Alert archive / Illinois / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 48, NWS St. Louis, MO

April 10, 2001Bond County, Madison County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 10, 2001, 10:14 PM CDT for Bond County, Madison County, Illinois. It was in force for 61 min. 3 reports came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Apr 10, 2001, 10:14 PM CDT (03:14 UTC)
Expired: Apr 10, 2001, 11:15 PM CDT
In force: 61 min
Issued by: NWS St. Louis, MO
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Bond County, IL, Madison County, IL

The radar

The St Louis radar (KLSX), 77 km from the middle of the area, began a volume at 03:16 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
Apr 10, 10:25 PM CDT	Hail 1	Troy, IL
Apr 10, 10:30 PM CDT	Hail 1.75	Highland, IL
Apr 10, 10:30 PM CDT	Thunderstorm Wind 55 E	Marine, IL

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 10, 7:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 3.2 hours before the alert went out and 179 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: 314 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 857 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 201 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLSX 110320
SVRSTL
ILC005-119-110415-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1014 PM CDT TUE APR 10 2001

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BOND COUNTY IN SOUTH CENTRAL ILLINOIS
  MADISON COUNTY IN SOUTHWEST ILLINOIS

* UNTIL 1115 PM CDT

* AT 1014 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER ALHAMBRA...MOVING EAST AT 35 MPH.
  GOLBALL SIZE HAIL WAS REPORTED AT EARLIER AT 10 PM BY LOCAL POLICE
  IN EDWARDSVILLE...AND 2 INCH DIAMETER HAIL WAS REPORTED IN PONTOON
  BEACH.  STRUCTURAL DAMAGE OCCURRED IN THE PONTOON BEACH AREA AND
  IN THE NORTH SIDE OF GRANITE CITY AT 945 TO 955 PM WITH
  DAMAGING WINDS FROM THE SEVERE STORM.

* LOCATIONS IN THE PATH...
  ALHAMBRA
  GRANTFORK
  OLD  RIPLEY
  SHILOW HILL
  POCAHONTAS
  RENO
  SORENTO
  GREENVILLE
  WOBURN
  MULBERRY GROVE

THIS IS A DANGEROUS STORM WINDS FROM A SEVERE THUNDERSTORM CAN
PRODUCE DAMAGE SIMILAR TO THAT OF A TORNADO...AND VERY LARGE HAIL CAN
CAUSE SERIOUS INJURY AND SEVERE PROPERTY DAMAGE. MOVE TO AN INTERIOR
ROOM ON THE L7OWEST FLOOR OF YOUR HOME OR BUSINESS...AND STAY AWAY
FROM WINDOWS

LAT...LON 3900 9026 3881 9009 3867 9017 3869 8962
          3875 8959 3876 8928 3903 8927

GKS/RP

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 9:08 PM CDT	Tornado Warning	LSX	Madison	67 min
Apr 10, 11:00 PM CDT	Tornado Warning	LSX	Bond, Fayette	45 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.