Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 151, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 4, 2012, 10:18 PM CDT for Bond County, Madison County, Illinois. It was in force for 42 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
- May 4, 2012, 10:18 PM CDT (03:18 UTC)
- Expired
- May 4, 2012, 11:00 PM CDT
- In force
- 42 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Bond County, IL, Madison County, IL
The radar
The St Louis radar (KLSX), 88 km from the middle of the area, began a volume at 03:19 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 |
|---|---|---|---|
| May 4, 10:22 PM CDT | HAIL 0.75 | 1 Se Carpenter, IL |
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, 3.3 hours before the alert went out and 168 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
- 188 J/kg
- Mixed-layer CIN
- -108 J/kg
- Mixed-layer LCL
- 1330 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 155 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
887 WUUS53 KLSX 050318 SVRLSX ILC005-119-050400- /O.NEW.KLSX.SV.W.0151.120505T0318Z-120505T0400Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 1018 PM CDT FRI MAY 4 2012 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN BOND COUNTY IN SOUTH CENTRAL ILLINOIS... NORTHEASTERN MADISON COUNTY IN SOUTHWEST ILLINOIS... * UNTIL 1100 PM CDT * AT 1014 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR CARPENTER...AND MOVING EAST AT 20 MPH. HAZARD...QUARTER SIZE HAIL. SOURCE...RADAR INDICATED. IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. * LOCATIONS IMPACTED INCLUDE... WORDEN...MARINE...LIVINGSTON...ALHAMBRA...POCAHONTAS...RENO... HAMEL...KAUFMAN...GRANTFORK...NEW DOUGLAS...SHILOH HILL...OLD RIPLEY AND PIERRON. PRECAUTIONARY/PREPAREDNESS ACTIONS... FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A BUILDING. && LAT...LON 3901 8952 3875 8953 3878 8995 3896 8996 TIME...MOT...LOC 0318Z 269DEG 16KT 3888 8987 HAIL...1.00IN WIND...<50 MPH $$ GLASS
2 follow-up statements
090 WWUS53 KLSX 050335 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1035 PM CDT FRI MAY 4 2012 ILC005-119-050400- /O.CON.KLSX.SV.W.0151.000000T0000Z-120505T0400Z/ MADISON IL-BOND IL- 1035 PM CDT FRI MAY 4 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN BOND AND NORTHEASTERN MADISON COUNTIES UNTIL 1100 PM CDT... AT 1033 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ALHAMBRA... AND MOVING EAST AT 20 MPH. HAZARD...QUARTER SIZE HAIL. SOURCE...RADAR INDICATED. IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. LOCATIONS IMPACTED INCLUDE... LIVINGSTON...ALHAMBRA...POCAHONTAS...SORENTO...GRANTFORK...NEW DOUGLAS...SHILOH HILL...OLD RIPLEY AND PIERRON. PRECAUTIONARY/PREPAREDNESS ACTIONS... FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A BUILDING. && LAT...LON 3875 8953 3878 8988 3897 8986 3901 8952 TIME...MOT...LOC 0335Z 269DEG 16KT 3888 8977 HAIL...1.00IN WIND...<50 MPH $$ GLASS
721 WWUS53 KLSX 050355 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1055 PM CDT FRI MAY 4 2012 ILC005-119-050405- /O.EXP.KLSX.SV.W.0151.000000T0000Z-120505T0400Z/ MADISON IL-BOND IL- 1055 PM CDT FRI MAY 4 2012 ...THE SEVERE THUNDERSTORM WARNING FOR WESTERN BOND AND NORTHEASTERN MADISON COUNTIES WILL EXPIRE AT 1100 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 500 AM. LAT...LON 3875 8953 3878 8988 3897 8986 3901 8952 TIME...MOT...LOC 0355Z 269DEG 16KT 3888 8966 $$ GLASS
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.