Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 328, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Sep 25, 2012, 8:13 PM CDT for Madison County, Saint Clair County, Illinois; Saint Louis County, City of Saint Louis, Missouri. It was in force for 47 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
- Sep 25, 2012, 8:13 PM CDT (01:13 UTC)
- Expired
- Sep 25, 2012, 9:00 PM CDT
- In force
- 47 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Madison County, IL, Saint Clair County, IL, City of Saint Louis, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 43 km from the middle of the area, began a volume at 01:13 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 |
|---|---|---|---|
| Sep 25, 5:05 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 1.2 hours before the alert went out and 210 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
- 1015 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 957 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 145 m²/s²
- 0-3 km storm-relative helicity
- 222 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 5.3
The text
As transmitted, in the capitals the NWS used until 2016.
941
WUUS53 KLSX 260113
SVRLSX
ILC119-163-MOC189-510-260200-
/O.NEW.KLSX.SV.W.0328.120926T0113Z-120926T0200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
813 PM CDT TUE SEP 25 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHWESTERN MADISON COUNTY IN SOUTHWEST ILLINOIS...
NORTHWESTERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS...
EASTERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...
ST. LOUIS CITY IN EAST CENTRAL MISSOURI...
* UNTIL 900 PM CDT
* AT 808 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR OLIVETTE...
AND MOVING EAST AT 30 MPH.
HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.
SOURCE...TRAINED WEATHER SPOTTERS. DIME SIZE HAIL HAS BEEN
REPORTED IN OLIVETTE WITH THIS STORM.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.
* LOCATIONS IMPACTED INCLUDE...
UNIVERSITY CITY...BERKELEY...CLAYTON...MAPLEWOOD...BEL-RIDGE...
KINLOCH...COOL VALLEY...NORMANDY...LEMAY...FERGUSON...HILLSDALE...
NORTHWOODS...DELLWOOD...JENNINGS...BLACK JACK...ST. LOUIS...
BELLEFONTAINE NEIGHBORS...RIVERVIEW...SPANISH LAKE AND CAHOKIA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3852 9047 3877 9046 3883 9014 3880 9012
3884 9011 3889 8985 3853 8985
TIME...MOT...LOC 0113Z 267DEG 28KT 3867 9034
HAIL...1.00IN
WIND...60 MPH
$$
BRITT2 follow-up statements
262
WWUS53 KLSX 260136
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
836 PM CDT TUE SEP 25 2012
MOC189-510-260145-
/O.CAN.KLSX.SV.W.0328.000000T0000Z-120926T0200Z/
ST. LOUIS MO-ST. LOUIS CITY MO-
836 PM CDT TUE SEP 25 2012
...THE SEVERE THUNDERSTORM WARNING FOR ST. LOUIS CITY AND EASTERN ST.
LOUIS COUNTIES IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA. ADDITIONAL STRONG THUNDERSTORMS ARE POSSIBLE AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 11 PM CDT.
LAT...LON 3860 8985 3871 9015 3884 9011 3889 8985
TIME...MOT...LOC 0135Z 261DEG 35KT 3878 9002
$$
ILC119-163-260200-
/O.CON.KLSX.SV.W.0328.000000T0000Z-120926T0200Z/
MADISON IL-ST. CLAIR IL-
836 PM CDT TUE SEP 25 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL
ST. CLAIR AND CENTRAL MADISON COUNTIES UNTIL 900 PM CDT...
AT 831 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR PONTOON
BEACH...AND MOVING EAST AT 40 MPH.
HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.
SOURCE...RADAR INDICATED.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.
LOCATIONS IMPACTED INCLUDE...
GLEN CARBON...MARYVILLE...EDWARDSVILLE...TROY...KUHN AND FRUIT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3860 8985 3871 9015 3884 9011 3889 8985
TIME...MOT...LOC 0135Z 261DEG 35KT 3878 9002
HAIL...1.00IN
WIND...60 MPH
$$
BRITT243 WWUS53 KLSX 260154 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 854 PM CDT TUE SEP 25 2012 ILC119-163-260203- /O.EXP.KLSX.SV.W.0328.000000T0000Z-120926T0200Z/ MADISON IL-ST. CLAIR IL- 854 PM CDT TUE SEP 25 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL ST. CLAIR AND CENTRAL MADISON COUNTIES WILL EXPIRE AT 900 PM CDT... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 11 PM CDT. LAT...LON 3860 8985 3871 9015 3884 9011 3889 8985 TIME...MOT...LOC 0153Z 261DEG 35KT 3881 8980 $$ BRITT
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 25, 7:05 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 40 min |
| Sep 25, 7:29 PM CDT | Severe Thunderstorm Warning | LSX | Marion, Washington | 46 min |
| Sep 25, 8:11 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Madison, Saint Clair | 34 min |
| Sep 25, 8:38 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Fayette, Marion | 52 min |
| Sep 25, 8:59 PM CDT | Flash Flood Warning | LSX | Clinton, Washington | 6 hr |
| Sep 26, 3:01 AM CDT | Flash Flood Warning | LSX | Clinton, Marion, Washington | 6 hr |
| Sep 26, 9:08 AM CDT | Areal Flood Warning | LSX | Clinton, Marion, Washington | 12 hr |
| Sep 25, 7:41 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson, Saint Louis | 49 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2012Severe Thunderstorm Warnings in Missouri, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.