Alert archive / Illinois / Tornado Warnings in 1987
Tornado Warning 24, NWS Lincoln, IL
NWS Lincoln, IL issued this tornado warning at Aug 8, 1987, 8:04 PM CDT for Christian County, Sangamon County, Illinois. It was in force for 26 min.
The area
The counties it named.
The facts
- Issued
- Aug 8, 1987, 8:04 PM CDT (01:04 UTC)
- Expired
- Aug 8, 1987, 8:30 PM CDT
- In force
- 26 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
Counties Christian County, IL, Sangamon County, IL
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Peoria Regional, IL (KPIA), launched 00:00Z, 1.1 hours before the alert went out and 114 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
- 1337 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 940 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 160 m²/s²
- 0-3 km storm-relative helicity
- 318 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 11.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSPI 090104 TORSPI ILC167-021-090130- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SPRINGFIELD IL 804 PM CDT SAT AUG 8 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 830 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF CENTRAL ILLINOIS...SANGAMON AND CHRISTIAN AT 7 50 PM CDT JACKSONVILLE CITY POLICE..30 MILES WEST OF SPRINGFIELD ILLINOIS REPORTED A TORNADO FORMING 1 MILE SOUTH OF JACKSONVILLE MOVING EAST SOUTHEAST. THIS STORM TOOK TREES OUT BY ROOTS AND TOOK ROOFS OFF FARM BUILDINGS. IF YOU ARE IN THE PATH OF A TORNADO...GO TO A BASEMENT SHELTER IF AVAILABLE...OTHERWISE TO A CENTRAL INTERIOR ROOM ON THE LOWEST FLOOR. ABANDON CARS AND MOBILE HOMES FOR A REINFORCED BUILDING. 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 DANGEROUS LIGHTING. THIS IS A DANGEROUS STORM. TAKE COVER IMMEDIATELY. ATTN ISP DIST...9 DAVIS
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, Aug 8, 7:23 PM CDT, 41 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SPRINGFIELD IL 7 20 PM CDT SAT AUG 8 1987 ...STRONG THUNDERSTORMS OVER WEST CENTRAL ILLINOIS AT 7 15 PM CDT RADAR INDICATED STRONG THUNDERSTORMS OVER WEST CENTRAL ILLINOIS. THE STRONGEST THUNDERSTORM WAS JUST SOUTHWEST OF PALMYRA ILLINOIS ...35 MILES SOUTHWEST OF SPRINGFIELD. OTHER STRONG THUNDERSTORMS WERE LOCATED 30 WEST OF SPRINGFIELD ILLINOIS IN THE JACKSONVILLE AREA. THE STORMS WEREj MOVING EAST AT 30 MPH. THESE STORMS MAY PRODUCE LOCALLY HEAVY RAIN...STRONG GUSTY WINDS AND SMALL HAIL. DAVIS
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 8:51 PM CDT | Severe Thunderstorm Warning | ILX | Christian, Sangamon | 69 min |
Nearby
Tornado Warnings in Illinois, 1987Every tornado warning in 1987Tornadoes in 1987
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.