Alert archive / Illinois / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 76, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Sep 26, 1986, 1:25 PM CDT for Sangamon County, Illinois. It was in force for 30 min.
The area
The counties it named.
The facts
- Issued
- Sep 26, 1986, 1:25 PM CDT (18:25 UTC)
- Expired
- Sep 26, 1986, 1:55 PM CDT
- In force
- 30 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
County 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 12:00Z, 6.4 hours before the alert went out and 102 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
- 1609 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 936 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 133 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSPI 261825 SVRSPI ILC167-261915- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SPRINGFIELD IL 125 PM CDT FRI SEP 26 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 215 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF CENTRAL ILLINOIS...SANGAMON AT 110 PM CDT A SEVERETHUNDERSTORM PRODUCING A FUNNEL CLOUD WAS REPORTED BY THE PUBLIC ABOUT 12 MILES WEST OF SPRINGFIELD ILLINOIS. THE SEVERE THUNDERSTORM WAS MOVING EAST AT 30 MPH. REMEMBER..A SEVERE THUNDERSTORM PRODUCES DAMAGING WINDS IN EXCESS OF 60 MPH...LARGE HAIL...DEADLY LIGHTNING AND HEAVY RAINS THAT CAN QUICKLY FLOOD A LOW LYING AREA. IF THREATENING WEATHER APPROACHES...YOU SHOULD GO TO A SAFE PLACE. ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR REPORT OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE. ATTN ISP DIST..9 HUGHES
What forecasters said that day
The local office's own words before this severe thunderstorm 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, Sep 26, 9:09 AM CDT, 4 hours 16 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SPRINGFIELD IL 905 AM CDT FRI SEP 25 1986 ...STRONG THUNDERSTORMS MOVING THROUGH WEST CENTRAL ILLINOIS... AT 900 AM CDT RADAR INDICATED AN AREA OF STRONG THUNDERSTORMS IN WEST CENTRAL ILLINOIS EXTENDING FROM 40 MILES NORTHWEST OF SPRINGFIELD ILLINOIS TO 35 MILES NORTHWEST OF ST LOUIS MISSOURI. THE STRONGEST STORMS IN THIS AREA WERE LOCATED NEAR PITTSFIELD... 10 MILES WEST OF JACKSONVILLE...AND 10 WEST OF BEARDSTOWN ILLINOIS. THESE STORMS WILL BE ACCOMPANIED BY STRONG GUSTY WINDS...SOME HAIL... DANGEROUS LIGHTNING AND BRIEF HEAVY DOWNPOURS. THE THUNDERSTORMS WERE MOVE NORTHEAST AT 30 MPH AND WILL BE MOVING THROUGH CASS AND MORGAN COUNTIES BETWEEN 915 AM AND 1015 AM CDT. HUGHES
Special weather statement, Sep 26, 10:01 AM CDT, 3 hours 24 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SPRINGFIELD IL 1000 AM CDT FRI SEP 26 1986 ...STRONG THUNDERSTORMS CONTINUE ACROSS WEST CENTRAL ILLINOIS... AT 945 AM CDT RADAR INDICATED A 30 MILE WIDE AREA OF STRONG THUNDER- STROMS OVER WEST CENTRAL ILLINOIS. THE LEADING EDGE OF THESE STORMS EXTENDED FROM 35 MILES NORTHWEST OF SPRINGFIELD ILLINOIS... NEAR HAVANA...TO 25 MILES NORTH OF ST LOUIS MISSOURI...NEAR CARROLTON. STRONGEST STORMS IN THE AREA WERE NEAR CHANDLERVILLE...JUST NORTHWEST OF JACKSONVILLE...AND 15 MILES SOUTHWEST OF JACKSONVILLE ILLINOIS. THESE STORMS MAY PRODUCE STRONG GUSTY WINDS...SOME HAIL...DANGEROUS LIGHTNING AND BRIEF HEAVY DOWNPOURS. THE THUNDERSTROMS WERE 6MOVING EAST AT 30 MILES AN HOUR AND WILL BE MOVING INTO MENARD...SANGAMON...AND MACOUPIN COUNTIES BETWEEN 1000 AM AND 1100 AM CDT. HUGHES
Special weather statement, Sep 26, 12:43 PM CDT, 42 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SPRINGFIELD IL 1235 PM CDT FRI SEP 26 1986 ...STRONG THUNDERSTORMS MOVING ACROSS WESTERN SANGAMON COUNTY... AT 1230 PM CDT RADAR INDICATD SEVERAL STRONG THUNDERSTORMS IN WESTERN SANGAMON COUNTY EXTENDING FROM 10 MILE WEST NORTHWEST OF SPRINGFIELD ILLINOIS TO 30 MILES SOUTHWEST OF SPRINGFIELD ILLINOIS. STRONG GUSTY WINDS...LOCALLY HEAVY RAIN...DANGEROUS LIGHTNING AND POSSIBLY SOME SMALL HAIL CAvN BE EXPECTED WITH THESE STORMS. THE THUNDERSTORMS ARE MOVING EAST AT 25 MILES AN HOUR AND WILL PASS THROUGH THE SPRINGFIELD AREA BETWEEN 1245 PM AND 130 PM CDT. HUGHES
Nearby
Severe Thunderstorm Warnings in Illinois, 1986Every severe thunderstorm warning in 1986
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.