Alert archive / Illinois / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 252, NWS St. Louis, MO

May 2, 2006Clinton County, Saint Clair County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at May 2, 2006, 12:12 AM CDT for Clinton County, Saint Clair County, Illinois. It was in force for 48 min. 1 report 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: May 2, 2006, 12:12 AM CDT (05:12 UTC)
Expired: May 2, 2006, 1:00 AM CDT
In force: 48 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

Counties Clinton County, IL, Saint Clair County, IL

The radar

The St Louis radar (KLSX), 78 km from the middle of the area, began a volume at 05:14 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
May 2, 12:26 AM CDT	HAIL 1	2 S Belleville, IL	NICKEL TO QUARTER SIZE HAIL REPORTED ON ROUTE 158

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
May 1, 11:28 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 5.2 hours before the alert went out and 203 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: 498 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 668 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 157 m²/s²
0-3 km storm-relative helicity: 249 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLSX 020512
SVRLSX
ILC027-163-020600-
/O.NEW.KLSX.SV.W.0252.060502T0512Z-060502T0600Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1212 AM CDT TUE MAY 2 2006

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLINTON COUNTY IN SOUTH CENTRAL ILLINOIS
  NORTHERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS

* UNTIL 100 AM CDT

* AT 1209 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  SWANSEA...AND MOVING EAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MASCOUTAH...
  NEW BADEN...
  ALBERS...
  GERMANTOWN...
  BECKEMEYER...
  CARLYLE...
  SHATTUC...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
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 3865 9011 3853 9019 3839 9011 3851 8915
      3872 8914

$$

GKS

1 follow-up statement

000 
WWUS53 KLSX 020537
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1236 AM CDT TUE MAY 2 2006

ILC027-163-020600-
/O.CON.KLSX.SV.W.0252.000000T0000Z-060502T0600Z/
ST. CLAIR IL-CLINTON IL-
1236 AM CDT TUE MAY 2 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 AM CDT
FOR CLINTON AND NORTHERN ST. CLAIR COUNTIES...

AT 1233 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH OVER AVISTON...MOVING
EAST AT 50 MPH.

LOCATIONS NEAR THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
BARTELSO...BECKEMEYER...STOLLETOWN...CARLYLE...POSEY...HUEY...
FERRIN...HOFFMAN...SHATTUC AND BOULDER.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
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 3865 9011 3853 9019 3839 9011 3851 8915
      3872 8914

$$

GKS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 9:06 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Clair	39 min
May 1, 9:56 PM CDT	Severe Thunderstorm Warning	LSX	Monroe	49 min
May 1, 10:06 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Fayette, Montgomery	39 min
May 1, 10:29 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph, Saint Clair	46 min
May 1, 10:40 PM CDT	Tornado Warning	LSX	Randolph	35 min
May 1, 10:49 PM CDT	Tornado Warning	LSX	Washington	26 min
May 1, 11:14 PM CDT	Severe Thunderstorm Warning	LSX	Washington	46 min
May 2, 12:03 AM CDT	Severe Thunderstorm Warning	LSX	Monroe	42 min
May 2, 12:31 AM CDT	Severe Thunderstorm Warning	LSX	Randolph, Saint Clair	59 min
May 2, 12:47 AM CDT	Severe Thunderstorm Warning	LSX	Washington	58 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2006 Every severe thunderstorm warning in 2006

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.