Alert archive / Illinois / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 33, NWS St. Louis, MO

July 5, 1987Saint Charles County, Missouri; Calhoun County, Jersey County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 5, 1987, 8:09 PM CDT for Saint Charles County, Missouri; Calhoun County, Jersey County, Illinois. It was in force for 36 min.

The area

The counties it named.

The facts

Issued: Jul 5, 1987, 8:09 PM CDT (01:09 UTC)
Expired: Jul 5, 1987, 8:45 PM CDT
In force: 36 min
Issued by: NWS St. Louis, MO
Area: Whole counties

Counties Calhoun County, IL, Jersey County, IL, Saint Charles County, MO

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 00:00Z, 1.2 hours before the alert went out and 150 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 7 J/kg
Mixed-layer CIN: -510 J/kg
Mixed-layer LCL: 1876 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 124 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 060109
SVRSTL
ILC013-083-MOC183-060145-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
809 PM CDT SUN JUL 5 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 845 PM CDT FOR THE FOLLOWING COUNTIES OF
 
SOUTHWEST ILLINOIS... SOUTHERN CALHOUN... JERSEY
 
EAST CENTRAL MISSOURI... EASTERN ST. CHARLES
 
AT 805 PM RADAR SHOWED A SEVERE THUNDERSTORM JUST WEST OF ST. CHARLES
MISSOURI...OR ABOUT 25 MILES NORTHWEST OF ST. LOUIS.  THE STORM WAS
MOVING TO THE EAST NORTHEAST AT 40 MPH.
 
HALF INCH HAIL WAS REPORTED AT OFALLON MISSOURI IN ST. CHARLES
COUNTY JUST AFTER 8 PM.
 
PROTECT YOURSELF FROM DAMAGIN*G WINDS...LARGE HAIL AND LIGHTNING
BY STAYING IN A BUILDING...AWAY FROM WINDOWS.  DO NOT USE THE
TELEPHONE OR ELECTRICAL APPLIANCES...EXCEPT IN EMERGENCIES.
 
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 5, 2:26 PM CDT, 5 hours 43 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
220 PM CDT SUN JUL 5 1987

... SPECIAL V.P. FAIR FORECAST ...
... SOME BETTER NEWS .. A LITTLE LATER ...

AT 2PM NATIONAL WEATHER SERVICE RADAR INDICATED WIDESPREAD SHOWERS
AND THUNDERSTORMS ACROSS EAST CENTRAL MISSOURI INTO CENTRAL ILLINOIS.

THE STRONGEST THUNDERSTORMS HAVE NOW MOVED INTO CENTRAL ILLINOIS AND
POSE NO THREAT TO V.P. ACTIVITIES. NO WARNINGS OR WATCHES ARE IN EFFECT
FOR THE ST LOUIS METRO AREA.

WIDESPREAD SHOWERS WILL CONTINUE OVER THE FAIR GROUNDS UNTIL AROUND
4PM.
THEREAFTER...FOR THIS EVENINGS ACTIVITIES..THE SHOWERS SHOULD BECOME
MUCH MORE SCATTERED ALONG WITH COOLER TEMPERATURES.

FELDT

Special weather statement, Jul 5, 3:17 PM CDT, 4 hours 52 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
315 PM CDT SUN JUL 5 1987

THE PORTION OF SEVERE THUNDERSTORM WATCH NUMBER 320 WHICH INCLUDED
THE MISSOURI BOOTHEEL HAS BEEN CANCELLED,

SCATTERED THUNDERSTORMS WILL CONTINUE INTO EARLY TONIGHT.

Local storm report, Jul 5, 3:29 PM CDT, 4 hours 40 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
315 PM CDT SUN JUL 5 1987

STORM REPORT

1205 PM CDT...TREES DOWN FROM WINDS E 65 MPH..HAIL 1/2 INCH NEAR ROLLA.
     REPORT FROM ANNOUNCER AT KTTR ROLLA RADIO STATION.

