Alert archive / Illinois / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 48, NWS St. Louis, MO

July 7, 1987Bond County, Clinton County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 7, 1987, 3:39 PM CDT for Bond County, Clinton County, Illinois. It was in force for 36 min.

The area

The counties it named.

The facts

Issued
Jul 7, 1987, 3:39 PM CDT (20:39 UTC)
Expired
Jul 7, 1987, 4:15 PM CDT
In force
36 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Bond County, IL, Clinton 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

Salem-Leckrone, IL (KSLO), launched 12:00Z, 8.7 hours before the alert went out and 47 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, Salem-Leckrone, IL at 12:00Z on 1987-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 29 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, Salem-Leckrone, IL at 12:00Z on 1987-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 93 square meters per square second.193958Sfc1 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
29 J/kg
Mixed-layer CIN
-389 J/kg
Mixed-layer LCL
1337 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
93 m²/s²
0-3 km storm-relative helicity
49 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 072042
SVRSTL
ILC005-027-072115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
339 PM CDT TUE JUL 7 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 415 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

SOUTHWEST ILLINOIS...
          CLINTON AND SOUTHEAST BOND

AT 335 PM CDT A SEVERE THUNDERSTORM WAS JUST EAST OF GREENVILLE
ILLINOIS...15 MILES SOUTHWEST OF VANDALIA...ANOTHER WS JUST NORTH
OF BREESE ILLINOIS... 40 MILES EAST OF ST. LOUIS.  THEY WERE MOVING
SOUTHEAST AT 15 MPH.  60 MPH WINDS WERE REPORTED AT GREENVILLE
ILLINOIS AT 335 PM.

BE ALERT FOR DAMAGING WIND...LARGE HAIL AND FREQUENT LIGHT!NING.  STAY
INDOORS AWAY FROM WINDOWS.  AVOID USING THE TELEPHONE AND ELECTRIC
APPLIANCES.  BE ALERT FOR FLOODING OF STREAMS AND LOW AREAS.

MCCARTHY

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 7, 1:13 PM CDT, 2 hours 26 minutes before
SPECIAL WEATHER STATEMENT...CORRECTION FOR MOVEMENT OF STORMS...
NATIONAL WEATHER SERVICE COLUMBIA MO
104 PM CDT TUE JUL 7 1987

...VERY STRONG THUNDERSTORMS MOVING THROUGH CENTRAL MISSOURI...

AT 104 PM CDT A 20 MILE WIDE LINE OF VERY STRONG THUNDERSTORMS
WITH EXTREMELY HEAVY RAIN..GUSTY WINDS OF 40 TO 50 MPH AND
FREQUENT DANGEROUS LIGHTNING EXTENDED FROM 20 MILES NORTHWEST OF
COLUMBIA TO 15 MILES WEST OF COLUMBIA TO 70 MILES SOUTHWEST OF
COLUMBIA. THE STORMS WERE MOVING EAST AT 25 MPH AND WILL BE MOVING
THROUGH THE COLUMBIA AREA BETWEEN 115 AND 215PM. HEAVY RAIN WILL
REDUCE VISIBILITIES TO NEAR ZERO AND CAUSE LOCAL FLOODING OF LOW
LYING AREAS...SMALL CREEKS AND STREAMS AND ROADWAYS. MOTORISTS
SHOULD EXERCISE CAUTION AND NOT ATTEMPT TO CROSS FLOODED  LOW
WATER BRIDGES. NO SEVERE WEATHER WAS INDICATED AT 1PM BUT RESIDENTS
OF CENTRAL MISSOURI SHOULD REMAIN ABREAST OF THE WEATHER SITUATION
AS THE STORMS MAY CONTINUE TO INTENSIFY OVER CENTRAL MISSOURI THIS
AFTERNOON.
HAGEMEYER
Special weather statement, Jul 7, 1:47 PM CDT, 1 hour 52 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE ST LOUIS MO
140 PM CDT TUE JUL 7 1987

AT 130 PM CDT...A NARROW BAND OF STRONG THUNDERSTORMS WAS MOVING
THROUGH EAST CENTRAL MISSOURI. THIS BAND EXTENDED FROM NEAR ST CHARLES
TO UNION.

AS THESE STORMS PASSED THE WEATHER SERVICE OFFICE AROUND 125 PM ABOUT
ONE INCH OF RAIN FELL IN 30 MINUTES. PEA SIZE HAIL ALSO ACCOMPANIED
THESE STORMS. THEY WILL MOVE THROUGH DOWNTOWN ST LOUIS BETWEEN 145 AND
3 PM.

THESE STORMS WERE PART OF AN AREA OF SCATTERED SHOWERS AND THUNDERSTORMS
COVERING PARTS OF THE NORTHERN HALF OF MISSOURI AND WEST CENTRAL
ILLINOIS.

