Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 98, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 25, 2012, 10:53 PM CDT for Greene County, Jersey County, Macoupin County, Illinois. It was in force for 67 min. 4 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 25, 2012, 10:53 PM CDT (03:53 UTC)
- Expired
- Apr 26, 2012, 12:00 AM CDT
- In force
- 67 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 50.0 mph
Counties Greene County, IL, Jersey County, IL, Macoupin County, IL
The radar
The St Louis radar (KLSX), 80 km from the middle of the area, began a volume at 03:55 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 25, 10:55 PM CDT | HAIL 0.75 | White Hall, IL | WIND GUSTS ESTIMATES OF 35 TO 45 MPH. SOME SMALL BRANCHES DOWN 1 INCH IN DIAMETER AND SMALLER |
| Apr 25, 11:15 PM CDT | HAIL 0.88 | Medora, IL | BEGAN AS 0.5 INCH...LASTED NEARLY 11 MINUTES...MAX HAIL SIZE 0.88 |
| Apr 25, 11:43 PM CDT | HAIL 1.75 | 1 W Bunker Hill, IL | |
| Apr 25, 11:51 PM CDT | HAIL 1.5 | Bunker Hill, IL | HAIL RANGEST FROM 1 TO 1.5 INCHES |
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 25, 7:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 3.9 hours before the alert went out and 161 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
- 1745 J/kg
- Mixed-layer CIN
- -108 J/kg
- Mixed-layer LCL
- 1353 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 261 m²/s²
- 0-3 km storm-relative helicity
- 449 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 4.2
The text
As transmitted, in the capitals the NWS used until 2016.
457
WUUS53 KLSX 260353
SVRLSX
ILC061-083-117-260500-
/O.NEW.KLSX.SV.W.0098.120426T0353Z-120426T0500Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1053 PM CDT WED APR 25 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
GREENE COUNTY IN SOUTHWEST ILLINOIS...
NORTHEASTERN JERSEY COUNTY IN SOUTHWEST ILLINOIS...
MACOUPIN COUNTY IN SOUTHWEST ILLINOIS...
* UNTIL MIDNIGHT CDT
* AT 1050 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR WHITE
HALL...AND MOVING SOUTHEAST AT 45 MPH.
HAZARD...GOLF BALL SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...DAMAGE TO VEHICLES...ROOFS AND WINDOWS.
* LOCATIONS IMPACTED INCLUDE...
CARLINVILLE...GILLESPIE...STAUNTON...ATHENSVILLE...GREENFIELD...
KEMPER...SHIPMAN...BUNKER HILL...WILSONVILLE...BENLD...MOUNT
OLIVE...ROCKBRIDGE...HETTICK...FIDELITY...MEDORA...CHESTERFIELD...
PIASA...PLAINVIEW...ROYAL LAKES AND STANDARD CITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3900 9000 3943 9051 3953 9034 3933 8970
3900 8970
TIME...MOT...LOC 0354Z 300DEG 41KT 3938 9028
HAIL...1.75IN
WIND...<50 MPH
$$
CVKING4 follow-up statements
612
WWUS53 KLSX 260406
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1106 PM CDT WED APR 25 2012
ILC061-083-117-260500-
/O.CON.KLSX.SV.W.0098.000000T0000Z-120426T0500Z/
JERSEY IL-MACOUPIN IL-GREENE IL-
1106 PM CDT WED APR 25 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
GREENE...MACOUPIN AND NORTHEASTERN JERSEY COUNTIES UNTIL MIDNIGHT
CDT...
AT 1104 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR GREENFIELD...
AND MOVING SOUTHEAST AT 45 MPH.
HAZARD...GOLF BALL SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...DAMAGE TO VEHICLES...ROOFS AND WINDOWS.
LOCATIONS IMPACTED INCLUDE...
CARLINVILLE...GILLESPIE...STAUNTON...KEMPER...SHIPMAN...BUNKER
HILL...WILSONVILLE...BENLD...MOUNT OLIVE...HETTICK...FIDELITY...
MEDORA...CHESTERFIELD...PIASA...PLAINVIEW...ROYAL LAKES...ATWATER...
PRUETT...DORCHESTER AND HORNSBY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND
LIGHTNING. SEEK SHELTER INSIDE A WELL-BUILT STRUCTURE. STAY AWAY FROM
WINDOWS.
