Alert archive / Illinois / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 53, NWS Lincoln, IL

July 29, 1986McDonough County, Schuyler County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jul 29, 1986, 1:36 AM CDT for McDonough County, Schuyler County, Illinois. It was in force for 27 min.

The area

The counties it named.

The facts

Issued
Jul 29, 1986, 1:36 AM CDT (06:36 UTC)
Expired
Jul 29, 1986, 2:03 AM CDT
In force
27 min
Issued by
NWS Lincoln, IL
Area
Whole counties

Counties McDonough County, IL, Schuyler 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, 6.6 hours before the alert went out and 97 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.

Skew-T log-pSkew-T log-p diagram, Peoria Regional, IL at 00:00Z on 1986-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2172 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peoria Regional, IL at 00:00Z on 1986-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2172 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
1200 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
57 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KPIA 290636
SVRPIA
ILC109-169-290730-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEORIA IL
136 AM CDT TUE JUL 29 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 230 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

WEST CENTRAL ILLINOIS...SOUTHWEST MCDONOUGH AND SCHUYLER

AT 125 AM CDT..RADAR INDICATED A 5 TO 10 MILE WIDE BAND OF
SEVERE THUNDERSTORMS IN WEST CENTRAL ILLINOIS FROM JUST NORTH
OF CARTHAGE SOUTH TO JUST NORTHWEST OF QUINCY ILLINOIS.
.
60 TO 70 MPH WINDS HAVE BEEN REPORTED WITH THIS LINE OF
SEVERE STORMS.
THE STORMS ARE MOVING SOUTHEAST AT 45 MPH.
CITIES AND TOWNS IN AND NEAR THE PATH OF THESE STORMS ARE
COLCHESTER..MACOMB..PLYMOUTH..AUGUSTA..COLMAR..CAMDEN..
BROOKLYN..INDUSTRY..LITTLETON..AND RUSHVILLE.

 THIS IS A DANGEROUS STORM.  TAKE COVER IMMEDIATELY !

 THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH
 LITTLE OR NO ADVANCE WARNING...SO BE ON THE LOOKOUT AND BE
 PREPARED TO MOVE TO A PLACE OF SAFETY IF A TORNADO IS SPOTTED.

ATTN ISP DISTS..14 AND 20

PALMER

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 29, 1:01 AM CDTSevere Thunderstorm WarningILXHancock59 min
Jul 29, 3:13 AM CDTSevere Thunderstorm WarningILXMorgan, Sangamon62 min
Jul 29, 3:53 AM CDTSevere Thunderstorm WarningILXChristian, Montgomery67 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; the sounding from the Mesonet's radiosonde archive.