Alert archive / Illinois / Tornado Warnings in 1999

Tornado Warning 56, NWS Lincoln, IL

June 4, 1999DeWitt County, McLean County, Illinois

NWS Lincoln, IL issued this tornado warning at Jun 4, 1999, 5:27 PM CDT for DeWitt County, McLean County, Illinois. It was in force for 33 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 4, 1999, 5:27 PM CDT (22:27 UTC)
Expired: Jun 4, 1999, 6:00 PM CDT
In force: 33 min
Issued by: NWS Lincoln, IL
Area: Whole counties

Counties DeWitt County, IL, McLean County, IL

What was reported inside it

Time	Report	Where	Remark
Jun 4, 5:35 PM CDT	Tornado F0	Saybrook, IL	A tornado briefly touched down in a field one mile south of Saybrook. No damage was reported.
Jun 4, 5:38 PM CDT	Tornado F0	Anchor, IL	A tornado touched down briefly several times from 2 miles north of Anchor to half a mile north of Cropsey. No damage was reported.

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
Jun 4, 2:30 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 4, 4:30 PM CDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.5 hours before the alert went out and 31 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: 1578 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSPI 042227
TORSPI
ILC039-113-042300-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
527 PM CDT FRI JUN 4 1999

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN DE WITT COUNTY IN CENTRAL ILLINOIS
  EASTERN MCLEAN COUNTY IN CENTRAL ILLINOIS

* UNTIL 600 PM CDT

* AT AT 525 PM CDT... LINCOLN DOPPLER RADAR INDICATED A POSSIBLE
  TORNADO 15 MILES NORTHEAST OF BLOOMINGTON/NORMAL TO CLINTON...
  MOVING EAST SOUTHEAST AT 45 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  COLFAX
  LE ROY
  SAYBROOK
  FARMER CITY
  WELDON

IF YOU ARE IN THE PATH OF THIS STORM...TAKE COVER IN A BASEMENT OR
INTERIOR ROOM ON THE LOWEST FLOOR. VEH\ICLES AND MOBILE HOMES SHOULD
BE ABANDONED FOR A SAFER SHELTER.

SMITH/AUTEN

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Lincoln, IL wrote its last area forecast discussion before this tornado warning went out at Jun 4, 2:33 PM CDT, 2 hours 54 minutes earlier.

Area forecast discussion, Jun 4, 2:33 PM CDT, 2 hours 54 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
200 PM CDT FRI JUN 4 1999

SVR WX POSSIBLE THIS AFTN AND EVENING AS LINE OF STORMS CONTS TO MOVE SE
INTO WCNTRL IL. SVR BOX ISSUED FOR PORTION OF AREA. WILL GROUP THEM
TOGETHER FOR TONIGHT. REMAINDER OF AREA WILL PUT LIKELY POPS IN. MCS
WILL DEVELOP LATER TONIGHT AGAIN IN NRN PLAINS AND THEN TURN SE AND MOVE
ACRS NRN HALF OF IL LATE TONIGHT AND INTO TOM MORN.

COULD SEE SOMEMORE PCPN TOMORROW AFTN AND EVE IF ANY OUTFLOW BNDRIES
DECIDE TO FLARE AGAIN LIKE TODAY. OTHERWISE WARMER AND MORE HUMID WX IS
ARRIVING FOR WEEKEND AND INTO NEXT WEEK.

NOT ALOT OF TIME FOR MORE TALK. CALL IF NEED MORE.

WILL TRY FOR OZFILX.

PRELIMINARY CtCF FOR COORDINATION.

SPI BB 067/087 069/089 77743
PIA BB 065/085 068/088 77743
DEC BB 067/087 069/089 77643
CMI BB 062/084 066/087 77643
MTO BB 066/086 069/089 77633
LWV BB 066/086 069/089 77533

AUTEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 4, 2:53 PM CDT	Severe Thunderstorm Warning	ILX	Knox, Stark	67 min
Jun 4, 3:27 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, Peoria	63 min
Jun 4, 3:51 PM CDT	Tornado Warning	ILX	Marshall	54 min
Jun 4, 4:01 PM CDT	Tornado Warning	ILX	Mason, Schuyler	59 min
Jun 4, 4:01 PM CDT	Tornado Warning	ILX	Tazewell, Woodford	59 min
Jun 4, 4:30 PM CDT	Tornado Warning	ILX	DeWitt, Logan, McLean, Menard	60 min
Jun 4, 4:30 PM CDT	Tornado Warning	ILX	Cass	60 min
Jun 4, 4:50 PM CDT	Tornado Warning	ILX	Macon, Sangamon	55 min
Jun 4, 4:50 PM CDT	Tornado Warning	ILX	Morgan, Scott	55 min
Jun 4, 5:11 PM CDT	Tornado Warning	ILX	Piatt	49 min
Jun 4, 5:11 PM CDT	Tornado Warning	ILX	Christian	49 min
Jun 4, 5:33 PM CDT	Tornado Warning	ILX	Champaign, Douglas, Moultrie	57 min
Jun 4, 5:33 PM CDT	Tornado Warning	ILX	Shelby	57 min
Jun 4, 5:47 PM CDT	Tornado Warning	ILX	Macon, Piatt	28 min
Jun 4, 6:01 PM CDT	Tornado Warning	ILX	Christian	14 min
Jun 4, 6:11 PM CDT	Tornado Warning	ILX	Coles	64 min
Jun 4, 6:25 PM CDT	Tornado Warning	ILX	Champaign, Douglas	35 min
Jun 4, 6:25 PM CDT	Tornado Warning	ILX	Shelby	35 min
Jun 4, 6:34 PM CDT	Tornado Warning	ILX	Cumberland, Effingham	56 min
Jun 4, 6:34 PM CDT	Tornado Warning	ILX	Edgar, Vermilion	56 min
Jun 4, 6:43 PM CDT	Tornado Warning	ILX	Clark, Clay, Jasper	62 min

Nearby

Tornado Warnings in Illinois, 1999 Every tornado warning in 1999 Tornadoes in 1999

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.