Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 260, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Sep 5, 2012, 9:40 AM CDT for Fayette County, Illinois. It was in force for 50 min. 2 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
- Sep 5, 2012, 9:40 AM CDT (14:40 UTC)
- Expired
- Sep 5, 2012, 10:30 AM CDT
- In force
- 50 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Fayette County, IL
The radar
The Lincoln radar (KILX), 126 km from the middle of the area, began a volume at 14:42 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 |
|---|---|---|---|
| Sep 5, 9:42 AM CDT | TSTM WND DMG | 5 E Ramsey, IL | TREES AND POWER LINES DOWN BETWEEN RAMSEY AND WRIGHTS CORNER. |
| Sep 5, 9:55 AM CDT | TSTM WND DMG | 4 N St. Elmo, IL | POWER POLE DOWN NOT BLOCKING ROADWAY NORTH OF ST. ELMOS...CONFIRMED BY FIRE DEPARTMENT ON SCANNER. |
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 |
|---|---|---|---|
| Sep 5, 9:37 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 2.7 hours before the alert went out and 125 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
- 1271 J/kg
- Mixed-layer CIN
- -188 J/kg
- Mixed-layer LCL
- 1037 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
718
WUUS53 KLSX 051440
SVRLSX
ILC051-051530-
/O.NEW.KLSX.SV.W.0260.120905T1440Z-120905T1530Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
940 AM CDT WED SEP 5 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN FAYETTE COUNTY IN SOUTH CENTRAL ILLINOIS...
* UNTIL 1030 AM CDT
* AT 936 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 5 MILES SOUTHEAST
OF RAMSEY...AND MOVING EAST AT 40 MPH.
HAZARD...60 MPH WIND GUSTS.
SOURCE...TRAINED WEATHER SPOTTERS HAVE REPORTED WIDESPREAD WIND
DAMAGE WITH THIS STORM.
IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
BROKEN.
* LOCATIONS IMPACTED INCLUDE...
BROWNSTOWN...WRIGHTS CORNER...ST. ELMO...AVENA AND ST. JAMES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
THIS IS A DANGEROUS SITUATION. THIS STORM IS PRODUCING WIDESPREAD
WIND DAMAGE ACROSS PORTIONS OF MONTGOMERY AND FAYETTE COUNTIES. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 3892 8881 3902 8920 3922 8915 3922 8880
TIME...MOT...LOC 1439Z 292DEG 35KT 3910 8898
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60 MPH
$$
TILLY2 follow-up statements
846
WWUS53 KLSX 051507
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1007 AM CDT WED SEP 5 2012
ILC051-051530-
/O.CON.KLSX.SV.W.0260.000000T0000Z-120905T1530Z/
FAYETTE IL-
1007 AM CDT WED SEP 5 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL
FAYETTE COUNTY UNTIL 1030 AM CDT...
AT 1003 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ALTAMONT...
AND MOVING EAST AT 40 MPH.
HAZARD...60 MPH WIND GUSTS.
SOURCE...TRAINED WEATHER SPOTTERS HAVE REPORTED POWER POLES SNAPPED
JUST NORTH OF ST. ELMO.
IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
BROKEN.
LOCATIONS IMPACTED INCLUDE...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS SITUATION. THIS STORM IS PRODUCING WIDESPREAD
WIND DAMAGE. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS.
&&
LAT...LON 3892 8881 3900 8910 3919 8881
TIME...MOT...LOC 1506Z 288DEG 33KT 3902 8870
HAIL...<.75IN
WIND...60 MPH
$$
TILLY454 WWUS53 KLSX 051525 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1025 AM CDT WED SEP 5 2012 ILC051-051535- /O.EXP.KLSX.SV.W.0260.000000T0000Z-120905T1530Z/ FAYETTE IL- 1025 AM CDT WED SEP 5 2012 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL FAYETTE COUNTY WILL EXPIRE AT 1030 AM CDT... 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 500 PM. TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN ST LOUIS. LAT...LON 3892 8881 3900 8910 3919 8881 TIME...MOT...LOC 1525Z 291DEG 24KT 3896 8859 $$ TILLY
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 3:07 AM CDT | Heat Advisory | LSX | Madison, Monroe, Randolph, Saint Clair | 12 hr |
| Sep 5, 6:36 AM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown, Pike | 30 min |
| Sep 5, 7:56 AM CDT | Severe Thunderstorm Warning | LSX | Greene, Macoupin, Montgomery | 64 min |
| Sep 5, 8:38 AM CDT | Severe Thunderstorm Warning | LSX | Fayette, Montgomery | 37 min |
| Sep 5, 9:08 AM CDT | Tornado Warning | LSX | Fayette, Montgomery | 37 min |
| Sep 5, 10:00 AM CDT | Severe Thunderstorm Warning | LSX | Clinton, Fayette, Marion | 48 min |
| Sep 5, 10:23 AM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 32 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.