Alert archive / Illinois / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 72, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Aug 16, 1987, 9:17 PM CDT for Logan County, Menard County, Sangamon County, Illinois. It was in force for 58 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
- Aug 16, 1987, 9:17 PM CDT (02:17 UTC)
- Expired
- Aug 16, 1987, 10:15 PM CDT
- In force
- 58 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
Counties Logan County, IL, Menard County, IL, Sangamon 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 |
|---|---|---|---|
| Aug 16, 9:32 PM CDT | Thunderstorm Wind 70 | Sangamon, 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 00:00Z, 2.3 hours before the alert went out and 78 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
- 2574 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 1422 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 185 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 6.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSPI 170217 SVRSPI ILC129-167-107-170315- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SPRINGFIELD IL 917 PM CDT SUN AUG 16 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF CENTRAL ILLINOIS...MENARD...SANGAMON AND LOGAN AT 910 PM CDT WEATHER SERVICE RADAR SHOWED A LINE OF SEVERE THUNDER STORMS FROM 30 MILES NORTH OF SPRINGFIELD TO 20 MILE WEST OF SPRINGFIELD. THE LINE OF SEVERE THUNDERSTORMS 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. THIS SLOW MOVING THUNDERSTORM MAY CAUSE FLOODING OF SMALL STREAMS AND UNDERPASSES. THIS IS A DANGEROUS STORM. TAKE COVER IMMEDIATELY. ATTN ISP DIST...9 HILLIARD
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, Aug 16, 3:51 PM CDT, 5 hours 26 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 350 PM CDT SUN AUG 16 1987 ...TORNADO WATCH CONTINUES FOR WEST CENTRAL ILLINOIS... A TORNADO WATCH CONTINUES IN EFFECT UNTIL 1000 PM CDT FOR HENDERSON AND HANCOCK COUNTINES IN WEST CENTRAL ILLINOIS. NO SEVERE WEATHER HAD BEEN REPORTED IN THESE COUNTIES UP UNTIL 345 PM. WARM..UNSTABLE AIR OVER NORTHERN MISSOURI..EASTERN IOWA AND WESTERN ILLINOIS WAS AHEAD OF A COLD FRONT MOVING EAST THROUGH IOWA. THIS CONDITION COULD SEE A RAPID DEVELOPEMENT OF THUNDERSTORMS OVER WEST CENTRAL ILLINOIS BETWEEN 400 PM AND 600 PM. KEEP AN EYE ON THE SKY FOR THUNDERSTORM DEVELOPEMENT AND WATCH TELEVISION OR LISTEN TO RADIO FOR ADDITIONAL STATsEMENTS AND POSSIBLE WARNINGS. PALMER ATTN ISP DIST 14
Special weather statement, Aug 16, 5:42 PM CDT, 3 hours 35 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 540 PM CDT SUN AUG 16 1987 ...THUNDERSTORMS APPROACHING WEST CENTRAL ILLINOIS SOUTH OF BURLINGTON IOWA... AT 535 PM..RADAR INDICATED A RAPIDLY DEVELOPING BAND OF THUNDERSTORMS IN AN AREA FROM KIRKSVILLE MISSOURI TO OTTUMA IOWA TO BURLINGTON IOWA AND BACK TO KIRKSVILLE. THE BAND OF STORMS WAS MOVING EAST AT ABOUT 20 TO 25 MPH TOWARD THE MISSISSIPPI RIVER AND SHOULD BE EDGING INTO WESTERN ILLINOIS BY AROUND 630 PM. HANCOCK AND HENDERSON COUNTIES IN WEST CENTRAL ILLINOIS ARE IN A TORNADO WATCH UNTIL 1000 PM CDT. PEOPLE IN THESE COUNTIES SHOULD STAY ALERT FOR THE APPROACH OF THESE THUNDERSTORMS AND HAVE A PLAN OF SAFETY IN MIND SHOULD YOU NEED TO QUICKLY MOVE TO A SUBSTANTIAL SHELTER. THESE STORMS WILL BRING DANGEROUS LIGHTNING..POSSIBLE BRIEF GUSTY WINDS TO 50 MPH..HAIL AND HEAVY RAIN. PALMER ATTN ISP DIST 14
Special weather statement, Aug 16, 6:54 PM CDT, 2 hours 23 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 655 PM CDT SUN AUG 16 1987 ...STRONG THUNDERSTORM ENTERING WEST CENTRAL ILLINOIS NEAR BURLINGTON IOWA... AT 645 PM..RADAR INDICATED A STRONG THUNDERSTORM ON THE WEST EDGE OF BURLINGTON IOWA. THIS STORM WAS MOVING NORTHEAST AT 45 MPH AND WILL BE MOVING ACROSS THE NORTHERN HALF OF HENDERSON COUNTY AND THE COMMUNITY OF OQUAWKA BETWEEN 655 PM AND 730 PM. PEOPLE IN THE NORTHERN HALF OF HENDERSON COUNTY SHOULD TAKE SHELTER IN A SUBSTANTIAL BUILDING AS THIS STORM APPROACHES. EXPECT FREQUENT DANGEROUS LIGHTNING..BRIEF GUSTY WINDS TO AROUND 50 MPH..HAIL AND HEAVY RAIN. OTHER STRONG THUNDERSTORMS WERE ENTERING THE SOUTHWEST CORNER OF HANCOCK COUNTY SOUTH OF WARSAW ILLINOIS AND KEOKUK IOWA. THESE STORMS WERE ALSO MOVING NORTHEAST AT 45 MPH TOWARD CARTHAGE AND THE CENTRAL AND EASTERN PARTS OF HANCOCK COUNTY. PEOPLE IN THESE AREAS SHOULD ALSO TAKE SHELTER IN A SUBSTANTIAL BUILDING AS THESE STORMS APPROACH. ...HANCOCK AND HENDERSON COUNTIES REMAIN IN A TORNADO WATCH UNTIL 900 PM CDT... ...MUCH OF THE REMAINDER OF NORTH CENTRAL ILLINOIS IS IN A SEVERE THUNDERSTORM WATCH UNTIL MIDNIGHT... PALMER ATTN ISP DIS#TS 14 AND 7
