Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 144, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 29, 2012, 11:51 PM CDT for Calhoun County, Pike County, Illinois. It was in force for 39 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
- Apr 29, 2012, 11:51 PM CDT (04:51 UTC)
- Expired
- Apr 30, 2012, 12:30 AM CDT
- In force
- 39 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Calhoun County, IL, Pike County, IL
The radar
The St Louis radar (KLSX), 88 km from the middle of the area, began a volume at 04:53 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 00:00Z, 4.9 hours before the alert went out and 202 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
- 522 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 228 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
068
WUUS53 KLSX 300451
SVRLSX
ILC013-149-300530-
/O.NEW.KLSX.SV.W.0144.120430T0451Z-120430T0530Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1151 PM CDT SUN APR 29 2012
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN CALHOUN COUNTY IN SOUTHWEST ILLINOIS...
SOUTHERN PIKE COUNTY IN WEST CENTRAL ILLINOIS...
* UNTIL 1230 AM CDT
* AT 1149 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR PIKE...AND
MOVING NORTHEAST AT 40 MPH.
HAZARD...QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS.
* LOCATIONS IMPACTED INCLUDE...
PITTSFIELD...PLEASANT HILL...BELLEVIEW...SUMMER HILL...NEW
HARTFORD...MARTINSBURG...NEBO...INDEPENDENCE...BEECREEK...TIME...
PEARL...MILTON...DETROIT...BEDFORD...MONTEZUMA AND FLORENCE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND
LIGHTNING. SEEK SHELTER INSIDE A WELL-BUILT STRUCTURE. STAY AWAY FROM
WINDOWS.
&&
LAT...LON 3969 9063 3963 9060 3954 9057 3946 9061
3940 9061 3935 9062 3935 9086 3939 9093
3941 9095 3944 9103 3947 9106 3949 9106
3951 9108
TIME...MOT...LOC 0451Z 245DEG 36KT 3947 9094
HAIL...1.00IN
WIND...<50 MPH
$$
BRITT2 follow-up statements
962
WWUS53 KLSX 300502
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1202 AM CDT MON APR 30 2012
ILC013-149-300530-
/O.CON.KLSX.SV.W.0144.000000T0000Z-120430T0530Z/
PIKE IL-CALHOUN IL-
1202 AM CDT MON APR 30 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
CALHOUN COUNTY IN SOUTHWEST ILLINOIS...AND SOUTHEASTERN PIKE COUNTY
IN WEST CENTRAL ILLINOIS UNTIL 1230 AM CDT...
AT 1158 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR PLEASANT
HILL...AND MOVING NORTHEAST AT 40 MPH.
HAZARD...QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS.
LOCATIONS IMPACTED INCLUDE...
PITTSFIELD...INDEPENDENCE...BEECREEK...TIME...PEARL...MILTON...
DETROIT...BEDFORD...MONTEZUMA AND FLORENCE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND
LIGHTNING. SEEK SHELTER INSIDE A WELL-BUILT STRUCTURE. STAY AWAY FROM
WINDOWS.
&&
LAT...LON 3969 9063 3963 9060 3954 9057 3946 9061
3940 9061 3935 9062 3935 9086 3939 9093
3941 9095 3944 9103 3947 9106 3949 9106
3951 9108
TIME...MOT...LOC 0503Z 244DEG 35KT 3951 9082
HAIL...1.00IN
WIND...<50 MPH
$$
BRITT673
WWUS53 KLSX 300522
SVSLSX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1222 AM CDT MON APR 30 2012
ILC013-149-300531-
/O.EXP.KLSX.SV.W.0144.000000T0000Z-120430T0530Z/
PIKE IL-CALHOUN IL-
1222 AM CDT MON APR 30 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CALHOUN COUNTY IN
SOUTHWEST ILLINOIS...AND SOUTHEASTERN PIKE COUNTY IN WEST CENTRAL
ILLINOIS WILL EXPIRE AT 1230 AM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
HOWEVER HEAVY RAIN IS STILL POSSIBLE WITH THIS THUNDERSTORM.
LAT...LON 3969 9063 3963 9060 3954 9057 3946 9061
3940 9061 3935 9062 3935 9086 3939 9093
3941 9095 3944 9103 3947 9106 3949 9106
3951 9108
TIME...MOT...LOC 0521Z 244DEG 35KT 3959 9062
$$
BRITTThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 4:45 AM CDT | Flash Flood Warning | LSX | Macoupin, Montgomery | 6 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.