Alert archive / Illinois / Tornado Warnings in 2012
Tornado Warning 21, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Sep 5, 2012, 9:08 AM CDT for Fayette County, Montgomery County, Illinois. It was in force for 37 min. 4 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, 9:08 AM CDT (14:08 UTC)
- Expired
- Sep 5, 2012, 9:45 AM CDT
- In force
- 37 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Fayette County, IL, Montgomery County, IL
The radar
The Lincoln radar (KILX), 106 km from the middle of the area, began a volume at 14:10 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, 9:16 AM CDT | TSTM WND DMG | Witt, IL | POWER LINES AND TREES REPORTED DOWN IN WITT... REPORTED ILLINOIS STATE DISTRICT 11. |
| Sep 5, 9:30 AM CDT | TSTM WND DMG | Ramsey, IL | A THIRD OF A MOBILE HOME ROOF RIPPED OFF AND A PINE TREE THROUGH ANOTHER HOUSE ROOF ON WEST WASHINGTON STREET. |
| Sep 5, 9:38 AM CDT | TSTM WND DMG | Ramsey, IL | HOMES DAMAGED DUE TO TREES FALLING ONTO HOUSES IN RAMSEY. |
| Sep 5, 9:42 AM CDT | TSTM WND DMG | 5 E Ramsey, IL | TREES AND POWER LINES DOWN BETWEEN RAMSEY AND WRIGHTS CORNER. |
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 12:00Z, 2.1 hours before the alert went out and 114 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.
808
WFUS53 KLSX 051408
TORLSX
ILC051-135-051445-
/O.NEW.KLSX.TO.W.0021.120905T1408Z-120905T1445Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
908 AM CDT WED SEP 5 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* TORNADO WARNING FOR...
NORTHWESTERN FAYETTE COUNTY IN SOUTH CENTRAL ILLINOIS...
EAST CENTRAL MONTGOMERY COUNTY IN SOUTH CENTRAL ILLINOIS...
* UNTIL 945 AM CDT
* AT 905 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
TORNADO WAS LOCATED NEAR WITT...AND MOVING EAST AT 20 MPH.
HAZARD...DEVELOPING TORNADO.
SOURCE...RADAR INDICATED ROTATION.
IMPACT...SIGNIFICANT HOUSE AND BUILDING DAMAGE POSSIBLE. MOBILE
HOMES COMPLETELY DESTROYED IF HIT. SOME TREES UPROOTED OR
SNAPPED. VEHICLES WILL LIKELY BE THROWN BY TORNADIC WINDS.
* LOCATIONS IMPACTED INCLUDE...
RAMSEY AND BAYLE CITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT
WAS IN EFFECT FOR THE SAME AREA.
&&
LAT...LON 3907 8898 3916 8939 3933 8935 3931 8914
3931 8913 3922 8913 3922 8894
TIME...MOT...LOC 1408Z 282DEG 16KT 3923 8925
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
BROWNING2 follow-up statements
679
WWUS53 KLSX 051421
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
921 AM CDT WED SEP 5 2012
ILC051-135-051445-
/O.CON.KLSX.TO.W.0021.000000T0000Z-120905T1445Z/
MONTGOMERY IL-FAYETTE IL-
921 AM CDT WED SEP 5 2012
...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN FAYETTE AND
EAST CENTRAL MONTGOMERY COUNTIES UNTIL 945 AM CDT...
AT 919 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 7 MILES NORTHWEST OF RAMSEY...AND MOVING EAST AT 20 MPH.
HAZARD...DEVELOPING TORNADO.
SOURCE...RADAR INDICATED ROTATION. THE PUBLIC REPORTED TREES AND
POWERLINES DOWN NEAR WITT AS THE STORM PASSED.
IMPACT...SIGNIFICANT HOUSE AND BUILDING DAMAGE POSSIBLE. MOBILE HOMES
COMPLETELY DESTROYED IF HIT. SOME TREES UPROOTED OR SNAPPED.
VEHICLES WILL LIKELY BE THROWN BY TORNADIC WINDS.
LOCATIONS IMPACTED INCLUDE...
RAMSEY AND BAYLE CITY.
LAT...LON 3907 8898 3916 8939 3933 8935 3931 8914
3931 8913 3922 8913 3922 8894
TIME...MOT...LOC 1420Z 282DEG 16KT 3922 8918
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
BROWNING988
WWUS53 KLSX 051442
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
942 AM CDT WED SEP 5 2012
ILC051-135-051448-
/O.EXP.KLSX.TO.W.0021.000000T0000Z-120905T1445Z/
MONTGOMERY IL-FAYETTE IL-
942 AM CDT WED SEP 5 2012
...THE TORNADO WARNING FOR NORTHWESTERN FAYETTE AND EAST CENTRAL
MONTGOMERY COUNTIES WILL EXPIRE AT 945 AM CDT...
THE CIRCULATION WHICH PROMPTED THE WARNING HAS WEAKENED...HOWEVER
A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR A PORTION OF THE
AREA.
LAT...LON 3907 8898 3916 8939 3933 8935 3931 8914
3931 8913 3922 8913 3922 8894
TIME...MOT...LOC 1438Z 282DEG 16KT 3920 8908
$$
BROWNINGThe 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, 9:40 AM CDT | Severe Thunderstorm Warning | LSX | Fayette | 50 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
Tornado Warnings in Illinois, 2012Every tornado warning in 2012Tornadoes 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.