Alert archive / Illinois / Tornado Warnings in 2002

Tornado Warning 10, NWS St. Louis, MO

May 1, 2002Bond County, Illinois

NWS St. Louis, MO issued this tornado warning at May 1, 2002, 1:33 PM CDT for Bond County, Illinois. It was in force for 42 min. 8 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: May 1, 2002, 1:33 PM CDT (18:33 UTC)
Expired: May 1, 2002, 2:15 PM CDT
In force: 42 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

County Bond County, IL

The radar

The St Louis radar (KLSX), 108 km from the middle of the area, began a volume at 18:36 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 1, 1:38 PM CDT	Tornado F1	Greenville, IL	Six tornadoes struck at virtually the same time near Greenville, Illinois. Eye witnesses reported seeing at least 4 tornadoes on the ground at the same time. The tornadoes did not rotate around each other. They each had distinctive paths and moved rapidly east
May 1, 1:38 PM CDT	Tornado F1	Greenville, IL	Six tornadoes struck at virtually the same time near Greenville, Illinois. Eye witnesses reported seeing at least 4 tornadoes on the ground at the same time. The tornadoes did not rotate around each other. They each had distinctive paths and moved rapidly east
May 1, 1:38 PM CDT	Tornado F1	Greenville, IL	Six tornadoes struck at virtually the same time near Greenville, Illinois. Eye witnesses reported seeing at least 4 tornadoes on the ground at the same time. The tornadoes did not rotate around each other. They each had distinctive paths and moved rapidly east
May 1, 1:40 PM CDT	Hail 1.75	Greenville, IL
May 1, 1:40 PM CDT	Tornado F0	Greenville, IL	Six tornadoes struck at virtually the same time near Greenville, Illinois. Eye witnesses reported seeing at least 4 tornadoes on the ground at the same time. The tornadoes did not rotate around each other. They each had distinctive paths and moved rapidly east
May 1, 1:41 PM CDT	Tornado F1	Greenville, IL	Six tornadoes struck at virtually the same time near Greenville, Illinois. Eye witnesses reported seeing at least 4 tornadoes on the ground at the same time. The tornadoes did not rotate around each other. They each had distinctive paths and moved rapidly east
May 1, 1:42 PM CDT	Tornado F1	Greenville, IL	A series of 6 tornadoes struck the Greenville, Illinois area at virtually the same time. Eyewitnesses reported seeing at least 4 tornadoes on the ground at the same time. The tornadoes were lined up north to south and moved in distinct paths to the east southe
May 1, 1:45 PM CDT	Hail 1	Woburn, 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
May 1, 12:45 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 6.6 hours before the alert went out and 156 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: 1126 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 207 m²/s²
0-3 km storm-relative helicity: 327 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.

000 
WFUS53 KLSX 011833
TORSTL
ILC005-011915-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
133 PM CDT WED MAY 1 2002

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  BOND COUNTY IN SOUTH CENTRAL ILLINOIS

* UNTIL 215 PM CDT

* AT 133 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION NEAR RENO. THE
  THUNDERSTORM WAS MOVING EAST AT 40 MPH...AND MAY PRODUCE A TORNADO
  AT ANY TIME

* LOCATIONS IN THE PATH...
  GREENVILLE
  WOBURN
  SMITHBORO
  MULBERRY GROVE
  PLEASANT MOUND

THIS TORNADO WARNING IS AN UPGRADE TO THE SEVERE THUNDERSTORM WARNING
PREVIOUSLY ISSUED FOR THE WARNED AREA.

IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER NOW MOVE TO A
BASEMENT...UNDERGROUND STORM SHELTER...OR AN INTERIOR ROOM OR HALLWAY
ON THE LOWEST LEVEL OF A STURDY BUILDING.

LAT...LON 3902 8959 3875 8961 3874 8926 3903 8927

LENNING

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 1:56 PM CDT	Tornado Warning	LSX	Marion	49 min
May 1, 2:54 PM CDT	Tornado Warning	LSX	Macoupin, Montgomery	21 min

Nearby

Tornado Warnings in Illinois, 2002 Every tornado warning in 2002 Tornadoes in 2002

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.