Alert archive / Illinois / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 152, NWS Lincoln, IL

June 20, 2000Macon County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jun 20, 2000, 1:55 PM CDT for Macon County, Illinois. It was in force for 50 min. 1 report 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: Jun 20, 2000, 1:55 PM CDT (18:55 UTC)
Expired: Jun 20, 2000, 2:45 PM CDT
In force: 50 min
Issued by: NWS Lincoln, IL
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Macon County, IL

What was reported inside it

Time	Report	Where	Remark
Jun 20, 2:05 PM CDT	Thunderstorm Wind	Decatur, IL	A couple of trees were blown down and several others had their tops ripped off.

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, 6.9 hours before the alert went out and 38 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: 135 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 1033 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 216 m²/s²
0-3 km storm-relative helicity: 234 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

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

495 
WUUS53 KILX 201856
SVRSPI
ILC115-201945-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
155 PM CDT TUE JUN 20 2000

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MACON COUNTY IN CENTRAL ILLINOIS

* UNTIL 245 PM CDT

* AT 155 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES NORTH OF WARRENSBURG...OR ABOUT 12
  MILES NORTHWEST OF DECATUR...MOVING EAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HARRISTOWN
  WARRENSBURG
  FORSYTH
  MAROA
  DECATUR
  OREANA
  ARGENTA

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 THE NEAREST LAW
ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE. STAY
TUNED FOR LATER STATEMENTS.

LAT...LON 4006 8913 3985 8912 3980 8875 4005 8877

HEDGES

NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 1:24 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Shelby	51 min
Jun 20, 2:05 PM CDT	Severe Thunderstorm Warning	ILX	Vermilion	40 min
Jun 20, 2:11 PM CDT	Tornado Warning	ILX	Shelby	49 min
Jun 20, 2:48 PM CDT	Tornado Warning	ILX	Shelby	42 min
Jun 20, 3:27 PM CDT	Tornado Warning	ILX	Effingham	63 min
Jun 20, 3:30 PM CDT	Tornado Warning	ILX	Shelby	45 min
Jun 20, 3:39 PM CDT	Tornado Warning	ILX	Coles	66 min
Jun 20, 3:55 PM CDT	Tornado Warning	ILX	Cumberland	65 min
Jun 20, 4:15 PM CDT	Tornado Warning	ILX	Clark, Edgar	60 min
Jun 20, 4:19 PM CDT	Tornado Warning	ILX	Jasper	56 min
Jun 20, 5:43 PM CDT	Severe Thunderstorm Warning	ILX	Cass	62 min
Jun 20, 6:16 PM CDT	Severe Thunderstorm Warning	ILX	Menard	59 min
Jun 20, 6:32 PM CDT	Severe Thunderstorm Warning	ILX	Scott	58 min
Jun 20, 6:40 PM CDT	Tornado Warning	ILX	Logan	65 min
Jun 20, 6:42 PM CDT	Severe Thunderstorm Warning	ILX	Knox	63 min
Jun 20, 6:53 PM CDT	Severe Thunderstorm Warning	ILX	Morgan	67 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2000 Every severe thunderstorm warning in 2000

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.