Alert archive / Illinois / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 68, NWS Lincoln, IL

May 7, 2002Macon County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at May 7, 2002, 1:49 AM CDT for Macon County, Illinois. It was in force for 41 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 7, 2002, 1:49 AM CDT (06:49 UTC)
Expired: May 7, 2002, 2:30 AM CDT
In force: 41 min
Issued by: NWS Lincoln, IL
Area: Counties, with a storm outline in the text

County Macon County, IL

What was reported inside it

Time	Report	Where	Remark
May 7, 2:25 AM CDT	Hail 0.75	Mt Zion, 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 7, 12:45 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 6.8 hours before the alert went out and 51 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: 854 J/kg
Mixed-layer CIN: -111 J/kg
Mixed-layer LCL: 913 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 71 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KILX 070649
SVRSPI
ILC115-070730-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
148 AM CDT TUE MAY 7 2002

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

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

* UNTIL 230 AM CDT

* AT 148 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER BLUE MOUND...OR ABOUT 14 MILES SOUTHWEST
  OF DECATUR...MOVING EAST-NORTHEAST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HARRISTOWN
  MACON
  DECATUR
  MOUNT ZION
  FORSYTH
  LONG CREEK
  OREANA

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.

CHURCHILL

LAT...LON 3985 8921 3968 8913 3968 8883 3990 8877
          3996 8891

NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 12:12 AM CDT	Severe Thunderstorm Warning	ILX	Sangamon	48 min
May 7, 1:02 AM CDT	Severe Thunderstorm Warning	ILX	Sangamon	43 min
May 7, 1:25 AM CDT	Severe Thunderstorm Warning	ILX	Logan	50 min
May 7, 1:28 AM CDT	Severe Thunderstorm Warning	ILX	Christian	47 min
May 7, 1:36 AM CDT	Severe Thunderstorm Warning	ILX	Cass, Menard	39 min
May 7, 2:41 AM CDT	Flash Flood Warning	ILX	Cass, Christian, Logan, Macon, Menard, Morgan and 3 more	6 hr
May 7, 3:18 AM CDT	Severe Thunderstorm Warning	ILX	Effingham, Shelby	42 min
May 7, 3:22 AM CDT	Flash Flood Warning	ILX	Champaign, Clark, Coles, Cumberland, Douglas, Edgar and 3 more	7 hr
May 7, 3:40 AM CDT	Severe Thunderstorm Warning	ILX	Coles, Cumberland, Jasper	35 min
May 7, 4:02 AM CDT	Flash Flood Warning	ILX	Crawford, Effingham, Jasper	7 hr

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.