NOON CDT..WIND 45 MPH AT STEELVILLE IN CRAWFORD CO MO..NO DAMAGE

AROUND NOON...TREES DOWN IN EXTREME N CRAWFORD CO MO.  ABOUT 5 N CUBA
   MO.  REPORT RELAYED FROM GASCNADE SHERIFF OFFICE.

1210 PM...DAMAGING WINDS IN NORTHERN DENT COUNTY AND CITY OF SALEM MO.
   WINDS ESTIMATED AT 60 MPH WITH LARGE TREE LIMBS DOWN.  REPORT FROM
   SHERIFF OFFICE.

135 PM...SOME TREES BLOWN DOWN WITH WINDS E 55 TO 60 MPH NEAR HIGH
   RIDGE IN NORTHERN JEFFERSON COUNTY MISSOURI. SMALL HAIL REPORTED.
>
1244 PM CDT...WIND GUST TO 53 MPH SPIRIT AIRPORT IN ST LOUIS COUNTY.

 133 PM CDT...LARGE TREE LIMBS DOWN AND POWER LINES DOWN IN ST CHARLES
    COUNTY ABOUT 10 MILES EAST OF WASHINGTON MO.  HEAVY RAINS.

142 PM CDT...WIND TO 37 M&PH AT BELLEVILLE ILLINOIS..44MPH AT SCOTT AFB
      AND 35 MPH AT LENZBURG ILL.

145PM CDT...PEA SIZE HAIL IN NEW DOUGLAS ILLINOIS IN MADISON COUNTY.

HAMILTON

Special weather statement, Jul 5, 7:59 PM CDT, 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
755 PM CDT SUN JUL 5 1987

...STRONG THUNDERSTORMS NORTHWEST OF ST. LOUIS...

JUST BEFORE 8 PM CDT...TWO STRONG THUNDERSTORMS WERE 25 TO 50 MILES
NORTHWEST OF ST. LOUIS.  ONE WAS IN WESTERN ST. CHARLES COUNTY...
BETWEEN WENTZVILLE AND WELDON SPRING.  THE OTHER WAS JUST
NORTHEAST OF TROY MISSOURI IN LINCOLN COUNTY.

THEY WERE MOVING TO THE EAST NORTHEAST AT 40 MPH AND COULD PRODUC#E
HEAVY RAIN...GUSTY WINDS AND FREQUENT LIGHTNING.

THE MOVEMENT OF THESE TWO STORMS SHOULD TAKE THEM NORTH OF DOWNTOWN
ST. LOUIS...INTO CALHOUN AND JERSEY COUNTIES OF ILLINOIS... WITHOUT
INTERRUPTING ACTIVITIES AT THE VP FAIR.

MCCARTHY

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 6, 10:47 AM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	25 min
Jul 6, 3:10 PM CDT	Severe Thunderstorm Warning	LSX	Pike	50 min
Jul 6, 4:14 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	46 min
Jul 6, 4:24 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles	51 min
Jul 6, 5:20 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, Warren	40 min
Jul 6, 5:20 PM CDT	Severe Thunderstorm Warning	LSX	City of Saint Louis	40 min
Jul 6, 11:20 AM CDT	Severe Thunderstorm Warning	LSX	Saint Clair	55 min
Jul 6, 12:00 PM CDT	Severe Thunderstorm Warning	LSX	Clinton, Saint Clair, Washington	60 min
Jul 6, 1:05 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Marion, Washington	40 min
Jul 6, 3:24 PM CDT	Severe Thunderstorm Warning	LSX	Greene	39 min
Jul 6, 4:55 PM CDT	Severe Thunderstorm Warning	LSX	Saint Clair	35 min
Jul 6, 5:26 PM CDT	Severe Thunderstorm Warning	LSX	Fayette	64 min
Jul 6, 5:52 PM CDT	Severe Thunderstorm Warning	LSX	Effingham	53 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1987 Severe Thunderstorm Warnings in Missouri, 1987 Every 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.