T0730Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 144 AM CDT SUN APR 29 2012 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN MADISON COUNTY IN SOUTHWEST ILLINOIS... EAST CENTRAL ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI... NORTHEASTERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI... NORTHERN ST. LOUIS CITY IN EAST CENTRAL MISSOURI... * UNTIL 230 AM CDT * AT 141 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR BERKELEY... AND MOVING EAST AT 15 MPH. HAZARD...QUARTER SIZE HAIL. SOURCE...RADAR INDICATED. IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. * LOCATIONS IMPACTED INCLUDE... NORMANDY...FERGUSON...HILLSDALE...NORTHWOODS...DELLWOOD... JENNINGS...BLACK JACK...BELLEFONTAINE NEIGHBORS...RIVERVIEW... SPANISH LAKE...VENICE...MADISON...GRANITE CITY...BEVERLY HILLS AND UPLANDS PARK. PRECAUTIONARY/PREPAREDNESS ACTIONS... FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A BUILDING. TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS! && LAT...LON 3886 9011 3867 9011 3868 9040 3885 9042 TIME...MOT...LOC 0645Z 268DEG 15KT 3876 9031 HAIL...1.00IN WIND...<50 MPH $$ KANOFSKY
2 follow-up statements
535
WWUS53 KLSX 290708
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
208 AM CDT SUN APR 29 2012
MOC183-290718-
/O.CAN.KLSX.SV.W.0133.000000T0000Z-120429T0730Z/
ST. CHARLES MO-
208 AM CDT SUN APR 29 2012
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL ST. CHARLES
COUNTY IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA. ADDITIONAL THUNDERSTORMS WILL BE POSSIBLE THROUGH THE
OVERNIGHT HOURS.
LAT...LON 3867 9011 3869 9034 3880 9031 3881 9012
3880 9012 3881 9011
TIME...MOT...LOC 0708Z 269DEG 17KT 3876 9014
$$
ILC119-MOC189-510-290730-
/O.CON.KLSX.SV.W.0133.000000T0000Z-120429T0730Z/
MADISON IL-ST. LOUIS MO-ST. LOUIS CITY MO-
208 AM CDT SUN APR 29 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
ST. LOUIS CITY...NORTHEASTERN ST. LOUIS AND SOUTHWESTERN MADISON
COUNTIES UNTIL 230 AM CDT...
AT 204 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR RIVERVIEW...
AND MOVING EAST AT 20 MPH.
HAZARD...QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS.
LOCATIONS IMPACTED INCLUDE...
GRANITE CITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS!
&&
LAT...LON 3867 9011 3869 9034 3880 9031 3881 9012
3880 9012 3881 9011
TIME...MOT...LOC 0708Z 269DEG 17KT 3876 9014
HAIL...1.00IN
WIND...<50 MPH
$$
TILLY307
WWUS53 KLSX 290724
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
224 AM CDT SUN APR 29 2012
ILC119-MOC189-510-290733-
/O.EXP.KLSX.SV.W.0133.000000T0000Z-120429T0730Z/
MADISON IL-ST. LOUIS MO-ST. LOUIS CITY MO-
224 AM CDT SUN APR 29 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ST. LOUIS CITY...
NORTHEASTERN ST. LOUIS AND SOUTHWESTERN MADISON COUNTIES WILL EXPIRE
AT 230 AM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA. NICKEL SIZED HAIL IS STILL POSSIBLE WITH THIS STORM
AS IT CONTINUES TO MOVE EAST THROUGH PORTIONS OF MADISON COUNTY.
LAT...LON 3867 9011 3869 9034 3880 9031 3881 9012
3880 9012 3881 9011
TIME...MOT...LOC 0723Z 269DEG 17KT 3876 9005
$$
TILLYThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 8:12 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Saint Louis | 48 min |
| Apr 28, 8:39 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson | 36 min |
| Apr 29, 1:47 AM CDT | Severe Thunderstorm Warning | LSX | Boone, Callaway, Cole | 32 min |
| Apr 29, 2:22 AM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone | 38 min |
| Apr 29, 2:52 AM CDT | Severe Thunderstorm Warning | LSX | Monroe | 38 min |
| Apr 29, 3:05 AM CDT | Severe Thunderstorm Warning | LSX | Callaway | 44 min |
| Apr 29, 4:00 AM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Montgomery, Pike | 27 min |
| Apr 29, 4:59 AM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Pike | 46 min |
| Apr 29, 4:00 PM CDT | Flash Flood Watch | LSX | Audrain, Boone, Callaway, Cole, Crawford, Franklin and 14 more | 15 hr |
| Apr 28, 7:41 PM CDT | Areal Flood Advisory | LSX | Clinton, Saint Clair, Washington | 6 hr |
| Apr 28, 9:05 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Randolph, Saint Clair | 33 min |
| Apr 28, 9:31 PM CDT | Severe Thunderstorm Warning | LSX | Randolph, Saint Clair, Washington | 33 min |
| Apr 28, 10:01 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Macoupin, Madison, Montgomery | 34 min |
| Apr 28, 10:25 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Montgomery | 28 min |
| Apr 29, 5:32 AM CDT | Severe Thunderstorm Warning | LSX | Greene, Jersey | 36 min |
| Apr 29, 7:54 AM CDT | Flash Flood Warning | LSX | Macoupin, Montgomery | 6 hr |
| Apr 29, 7:58 AM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 20 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 2012Severe Thunderstorm Warnings in Illinois, 2012Every severe thunderstorm warning 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.