Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 81, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Mar 30, 2012, 3:15 PM CDT for Clinton County, Fayette County, Marion County, Illinois. It was in force for 30 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
- Mar 30, 2012, 3:15 PM CDT (20:15 UTC)
- Expired
- Mar 30, 2012, 3:45 PM CDT
- In force
- 30 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Clinton County, IL, Fayette County, IL, Marion County, IL
The radar
The St Louis radar (KLSX), 125 km from the middle of the area, began a volume at 20:15 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 |
|---|---|---|---|
| Mar 30, 2:51 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 8.3 hours before the alert went out and 169 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
- 164 J/kg
- Mixed-layer CIN
- -244 J/kg
- Mixed-layer LCL
- 1045 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 206 m²/s²
- 0-3 km storm-relative helicity
- 230 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
605
WUUS53 KLSX 302015
SVRLSX
ILC027-051-121-302045-
/O.NEW.KLSX.SV.W.0081.120330T2015Z-120330T2045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
315 PM CDT FRI MAR 30 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN CLINTON COUNTY IN SOUTH CENTRAL ILLINOIS...
SOUTHWESTERN FAYETTE COUNTY IN SOUTH CENTRAL ILLINOIS...
NORTHWESTERN MARION COUNTY IN SOUTH CENTRAL ILLINOIS...
* UNTIL 345 PM CDT
* AT 311 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS
STORM WAS LOCATED 5 MILES NORTHEAST OF CARLYLE...AND MOVING EAST AT
20 MPH.
* LOCATIONS IMPACTED INCLUDE...
BOULDER...PATOKA...FAIRMAN...KEYESPORT AND VERNON.
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 8933 3873 8939 3874 8934 3874 8926
3877 8925 3884 8906 3865 8899
TIME...MOT...LOC 2016Z 253DEG 16KT 3868 8929
WIND...HAIL <50MPH 1.00IN
$$
CARNEY1 follow-up statement
381
WWUS53 KLSX 302026
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
326 PM CDT FRI MAR 30 2012
ILC027-051-121-302045-
/O.CON.KLSX.SV.W.0081.000000T0000Z-120330T2045Z/
MARION IL-FAYETTE IL-CLINTON IL-
326 PM CDT FRI MAR 30 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
CLINTON...SOUTHWESTERN FAYETTE AND NORTHWESTERN MARION COUNTIES UNTIL
345 PM CDT...
AT 325 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS
STORM WAS LOCATED NEAR BOULDER...OR 9 MILES NORTHEAST OF CARLYLE...
MOVING EAST AT 20 MPH.
LOCATIONS IMPACTED INCLUDE...
BOULDER...FAIRMAN...PATOKA AND VERNON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 3863 8933 3873 8939 3874 8934 3874 8926
3877 8925 3884 8906 3865 8899
TIME...MOT...LOC 2026Z 260DEG 16KT 3869 8922
WIND...HAIL <50MPH 1.00IN
$$
CARNEYThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 30, 3:20 PM CDT | Severe Thunderstorm Warning | LSX | Fayette, Marion | 25 min |
| Mar 30, 3:45 PM CDT | Severe Thunderstorm Warning | LSX | Fayette, Marion | 30 min |
| Mar 30, 4:43 PM CDT | Severe Thunderstorm Warning | LSX | Clinton | 32 min |
| Mar 30, 5:06 PM CDT | Severe Thunderstorm Warning | LSX | Marion | 24 min |
| Mar 30, 5:15 PM CDT | Severe Thunderstorm Warning | LSX | Clinton | 15 min |
| Mar 30, 5:29 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Marion | 31 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.