Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 336, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Oct 22, 2012, 7:43 AM CDT for Pike County, Illinois. It was in force for 47 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
- Oct 22, 2012, 7:43 AM CDT (12:43 UTC)
- Expired
- Oct 22, 2012, 8:30 AM CDT
- In force
- 47 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Pike County, IL
The radar
The St Louis radar (KLSX), 114 km from the middle of the area, began a volume at 12:46 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 nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 0.7 hours before the alert went out and 181 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
- 620 J/kg
- Mixed-layer CIN
- -91 J/kg
- Mixed-layer LCL
- 653 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 276 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
789
WUUS53 KLSX 221243
SVRLSX
ILC149-221330-
/O.NEW.KLSX.SV.W.0336.121022T1243Z-121022T1330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
743 AM CDT MON OCT 22 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EASTERN PIKE COUNTY IN WEST CENTRAL ILLINOIS...
* UNTIL 830 AM CDT
* AT 738 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR
PITTSFIELD...AND MOVING EAST AT 40 MPH.
HAZARD...QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS.
* LOCATIONS IMPACTED INCLUDE...
GRIGGSVILLE...TIME...PERRY...DETROIT...MILTON...MONTEZUMA...VALLEY
CITY...FLORENCE AND CHAMBERSBURG.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
&&
LAT...LON 3983 9056 3979 9059 3975 9061 3972 9064
3968 9063 3963 9060 3953 9058 3950 9090
3983 9091 3984 9057
TIME...MOT...LOC 1243Z 252DEG 33KT 3967 9080
HAIL...1.00IN
WIND...<50 MPH
$$
GLASS1 follow-up statement
482
WWUS53 KLSX 221326
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
826 AM CDT MON OCT 22 2012
ILC149-221335-
/O.EXP.KLSX.SV.W.0336.000000T0000Z-121022T1330Z/
PIKE IL-
826 AM CDT MON OCT 22 2012
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN PIKE COUNTY IN WEST
CENTRAL ILLINOIS WILL EXPIRE AT 830 AM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA. HOWEVER SMALL HAIL IS STILL POSSIBLE WITH THIS THUNDERSTORM.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.
LAT...LON 3983 9056 3979 9059 3975 9061 3972 9064
3968 9063 3963 9060 3953 9058 3950 9090
3983 9091 3984 9057
TIME...MOT...LOC 1325Z 252DEG 33KT 3979 9032
$$
BRITTThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 22, 6:20 AM CDT | Severe Thunderstorm Warning | LSX | Adams | 55 min |
| Oct 22, 6:56 AM CDT | Severe Thunderstorm Warning | LSX | Adams, Pike | 49 min |
| Oct 22, 9:30 AM CDT | Severe Thunderstorm Warning | LSX | Greene, Jersey, Macoupin | 45 min |
| Oct 22, 10:34 AM CDT | Severe Thunderstorm Warning | LSX | Madison | 41 min |
| Oct 22, 11:38 AM CDT | Severe Thunderstorm Warning | LSX | Clinton, Madison, Saint Clair | 37 min |
| Oct 22, 2:04 PM CDT | Severe Thunderstorm Warning | LSX | Madison, Saint Clair | 24 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.