Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 236, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Aug 8, 2012, 8:58 PM CDT for Jersey County, Macoupin County, Madison County, Illinois. It was in force for 47 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
- Aug 8, 2012, 8:58 PM CDT (01:58 UTC)
- Expired
- Aug 8, 2012, 9:45 PM CDT
- In force
- 47 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, Madison County, IL
The radar
The St Louis radar (KLSX), 54 km from the middle of the area, began a volume at 02:01 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 |
|---|---|---|---|
| Aug 8, 9:06 PM CDT | HAIL 0.25 | Jerseyville, 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, 2.0 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
- 296 J/kg
- Mixed-layer CIN
- -254 J/kg
- Mixed-layer LCL
- 1804 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
351
WUUS53 KLSX 090158
SVRLSX
ILC083-117-119-090245-
/O.NEW.KLSX.SV.W.0236.120809T0158Z-120809T0245Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
858 PM CDT WED AUG 8 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
JERSEY COUNTY IN SOUTHWEST ILLINOIS...
SOUTHWESTERN MACOUPIN COUNTY IN SOUTHWEST ILLINOIS...
NORTHWESTERN MADISON COUNTY IN SOUTHWEST ILLINOIS...
* UNTIL 945 PM CDT
* AT 857 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 6 MILES WEST OF
JERSEYVILLE...AND MOVING EAST AT 30 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...
JERSEYVILLE...GODFREY...BRIGHTON...SHIPMAN...BUNKER HILL...
DORSEY...OTTERVILLE...MCCLUSKY...DELHI...FIDELITY...MEDORA...
PIASA...MILES STATION...FOSTERBURG...ROYAL LAKES AND PLAINVIEW.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3891 8995 3899 9057 3902 9058 3919 9054
3918 9051 3916 9050 3918 9049 3918 9031
3919 9031 3917 8989
TIME...MOT...LOC 0159Z 276DEG 25KT 3910 9042
HAIL...1.00IN
WIND...60 MPH
$$
CARNEY2 follow-up statements
908
WWUS53 KLSX 090221
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
921 PM CDT WED AUG 8 2012
ILC083-117-119-090245-
/O.CON.KLSX.SV.W.0236.000000T0000Z-120809T0245Z/
JERSEY IL-MACOUPIN IL-MADISON IL-
921 PM CDT WED AUG 8 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
MADISON...SOUTHWESTERN MACOUPIN AND JERSEY COUNTIES UNTIL 945 PM
CDT...
AT 921 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR JERSEYVILLE...
AND MOVING EAST AT 30 MPH.
HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.
SOURCE...RADAR INDICATED.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.
LOCATIONS IMPACTED INCLUDE...
GODFREY...BRIGHTON...SHIPMAN...BUNKER HILL...DORSEY...DELHI...
FIDELITY...MEDORA...PIASA...MILES STATION...FOSTERBURG...ROYAL LAKES
AND PLAINVIEW.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3891 8995 3899 9057 3904 9058 3919 9054
3918 9051 3916 9050 3917 9048 3918 9049
3918 9031 3919 9031 3917 8989
TIME...MOT...LOC 0222Z 276DEG 25KT 3907 9026
HAIL...1.00IN
WIND...60 MPH
$$
CARNEY299
WWUS53 KLSX 090241
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
941 PM CDT WED AUG 8 2012
ILC083-117-119-090252-
/O.EXP.KLSX.SV.W.0236.000000T0000Z-120809T0245Z/
JERSEY IL-MACOUPIN IL-MADISON IL-
941 PM CDT WED AUG 8 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MADISON...
SOUTHWESTERN MACOUPIN AND JERSEY COUNTIES WILL EXPIRE AT 945 PM
CDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
HOWEVER GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.
LAT...LON 3891 8995 3899 9057 3904 9058 3919 9054
3918 9051 3916 9050 3917 9048 3918 9049
3918 9031 3919 9031 3917 8989
TIME...MOT...LOC 0242Z 276DEG 25KT 3905 9008
$$
CARNEYNearby
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.