Alert archive / Illinois / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 37, NWS St. Louis, MO

March 2, 2012Fayette County, Marion County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Mar 2, 2012, 11:12 AM CST for Fayette County, Marion County, Illinois. It was in force for 16 min. 2 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, 11:12 AM CST (17:12 UTC)
Expired: Mar 2, 2012, 11:28 AM CST
In force: 16 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Fayette County, IL, Marion County, IL

The radar

The Evansville,IN radar (KVWX), 111 km from the middle of the area, began a volume at 17:15 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	Remark
Mar 2, 11:13 AM CST	HAIL 1	Farina, IL
Mar 2, 11:22 AM CST	HAIL 0.75	Kinmundy, 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
Mar 2, 9:54 AM CST	Tornado Watch PDS	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 5.2 hours before the alert went out and 151 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.

649 
WUUS53 KLSX 021712
SVRLSX
ILC051-121-021745-
/O.NEW.KLSX.SV.W.0037.120302T1712Z-120302T1745Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1112 AM CST FRI MAR 2 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 1145 AM CST

* AT 1109 AM CST...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
  NORTH OF SALEM...AND MOVING NORTHEAST AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  KINMUNDY...STEPHEN FORBES STATE PARK...FARINA...ST. PETER AND LA
  CLEDE.

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 3874 8869 3865 8898 3875 8906 3892 8876
      3892 8870 3891 8869
TIME...MOT...LOC 1712Z 244DEG 47KT 3873 8892
WIND...HAIL 60MPH 1.00IN

$$

CVKING

1 follow-up statement

574 
WWUS53 KLSX 021728
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1128 AM CST FRI MAR 2 2012

ILC051-121-021739-
/O.CAN.KLSX.SV.W.0037.000000T0000Z-120302T1745Z/
MARION IL-FAYETTE IL-
1128 AM CST FRI MAR 2 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN FAYETTE AND
NORTHERN MARION COUNTIES IS CANCELLED...

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

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 6 PM.

LAT...LON 3874 8869 3865 8898 3875 8906 3892 8876
      3892 8870 3891 8869
TIME...MOT...LOC 1729Z 244DEG 47KT 3883 8866

$$

CVKING

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, 7:14 AM CST	Severe Thunderstorm Warning	LSX	Bond, Fayette, Montgomery	25 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, 11:29 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.