Alert archive / Illinois / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 7, NWS Lincoln, IL

April 12, 20024 counties in Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Apr 12, 2002, 3:37 PM CDT for 4 counties in Illinois. It was in force for 53 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: Apr 12, 2002, 3:37 PM CDT (20:37 UTC)
Expired: Apr 12, 2002, 4:30 PM CDT
In force: 53 min
Issued by: NWS Lincoln, IL
Area: Counties, with a storm outline in the text

Counties Champaign County, IL, Douglas County, IL, Edgar County, IL, Vermilion County, IL

The radar

The Lincoln radar (KILX), 113 km from the middle of the area, began a volume at 20:37 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
Apr 12, 3:42 PM CDT	Hail 0.75	Tuscola, IL
Apr 12, 4:19 PM CDT	Hail 0.75	Sidell, 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 nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.6 hours before the alert went out and 56 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: 215 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 1073 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 122 m²/s²
0-3 km storm-relative helicity: 97 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KILX 122037
SVRSPI
ILC019-041-045-183-122130-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
336 PM CDT FRI APR 12 2002

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  VERMILION COUNTY IN EAST CENTRAL ILLINOIS
  CHAMPAIGN COUNTY IN EAST CENTRAL ILLINOIS
  EDGAR COUNTY IN EAST CENTRAL ILLINOIS
  DOUGLAS COUNTY IN EAST CENTRAL ILLINOIS

* UNTIL 430 PM CDT

* AT 336 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 16 MILES SOUTHWEST OF TUSCOLA
  TO NEWMAN...MOVING NORTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  HUME
  CAMARGO
  TUSCOLA
  CHRISMAN
  SIDELL
  RIDGE FARM
  PESOTUM

THIS STORM IS CAPABLE OF PRODUCING WINDS IN EXCESS OF 60 MPH...
DAMAGING HAIL...FREQUENT LIGHTNING...AND VERY HEAVY RAIN. TAKE
SHELTER IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

REPORT SEVERE WEATHER OR ANY STORM DAMAGE TO YOUR LOCAL ESDA...OR THE
NEAREST LAW ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER
SERVICE. STAY TUNED FOR LATER STATEMENTS.

LAT...LON 3966 8846 3980 8755 4010 8755 4004 8796
          3988 8845

BYRD
NNNN

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 12, 2:01 PM CDT	Severe Thunderstorm Warning	ILX	Vermilion	44 min
Apr 12, 2:30 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Shelby	45 min
Apr 12, 3:09 PM CDT	Severe Thunderstorm Warning	ILX	Moultrie, Shelby	51 min
Apr 12, 3:17 PM CDT	Severe Thunderstorm Warning	ILX	Effingham	28 min
Apr 12, 3:47 PM CDT	Severe Thunderstorm Warning	ILX	Cumberland, Effingham	43 min
Apr 12, 3:55 PM CDT	Tornado Warning	ILX	Champaign, Douglas	35 min
Apr 12, 4:06 PM CDT	Severe Thunderstorm Warning	ILX	Coles	54 min
Apr 12, 4:31 PM CDT	Severe Thunderstorm Warning	ILX	Edgar, Vermilion	59 min
Apr 12, 5:13 PM CDT	Severe Thunderstorm Warning	ILX	Clay	47 min
Apr 12, 5:21 PM CDT	Flash Flood Warning	ILX	Edgar, Vermilion	4 hr
Apr 12, 5:25 PM CDT	Severe Thunderstorm Warning	ILX	Richland	50 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2002 Every severe thunderstorm warning 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.