Alert archive / Missouri / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 27, NWS St. Louis, MO

July 5, 1987Jefferson County, Saint Charles County, Saint Louis County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 5, 1987, 12:30 PM CDT for Jefferson County, Saint Charles County, Saint Louis County, Missouri. It was in force for 60 min. 3 reports 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 5, 1987, 12:30 PM CDT (17:30 UTC)
Expired
Jul 5, 1987, 1:30 PM CDT
In force
60 min
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Jefferson County, MO, Saint Charles County, MO, Saint Louis County, MO

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

TimeReportWhereRemark
Jul 5, 1:30 PM CDTThunderstorm Wind 0Jefferson, MO
Jul 5, 1:33 PM CDTThunderstorm Wind 0St. Charles, MO
Jul 5, 1:35 PM CDTThunderstorm Wind 52Jefferson, MO

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 12:00Z, 5.5 hours before the alert went out and 144 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 1987-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 151 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 1987-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 82 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
151 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
575 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
82 m²/s²
0-3 km storm-relative helicity
121 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 051730
SVRSTL
MOC183-189-099-221-051830-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1230 PM CDT SUN JUL 5 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 130 PM CDT FOR THE FOLLOWING COUNTIES OF
 
EAST CENTRAL MISSOURI... ST. CHARLES... WESTERN ST. LOUIS... WESTERN
   JEFFERSON
 
SOUTHEAST MISSOURI... WASHINGTON
 
AT 1225PM A LINE OF SEVERE THUNDERSTORMS..PRODUCING DAMAGING WINDS...WAS
MOVING INTO THE WARNED COUNTIES.
 
TREES HAVE BEEN UPROOTED IN GERALD..AND NEW HAVEN. POWER LINES ARE
DOWN NEAR UNION.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH
...LARGE HAIL.:..DEADLY LIGHTNING AND VERY HEAVY RAIN.  FOR YOUR
PROTECTION GO TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS.
 
FELDT

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, 7:58 AM CDT, 4 hours 32 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
0745 AM CDT SUN JUL 5 1987

...SEVERE THUNDERSTORM WATCH FOR SOUTHWEST MISSOURI...
...MORE THUNDERSTORMS EXPECTED OVER MUCH OF THE STATE...

THE NATIONAL SEVERE STORMS FORECAST CENTER HAS ISSUED A SEVERE
THUNDERSTORM WATCH FOR THE SOUTHWEST CORNER OF MISSOURI.  A
THUNDERSTORM COMPLEX IS EXPECTED TO SLIDE OUT OF KANSAS AND PRODUCE
HEAVY RAINS...POSSIBLY LARGE HAIL AND DAMAGING WIND TO THAT AREA OF
THE STATE.

ALSO...PART OF THE THUNDERSTORM COMPLEX IS DEVELOPING TOWARD EAST
CENTRAL KANSAS AND WEST CENTRAL MISSSOURI.  THE AIR IS VERY MOIST AND
UNSTABLE OVER THE AREA AND THERE IS ALSO A LEFTOVER THUNDERSTORM
BOUNDARY THAT STRETCHES ACROSS MISSOURI TO JUST SOUTH OF ST LOUIS.
THIS COMBINATION SHOULD BE ENOUGH TO IGNITE A NUMBER OF THUNDERSTORMS
OVER MUCH OF WEST...CENTRAL AND EVENTUALLY EAST CENTRAL MISSOURI.
THIS MAY PUT A DAMPER ON SOME OF THE SCHEDULED HOLIDAY ACTIVITIES
TODAY SUCH AS THE V.P. FAIR ACTIVITIES IN ST LOUIS.  INTERESTED
PERSONS SHOULD MONITOR COMMERCIAL TELEVISION AND RADIO STATIONS OR
LISTEN TO NOAA WEATHER RADIO FOR UPDATED FORECASTS...RADAR SUMMARIES
OR SPECIAL STATEMENTS.

SOME OF THESE STORMS MAY PRODUCE STRONG WINDS...HEAVY RAIN...HAIL AND
INTENSE LIGHTNING.

TUCKER
Special weather statement, Jul 5, 10:23 AM CDT, 2 hours 7 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1020 AM CDT SUN JUL 5 1987

THE PORTION OF SEVERE THUNDERSTORM NUMBER 319 WHICH INCLUDED THE
KANSAS CITY METROPOLITAN AREA HAS BEEN CANCELLED.

REH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 5, 11:39 AM CDTSevere Thunderstorm WarningLSXCrawford, Dent, Phelps51 min
Jul 5, 12:00 PM CDTSevere Thunderstorm WarningLSXFranklin, Warren60 min
Jul 5, 12:30 PM CDTSevere Thunderstorm WarningLSXWashington60 min
Jul 5, 1:06 PM CDTSevere Thunderstorm WarningLSXJefferson, Saint Louis54 min
Jul 5, 1:06 PM CDTSevere Thunderstorm WarningLSXCity of Saint Louis54 min

Nearby

Severe Thunderstorm Warnings in Missouri, 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.