Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 333, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Oct 17, 2012, 5:23 PM CDT for 6 counties in Missouri; 7 counties in Illinois. It was in force for 52 min. 5 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
- Oct 17, 2012, 5:23 PM CDT (22:23 UTC)
- Expired
- Oct 17, 2012, 6:15 PM CDT
- In force
- 52 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Calhoun County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Monroe County, IL, Saint Clair County, IL, City of Saint Louis, MO, Jefferson County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO
The radar
The St Louis radar (KLSX), 27 km from the middle of the area, began a volume at 22:23 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 |
|---|---|---|---|
| Oct 17, 5:23 PM CDT | TSTM WND GST 60 | 3 Ssw Orchard Farms, MO | |
| Oct 17, 5:38 PM CDT | TSTM WND GST 62 | De Soto, MO | |
| Oct 17, 5:45 PM CDT | TSTM WND DMG | Bellefontaine Neighbors, MO | TREES DOWN WITH THE THUNDERSTORM LINE. |
| Oct 17, 5:45 PM CDT | HAIL 0.25 | 3 Se Hematite, MO | BRIEF PERIOD OF PEA SIZED HAIL AND WIND GUSTS ESTIMATED AROUND 45 TO 50 MPH |
| Oct 17, 5:55 PM CDT | TSTM WND DMG | Dupo, IL | POWER POLE AND WIRES DOWN |
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 |
|---|---|---|---|
| Oct 17, 1:58 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 10.4 hours before the alert went out and 235 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
- 1209 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 158 m²/s²
- 0-3 km storm-relative helicity
- 269 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
331
WUUS53 KLSX 172223
SVRLSX
ILC013-061-083-117-119-133-163-MOC099-183-186-187-189-510-172315-
/O.NEW.KLSX.SV.W.0333.121017T2223Z-121017T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
523 PM CDT WED OCT 17 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CALHOUN COUNTY IN SOUTHWEST ILLINOIS...
SOUTHERN GREENE COUNTY IN SOUTHWEST ILLINOIS...
JERSEY COUNTY IN SOUTHWEST ILLINOIS...
SOUTHWESTERN MACOUPIN COUNTY IN SOUTHWEST ILLINOIS...
WESTERN MADISON COUNTY IN SOUTHWEST ILLINOIS...
MONROE COUNTY IN SOUTHWEST ILLINOIS...
WESTERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS...
EASTERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...
NORTHEASTERN ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI...
NORTHWESTERN STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI...
EXTREME NORTHERN ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI...
EASTERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI...
ST. LOUIS CITY IN EAST CENTRAL MISSOURI...
* UNTIL 615 PM CDT
* AT 519 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM HARDIN TO ST. CHARLES TO CEDAR HILL TO 10 MILES
WEST OF BUNKER...AND MOVING EAST AT 50 MPH.
HAZARD...60 MPH WIND GUSTS.
SOURCE...TRAINED WEATHER SPOTTERS REPORTED DAMAGE WHEN THESE
STORMS MOVED THROUGH WARREN
COUNTY...FORISTELL...BLAND...AND OWENSVILLE.
IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
BROKEN.
* LOCATIONS IMPACTED INCLUDE...
VALLEY PARK...BRIDGETON...MURPHY...CREVE COEUR...DES PERES...
FENTON...FRONTENAC...ST. ANN...KIRKWOOD...HAZELWOOD...LAMBERT
FIELD...SUNSET HILLS...OLIVETTE...WARSON WOODS...WOODSON TERRACE...
OVERLAND...LADUE...GLENDALE...ANTONIA AND OAKLAND.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
INTENSE SQUALL LINES CAN SOMETIMES PRODUCE BRIEF TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. ALTHOUGH NOT IMMEDIATELY
LIKELY...IT IS BEST TO MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF A BUILDING. THIS STORM MAY CAUSE SERIOUS INJURY AND SIGNIFICANT
PROPERTY DAMAGE.
&&
LAT...LON 3807 9064 3851 9049 3900 9046 3901 9066
3925 9073 3926 9002 3875 8997 3831 9003
3801 9032 3800 9064
TIME...MOT...LOC 2223Z 275DEG 45KT 3911 9050 3880 9043
3838 9054 3744 9134
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60 MPH
$$
KANOFSKY3 follow-up statements
668
WWUS53 KLSX 172244
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
544 PM CDT WED OCT 17 2012
ILC013-172253-
/O.CAN.KLSX.SV.W.0333.000000T0000Z-121017T2315Z/
CALHOUN IL-
544 PM CDT WED OCT 17 2012
...THE SEVERE THUNDERSTORM WARNING FOR CALHOUN COUNTY IS CANCELLED...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE
WARNED AREA.