THE RAIN WAS MOVING TO THE SOUTHEAST AT 15 MILES AN HOUR.
HUTSELL
Special weather statement, Jul 7, 2:07 PM CDT, 1 hour 32 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
200 PM CDT TUE JUL 7 1987

...STRONG THUNDERSTORMS CONTINUE MOVING THROUGH CENTRAL MISSOURI...

AT 155 PM A LARGE AREA OF NUMEROUS SHOWERS AND STRONG THUNDERSTORMS
WAS OVER MUCH OF CENTRAL MISSOURI.  THE STRONGEST STORMS WERE IN SOUTH
CENTRAL PARTS OF THE AREA AROUND ELDON AND THE LAKE OF THE OZARKS OR
ABOUT 30 TO 40 MILES SOUTHWEST OF JEFFERSON CITY.  THE THUNDERSTORM
AREA WAS MOVING SOUTHEAST AT ABOUT 25 MPH.

HEAVY RAIN WILL REDUCE VISIBILITIES TO NEAR ZERO AND MAY CAUSE LOCAL
FLOODING OF LOW LYING AREAS...SMALL CREEKS AND STREAMS AND ROADWAYS.
MOTORISTS SHOULD EXERCISE CAUTION AND NOT ATTEMPT TO CROSS FLOODED
LOW WATER BRIDGES. NO SEVERE WEATHER WAS INDICATED AT 2PM BUT GUSTY
WINDS OF 30 TO 40 MPH MAY ACCOMPANY SOME OF THESE STORMS AONG WITH
THE HEAVY RAINS AND DANGEROUS LIGHTNING.
LARM
Special weather statement, Jul 7, 2:46 PM CDT, 53 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE ST LOUIS MO
245 PM CDT TUE JUL 7 1987

AT 235 PM CDT...A BAND OF STRONG THUNDERSTORMS STRETCHED FROM THE LAKE
OF THE OZARKS IN SOUTH CENTRAL MISSOURI THROUGH DOWNTOWN SAINT LOUIS
INTO SOUTHERN ILLINOIS.

THESE STORMS WILL PRODUCE VERY HEAVY RAIN...SMALL HAIL...AND GUSTY
WINDS AS THEY MOVE TO THE SOUTHEAST AT 15 MILES AN HOUR.

OTHER NUMEROUS SHOWERS AND THUNDERSTORMS WERE OVER MUCH OF CENTRAL
MISSOURI...FROM 30 MILES SOUTH OF KIRKSVILLE THROUGH COLUMBIA TO NEAR
FORT LEONARD WOOD.

THE RAIN WAS MOVING TO THE SOUTHEAST AT 15 MILES AN HOUR.
HUTSELL
Special weather statement, Jul 7, 3:07 PM CDT, 32 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
300 PM CDT TUE JUL 7 1987

...STRONG THUNDERSTORMS MOVING THROUGH SOUTH CENTRAL MISSOURI...

AT 255 PM A LINE OF STRONG THUNDERSTORMS WAS MOVING THROUGH SOUTH
PATS OF CENTRAL MISSOURI IN A 30 MILE WIDE AREA FROM AROUND HERMITAGE..
OR ABOUT 40 MILES NORTH OF SPRINGFIELD..TO ROLLA.  THE LINE OF THUNDER-
STORMS WAS MOVING SOUTHEAST AT ABOUT 25 MPH.

HEAVY RAIN WILL REDUCE VISIBILITIES TO NEAR ZERO AND MAY CAUSE LOCAL
FLOODING OF LOW LYING AREAS...SMALL STREAMS AND ROADWAYS.  MOTORISTS
SHOULD EXERCISE CAUTION AND NOT ATTEMPT TO CROSS FLOODED LOW WATER
BRIDGES. NO SEVERE WEATHER WAS INDICATED AT 3PM BUT GUSTY WINDS OF 30
TO 40 MPH MAY ACCOMPANY SOME OF THESE STORMS ALONG WITH THE HEAVY RAINS
AND DANGEROUS LIGHTNING.
LARM
Special weather statement, Jul 7, 3:25 PM CDT, 14 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
325 PM CDT TUE JUL 7 1987

...SEVERE THUNDERSTORM WATCH TIL 9 PM FOR MUCH OF SOUTH AND EAST
CENTRAL MISSOURI AND SOUTHERN ILLINOIS...

AT 320 PM A LINE OF VERY STRONG THUNDERSTORMS STRETCHED FROM JUST
WEST OF VANDALIA ILLINOIS...60 MILES EAST OF ST. LOUIS...THROUGH
BELLEVILLE ILLINOIS...ACROSS JEFFERSON COUNTY MISSOURI...SOUTH OF
ST. LOUIS...TO ROLLA MISSOURI.  THE STORMS WERE MOV	ING SOUTHEAST
AT 15 MPH AND WILL PRODUCE BRIEF VERY HEAVY RAIN...STRONG WINDS
AND POSSIBLY HAIL.  NO REPORTS OF SEVERE WEATHER HAVE BEEN
RECEIVED ALONG THIS LINE OF STORMS AS OF 315 PM.

MCCARTHY

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.