Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 239, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Aug 16, 2012, 2:11 PM CDT for Calhoun County, Greene County, Illinois. It was in force for 39 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
- Aug 16, 2012, 2:11 PM CDT (19:11 UTC)
- Expired
- Aug 16, 2012, 2:50 PM CDT
- In force
- 39 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Calhoun County, IL, Greene County, IL
The radar
The St Louis radar (KLSX), 67 km from the middle of the area, began a volume at 19:13 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 16, 1:05 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 7.2 hours before the alert went out and 185 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
- 817 J/kg
- Mixed-layer CIN
- -262 J/kg
- Mixed-layer LCL
- 1559 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
958
WUUS53 KLSX 161911
SVRLSX
ILC013-061-162000-
/O.NEW.KLSX.SV.W.0239.120816T1911Z-120816T2000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
211 PM CDT THU AUG 16 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CALHOUN COUNTY IN SOUTHWEST ILLINOIS...
GREENE COUNTY IN SOUTHWEST ILLINOIS...
* UNTIL 300 PM CDT
* AT 209 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 10 MILES WEST OF
WHITE HALL...AND MOVING EAST AT 50 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...
WHITE HALL...CARROLLTON...OLD KANE...GREENFIELD...WALKERSVILLE...
WOODY...BELLTOWN...BERDAN...KANE...WRIGHTS AND ROCKBRIDGE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3943 9015 3927 9015 3926 9020 3923 9020
3922 9031 3918 9031 3918 9051 3919 9052
3919 9056 3918 9057 3919 9058 3918 9060
3929 9077 3940 9074 3940 9061 3944 9061
TIME...MOT...LOC 1912Z 278DEG 42KT 3938 9054
HAIL...1.00IN
WIND...60 MPH
$$
BRITT3 follow-up statements
219
WWUS53 KLSX 161926
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
226 PM CDT THU AUG 16 2012
ILC013-161935-
/O.CAN.KLSX.SV.W.0239.000000T0000Z-120816T2000Z/
CALHOUN IL-
226 PM CDT THU AUG 16 2012
...THE SEVERE THUNDERSTORM WARNING FOR CALHOUN COUNTY IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT THE WARNED AREA.
ADDITIONAL STRONG THUNDERSTORMS ARE POSSIBLE AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 8 PM CDT.
LAT...LON 3943 9015 3927 9015 3926 9020 3923 9020
3922 9031 3918 9031 3918 9051 3929 9060
3933 9062 3943 9054
TIME...MOT...LOC 1925Z 276DEG 32KT 3937 9040
$$
ILC061-162000-
/O.CON.KLSX.SV.W.0239.000000T0000Z-120816T2000Z/
GREENE IL-
226 PM CDT THU AUG 16 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR GREENE COUNTY
UNTIL 300 PM CDT...
AT 222 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR WHITE HALL...
AND MOVING EAST AT 35 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...
OLD KANE...GREENFIELD...KANE...WRIGHTS AND ROCKBRIDGE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3943 9015 3927 9015 3926 9020 3923 9020
3922 9031 3918 9031 3918 9051 3929 9060
3933 9062 3943 9054
TIME...MOT...LOC 1925Z 276DEG 32KT 3937 9040
HAIL...1.00IN
WIND...60 MPH
$$
BRITT471
WWUS53 KLSX 161936
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
236 PM CDT THU AUG 16 2012
ILC061-162000-
/O.CON.KLSX.SV.W.0239.000000T0000Z-120816T2000Z/
GREENE IL-
236 PM CDT THU AUG 16 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
GREENE COUNTY UNTIL 300 PM CDT...
AT 235 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR GREENFIELD...
AND MOVING EAST AT 40 MPH.
HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.
LOCATIONS IMPACTED INCLUDE...
GREENFIELD AND ROCKBRIDGE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3927 9015 3926 9020 3923 9020 3923 9021
3922 9031 3918 9031 3925 9046 3943 9039
3943 9015
TIME...MOT...LOC 1936Z 277DEG 34KT 3934 9025
HAIL...0.75IN
WIND...60 MPH
$$
BRITT869
WWUS53 KLSX 161950
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
250 PM CDT THU AUG 16 2012
ILC061-162000-
/O.CAN.KLSX.SV.W.0239.000000T0000Z-120816T2000Z/
GREENE IL-
250 PM CDT THU AUG 16 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GREENE COUNTY IS
CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.
ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 8 PM CDT.
LAT...LON 3927 9015 3926 9020 3923 9020 3923 9021
3922 9031 3918 9031 3925 9046 3943 9039
3943 9015
TIME...MOT...LOC 1950Z 277DEG 34KT 3932 9008
$$
BRITTThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 3:08 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Madison | 37 min |
| Aug 16, 3:18 PM CDT | Severe Thunderstorm Warning | LSX | Madison, Saint Clair | 42 min |
| Aug 16, 3:28 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 47 min |
| Aug 16, 3:43 PM CDT | Severe Thunderstorm Warning | LSX | Saint Clair | 47 min |
| Aug 16, 3:43 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Fayette, Montgomery | 47 min |
| Aug 16, 3:52 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Madison | 38 min |
| Aug 16, 4:07 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Marion | 53 min |
| Aug 16, 4:25 PM CDT | Severe Thunderstorm Warning | LSX | Fayette | 35 min |
| Aug 16, 4:26 PM CDT | Severe Thunderstorm Warning | LSX | Saint Clair | 24 min |
| Aug 16, 4:49 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Marion, Washington | 56 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.