Alert archive / Illinois / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 22, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Jun 2, 1987, 2:32 AM CDT for DeKalb County, Ogle County, Illinois. It was in force for 43 min.
The area
The counties it named.
The facts
- Issued
- Jun 2, 1987, 2:32 AM CDT (07:32 UTC)
- Expired
- Jun 2, 1987, 3:15 AM CDT
- In force
- 43 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
Counties DeKalb County, IL, Ogle 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, 7.5 hours before the alert went out and 152 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
- 828 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 1591 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KRFD 020732 SVRRFD ILC141-037-020815- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ROCKFORD IL 232 AM CDT TUE JUN 2 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 315 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF NORTH CENTRAL ILLINOIS...OGLE AND DEKALB AT ABOUT 210 AM CDT SOME TREES AND POWER LINES WERE REPORTED DOWN AT DIXON ILLINOIS IN NORTHWEST LEE COUNTY. THIS WAS REPORTED BY THE STATE POLICE AND THE LEE COUNTY SHERIFF DEPARTMENT. RADAR INDICATED THE STORMS WERE MOVING TO THE EAST NORTHEAST AT 35 MPH. SOME COMMUNITIES AFFECTED BY THIS SEVERE THUNDERSTORM... ROCHELLE AND DEKALB ILLINOIS. IF YOU ARE IN AN AREA THREATENED BY THE STORM... GO TO A REINFORECED SHELTER. SEVERE THUNDERSTORMS CAN PRODUCE WINDS OF 60 MPH OR GREATER... LARGE HAIL... DANGEROUS LIGHTNING AND HEAVY RAIN THAT CAN QUICKLY FLOOD A LOW LYING AREA. ATTN: ISP DIST 1..2 HELGERSON
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 2, 12:39 AM CDT, 1 hour 53 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 1237 AM CDT TUE JUN 2 1987 AT 1230 AM AN AREA OF SHOWERS AND A FEW STRONG THUNDERSTORMS WAS OVER WESTERN ILLINOIS. THE EASTERN EDGE OF THE AREA OF SHOWERS AND STORMS EXTENDED FROM JUST SOUTH OF THE QUAD CITIES TO JUST EAST OF MONMOUTH TO ABOUT 10 MILES WEST OF MACOMB ON SOUTHWEST TO BETWEEN QUINCY AND MT STERLING. THE HEAVIEST STORMS WERE NEAR MONMOUTH...ROSEVILLE AND JUST TO THE EAST AND NORTHEAST OF CARTHAGE. MOVEMENT OF THE STORMS AND SHOWERS WAS TO THE EAST AT ABOUT 25 MPH AND SHOULD REACH A LINE FROM GALESBURG TO MACOMB SHORTLY AFTER 100 AM. THE STORMS MAY CONTAIN DANGEROUS LIGHTNING...BRIEF HEAVY RAIN AND WIND GUSTS TO^ AROUND 35 MPH. ATTN ISP DIST 14 7 RAY
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 2, 12:19 PM CDT | Severe Thunderstorm Warning | ILX | McDonough | 41 min |
| Jun 2, 12:20 PM CDT | Severe Thunderstorm Warning | ILX | Cass, Morgan | 55 min |
| Jun 2, 12:34 PM CDT | Severe Thunderstorm Warning | ILX | Menard | 56 min |
| Jun 2, 1:03 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Piatt | 57 min |
| Jun 2, 1:09 PM CDT | Severe Thunderstorm Warning | ILX | Sangamon | 55 min |
| Jun 2, 1:47 PM CDT | Severe Thunderstorm Warning | ILX | Tazewell, Woodford | 58 min |
| Jun 2, 2:00 PM CDT | Tornado Warning | ILX | Champaign, Vermilion | 30 min |
| Jun 2, 2:10 PM CDT | Tornado Warning | ILX | Tazewell | 65 min |
| Jun 2, 2:12 PM CDT | Severe Thunderstorm Warning | ILX | Macon | 48 min |
| Jun 2, 2:33 PM CDT | Tornado Warning | ILX | Vermilion | 27 min |
| Jun 2, 2:35 PM CDT | Tornado Warning | ILX | McLean | 55 min |
| Jun 2, 2:44 PM CDT | Severe Thunderstorm Warning | ILX | Cass, Menard | 46 min |
| Jun 2, 5:55 PM CDT | Severe Thunderstorm Warning | ILX | Clark, Cumberland, Shelby | 50 min |
| Jun 2, 5:55 PM CDT | Severe Thunderstorm Warning | ILX | Edgar | 50 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; the sounding from the Mesonet's radiosonde archive.