&&
LAT...LON 3900 9000 3934 9040 3944 9026 3933 8970
3900 8970
TIME...MOT...LOC 0406Z 300DEG 41KT 3931 9013
HAIL...1.75IN
WIND...<50 MPH
$$
CVKING425
WWUS53 KLSX 260424
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1124 PM CDT WED APR 25 2012
ILC061-083-260434-
/O.CAN.KLSX.SV.W.0098.000000T0000Z-120426T0500Z/
JERSEY IL-GREENE IL-
1124 PM CDT WED APR 25 2012
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL GREENE AND
NORTHEASTERN JERSEY COUNTIES IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 3900 9000 3913 9015 3931 9014 3926 8971
3900 8970
TIME...MOT...LOC 0424Z 317DEG 31KT 3919 9009
$$
ILC117-260500-
/O.CON.KLSX.SV.W.0098.000000T0000Z-120426T0500Z/
MACOUPIN IL-
1124 PM CDT WED APR 25 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
MACOUPIN COUNTY UNTIL MIDNIGHT CDT...
AT 1123 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR KEMPER...AND
MOVING SOUTHEAST AT 35 MPH.
HAZARD...PING PONG BALL SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...DAMAGE TO VEHICLES...ROOFS AND WINDOWS.
LOCATIONS IMPACTED INCLUDE...
CARLINVILLE...GILLESPIE...STAUNTON...SHIPMAN...BUNKER HILL...
WILSONVILLE...BENLD...MOUNT OLIVE...PIASA...PLAINVIEW...ROYAL
LAKES...DORCHESTER...PRUETT...HORNSBY AND WHITE CITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND
LIGHTNING. SEEK SHELTER INSIDE A WELL-BUILT STRUCTURE. STAY AWAY FROM
WINDOWS.
&&
LAT...LON 3900 9000 3913 9015 3931 9014 3926 8971
3900 8970
TIME...MOT...LOC 0424Z 317DEG 31KT 3919 9009
HAIL...1.50IN
WIND...<50 MPH
$$
CVKING121
WWUS53 KLSX 260446
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1146 PM CDT WED APR 25 2012
ILC117-260500-
/O.CON.KLSX.SV.W.0098.000000T0000Z-120426T0500Z/
MACOUPIN IL-
1146 PM CDT WED APR 25 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
MACOUPIN COUNTY UNTIL MIDNIGHT CDT...
AT 1141 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR BUNKER
HILL...AND MOVING SOUTHEAST AT 35 MPH.
HAZARD...GOLF BALL SIZE HAIL.
SOURCE...TRAINED WEATHER SPOTTERS.
IMPACT...DAMAGE TO VEHICLES...ROOFS AND WINDOWS.
LOCATIONS IMPACTED INCLUDE...
GILLESPIE...STAUNTON...WILSONVILLE...BENLD...MOUNT OLIVE AND WHITE
CITY.
GOLF BALL SIZE HAIL WAS REPORTED IN WOODBURN AT 1140 PM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND
LIGHTNING. SEEK SHELTER INSIDE A WELL-BUILT STRUCTURE. STAY AWAY FROM
WINDOWS.
&&
LAT...LON 3900 9000 3900 9001 3913 9001 3913 8970
3900 8970
TIME...MOT...LOC 0445Z 317DEG 31KT 3906 8993
HAIL...1.75IN
WIND...<50 MPH
$$
CVKING443
WWUS53 KLSX 260456
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1156 PM CDT WED APR 25 2012
ILC117-260506-
/O.EXP.KLSX.SV.W.0098.000000T0000Z-120426T0500Z/
MACOUPIN IL-
1156 PM CDT WED APR 25 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MACOUPIN COUNTY
WILL EXPIRE AT MIDNIGHT CDT...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 3900 9000 3900 9001 3913 9001 3913 8970
3900 8970
TIME...MOT...LOC 0456Z 317DEG 31KT 3899 8985
$$
CVKINGThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 8:21 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 54 min |
| Apr 25, 9:13 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown, Pike | 62 min |
| Apr 25, 9:50 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 40 min |
| Apr 25, 10:21 PM CDT | Severe Thunderstorm Warning | LSX | Greene, Pike | 39 min |
| Apr 25, 11:38 PM CDT | Severe Thunderstorm Warning | LSX | Fayette | 37 min |
| Apr 25, 11:44 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Madison, Montgomery | 46 min |
| Apr 25, 11:55 PM CDT | Severe Thunderstorm Warning | LSX | Madison | 50 min |
| Apr 26, 12:18 AM CDT | Severe Thunderstorm Warning | LSX | Clinton, Madison | 42 min |
| Apr 26, 12:45 AM CDT | Severe Thunderstorm Warning | LSX | Washington | 45 min |
| Apr 26, 2:06 AM CDT | Severe Thunderstorm Warning | LSX | Fayette, Marion | 28 min |
Nearby
Severe 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.