Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 165, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 29, 2012, 1:56 AM CDT for Madison County, Illinois. It was in force for 34 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
- May 29, 2012, 1:56 AM CDT (06:56 UTC)
- Expired
- May 29, 2012, 2:30 AM CDT
- In force
- 34 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Madison County, IL
The radar
The St Louis radar (KLSX), 70 km from the middle of the area, began a volume at 06:56 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 nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 6.9 hours before the alert went out and 191 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
- 434 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 2137 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 103 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
The text
As transmitted, in the capitals the NWS used until 2016.
811
WUUS53 KLSX 290656
SVRLSX
ILC119-290730-
/O.NEW.KLSX.SV.W.0165.120529T0656Z-120529T0730Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
156 AM CDT TUE MAY 29 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTH CENTRAL MADISON COUNTY IN SOUTHWEST ILLINOIS...
* UNTIL 230 AM CDT
* AT 151 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR
COLLINSVILLE...AND MOVING EAST AT 20 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...
TROY...ST. JACOB...MARINE AND KUHN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3885 8981 3866 8971 3866 9002 3873 9005
TIME...MOT...LOC 0657Z 253DEG 16KT 3870 8994
HAIL...1.00IN
WIND...60 MPH
$$
MILLER2 follow-up statements
211
WWUS53 KLSX 290718
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
218 AM CDT TUE MAY 29 2012
ILC119-290730-
/O.CON.KLSX.SV.W.0165.000000T0000Z-120529T0730Z/
MADISON IL-
218 AM CDT TUE MAY 29 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
MADISON COUNTY UNTIL 230 AM CDT...
AT 216 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR TROY...AND
MOVING EAST AT 20 MPH.
HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.
SOURCE...RADAR INDICATED.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.
LOCATIONS IMPACTED INCLUDE...
ST. JACOB AND MARINE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3866 8985 3877 8988 3885 8981 3866 8971
TIME...MOT...LOC 0718Z 253DEG 16KT 3873 8983
HAIL...1.00IN
WIND...60 MPH
$$
MILLER327 WWUS53 KLSX 290724 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 224 AM CDT TUE MAY 29 2012 ILC119-290735- /O.EXP.KLSX.SV.W.0165.000000T0000Z-120529T0730Z/ MADISON IL- 224 AM CDT TUE MAY 29 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MADISON COUNTY WILL EXPIRE AT 230 AM CDT... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. LAT...LON 3866 8985 3877 8988 3885 8981 3866 8971 TIME...MOT...LOC 0725Z 253DEG 16KT 3874 8979 $$ MILLER
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 11:42 PM CDT | Severe Thunderstorm Warning | LSX | Jersey, Macoupin | 33 min |
| May 29, 2:06 AM CDT | Severe Thunderstorm Warning | LSX | Fayette, Montgomery | 24 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.