Alert archive / Illinois / Tornado Warnings in 1991
Tornado Warning 7, NWS Lincoln, IL
NWS Lincoln, IL issued this tornado warning at Apr 29, 1991, 7:33 PM CDT for McLean County, Woodford County, Illinois. It was in force for 27 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
- Apr 29, 1991, 7:33 PM CDT (00:33 UTC)
- Expired
- Apr 29, 1991, 8:00 PM CDT
- In force
- 27 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
Counties McLean County, IL, Woodford County, IL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 29, 7:45 PM CDT | Tornado F0 | Woodford, IL | |
| Apr 29, 8:00 PM CDT | Tornado F1 | Mclean, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Paducah/Barkley, KY (KPAH), launched 00:00Z, 0.6 hours before the alert went out and 398 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.
- Mixed-layer CAPE
- 7 J/kg
- Mixed-layer CIN
- -127 J/kg
- Mixed-layer LCL
- 847 m above ground
- 0-6 km bulk shear
- 75 kt
- 0-1 km storm-relative helicity
- 176 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KPIA 300039 COR
TORPIA
ILC203-113-300100-
BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
TORNADO WARNING ...CORRECTION...
NATIONAL WEATHER SERVICE PEORIA IL
733 PM CDT MON APR 29 1991
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 800 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE CENTRAL PART OF ILLINOIS
SOUTHEAST WOODFORD...WESTERN MCLEAN
AT 725 PM CDT... SEVERAL FUNNEL CLOUDS WERE OBSERVED BY THE PUBLIC
IN A LINE OF THUNDERSTORMS OVER SOUTHWEST MCLEAN COUNTY NEAR THE TOWN
OF MCLEAN UP ACROSS WESTERN MCLEAN COUNTY AND INTO WOODFORD COUNTY
FROM CONGERVILLE TO ROANOKE. THIS IS ALL ABOUT 20 MILES EAST OF
THE PEORIA AREA AND NO THREAT TO PEORIA.
THE THUNDERSTORMS HAVE BEEN MOVING TO THE NORTH AT 30 MPH. THE
LINE OF THUNDERSTORMS WAS MOVING SLOWLY EAST WHICH WILL BRING THE
POSSIBLE TORNADOES OVER EAST MARSHALL AND WEST MCLEAN COUNTIES.
IF YOU ARE IN AN AREA THREATENED BY THE STORM..GO TO A REINFORCED
SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...VERY HEAVY
RAIN AND LIGHTNING.
TOWNS IN THE PATCH OF THESE POSSIBLE TORNADOES INCLUDE THE WESTERN
PARTS OF BLOOMINGTON.
ATTN ISP 6 8
JACOBS
/CORRECTED WARNING AREAL TO WESTERN MCLEAN COUNTY INSTEAD OF EASTERN...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.
In the hours before
Special weather statement, Apr 29, 7:13 PM CDT, 20 minutes before
ILZ009-010-300115- SHORT TERM WEATHER FOR CENTRAL AND EASTCENTRAL ILLINOIS NATIONAL WEATHER SERVICE SPRINGFIELD IL 705 PM CDT MON APR 29 1991 A LINE OF STRONG THUNDERSTORMS HAVE DEVELOPED OVER CENTRAL ILLINOIS. THE LINE EXTENDED FROM JUST EAST OF SPRINGFIELD NORTH TO 30 MILES NORTHEAST OF PEORIA. THE STORMS WERE MOVING TO THE NORTH AT 30 MPH WHILE THE LINE WAS MOVING TO THE EAST AT 30 MPH. THE STRONGEST STORMS WERE LOCATED IN LOGAN COUNTY JUST EAST OF LINCOLN AND 10 MILES NORTHWEST AND 10 MILES SOUTHWEST OF MT PULASKI. THE STORMS WILL MOVE INTO DEWITT AND NORTHERN MACON COUNTIES BY 730 PM. DAMAGING WINDS...HAIL...VERY HEAVY RAIN AND DANGEROUS LIGHTNING MAY ACCOMPANY THESE STORMS. B E ALERT TO THE RAPIDLY CHANGING WEATHER CONDITIONS AND LISTEN FOR FURTHER UPDATES OR POSSIBLE WARNINGS. MUNDY ATTN ISP DIST...9...6...10
Special weather statement, Apr 29, 7:14 PM CDT, 19 minutes before
ILZ009-010-300115- SPECIAL WEATHER STATEMENT...CORRECTION... NATIONAL WEATHER SERVICE SPRINGFIELD IL 710 PM CDT MON APR 29 1991 A LINE OF STRONG THUNDERSTORMS HAVE DEVELOPED OVER CENTRAL ILLINOIS. THE LINE EXTENDED FROM JUST EAST OF SPRINGFIELD NORTH TO 30 MILES NORTHEAST OF PEORIA. THE STORMS WERE MOVING TO THE NORTH AT 30 MPH WHILE THE LINE WAS MOVING TO THE EAST AT 30 MPH. THE STRONGEST STORMS WERE LOCATED IN LOGAN COUNTY JUST EAST OF LINCOLN AND 10 MILES NORTHWEST AND 10 MILES SOUTHWEST OF MT PULASKI. THE STORMS WILL MOVE INTO DEWITT AND NORTHERN MACON COUNTIES BY 730 PM. DAMAGING WINDS...HAIL...VERY HEAVY RAIN AND DANGEROUS LIGHTNING MAY ACCOMPANY THESE STORMS. BE ALERT TO THE RAPIDLY CHANGING WEATHER CONDITIONS AND LISTEN FOR FURTHER UPDATES OR POSSIBLE WARNINGS. MUNDY ATTN ISP DIST...9...6...10
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 7:04 PM CDT | Tornado Warning | ILX | McLean, Woodford | 26 min |
| Apr 29, 7:40 PM CDT | Severe Thunderstorm Warning | ILX | Christian, Macon | 65 min |
| Apr 29, 7:40 PM CDT | Severe Thunderstorm Warning | ILX | DeWitt | 65 min |
| Apr 29, 7:41 PM CDT | Tornado Warning | ILX | DeKalb, Lee | 34 min |
| Apr 29, 7:58 PM CDT | Tornado Warning | ILX | Boone | 32 min |
| Apr 29, 8:02 PM CDT | Tornado Warning | ILX | McLean | 58 min |
| Apr 29, 8:31 PM CDT | Tornado Warning | ILX | DeWitt, Piatt | 44 min |
Nearby
Tornado Warnings in Illinois, 1991Every tornado warning in 1991Tornadoes in 1991
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.