Alert archive / Illinois / Tornado Warnings in 2010
Tornado Warning 68, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Oct 26, 2010, 4:44 AM CDT for Saint Clair County, Illinois. It was in force for 23 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
- Oct 26, 2010, 4:44 AM CDT (09:44 UTC)
- Expired
- Oct 26, 2010, 5:07 AM CDT
- In force
- 23 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
County Saint Clair County, IL
The radar
The St Louis radar (KLSX), 76 km from the middle of the area, began a volume at 09:48 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 |
|---|---|---|---|
| Oct 26, 5:00 AM CDT | TSTM WND GST 58 | Freeburg, IL | |
| Oct 26, 5:04 AM CDT | TSTM WND GST 46 | Mascoutah, IL |
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 |
|---|---|---|---|
| Oct 25, 10:03 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 9.7 hours before the alert went out and 363 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
- 158 J/kg
- Mixed-layer CIN
- -132 J/kg
- Mixed-layer LCL
- 857 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 357 m²/s²
- 0-3 km storm-relative helicity
- 405 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 3.9
The text
As transmitted, in the capitals the NWS used until 2016.
438
WFUS53 KLSX 260944
TORLSX
ILC163-261015-
/O.NEW.KLSX.TO.W.0068.101026T0944Z-101026T1015Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
444 AM CDT TUE OCT 26 2010
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS...
* UNTIL 515 AM CDT
* AT 443 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR WATERLOO...AND MOVING EAST AT 45 MPH.
* LOCATIONS IMPACTED INCLUDE...
FREEBURG...MASCOUTAH...SMITHTON...FLORAVILLE...PADERBORN...
FAYETTEVILLE AND ST. LIBORY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT
WAS IN EFFECT FOR THE SAME AREA.
&&
LAT...LON 3834 8971 3831 8999 3831 9003 3833 9003
3836 9008 3841 9013 3859 8971 3849 8971
TIME...MOT...LOC 0945Z 248DEG 40KT 3834 9006
$$
BROWNING2 follow-up statements
365
WWUS53 KLSX 260955
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
455 AM CDT TUE OCT 26 2010
ILC163-261015-
/O.CON.KLSX.TO.W.0068.000000T0000Z-101026T1015Z/
ST. CLAIR IL-
455 AM CDT TUE OCT 26 2010
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN ST. CLAIR COUNTY
UNTIL 515 AM CDT...
AT 452 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR FREEBURG...MOVING EAST AT 60 MPH.
LOCATIONS IMPACTED INCLUDE...
MASCOUTAH...FAYETTEVILLE AND ST. LIBORY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.
&&
LAT...LON 3834 8971 3831 8999 3831 9003 3833 9003
3836 9008 3841 9013 3859 8971 3849 8971
TIME...MOT...LOC 0955Z 248DEG 50KT 3840 8987
$$
BROWNING693
WWUS53 KLSX 261007
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
507 AM CDT TUE OCT 26 2010
ILC163-261016-
/O.CAN.KLSX.TO.W.0068.000000T0000Z-101026T1015Z/
ST. CLAIR IL-
507 AM CDT TUE OCT 26 2010
...THE TORNADO WARNING FOR SOUTHERN ST. CLAIR COUNTY IS CANCELLED...
THE CIRCULATION WHICH PROMPTED THE WARNING HAS WEAKENED...HOWEVER A
SEVERE THUNDERSTORM WARNING IS STILL IN EFFECT.
LAT...LON 3834 8971 3831 8999 3831 9003 3833 9003
3836 9008 3841 9013 3859 8971 3849 8971
TIME...MOT...LOC 1006Z 239DEG 59KT 3849 8972
$$
BROWNINGThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 26, 12:56 AM CDT | Severe Thunderstorm Warning | LSX | Adams | 31 min |
| Oct 26, 1:13 AM CDT | Severe Thunderstorm Warning | LSX | Adams, Pike | 47 min |
| Oct 26, 1:19 AM CDT | Tornado Warning | LSX | Adams, Brown, Pike | 41 min |
| Oct 26, 1:39 AM CDT | Severe Thunderstorm Warning | LSX | Adams | 51 min |
| Oct 26, 1:56 AM CDT | Tornado Warning | LSX | Brown | 19 min |
| Oct 26, 3:34 AM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Jersey | 41 min |
| Oct 26, 3:34 AM CDT | Tornado Warning | LSX | Calhoun, Greene, Jersey, Pike | 41 min |
| Oct 26, 4:09 AM CDT | Severe Thunderstorm Warning | LSX | Greene, Jersey, Macoupin, Madison, Monroe, Randolph and 1 more | 66 min |
| Oct 26, 4:33 AM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Fayette, Macoupin, Madison, Marion and 2 more | 57 min |
| Oct 26, 5:15 AM CDT | Tornado Warning | LSX | Bond, Clinton, Fayette, Montgomery | 30 min |
| Oct 26, 5:19 AM CDT | Severe Thunderstorm Warning | LSX | Randolph | 23 min |
| Oct 26, 5:30 AM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Fayette, Marion, Montgomery, Washington | 45 min |
| Oct 26, 5:54 AM CDT | Tornado Warning | LSX | Fayette | 21 min |
| Oct 26, 6:03 AM CDT | Tornado Warning | LSX | Marion | 17 min |
Nearby
Tornado Warnings in Illinois, 2010Every tornado warning in 2010Tornadoes in 2010
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.