Alert archive / Illinois / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 45, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Jul 8, 1987, 6:56 PM CDT for Ogle County, Illinois. It was in force for 49 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
- Jul 8, 1987, 6:56 PM CDT (23:56 UTC)
- Expired
- Jul 8, 1987, 7:45 PM CDT
- In force
- 49 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
County Ogle 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 |
|---|---|---|---|
| Jul 8, 7:40 PM CDT | Thunderstorm Wind 0 | Ogle, 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, 11.9 hours before the alert went out and 154 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
- 372 J/kg
- Mixed-layer CIN
- -91 J/kg
- Mixed-layer LCL
- 1006 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -53 m²/s²
- 0-3 km storm-relative helicity
- -45 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 KRFD 082356 SVRRFD ILC141-090045- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ROCKFORD IL 656 PM CDT WED JUL 8 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 745 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF NORTH CENTRAL ILLINOIS...OGLE AT 655 PM CDT RADAR INDICATED A SEVERE THUNDER SOUTHWEST OF OREGON ILLINOIS ABOUT 25 MILES SOUTHWEST OF ROCKFORD. MOVEMENT OF THIS SEVERE THUNDERSTORM WAS NORTHEAST AT 30 MPH. SOME COMMUNITIES AFFECTED BY THIS SEVERE THUNDERSTORM... FORRESTON.. LIGHTSVILLE.. MT. MORRIS... OREGON... BYRON... 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.. PIERCE
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, Jul 8, 6:03 PM CDT, 53 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 600 PM CDT WED JUL 8 1987 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR ALL OF NORTHCENTRAL ILLINOIS UNTIL 1000 PM CDT... NO SEVERE WEATHER HAS BEEN REPORTED IN NORTH CENTRAL ILLINOIS. HOWEVER...ISOLATED THUNDERSTORMS...SOME HEAVY...WERE INDICATED BY RADAR ACROSS NORTHWEST AND WEST CENTRAL ILLINOIS. THESE STORMS WERE LOCATED WEST OF A LINE FROM NEAR STERLING TO 12 MILES NORTHEAST OF MACOMB. MOVEMENT OF THESE STORMS WAS TO THE NORTH...NORTHEAST AT 30 MILES AN HOUR. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE RIGHT FOR THE FORMATION OF SEVERE THUNDERSTORMS IN AND CLOSE TO WATCH AREA. NADOLSKI
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.