Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 102, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 26, 2012, 12:18 AM CDT for Clinton County, Madison County, Illinois. It was in force for 42 min. 9 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 26, 2012, 12:18 AM CDT (05:18 UTC)
- Expired
- Apr 26, 2012, 1:00 AM CDT
- In force
- 42 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Clinton County, IL, Madison County, IL
The radar
The St Louis radar (KLSX), 111 km from the middle of the area, began a volume at 05:19 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 26, 12:25 AM CDT | HAIL 1.75 | 2 S Highland, IL | 1.0 INCH TO 1.75 INCH HAIL COVERED THE GROUND 2 MILES SOUTH OF HIGHLAND ILLINOIS. THE HAIL HAS COVERED THE GROUND AND A FOG BANK HAS DEVELOPED. |
| Apr 26, 12:30 AM CDT | HAIL 1 | 3 S Highland, IL | |
| Apr 26, 12:33 AM CDT | HAIL 0.75 | 2 S Highland, IL | |
| Apr 26, 12:35 AM CDT | HAIL 1.75 | Aviston, IL | COCORAHS |
| Apr 26, 12:39 AM CDT | HAIL 1.75 | Aviston, IL | |
| Apr 26, 12:40 AM CDT | HAIL 2 | Aviston, IL | CORRECTED FOR DATE TIME |
| Apr 26, 12:44 AM CDT | HAIL 1.75 | 1 E Breese, IL | |
| Apr 26, 12:53 AM CDT | HAIL 1.5 | Bartelso, IL | |
| Apr 26, 12:53 AM CDT | HAIL 1.75 | Bartelso, 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 25, 7:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 5.3 hours before the alert went out and 189 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.
396
WUUS53 KLSX 260518
SVRLSX
ILC027-119-260600-
/O.NEW.KLSX.SV.W.0102.120426T0518Z-120426T0600Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1218 AM CDT THU APR 26 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CLINTON COUNTY IN SOUTH CENTRAL ILLINOIS...
SOUTHEASTERN MADISON COUNTY IN SOUTHWEST ILLINOIS...
* UNTIL 100 AM CDT
* AT 1214 AM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM POCAHONTAS TO ST. JACOB...AND MOVING SOUTHEAST
AT 45 MPH.
HAZARD...QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS.
* LOCATIONS IMPACTED INCLUDE...
BREESE...CARLYLE...JAMESTOWN...ST. ROSE...AVISTON...BOULDER...
BECKEMEYER...GERMANTOWN...SHATTUC...STOLLETOWN...KEYESPORT...
HUEY...BARTELSO...FERRIN...POSEY AND HOFFMAN.
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 3850 8930 3852 8936 3850 8937 3849 8941
3850 8943 3848 8953 3865 8971 3866 8972
3874 8982 3874 8924 3865 8914 3851 8914
TIME...MOT...LOC 0518Z 318DEG 38KT 3881 8944 3870 8977
HAIL...1.00IN
WIND...<50 MPH
$$
CVKING4 follow-up statements
097
WWUS53 KLSX 260523
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1223 AM CDT THU APR 26 2012
ILC027-119-260600-
/O.CON.KLSX.SV.W.0102.000000T0000Z-120426T0600Z/
MADISON IL-CLINTON IL-
1223 AM CDT THU APR 26 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CLINTON AND
SOUTHEASTERN MADISON COUNTIES UNTIL 100 AM CDT...
AT 1219 AM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM POCAHONTAS TO ST. JACOB...AND MOVING SOUTHEAST AT
45 MPH.
HAZARD...GOLF BALL SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...DAMAGE TO VEHICLES...ROOFS AND WINDOWS.
LOCATIONS IMPACTED INCLUDE...
BREESE...CARLYLE...JAMESTOWN...ST. ROSE...AVISTON...BOULDER...
BECKEMEYER...GERMANTOWN...SHATTUC...STOLLETOWN...KEYESPORT...HUEY...
BARTELSO...FERRIN...POSEY AND HOFFMAN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND
LIGHTNING. SEEK SHELTER INSIDE A WELL-BUILT STRUCTURE. STAY AWAY FROM
WINDOWS.
