Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 164, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 28, 2012, 11:42 PM CDT for Jersey County, Macoupin County, Illinois. It was in force for 33 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 28, 2012, 11:42 PM CDT (04:42 UTC)
- Expired
- May 29, 2012, 12:15 AM CDT
- In force
- 33 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Jersey County, IL, Macoupin County, IL
The radar
The St Louis radar (KLSX), 73 km from the middle of the area, began a volume at 04:43 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, 4.7 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
- 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.
751
WUUS53 KLSX 290442
SVRLSX
ILC083-117-290515-
/O.NEW.KLSX.SV.W.0164.120529T0442Z-120529T0515Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1142 PM CDT MON MAY 28 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EAST CENTRAL JERSEY COUNTY IN SOUTHWEST ILLINOIS...
SOUTHWESTERN MACOUPIN COUNTY IN SOUTHWEST ILLINOIS...
* UNTIL 1215 AM CDT
* AT 1139 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR BRIGHTON...
AND MOVING NORTHEAST AT 25 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...
SHIPMAN...MILES STATION...FIDELITY...PIASA...ROYAL LAKES...
PLAINVIEW AND DORCHESTER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3926 9000 3909 8985 3900 9022 3911 9026
TIME...MOT...LOC 0442Z 240DEG 23KT 3908 9013
HAIL...1.00IN
WIND...60 MPH
$$
MILLER2 follow-up statements
633
WWUS53 KLSX 290454
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1154 PM CDT MON MAY 28 2012
ILC083-290504-
/O.CAN.KLSX.SV.W.0164.000000T0000Z-120529T0515Z/
JERSEY IL-
1154 PM CDT MON MAY 28 2012
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL JERSEY COUNTY IS
CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 3909 8985 3905 9015 3915 9015 3926 9000
TIME...MOT...LOC 0454Z 240DEG 23KT 3912 9004
$$
ILC117-290515-
/O.CON.KLSX.SV.W.0164.000000T0000Z-120529T0515Z/
MACOUPIN IL-
1154 PM CDT MON MAY 28 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL
MACOUPIN COUNTY UNTIL 1215 AM CDT...
AT 1148 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR SHIPMAN...AND
MOVING NORTHEAST AT 25 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...
ROYAL LAKES AND PLAINVIEW.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3909 8985 3905 9015 3915 9015 3926 9000
TIME...MOT...LOC 0454Z 240DEG 23KT 3912 9004
HAIL...1.00IN
WIND...60 MPH
$$
MILLER976 WWUS53 KLSX 290514 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1214 AM CDT TUE MAY 29 2012 ILC117-290525- /O.EXP.KLSX.SV.W.0164.000000T0000Z-120529T0515Z/ MACOUPIN IL- 1214 AM CDT TUE MAY 29 2012 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MACOUPIN COUNTY HAS EXPIRED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. LAT...LON 3909 8985 3905 9015 3915 9015 3926 9000 TIME...MOT...LOC 0515Z 240DEG 23KT 3919 8989 $$ MILLER
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 1:56 AM CDT | Severe Thunderstorm Warning | LSX | Madison | 34 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.