Alert archive / Illinois / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 34, NWS St. Louis, MO

March 2, 2012Bond County, Fayette County, Montgomery County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Mar 2, 2012, 7:14 AM CST for Bond County, Fayette County, Montgomery County, Illinois. It was in force for 25 min. 6 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 2, 2012, 7:14 AM CST (13:14 UTC)
Expired: Mar 2, 2012, 7:39 AM CST
In force: 25 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Bond County, IL, Fayette County, IL, Montgomery County, IL

The radar

The Lincoln radar (KILX), 120 km from the middle of the area, began a volume at 13:15 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.

What was reported inside it

Time	Report	Where
Mar 2, 7:22 AM CST	HAIL 1	4 Nw Ramsey, IL
Mar 2, 7:25 AM CST	HAIL 1	Ramsey, IL
Mar 2, 7:28 AM CST	HAIL 0.7	Ramsey, IL
Mar 2, 7:32 AM CST	HAIL 1.75	Ramsey, IL
Mar 2, 7:44 AM CST	HAIL 1.75	2 S Herrick, IL
Mar 2, 7:44 AM CST	HAIL 1.75	7 Ene Ramsey, IL

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.

Issued	Product	Office	Lasted
Mar 2, 5:52 AM CST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 1.2 hours before the alert went out and 126 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1770 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 163 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.

459 
WUUS53 KLSX 021314
SVRLSX
ILC005-051-135-021345-
/O.NEW.KLSX.SV.W.0034.120302T1314Z-120302T1345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
714 AM CST FRI MAR 2 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN BOND COUNTY IN SOUTH CENTRAL ILLINOIS...
  FAYETTE COUNTY IN SOUTH CENTRAL ILLINOIS...
  SOUTHEASTERN MONTGOMERY COUNTY IN SOUTH CENTRAL ILLINOIS...

* UNTIL 745 AM CST

* AT 712 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR VAN BURENSBURG...OR 11 MILES NORTHWEST OF
  VANDALIA...AND MOVING EAST AT 65 MPH.

* LOCATIONS IMPACTED INCLUDE...
  VANDALIA...RAMSEY...BROWNSTOWN...ST. ELMO...WRIGHTS CORNER...BAYLE
  CITY AND AVENA.

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 3884 8937 3911 8949 3930 8914 3922 8913
      3922 8881 3921 8880 3896 8880
TIME...MOT...LOC 1314Z 250DEG 55KT 3910 8920
WIND...HAIL <50MPH 1.00IN

$$

KANOFSKY

2 follow-up statements

825 
WWUS53 KLSX 021323
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
723 AM CST FRI MAR 2 2012

ILC005-021333-
/O.CAN.KLSX.SV.W.0034.000000T0000Z-120302T1345Z/
BOND IL-
723 AM CST FRI MAR 2 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BOND COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 3887 8924 3923 8926 3930 8914 3922 8913
      3922 8881 3921 8880 3896 8880
TIME...MOT...LOC 1323Z 250DEG 55KT 3914 8903

$$

ILC051-135-021345-
/O.CON.KLSX.SV.W.0034.000000T0000Z-120302T1345Z/
MONTGOMERY IL-FAYETTE IL-
723 AM CST FRI MAR 2 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR FAYETTE AND
SOUTHEASTERN MONTGOMERY COUNTIES UNTIL 745 AM CST...

AT 720 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED NEAR RAMSEY...OR 10 MILES NORTH OF VANDALIA...
MOVING EAST AT 65 MPH.

IN ADDITION...QUARTER SIZE HAIL WAS REPORTED NORTH OF RAMSEY WITH 
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  ST. ELMO...WRIGHTS CORNER...AVENA AND ST. JAMES.

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 3887 8924 3923 8926 3930 8914 3922 8913
      3922 8881 3921 8880 3896 8880
TIME...MOT...LOC 1323Z 250DEG 55KT 3914 8903
WIND...HAIL <50MPH 1.00IN

$$

KANOFSKY

342 
WWUS53 KLSX 021339
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
739 AM CST FRI MAR 2 2012

ILC051-135-021348-
/O.CAN.KLSX.SV.W.0034.000000T0000Z-120302T1345Z/
MONTGOMERY IL-FAYETTE IL-
739 AM CST FRI MAR 2 2012

...THE SEVERE THUNDERSTORM WARNING FOR FAYETTE AND EAST CENTRAL
MONTGOMERY COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 AM.

LAT...LON 3887 8924 3923 8926 3930 8914 3922 8913
      3922 8881 3921 8880 3896 8880
TIME...MOT...LOC 1338Z 250DEG 55KT 3921 8875

$$

KANOFSKY

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 2, 5:10 AM CST	Severe Thunderstorm Warning	LSX	Calhoun	39 min
Mar 2, 5:56 AM CST	Severe Thunderstorm Warning	LSX	Calhoun, Jersey, Macoupin, Madison	49 min
Mar 2, 6:36 AM CST	Severe Thunderstorm Warning	LSX	Bond, Fayette, Macoupin, Madison, Montgomery	39 min
Mar 2, 7:07 AM CST	Severe Thunderstorm Warning	LSX	Calhoun, Pike	30 min
Mar 2, 9:49 AM CST	Severe Thunderstorm Warning	LSX	Clinton, Madison, Saint Clair	41 min
Mar 2, 10:10 AM CST	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette	50 min
Mar 2, 11:12 AM CST	Severe Thunderstorm Warning	LSX	Fayette, Marion	16 min
Mar 2, 11:29 AM CST	Severe Thunderstorm Warning	LSX	Clinton, Randolph, Washington	31 min
Mar 2, 11:41 AM CST	Severe Thunderstorm Warning	LSX	Marion	49 min
Mar 2, 1:59 PM CST	Wind Advisory	LSX	Bond, Calhoun, Clinton, Fayette, Greene, Jersey and 8 more	4 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 2012 Every 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.