Special weather statement, Aug 16, 7:39 PM CDT, 1 hour 38 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 740 PM CDT SUN AUG 16 1987 ...STRONG THUNDERSTORMS IN WEST CENTRAL ILLINOIS WEST OF GALESBURG AND MACOMB... AT 730 PM..RADAR INDICATED STRONG THUNDERSTORMS IN WEST CENTRAL ILLINOIS BETWEEN MONMOUTH ILLINOIS AND BURLINGTON IOWA. OTHER STRONG STORMS WERE FROM CARTHAGE ILLINOIS WHICH IS ABOUT 30 MILES WEST SOUTHWEST OF MACOMB SOUTHWEST TO QUINCY ILLINOIS. THESE WERE PART OF A 10 MILE WIDE BAND OF STORMS THAT EXTENDED FROM THE NORTHWEST CORNER OF ILLINOIS TO JUST EAST OF MOLINE TO QUINCY AND INTO EAST CENTRAL MISSOURI. THE BAND OF STORMS WAS MOVING EAST AT ABOUT 20 MPH WHILE THE INDIVIDUAL STORMS WERE MOVING NORTHEAST AT 45 MPH. DANGEROUS LIGHTNING..BRIEF GUST WINDS TO 45 OR 50 MPH..SMALL HAIL AND HEAVY RAIN ARE ASSOCIATED WITH THESE STORMS. PEOPLE IN HANCOCK..MC DONOUGH..WARREN..KNOX AND SCHUYLER COUNTIES SHOULD TAKE SHELTER AS THESE STORMS APPROACH. WINDS WILL BE STRONG ENOUGH TO BREAK TREE BRANCHES AND CAUSE POSSIBLE DOWNING OF SOME POWER AND TELEPHONE LINES. A TORNADO WATCH CONTINUES IN EFFECT FOR HENDERSON AND HANCOCK COUNTIES UNTIL 900 PM CDT. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MUCH OF PNORTH CENTRAL ILLINOIS UNTIL MIDNIGHT. PALMER ATTN ISP DISTS..7..8..14..AND 20
Special weather statement, Aug 16, 8:27 PM CDT, 50 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 825 PM CDT SUN AUG 16 1987 ...STRONG THUNDERSTORMS IN NORTH CENTRAL ILLINOIS SOUTHWEST OF PEORIA... AT 820 PM..RADAR INDICATED A 5 TO 10 MILE WIDE BAND OF STRONG THUNDERSTORMS FROM ABOUT 35 MILES SOUTHWEST OF PEORIA ON THE SOUTH EDGE OF CUBA EXTENDING TO RUSHVILLE AND PITTSFIELD. THIS BAND OF STORMS WAS MOVING EAST AT ABOUT 25 TO 30 MPH AND WILL BE MOVING ACROSS THE SOUTHERN HALF OF FULTON COUNTY INTO MASON AND SOUTHERN TAZEWELL COUNTIES BETWEEN 830 AND 930 PM. BE PREPARED TO TAKE SHELTER IN A SUBSTANTIAL BUILDING AS THESE STORMS APPROACH. THEY WILL HAVE FREQUENT DANGEROUS LIGHTNING.. BRIEF GUSTY WINDS TO 45 TO 50 MPH..AND HEAVY RAIN. ...A TORNADO WATCH CONTINUES IN EFFECT UNTIL 900 PM CDT FOR HANCOCK AND HENDERSON COUNTINES IN WEST CENTRAL ILLINOIS... ...AND A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MOST OF NORTH CENTRAL ILLINOIS UNTIL MIDNIGHT... OTHEzR SHOWERS AND THUNDERSTORMS EXTEND IN A 35 MILE WIDE BAND FROM JUST WEST OF PEORIA THROUGH BRADFORD AND PRINCETON INTO NORTHERN ILLINOIS. PALMER ATTN ISP DISTS 7..8..9..14..17 AND 20
Special weather statement, Aug 16, 8:32 PM CDT, 45 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SPRINGFIELD IL 830 PM CDT SUN AUG 16 1987 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PORTIONS OF ILLINOIS NORTH OF PEORIA UNTIL MIDNIGHT CDT... AT 825 PM CDT RADAR INDICATED STRONG THUNDERTORMS MOVING EAST INTO CASS AND MORGAN COUNTIES ILLINOIS...NEAR MEREDOSIA AND NORTH OF MEREDOSIA. THESE WERE MOVING EAST AT 25 MILES AN HOUR AND MAY PRODUCE STRONG WINDS...HEAVY RAIN...DANGEROUS LIGHTNING AND POSSIBLY SOME HAIL. OTHER SHOWERS AND THUNDERSTORMS EXTENDED FROM HARDIN TO CHANDLERVILLE TO PEORIA AND ON INTO NORTHERN ILLINOIS. THESE WERE MOVING EAST AT ABOUT 20 MILES AN HOUR. IF THREATENING WEATHER APPROACHES YOUR AREA...BE CAUTIOUS AND SEEK SHELTER. REEDY
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 10:06 PM CDT | Severe Thunderstorm Warning | ILX | DeWitt, Macon | 69 min |
| Aug 16, 10:31 PM CDT | Severe Thunderstorm Warning | ILX | Menard, Sangamon | 59 min |
| Aug 16, 10:40 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Piatt | 65 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.