&&
LAT...LON 3850 8930 3852 8936 3850 8937 3849 8941
3850 8943 3848 8953 3865 8971 3866 8972
3874 8982 3874 8924 3865 8914 3851 8914
TIME...MOT...LOC 0524Z 318DEG 38KT 3879 8942 3869 8975
HAIL...1.75IN
WIND...<50 MPH
$$
CVKING104
WWUS53 KLSX 260540
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1240 AM CDT THU APR 26 2012
ILC027-119-260600-
/O.CON.KLSX.SV.W.0102.000000T0000Z-120426T0600Z/
MADISON IL-CLINTON IL-
1240 AM CDT THU APR 26 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CLINTON AND
SOUTHEASTERN MADISON COUNTIES UNTIL 100 AM CDT...
AT 1239 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR BREESE...AND
MOVING SOUTHEAST AT 45 MPH.
HAZARD...GOLF BALL SIZE HAIL.
SOURCE...TRAINED WEATHER SPOTTERS. GOLF BALL SIZE HAIL HAS BEEN
REPORTED IN AVISTON.
IMPACT...DAMAGE TO VEHICLES...ROOFS AND WINDOWS.
LOCATIONS IMPACTED INCLUDE...
GERMANTOWN...BECKEMEYER...BARTELSO...POSEY AND HOFFMAN.
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 3851 8914 3850 8930 3851 8931 3851 8933
3852 8936 3850 8937 3849 8941 3850 8943
3848 8953 3866 8972 3871 8960
TIME...MOT...LOC 0540Z 318DEG 38KT 3860 8951
HAIL...1.75IN
WIND...<50 MPH
$$
CVKING425
WWUS53 KLSX 260547
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1247 AM CDT THU APR 26 2012
ILC119-260557-
/O.CAN.KLSX.SV.W.0102.000000T0000Z-120426T0600Z/
MADISON IL-
1247 AM CDT THU APR 26 2012
...THE SEVERE THUNDERSTORM WARNING FOR EXTREME SOUTHEASTERN MADISON
COUNTY IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 3851 8914 3850 8930 3851 8931 3851 8933
3852 8936 3850 8937 3849 8941 3850 8943
3848 8953 3858 8964 3865 8946
TIME...MOT...LOC 0547Z 318DEG 38KT 3854 8945
$$
ILC027-260600-
/O.CON.KLSX.SV.W.0102.000000T0000Z-120426T0600Z/
CLINTON IL-
1247 AM CDT THU APR 26 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
CLINTON COUNTY UNTIL 100 AM CDT...
AT 1244 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR GERMANTOWN...
AND MOVING SOUTHEAST AT 45 MPH.
HAZARD...GOLF BALL SIZE HAIL.
SOURCE...TRAINED WEATHER SPOTTERS REPORTED GOLF BALL SIZE HAIL IN
BREESE.
IMPACT...DAMAGE TO VEHICLES...ROOFS AND WINDOWS.
LOCATIONS IMPACTED INCLUDE...
POSEY AND HOFFMAN.
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 3851 8914 3850 8930 3851 8931 3851 8933
3852 8936 3850 8937 3849 8941 3850 8943
3848 8953 3858 8964 3865 8946
TIME...MOT...LOC 0547Z 318DEG 38KT 3854 8945
HAIL...1.75IN
WIND...<50 MPH
$$
CVKING814
WWUS53 KLSX 260559
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1259 AM CDT THU APR 26 2012
ILC027-260610-
/O.EXP.KLSX.SV.W.0102.000000T0000Z-120426T0600Z/
CLINTON IL-
1259 AM CDT THU APR 26 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN CLINTON COUNTY HAS
EXPIRED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 AM CDT.
LAT...LON 3851 8914 3850 8930 3851 8931 3851 8933
3852 8936 3850 8937 3849 8941 3850 8943
3848 8953 3858 8964 3865 8946
TIME...MOT...LOC 0600Z 318DEG 38KT 3844 8933
$$
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, 10:53 PM CDT | Severe Thunderstorm Warning | LSX | Greene, Jersey, Macoupin | 67 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, 12:45 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.