Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 252, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Aug 16, 2012, 4:07 PM CDT for Clinton County, Marion County, Illinois. It was in force for 53 min. 3 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
- Aug 16, 2012, 4:07 PM CDT (21:07 UTC)
- Expired
- Aug 16, 2012, 5:00 PM CDT
- In force
- 53 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Clinton County, IL, Marion County, IL
The radar
The St Louis radar (KLSX), 123 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, 4:22 PM CDT | HAIL 0.7 | New Baden, IL | |
| Aug 16, 4:26 PM CDT | TSTM WND DMG | 3 N Sandoval, IL | SHERIFF OFFICE IN SALEM RELAYED A REPORT OF A TREE LIMB DOWN ON A POWER LINE NEAR SANDOVAL. |
| Aug 16, 5:10 PM CDT | TSTM WND GST 58 | 3 Nw Walnut Hill, 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 |
|---|---|---|---|
| Aug 16, 1:05 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 9.1 hours before the alert went out and 184 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.
713
WUUS53 KLSX 162107
SVRLSX
ILC027-121-162200-
/O.NEW.KLSX.SV.W.0252.120816T2107Z-120816T2200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
407 PM CDT THU AUG 16 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CLINTON COUNTY IN SOUTH CENTRAL ILLINOIS...
MARION COUNTY IN SOUTH CENTRAL ILLINOIS...
* UNTIL 500 PM CDT
* AT 404 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM ALTAMONT TO TAMALCO TO HIGHLAND...AND MOVING
SOUTHEAST AT 30 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...
NEW BADEN...BREESE...CARLYLE...SALEM...CENTRALIA...AVISTON...NEW
MEMPHIS...ALBERS...GERMANTOWN...PATOKA...BOULDER...BECKEMEYER...
FAIRMAN...KINMUNDY...SHATTUC...SANDOVAL...ODIN...STEPHEN FORBES
STATE PARK...OMEGA AND CENTRAL CITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.
&&
LAT...LON 3847 8870 3847 8914 3850 8915 3852 8936
3849 8940 3850 8943 3847 8947 3848 8958
3844 8970 3865 8970 3865 8959 3864 8939
3874 8944 3874 8914 3883 8913 3882 8869
TIME...MOT...LOC 2106Z 295DEG 25KT 3907 8875 3882 8931
3868 8965
HAIL...1.00IN
WIND...60 MPH
$$
BRITT1 follow-up statement
266
WWUS53 KLSX 162137
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
437 PM CDT THU AUG 16 2012
ILC027-121-162200-
/O.CON.KLSX.SV.W.0252.000000T0000Z-120816T2200Z/
MARION IL-CLINTON IL-
437 PM CDT THU AUG 16 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CLINTON AND
MARION COUNTIES UNTIL 500 PM CDT...
AT 434 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM KINMUNDY TO CARLYLE TO OKAWVILLE...AND MOVING
EAST AT 40 MPH.
HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.
SOURCE...RADAR INDICATED.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.
LOCATIONS IMPACTED INCLUDE...
SALEM...CENTRALIA...KINMUNDY...FAIRMAN...SHATTUC...SANDOVAL...STEPHEN
FORBES STATE PARK...ODIN...OMEGA...CENTRAL CITY...HELM...HUEY...
POSEY...FERRIN...ALMA...HOFFMAN...TONTI...BRUBAKER...JUNCTION CITY
AND SELMAVILLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.
&&
LAT...LON 3847 8870 3847 8914 3850 8915 3852 8936
3849 8940 3850 8943 3847 8947 3848 8958
3844 8970 3865 8970 3865 8959 3864 8939
3874 8944 3874 8914 3883 8913 3882 8869
TIME...MOT...LOC 2136Z 280DEG 35KT 3878 8887 3864 8928
3847 8953
HAIL...1.00IN
WIND...60 MPH
$$
BRITTThe 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, 3:52 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Madison | 38 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.