Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 11, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jan 17, 2012, 5:14 AM CST for 4 counties in Illinois. It was in force for 46 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
- Jan 17, 2012, 5:14 AM CST (11:14 UTC)
- Expired
- Jan 17, 2012, 6:00 AM CST
- In force
- 46 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Bond County, IL, Clinton County, IL, Madison County, IL, Saint Clair County, IL
The radar
The St Louis radar (KLSX), 85 km from the middle of the area, began a volume at 11:14 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 |
|---|---|---|---|
| Jan 17, 5:24 AM CST | HAIL 0.25 | St. Jacob, IL | |
| Jan 17, 5:34 AM CST | HAIL 0.25 | 3 S Highland, 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 |
|---|---|---|---|
| Jan 16, 11:47 PM CST | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 11.2 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
- 2 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 748 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 431 m²/s²
- 0-3 km storm-relative helicity
- 500 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
910 WUUS53 KLSX 171114 SVRLSX ILC005-027-119-163-171200- /O.NEW.KLSX.SV.W.0011.120117T1114Z-120117T1200Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 514 AM CST TUE JAN 17 2012 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN BOND COUNTY IN SOUTH CENTRAL ILLINOIS... NORTHERN CLINTON COUNTY IN SOUTH CENTRAL ILLINOIS... SOUTHEASTERN MADISON COUNTY IN SOUTHWEST ILLINOIS... NORTHEASTERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS... * UNTIL 600 AM CST * AT 510 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR MARYVILLE...AND MOVING EAST AT 60 MPH. * LOCATIONS IMPACTED INCLUDE... HIGHLAND...GREENVILLE...ST. JACOB...MARINE...ST. ROSE... POCAHONTAS...JAMESTOWN...BEAVER CREEK...TAMALCO...GRANTFORK... PIERRON...STOLLETOWN...DUDLEYVILLE...SMITHBORO...KEYESPORT AND PLEASANT MOUND. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 3862 8999 3879 9002 3892 8926 3863 8924 TIME...MOT...LOC 1114Z 263DEG 51KT 3869 8987 WIND...HAIL 60MPH 1.00IN $$ TILLY
2 follow-up statements
357 WWUS53 KLSX 171135 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 535 AM CST TUE JAN 17 2012 ILC119-163-171145- /O.CAN.KLSX.SV.W.0011.000000T0000Z-120117T1200Z/ MADISON IL-ST. CLAIR IL- 535 AM CST TUE JAN 17 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ST. CLAIR AND SOUTHEASTERN MADISON COUNTIES IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM. LAT...LON 3863 8959 3882 8959 3892 8926 3863 8924 TIME...MOT...LOC 1135Z 262DEG 55KT 3873 8945 $$ ILC005-027-171200- /O.CON.KLSX.SV.W.0011.000000T0000Z-120117T1200Z/ BOND IL-CLINTON IL- 535 AM CST TUE JAN 17 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN CLINTON AND SOUTHERN BOND COUNTIES UNTIL 600 AM CST... AT 532 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR JAMESTOWN...OR 8 MILES NORTH OF BREESE...MOVING EAST AT 65 MPH. LOCATIONS IMPACTED INCLUDE... BEAVER CREEK...TAMALCO...DUDLEYVILLE...KEYESPORT AND PLEASANT MOUND. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 3863 8959 3882 8959 3892 8926 3863 8924 TIME...MOT...LOC 1135Z 262DEG 55KT 3873 8945 WIND...HAIL 60MPH 1.00IN $$ TILLY
130 WWUS53 KLSX 171159 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 559 AM CST TUE JAN 17 2012 ILC005-027-171208- /O.EXP.KLSX.SV.W.0011.000000T0000Z-120117T1200Z/ BOND IL-CLINTON IL- 559 AM CST TUE JAN 17 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CLINTON AND SOUTHERN BOND COUNTIES WILL BE ALLOWED TO EXPIRE AT 600 AM CST... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN PORTIONS OF CLINTON COUNTY UNTIL 630 AM. ADDITIONAL STRONG THUNDERSTORMS MAY BE POSSIBLE...AND A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM. TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN ST LOUIS. LAT...LON 3863 8959 3882 8959 3892 8926 3863 8924 TIME...MOT...LOC 1158Z 260DEG 53KT 3869 8908 $$ TILLY
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 16, 11:59 PM CST | Severe Thunderstorm Warning | LSX | Macoupin, Montgomery | 58 days |
| Jan 17, 1:23 AM CST | Severe Thunderstorm Warning | LSX | Calhoun | 37 min |
| Jan 17, 2:08 AM CST | Severe Thunderstorm Warning | LSX | Madison, Saint Clair | 37 min |
| Jan 17, 2:17 AM CST | Severe Thunderstorm Warning | LSX | Madison | 28 min |
| Jan 17, 2:35 AM CST | Tornado Warning | LSX | Monroe | 40 min |
| Jan 17, 2:38 AM CST | Severe Thunderstorm Warning | LSX | Clinton, Madison, Saint Clair | 52 min |
| Jan 17, 2:39 AM CST | Severe Thunderstorm Warning | LSX | Bond | 36 min |
| Jan 17, 3:07 AM CST | Tornado Warning | LSX | Clinton, Monroe, Saint Clair, Washington | 38 min |
| Jan 17, 3:23 AM CST | Severe Thunderstorm Warning | LSX | Clinton, Marion | 35 min |
| Jan 17, 3:46 AM CST | Tornado Warning | LSX | Clinton, Washington | 29 min |
| Jan 17, 4:34 AM CST | Areal Flood Advisory | LSX | Bond, Clinton, Fayette, Macoupin, Madison, Marion and 4 more | 60 days |
| Jan 17, 5:22 AM CST | Severe Thunderstorm Warning | LSX | Monroe, Randolph | 38 min |
| Jan 17, 5:47 AM CST | Severe Thunderstorm Warning | LSX | Clinton, Fayette, Marion | 43 min |
| Jan 17, 5:53 AM CST | Severe Thunderstorm Warning | LSX | Monroe, Randolph, Saint Clair, Washington | 52 min |
| Jan 17, 6:01 AM CST | Severe Thunderstorm Warning | LSX | Randolph | 44 min |
| Jan 17, 6:35 AM CST | Severe Thunderstorm Warning | LSX | Randolph | 25 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.