Alert archive / Illinois / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 55, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Jul 29, 1986, 3:53 AM CDT for Christian County, Montgomery County, Illinois. It was in force for 67 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 29, 1986, 3:53 AM CDT (08:53 UTC)
- Expired
- Jul 29, 1986, 5:00 AM CDT
- In force
- 67 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
Counties Christian County, IL, Montgomery 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 29, 3:55 AM CDT | Thunderstorm Wind 0 | Christian, 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
Salem-Leckrone, IL (KSLO), launched 00:00Z, 8.9 hours before the alert went out and 92 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
- 4371 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 908 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSPI 290853 SVRSPI ILC021-135-291000- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SPRINGFIELD IL 353 AM CDT TUE JUL 29 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 500 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF CENTRAL ILLINOIS...CHRISTIAN AND NORTHERN MONTGOMERY AT 355AM, A SEVERE THUNDERSTORM WAS 15 MILES SOUTH OF SPRINGFIELD NEAR PAWNEE. IT WAS MOVING RAPIDLY TOWARD THE SOUTHEAST AT 40 TO 50 MPH. AS THESE STORMS MOVED THROUGH MORGAN AND SANGAMON COUNTIES... LARGE TREES WERE REPORTED UPROOTED BY HIGH WINDS. PERSONS IN VULNERABLE AREAS SHOULD TAKE PRECAUTIONS FOR HIGH WINDS. REMEMBER..A SEVERE THUNDERSTORM PRODUCES DAMAGING WINDS IN EXCESS OF 60 MPH...LARGE HAIL...DEADLY LIGHTNING AND HEAVY RAINS THAT CAN QUICKLY FLOOD A LOW LYING AREA. IF THREATENING WEATHER APPROACHES...YOU SHOULD GO TO A SAFE PLACE. ASK rTHE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR REPORT OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE. ATTN ISP DIST..9 18 FS
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 29, 2:42 AM CDT, 1 hour 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SPRINGFIELD IL 235 AM CDT TUE JUL 29 1986 ...SEVERE THUNDERSTORM WATCH 426 IN EFFECT UNTIL 6AM CDT... ...THUNDERSTORMS PASSING THROUGH CASS AND MORGAN COUNTIES... AT 230 AM CDT THUNDERSTORMS PRODUCING HEAVY RAIN AND GUSTY WINDS WERE PASSING THROUGH THE CENTRAL ILLINOIS COUNTIES OF CASS AND MORGAN. THESE THUNDERSTORMS HAVE WEAKENED SOMEWHAT IN INTENSITY DURING THE LAST HOUR..AS THEY PASSED THROUGH RUSHVILLE IN SCHUYLER COUNTY, THEY PRODUCED WIND GUSTS TO 50 MPH. PERSONS IN CASS AND MORGAN COUNTIES SHOULD REMAIN ON THE ALERT, HOWEVER, FOR THE CHANCE OF REINTENSIFICATION. THE THUNDERSTORMS WERE MOVING TOWARD THE SOUTHEAST AT 40 TO 50 MPH. :THE THUNDERSTORMS WILL BE IN WESTERB SANGAMON AND MACOUPIN COUNTIES BY 4AM. FS
Special weather statement, Jul 29, 2:44 AM CDT, 1 hour 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 245 AM CDT TUE JUL 29 1986 ...TORNADO WATCH CANCELLED FOR COUNTIES IN NORTH CENTRAL ILLINOIS... THE TORNADO WATCH FOR THE NORTH CENTRAL ILLINOIS COUNTIES OF KNOX.. WARREN..HENDERSON..HANCOCK..MC DONOUGH..FULTON..AND SCHUYLER WAS CANCELLED AT 230 AM CDT. THE LINE OF SEVERE STORMS THAT MOVED THROUGH THESE COUNTIES HAD WEAKENED AND MOVED TO BETWEEN SPRINGFIELD AND QUINCY ILLINOIS AT 230 AM. A LARGE AREA OF THUNDERSHOWERS AND RAIN WAS OVER NORTH CENTRAL ILLINOIS FROM MOLINE TO BETWEEN PEORIA AND BLOOMINGTON TO SPRINGFIELD. THE WESTERN EDGE WAS ALONG THE MISSISSIPPI RIVER. THE LINE OF SEVERE STORMS PRODUCED DAMAGING WINDS OF 60 TO 70 MPH WINDS AT KEOKUK IOWA AND HAMILTON ILLINOIS JUST ACROSS THE RIVER FROM KEOKUK AT AROUND 100 AM. CONSIDERABLE INTERRUPTION TO POWER DUE TO DOWNED TREE LIMBS WAS REPORTED. 50 TO 60 MPH WINDS CONTINUED THROUGH CARTHAGE ILLINOIS AND RAEACHED MACOMB JUST BEFORE 200 AM. RUSHVILLE ILLINOIS REPORTED 50 MPH WINDS AT 222 AM. ATTN ISP DISTS..7..8..9..14..AND 20 PALMER
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 1:01 AM CDT | Severe Thunderstorm Warning | ILX | Hancock | 59 min |
| Jul 29, 1:36 AM CDT | Severe Thunderstorm Warning | ILX | McDonough, Schuyler | 27 min |
| Jul 29, 3:13 AM CDT | Severe Thunderstorm Warning | ILX | Morgan, Sangamon | 62 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.