Alert archive / Illinois / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 77, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Sep 28, 1986, 4:39 PM CDT for Stark County, Illinois. It was in force for 66 min.
The area
The counties it named.
The facts
- Issued
- Sep 28, 1986, 4:39 PM CDT (21:39 UTC)
- Expired
- Sep 28, 1986, 5:45 PM CDT
- In force
- 66 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
County Stark 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, 9.7 hours before the alert went out and 50 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
- 2727 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 720 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 117 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 282139 SVRPIA ILC175-155-282245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PEORIA IL 439 PM CDT SUN SEP 28 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 545 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF CENTRAL ILLINOIS...CENTRAL AND NORTHEAST STARK AND PUTNAM AT 627 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM IN NORTHEAST MARSHALL COUNTY JUST SOUTHWEST OF HENRY. MARBLE SIZE HAIL WAS REPORTED OVER CAMP GROVE AND GOLF BALL SIZE HAIL WAS REPORTED JUST OF BRADFORD BY WEATHER SPOTTERS. HEAVY RAIN WAS ALSO REPORTED. THE STORM WAS MOVING NORTHEAST AT 20 MILES AN HOUR. COMMUNITIES IN THE PATH OF THIS STORM ARE HENRY IN MARSHALL COUNTY AND SALL MILL LAKE AND MCNABB IN PUTNAM COUNTY. REMEMBER A SEVERE THUNDERSTORM CAN PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH...LARGE HAIL...DEADLY LIGHTNING...AND HEAVY RAIN THAT CAN QUICKLY FLOOD A LPOW LYING AREA. ATTN ISP 8 17 STUMETZ
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 28, 10:39 AM CDT, 6 hours before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 1035AM CDT SUN SEP 28 1986 ...ANOTHER THUNDERSTORM.... A THUNDERSTORM IS ONCE AGAIN MOVING THROUGH THE PEORIA AND PEKIN AREA. AT 1030 AM THIS STORM WAS OVER THE AIRPORT AND EXTENDED TO THE SOUTH FROM THERE. VERY HEAVY RAIN HAS BEGUN AND THE LIGHTNING HAS BEEN QUITE STRONG. THIS STORM IS MOVING TOWARD THE EAST NORTHEAST AT ABOUT 30 MILES AN HOUR. THE PREVIOUS THUNDERSTORM HAD MOVED ON OUT OF THE WOODFORD AND MCLEAN COUNTIES...INTO EASTERN LIVINGSTON...AND STILL APPEARED TO BE PRODUCING SOME PRETTY HEAVY RAIN. STARK STARK
Special weather statement, Sep 28, 1:38 PM CDT, 3 hours 1 minute before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 135 PM CDT SUN SEP 28 1986 ...THUNDERSTORMS DEVELOPING... RADAR ONCE AGAIN INDICATES THUNDERSTORMS DEVELOPING OVER WEST CENTRAL ILLINOIS. THE SCATTERED AREA OF SHOWERS AND THUNDERSTORMS EXTENDED FROM JUST WEST OF FARMINGTON... ABOUT 30 WEST OF PEORIA.. THROUGH MACOMB TO JUST EAST AND SOUTH OF QUINCY. THE SHOWERS AND THUNDERSTORMS SHOULD MOVE TOWARD THE NORTHEAST AT ABOUT 25 MILES AN HOUR. STARK
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 28, 4:39 PM CDT | Severe Thunderstorm Warning | ILX | Putnam | 51 min |
| Sep 28, 5:14 PM CDT | Severe Thunderstorm Warning | ILX | Boone, Winnebago | 61 min |
| Sep 28, 5:20 PM CDT | Severe Thunderstorm Warning | ILX | Stephenson | 55 min |
| Sep 28, 6:00 PM CDT | Tornado Warning | ILX | Boone, Ogle, Winnebago | 60 min |
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.