Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 57, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Mar 15, 2012, 6:50 PM CDT for Greene County, Pike County, Illinois. It was in force for 29 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 15, 2012, 6:50 PM CDT (23:50 UTC)
- Expired
- Mar 15, 2012, 7:19 PM CDT
- In force
- 29 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Greene County, IL, Pike County, IL
The radar
The St Louis radar (KLSX), 91 km from the middle of the area, began a volume at 23:52 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, 11.8 hours before the alert went out and 182 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
- 1579 J/kg
- Mixed-layer CIN
- -52 J/kg
- Mixed-layer LCL
- 821 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
172
WUUS53 KLSX 152350
SVRLSX
ILC061-149-160030-
/O.NEW.KLSX.SV.W.0057.120315T2350Z-120316T0030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
650 PM CDT THU MAR 15 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHWESTERN GREENE COUNTY IN SOUTHWEST ILLINOIS...
SOUTHEASTERN PIKE COUNTY IN WEST CENTRAL ILLINOIS...
* UNTIL 730 PM CDT
* AT 647 PM CDT...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 10
MILES SOUTHEAST OF PITTSFIELD...AND MOVING NORTHEAST AT 40 MPH.
* LOCATIONS IMPACTED INCLUDE...
WHITE HALL...MILTON...HILLVIEW...BEDFORD...MONTEZUMA...PATTERSON
AND BARROW.
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 3954 9057 3953 9057 3952 9038 3943 9038
3944 9075 3953 9076 3960 9059
TIME...MOT...LOC 2351Z 233DEG 34KT 3952 9065
WIND...HAIL 60MPH 1.00IN
$$
MILLER2 follow-up statements
842 WWUS53 KLSX 160017 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 717 PM CDT THU MAR 15 2012 ILC149-160027- /O.CAN.KLSX.SV.W.0057.000000T0000Z-120316T0030Z/ PIKE IL- 717 PM CDT THU MAR 15 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PIKE COUNTY IN WEST CENTRAL ILLINOIS IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. LAT...LON 3945 9055 3953 9054 3952 9038 3943 9038 TIME...MOT...LOC 0017Z 280DEG 20KT 3949 9047 $$ ILC061-160030- /O.CON.KLSX.SV.W.0057.000000T0000Z-120316T0030Z/ GREENE IL- 717 PM CDT THU MAR 15 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL GREENE COUNTY UNTIL 730 PM CDT... AT 714 PM CDT...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 6 MILES SOUTHWEST OF ALSEY...OR 6 MILES NORTHWEST OF WHITE HALL...MOVING EAST AT 25 MPH. LOCATIONS IMPACTED INCLUDE... WHITE HALL AND BARROW. 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 3945 9055 3953 9054 3952 9038 3943 9038 TIME...MOT...LOC 0017Z 280DEG 20KT 3949 9047 WIND...HAIL 60MPH 1.00IN $$ MILLER
383 WWUS53 KLSX 160019 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 719 PM CDT THU MAR 15 2012 ILC061-160029- /O.CAN.KLSX.SV.W.0057.000000T0000Z-120316T0030Z/ GREENE IL- 719 PM CDT THU MAR 15 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL GREENE COUNTY IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED. LAT...LON 3945 9055 3953 9054 3952 9038 3943 9038 TIME...MOT...LOC 0019Z 278DEG 20KT 3949 9046 $$ MILLER
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 14, 7:00 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 45 min |
| Mar 14, 7:41 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 31 min |
| Mar 15, 4:12 PM CDT | Severe Thunderstorm Warning | LSX | Jersey, Madison | 33 min |
| Mar 15, 4:46 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 29 min |
| Mar 15, 5:17 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey | 43 min |
| Mar 15, 5:52 PM CDT | Severe Thunderstorm Warning | LSX | Greene | 38 min |
| Mar 15, 6:16 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin | 44 min |
| Mar 15, 6:58 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Montgomery | 15 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.