Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 39, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Mar 2, 2012, 11:41 AM CST for Marion County, Illinois. It was in force for 49 min. 6 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
- Mar 2, 2012, 11:41 AM CST (17:41 UTC)
- Expired
- Mar 2, 2012, 12:30 PM CST
- In force
- 49 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Marion County, IL
The radar
The Evansville,IN radar (KVWX), 108 km from the middle of the area, began a volume at 17:42 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 |
|---|---|---|---|
| Mar 2, 11:50 AM CST | HAIL 1.75 | Centralia, IL | |
| Mar 2, 11:54 AM CST | HAIL 1 | Centralia, IL | |
| Mar 2, 11:55 AM CST | TSTM WND GST 55 | 3 Nw Walnut Hill, IL | |
| Mar 2, 11:58 AM CST | HAIL 1.75 | 3 Ne Walnut Hill, IL | |
| Mar 2, 12:00 PM CST | HAIL 1 | 12 Sw Iuka, IL | |
| Mar 2, 12:02 PM CST | HAIL 1.75 | 3 Nw Kell, IL | REPORTED AT I57 AND ROUTE 161...RELAYED FROM WFO ILX |
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 |
|---|---|---|---|
| Mar 2, 5:52 AM CST | Severe Thunderstorm Watch | SPC | 6 hr |
| Mar 2, 9:54 AM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 5.7 hours before the alert went out and 172 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1770 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 76 m²/s²
- 0-3 km storm-relative helicity
- 163 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
418 WUUS53 KLSX 021741 SVRLSX ILC121-021830- /O.NEW.KLSX.SV.W.0039.120302T1741Z-120302T1830Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 1141 AM CST FRI MAR 2 2012 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... MARION COUNTY IN SOUTH CENTRAL ILLINOIS... * UNTIL 1230 PM CST * AT 1139 AM CST...TRAINED WEATHER SPOTTERS IN NEW MINDEN REPORTED A SEVERE THUNDERSTORM PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED 6 MILES WEST OF IRVINGTON...OR 9 MILES NORTHEAST OF NASHVILLE...AND MOVING EAST AT 50 MPH. * LOCATIONS IMPACTED INCLUDE... CENTRALIA...SALEM...CENTRAL CITY...SANDOVAL...FAIRMAN...ODIN... PATOKA...KINMUNDY...HELM...OMEGA...STEPHEN FORBES STATE PARK... JUNCTION CITY...WALNUT HILL...VERNON...SELMAVILLE...TONTI...KELL... CARTTER...ALMA AND BRUBAKER. PRECAUTIONARY/PREPAREDNESS ACTIONS... A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 3848 8870 3847 8914 3882 8913 3883 8870 TIME...MOT...LOC 1741Z 252DEG 45KT 3844 8923 WIND...HAIL <50MPH 1.00IN $$ MILLER
2 follow-up statements
911 WWUS53 KLSX 021804 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1204 PM CST FRI MAR 2 2012 ILC121-021830- /O.CON.KLSX.SV.W.0039.000000T0000Z-120302T1830Z/ MARION IL- 1204 PM CST FRI MAR 2 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN MARION COUNTY UNTIL 1230 PM CST... AT NOON CST...TRAINED WEATHER SPOTTERS REPORTED A SEVERE THUNDERSTORM PRODUCING GOLF BALL SIZE HAIL. THIS STORM WAS LOCATED 6 MILES SOUTHEAST OF SALEM...MOVING EAST AT 55 MPH. IN ADDITION...AT 1150 AM GOLF BALL SIZE HAIL WAS REPORTED IN CENTRALIA WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... HELM...OMEGA...STEPHEN FORBES STATE PARK...BRUBAKER AND IUKA. PRECAUTIONARY/PREPAREDNESS ACTIONS... A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 3868 8897 3883 8870 3848 8870 3847 8914 TIME...MOT...LOC 1803Z 250DEG 49KT 3856 8886 WIND...HAIL <50MPH 1.75IN $$ MILLER
244 WWUS53 KLSX 021825 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1225 PM CST FRI MAR 2 2012 ILC121-021835- /O.EXP.KLSX.SV.W.0039.000000T0000Z-120302T1830Z/ MARION IL- 1225 PM CST FRI MAR 2 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MARION COUNTY WILL EXPIRE AT 1230 PM CST... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF THE WARNED AREA. LAT...LON 3868 8897 3883 8870 3848 8870 3847 8914 TIME...MOT...LOC 1825Z 250DEG 49KT 3866 8850 $$ MILLER
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 2, 5:10 AM CST | Severe Thunderstorm Warning | LSX | Calhoun | 39 min |
| Mar 2, 5:56 AM CST | Severe Thunderstorm Warning | LSX | Calhoun, Jersey, Macoupin, Madison | 49 min |
| Mar 2, 6:36 AM CST | Severe Thunderstorm Warning | LSX | Bond, Fayette, Macoupin, Madison, Montgomery | 39 min |
| Mar 2, 7:07 AM CST | Severe Thunderstorm Warning | LSX | Calhoun, Pike | 30 min |
| Mar 2, 7:14 AM CST | Severe Thunderstorm Warning | LSX | Bond, Fayette, Montgomery | 25 min |
| Mar 2, 9:49 AM CST | Severe Thunderstorm Warning | LSX | Clinton, Madison, Saint Clair | 41 min |
| Mar 2, 10:10 AM CST | Severe Thunderstorm Warning | LSX | Bond, Clinton, Fayette | 50 min |
| Mar 2, 11:12 AM CST | Severe Thunderstorm Warning | LSX | Fayette, Marion | 16 min |
| Mar 2, 11:29 AM CST | Severe Thunderstorm Warning | LSX | Clinton, Randolph, Washington | 31 min |
| Mar 2, 1:59 PM CST | Wind Advisory | LSX | Bond, Calhoun, Clinton, Fayette, Greene, Jersey and 8 more | 4 hr |
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.