Alert archive / Illinois / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 35, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Jun 29, 1987, 4:47 PM CDT for Champaign County, Vermilion County, Illinois. It was in force for 43 min. 1 report 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 29, 1987, 4:47 PM CDT (21:47 UTC)
- Expired
- Jun 29, 1987, 5:30 PM CDT
- In force
- 43 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
Counties Champaign County, IL, Vermilion County, IL
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 29, 4:50 PM CDT | Thunderstorm Wind 50 | Champaign, 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
Peoria Regional, IL (KPIA), launched 12:00Z, 9.8 hours before the alert went out and 149 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
- 732 J/kg
- Mixed-layer CIN
- -189 J/kg
- Mixed-layer LCL
- 1148 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 218 m²/s²
- 0-3 km storm-relative helicity
- 222 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSPI 292147 SVRSPI ILC019-183-292230- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SPRINGFIELD IL 447 PM CDT MON JUN 29 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 530 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF EAST CENTRAL ILLINOIS...CHAMPAIGN AND VERMILION AT 438 PM CDT A SEVERE THUNDERSTORM WAS REPORTED 10 MILES NORTHWEST OF CHAMPAIGN NEAR MAHOMET. THE SEVERE THUNDERSTORM WAS MOVING EAST AT 30 MPH. 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 LIGHTNING. REMEMBER...SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE WARNING SO BE ON THE LOOKOUT. INTENSE LIGHTNING IS REPORTED WITH THIS STORM. IF OUTDOORS... STAY AWAY FROM HIGH OBJECTS. MOVE INDOOR IF POSSIBLE. WHLEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES AND ELECTRICAL EQUIPMENT. THIS IS A DANGEROUS STORM. TAKE COVER IMMEDIATELY. ATTN ISP DIST...10 DETGEN
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, Jun 29, 1:34 PM CDT, 3 hours 13 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEORIA IL
135 PM CDT MON JUN 29 1987
...STRONG THUNDERSTORM SOUTH OF BLOOMINGTON ILLINOIS...
AT 130 PM CDT...RADAR INDICATED A STRONG THUNDERSTORM ABOUT
5 MILES SOUTH OF BLOOMINGTON IN NORTH CENTRAL ILLINOIS.
MC LEAN COUNTY EMERGENCY SERVICES REPORTED PEA SIZE HAIL WITH
THIS STORM.
THE THUNDERSTORM WAS MOVING EAST AT 40 MPH AND SHOULD REACH
GIBSON CITY IN FORD COUNTY BY AROUND 230 PM.
THIS STORM MAY PRODUCE LARGER HAIL AS IT MOVES EAST ACROSS MC LEAN
COUNTY. ALSO EXPECT BRIEF STRONG GUSTY WIND TO 45 MPH..DANGEROUS
LIGHTNING AND BRIEF HEAVY RAIN.
OTHER THUNDERSTORMS WERE 10 MILES WEST OF BLOOMINGTON AND
ON THE NORTH EDGE OF NORMAL ILLINOIS. THESE ALSO WERE MOVING
EAST AT 40 MPH.
PALMER
ATTN ISP DISTS...6 AND 6A
NSpecial weather statement, Jun 29, 1:42 PM CDT, 3 hours 5 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 140 PM CDT MON JUN 29 1987 ...STRONG THUNDERSTORM DEVELOPING RAPIDLY OVER WEST CENTRAL ILLINOIS... AT 135 PM...RADAR INDICATED A NEWLY DEVELOPED STRONG THUNDERSTORM IN NORTH CENTRAL SCHUYLER COUNTY ABOUT 15 MILES NORTH OF RUSHVILLE ILLINOIS AND 25 MILES SOUTH OF MACOMB ILLINOIS. THIS STRONG STORM WAS MOVING EAST AT 40 MPH AND WILL BE NEAR ASTORIA AND HAVANA ILLINOIS BY AROUND 245 PM. DANGEROUS LIGHTNING...PEA TO MARBLE SIZE HAIL...STRONG GUSTY WIND AND BRIEF HEAVY RAIN WILL ACCOMPANY THIS STORM. PALMER ATTN ISP DISTS9..14..AND 20 Q
Special weather statement, Jun 29, 2:40 PM CDT, 2 hours 7 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SPRINGFIELD IL 2 35 PM CDT MON JUN 29 1987 ...STRONG THUNDERSTORMS DEVELOPING IN WESTERN ILLINOIS... AT 2 30 PM CDT WEATHER RADARS SHOWS RAPIDLY DEVELOPING STRONG THUNDERSTORMS IN WESTERN ILLINOIS FROM 25 MILES SOUTHWEST OF SPRINGFIELD THEN NORTH TO NEAR MASON CITY ILLINOIS TO JUST SOUTH OF WATSEKA ILLINOIS. THE STRONGEST THUNDERSTORMS MAY PRODUCE...STRONG GUSTY WINDS...HAIL ...DANGEROUS LIGHTNING AND BRIEF HEAVY DOWNPOURS. THE AREA OF THUNDERSTORMS WERE MOVING EAST AT 35 MPH. HILLIARD [ ] [ ~]
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 2:43 PM CDT | Tornado Warning | ILX | McLean | 47 min |
| Jun 29, 3:04 PM CDT | Severe Thunderstorm Warning | ILX | Vermilion | 41 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1987Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.