Alert archive / Illinois / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 85, NWS St. Louis, MO

March 30, 2012Marion County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Mar 30, 2012, 5:06 PM CDT for Marion County, Illinois. It was in force for 24 min. 3 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
Mar 30, 2012, 5:06 PM CDT (22:06 UTC)
Expired
Mar 30, 2012, 5:30 PM CDT
In force
24 min
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

County Marion County, IL

The radar

The Evansville,IN radar (KVWX), 112 km from the middle of the area, began a volume at 22:07 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

TimeReportWhereRemark
Mar 30, 5:10 PM CDTHAIL 12 Nnw Odin, ILPEA TO QUARTER SIZE HAIL
Mar 30, 5:11 PM CDTHAIL 12 Nnw Selmaville, IL
Mar 30, 5:11 PM CDTHAIL 12 Nw Selmaville, ILLOT OF HAIL AROUND QUARTER SIZE

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.

IssuedProductOfficeLasted
Mar 30, 2:51 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.1 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.

Skew-T log-pSkew-T log-p diagram, Lincoln, IL at 12:00Z on 2012-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 164 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2012-03-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 206 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
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

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

545 
WUUS53 KLSX 302206
SVRLSX
ILC121-302230-
/O.NEW.KLSX.SV.W.0085.120330T2206Z-120330T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
506 PM CDT FRI MAR 30 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL MARION COUNTY IN SOUTH CENTRAL ILLINOIS...

* UNTIL 530 PM CDT

* AT 503 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR ODIN...OR NEAR SALEM...AND MOVING EAST AT 15
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  SALEM...OMEGA...STEPHEN FORBES STATE PARK...SELMAVILLE...TONTI...
  BRUBAKER...CARTTER...ALMA AND IUKA.

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 3873 8875 3851 8877 3854 8915 3872 8913
TIME...MOT...LOC 2206Z 273DEG 11KT 3863 8902
WIND...HAIL <50MPH 1.00IN

$$

CARNEY
1 follow-up statement
018 
WWUS53 KLSX 302220
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
520 PM CDT FRI MAR 30 2012

ILC121-302230-
/O.CON.KLSX.SV.W.0085.000000T0000Z-120330T2230Z/
MARION IL-
520 PM CDT FRI MAR 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL MARION
COUNTY UNTIL 530 PM CDT...

AT 517 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS LOCATED
NEAR SALEM...MOVING EAST AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
  SALEM...OMEGA...STEPHEN FORBES STATE PARK...BRUBAKER...CARTTER...
  ALMA AND IUKA.

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 3873 8875 3851 8877 3854 8915 3872 8913
TIME...MOT...LOC 2220Z 273DEG 11KT 3863 8897
WIND...HAIL <50MPH 1.00IN

$$

CARNEY

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 30, 3:15 PM CDTSevere Thunderstorm WarningLSXClinton, Fayette, Marion30 min
Mar 30, 3:20 PM CDTSevere Thunderstorm WarningLSXFayette, Marion25 min
Mar 30, 3:45 PM CDTSevere Thunderstorm WarningLSXFayette, Marion30 min
Mar 30, 4:43 PM CDTSevere Thunderstorm WarningLSXClinton32 min
Mar 30, 5:15 PM CDTSevere Thunderstorm WarningLSXClinton15 min
Mar 30, 5:29 PM CDTSevere Thunderstorm WarningLSXClinton, Marion31 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.