Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 250, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Aug 16, 2012, 3:52 PM CDT for Bond County, Clinton County, Madison County, Illinois. It was in force for 38 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 16, 2012, 3:52 PM CDT (20:52 UTC)
- Expired
- Aug 16, 2012, 4:30 PM CDT
- In force
- 38 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 60.0 mph
Counties Bond County, IL, Clinton County, IL, Madison County, IL
The radar
The St Louis radar (KLSX), 91 km from the middle of the area, began a volume at 20:51 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 16, 4:00 PM CDT | TSTM WND DMG | Highland, IL | TREE SNAPPED BY HIGH WINDS...TIME ESTIMATED. ALSO STORM TOTAL RAINFALL OF 1.56 INCHES. |
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 |
|---|---|---|---|
| Aug 16, 1:05 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 8.9 hours before the alert went out and 173 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.
064
WUUS53 KLSX 162052
SVRLSX
ILC005-027-119-162130-
/O.NEW.KLSX.SV.W.0250.120816T2052Z-120816T2130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
352 PM CDT THU AUG 16 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHWESTERN BOND COUNTY IN SOUTH CENTRAL ILLINOIS...
NORTH CENTRAL CLINTON COUNTY IN SOUTH CENTRAL ILLINOIS...
SOUTHEASTERN MADISON COUNTY IN SOUTHWEST ILLINOIS...
* UNTIL 430 PM CDT
* AT 347 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR MARINE...AND
MOVING SOUTHEAST AT 35 MPH.
HAZARD...GOLF BALL SIZE HAIL AND 60 MPH WIND GUSTS.
SOURCE...TRAINED WEATHER SPOTTERS. AT 345 PM CDT...GOLFBALL SIZE
HAIL WAS REPORTED IN MARINE.
IMPACT...DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.
* LOCATIONS IMPACTED INCLUDE...
HIGHLAND...POCAHONTAS...JAMESTOWN...ST. ROSE...PIERRON AND
STOLLETOWN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3895 8954 3864 8940 3866 8986 3887 8987
TIME...MOT...LOC 2051Z 310DEG 30KT 3878 8968
HAIL...1.75IN
WIND...60 MPH
$$
BRITT2 follow-up statements
979
WWUS53 KLSX 162117
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
417 PM CDT THU AUG 16 2012
ILC005-027-119-162130-
/O.CON.KLSX.SV.W.0250.000000T0000Z-120816T2130Z/
MADISON IL-BOND IL-CLINTON IL-
417 PM CDT THU AUG 16 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
CLINTON...SOUTHWESTERN BOND AND SOUTHEASTERN MADISON COUNTIES UNTIL
430 PM CDT...
AT 413 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ST. ROSE...AND
MOVING SOUTHEAST AT 35 MPH.
HAZARD...GOLF BALL SIZE HAIL AND 60 MPH WIND GUSTS.
SOURCE...RADAR INDICATED.
IMPACT...DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE DAMAGE...
WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.
LOCATIONS IMPACTED INCLUDE...
STOLLETOWN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMAIN ALERT FOR A POSSIBLE TORNADO! TORNADOES CAN DEVELOP QUICKLY
FROM SEVERE THUNDERSTORMS. IF YOU SPOT A TORNADO GO AT ONCE INTO THE
BASEMENT OR SMALL CENTRAL ROOM IN A STURDY STRUCTURE.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3877 8967 3881 8948 3864 8940 3865 8970
TIME...MOT...LOC 2117Z 304DEG 29KT 3868 8951
TORNADO...POSSIBLE
HAIL...1.75IN
WIND...60 MPH
$$
BRITT187 WWUS53 KLSX 162129 RRA SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 429 PM CDT THU AUG 16 2012 ILC005-027-119-162137- /O.EXP.KLSX.SV.W.0250.000000T0000Z-120816T2130Z/ MADISON IL-BOND IL-CLINTON IL- 429 PM CDT THU AUG 16 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CLINTON... SOUTHWESTERN BOND AND SOUTHEASTERN MADISON COUNTIES WILL EXPIRE AT 430 PM CDT... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. HOWEVER...AN ADDITIONAL SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR MUCH OF THE REST OF CLINTON COUNTY UNTIL 5 PM CDT. ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 8 PM CDT. LAT...LON 3877 8967 3881 8948 3864 8940 3865 8970 TIME...MOT...LOC 2127Z 304DEG 29KT 3863 8942 $$ BRITT
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 2:11 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene | 39 min |
| 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, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.