LAT...LON 3807 9064 3851 9049 3897 9046 3897 9045
3897 9046 3926 9051 3926 9002 3875 8997
3831 9003 3801 9032 3800 9064
TIME...MOT...LOC 2243Z 275DEG 45KT 3909 9018 3877 9011
3836 9022 3742 9103
$$
ILC061-083-117-119-133-163-MOC099-183-186-187-189-510-172315-
/O.CON.KLSX.SV.W.0333.000000T0000Z-121017T2315Z/
JERSEY IL-MACOUPIN IL-MADISON IL-MONROE IL-ST. CLAIR IL-GREENE IL-
JEFFERSON MO-ST. CHARLES MO-STE. GENEVIEVE MO-ST. FRANCOIS MO-
ST. LOUIS MO-ST. LOUIS CITY MO-
544 PM CDT WED OCT 17 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR ST. LOUIS
CITY...EASTERN ST. LOUIS...EXTREME NORTHERN ST. FRANCOIS...
NORTHWESTERN STE. GENEVIEVE...NORTHEASTERN ST. CHARLES...EASTERN
JEFFERSON...SOUTH CENTRAL GREENE...WESTERN ST. CLAIR...MONROE...
WESTERN MADISON...SOUTHWESTERN MACOUPIN AND JERSEY COUNTIES UNTIL 615
PM CDT...
AT 541 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM BRIGHTON TO SPANISH LAKE TO FOUNTAIN TO
REYNOLDS...AND MOVING EAST AT 50 MPH.
HAZARD...60 MPH WIND GUSTS.
SOURCE...TRAINED WEATHER SPOTTERS REPORTED 62 MPH WINDS IN DE SOTO.
IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
BROKEN.
LOCATIONS IMPACTED INCLUDE...
EAST ST. LOUIS...WOOD RIVER...WASHINGTON PARK...CENTREVILLE...
WATERLOO...PONTOON BEACH...BETHALTO...MILLSTADT...CASEYVILLE...
COLLINSVILLE...GLEN CARBON...FAIRVIEW HEIGHTS...BELLEVILLE...
BRIGHTON...HARTFORD...FAIRMONT CITY...ROXANA...SHIPMAN...NEW DESIGN
AND DORSEY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
INTENSE SQUALL LINES CAN SOMETIMES PRODUCE BRIEF TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. ALTHOUGH NOT IMMEDIATELY
LIKELY...IT IS BEST TO MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF A BUILDING. THIS STORM MAY CAUSE SERIOUS INJURY AND SIGNIFICANT
PROPERTY DAMAGE.
&&
LAT...LON 3807 9064 3851 9049 3897 9046 3897 9045
3897 9046 3926 9051 3926 9002 3875 8997
3831 9003 3801 9032 3800 9064
TIME...MOT...LOC 2243Z 275DEG 45KT 3909 9018 3877 9011
3836 9022 3742 9103
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60 MPH
$$
KANOFSKY676
WWUS53 KLSX 172255
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
555 PM CDT WED OCT 17 2012
ILC061-172305-
/O.CAN.KLSX.SV.W.0333.000000T0000Z-121017T2315Z/
GREENE IL-
555 PM CDT WED OCT 17 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL GREENE COUNTY IS
CANCELLED...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE
WARNED AREA.
LAT...LON 3827 9057 3866 9030 3885 9021 3903 9020
3923 9023 3923 9020 3926 9019 3926 9002
3875 8997 3831 9003 3801 9032 3800 9064
TIME...MOT...LOC 2255Z 263DEG 40KT 3930 9010 3894 9001
3853 9013 3789 9053
$$
ILC083-117-119-133-163-MOC099-183-186-187-189-510-172315-
/O.CON.KLSX.SV.W.0333.000000T0000Z-121017T2315Z/
JERSEY IL-MACOUPIN IL-MADISON IL-MONROE IL-ST. CLAIR IL-JEFFERSON MO-
ST. CHARLES MO-STE. GENEVIEVE MO-ST. FRANCOIS MO-ST. LOUIS MO-
ST. LOUIS CITY MO-
555 PM CDT WED OCT 17 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR ST. LOUIS
CITY...EASTERN ST. LOUIS...EXTREME NORTHERN ST. FRANCOIS...
NORTHWESTERN STE. GENEVIEVE...EXTREME NORTHEASTERN ST. CHARLES...
EASTERN JEFFERSON...WESTERN ST. CLAIR...MONROE...WESTERN MADISON...
SOUTHWESTERN MACOUPIN AND NORTHEASTERN JERSEY COUNTIES UNTIL 615 PM
CDT...
AT 553 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM 5 MILES SOUTHEAST OF GREENFIELD TO BETHALTO TO
CAHOKIA TO DESLOGE...AND MOVING EAST AT 45 MPH.
HAZARD...60 MPH WIND GUSTS.
SOURCE...TRAINED WEATHER SPOTTERS.
IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
BROKEN.
LOCATIONS IMPACTED INCLUDE...
WASHINGTON PARK...CENTREVILLE...PONTOON BEACH...CASEYVILLE...
MILLSTADT...WATERLOO...COLLINSVILLE...GLEN CARBON...FAIRVIEW
HEIGHTS...BELLEVILLE...SHIPMAN...DORSEY...NEW DESIGN...POAG...FOSTER
POND...MONROE CITY...CHESTERFIELD...MADONNAVILLE...CHALFIN BRIDGE AND
WARTBURG.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
INTENSE SQUALL LINES CAN SOMETIMES PRODUCE BRIEF TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. ALTHOUGH NOT IMMEDIATELY
LIKELY...IT IS BEST TO MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF A BUILDING. THIS STORM MAY CAUSE SERIOUS INJURY AND SIGNIFICANT
PROPERTY DAMAGE.
&&
LAT...LON 3827 9057 3866 9030 3885 9021 3903 9020
3923 9023 3923 9020 3926 9019 3926 9002
3875 8997 3831 9003 3801 9032 3800 9064
TIME...MOT...LOC 2255Z 263DEG 40KT 3930 9010 3894 9001
3853 9013 3789 9053
HAIL...<.75IN
WIND...60 MPH
$$
KANOFSKY434
WWUS53 KLSX 172310
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
610 PM CDT WED OCT 17 2012
ILC083-117-119-133-163-MOC099-183-186-187-189-510-172320-
/O.EXP.KLSX.SV.W.0333.000000T0000Z-121017T2315Z/
JERSEY IL-MACOUPIN IL-MADISON IL-MONROE IL-ST. CLAIR IL-JEFFERSON MO-
ST. CHARLES MO-STE. GENEVIEVE MO-ST. FRANCOIS MO-ST. LOUIS MO-
ST. LOUIS CITY MO-
610 PM CDT WED OCT 17 2012
...THE SEVERE THUNDERSTORM WARNING FOR ST. LOUIS CITY...EASTERN ST.
LOUIS...EXTREME NORTHERN ST. FRANCOIS...NORTHWESTERN STE.
GENEVIEVE...EXTREME NORTHEASTERN ST. CHARLES...EASTERN JEFFERSON...
WESTERN ST. CLAIR...MONROE...WESTERN MADISON...SOUTHWESTERN MACOUPIN
AND NORTHEASTERN JERSEY COUNTIES WILL EXPIRE AT 615 PM CDT...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY. HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THESE
THUNDERSTORMS.
IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 8 PM CDT.
LAT...LON 3827 9057 3866 9030 3885 9021 3903 9020
3923 9023 3923 9020 3926 9019 3926 9002
3875 8997 3831 9003 3801 9032 3800 9064
TIME...MOT...LOC 2310Z 263DEG 40KT 3931 8987 3895 8979
3854 8992 3790 9033
$$
KANOFSKYThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 17, 4:03 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Franklin, Gasconade, Montgomery, Osage, Warren | 42 min |
| Oct 17, 4:24 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Franklin, Saint Charles, Warren, Washington | 51 min |
| Oct 17, 4:54 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Franklin, Jefferson, Lincoln, Saint Charles, Saint Louis and 1 more | 51 min |
| Oct 17, 4:58 PM CDT | Tornado Warning | LSX | Lincoln, Saint Charles | 32 min |
| Oct 17, 5:06 PM CDT | Tornado Warning | LSX | Saint Charles | 24 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.