Alert archive / Missouri / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 55, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Aug 8, 1987, 9:30 PM CDT for City of Saint Louis, Missouri; Saint Clair County, Illinois. It was in force for 60 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
- Aug 8, 1987, 9:30 PM CDT (02:30 UTC)
- Expired
- Aug 8, 1987, 10:30 PM CDT
- In force
- 60 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
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 |
|---|---|---|---|
| Aug 8, 9:40 PM CDT | Thunderstorm Wind 61 | St. Clair, 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, 2.5 hours before the alert went out and 102 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
- 2058 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 1149 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 090330 SVRSTL MOC510-ILC163-090330- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 930 PM CDT SAT AUG 8 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1030 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF EAST CENTRAL MISSOURI...ST LOUIS CITY. SOUTHERN ILLINOIS...ST CLAIR COUNTY. AT 925 PM CDT A SEVERE THUNDERSTORM WAS INDICATED BY RADAR OVER THE CITY OF ST LOUIS. THE STORM WAS MOVING EAST AT 40 MPH. WINDS TO 60 TO 70 MPH ARE LIKELY WITH THIS STORM. < BE ALERT FOR DAMAGING WIND...LARGE HAIL AND FREQUENT LIGHTNING. STAY INDOORS AWAY FROM WINDOWS. AVOID USING THE TELEPHONE AND ELECvTRIC APPLIANCES. BE ALERT FOR FLOODING OF STREAMS AND LOW AREAS. TUCKER
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, Aug 8, 6:07 PM CDT, 3 hours 23 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 555 PM CDT SAT AUG 8 1987 ...STRONG THUNDERSTORMS OVER PORTIONS OF EAST CENTRAL MISSOURI... AT 552 PM CDT...RADAR INDICATED A DEVELOPING LINE OF THUNDERSTORMS FROM JUST NEAR CHAMOIS MISSOURI WHICH IS 70 MILES WEST OF ST LOUIS TO 12 MILES WEST OF ELSBERRY...OR ABOUT 45 MILES NORTHWEST OF ST LOUIS. THE STORMS WERE MOVING EAST AT 20 MPH. SOME OF THESE STORMS ARE LIKELY TO HAVE WIND GUSTS OF 40 TO 50 MPH AND BRIEF HEAVY RAIN. THE STORMS WILL PASS THROUGH MUCH OF EAST CENTRAL MISSOURI BETWEEN 6 PM AND 9 PM THIS EVENING. THE NORTHERN PORTION OF THE ST LOUIS METROPOLITAN AREA SHOULD EXPERIENCE THESE THUNDERSTORMS BETWEEN 730 AND 9 PM. ADDITIONAL DEVELOPMENT IS PREDICTED SO OTHER PORTIONS OF EAST CENTRAL MISSOURI...INCLUDING ALL OF THE METROPOLITAN AREA SHOULD RECEIVE THUNDERSTORMS THIS EVENING. < TUCKER
Special weather statement, Aug 8, 6:30 PM CDT, 3 hours before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 625 PM CDT SAT AUG 8 1987 ...STRONG THUNDERSTORMS OVER EXTREME NORTHEAST MISSOURI... A CLUSTER OF THUNDERSTORMS EXTENDS OUT OF IOWA TO JUST NORTH OF KIRKSVILLE. THESE STORMS WILL MOVE ACROSS THE EXTREME NORTHEAST CORNER OF MISSOURI BETWEEN 630 AND 830 PM. THE TOWNS OF MEMPHIS ...LURAY AND KAHOKA WHICH ARE ALL 25 TO 40 MILES NORTHEAST OF KIRKSVILLE. BRIEF HEAVY RAIN AND STRONG GUSTY WINDS ARE LIKELY WITH THESE STORMS. TUCKER
Special weather statement, Aug 8, 6:34 PM CDT, 2 hours 56 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 630 PM CDT SAT AUG 8 1987 ...STRONG WINDS IN EAST CENTRAL MISSOURI... THE LINE OF THUNDERSTORMS IN EAST CENTRAL MISSOUR WAS CONTINUE TO DEVELOP AND MOVE EAST. TROY MISSOURI...WHICH IS ABOUT 30 MILES NORTHWEST OF ST LOUIS WAS RECEIVING HIGH WINDS AND HEAVY RAIN AT 625 PM. THE SHERIFF REPORTED BRIEF POWER OUTAGE IN TROY. TUCKER
Special weather statement, Aug 8, 7:00 PM CDT, 2 hours 30 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 655 PM CDT SAT AUG 8 1987 ...STRONG THUNDERSTORMS CONTINUE OVER EAST CENTRAL MISSOURI... AT 654 PM CDT...A LINE OF THUNDERSTORMS EXTENDED FROM NEAR JEFFERSON CITY MISSOURI TO NEAR WHITE HALL...ILLINOIS OR ABOUT 45 MILES NORTH OF ST LOUIS. THE STRONGEST STORM WAS NEAR WARRENTON...MISSOURI OR ABOUT 50 MILES WEST...NORTHWEST OF ST LOUIS. ONE STORM PRODUCED HIGH WIND AND HEAVY RAIN IN TROY MISSOURI AT 630 PM. THE STORMS WILL CONTINUE MOVING EAST AT 30 MPH THROUGH EAST CENTRAL MISSOURI AND PORTIONS OF SOUTHERN ILLINOIS BETWEEN 7 AND 9 PM. THEY WILL PRODUCE LOCALLY HEAVY RAIN...SMALL HAIL AND WIND GUSTS 30 TO 50 MPH. THE STORMS WILL MOVE THROUGH THE ST LOUIS METROPOLITAN AREA BETWEEN 730 AND 9 PM. < TUCKER
Special weather statement, Aug 8, 8:04 PM CDT, 1 hour 26 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 758 PM CDT SAT AUG 8 1987 ...THUNDERSTORM WINDS TO 50 MPH IN ST LOUIS AREA... AT 755 PM CDT...A LINE OF THUNDERSTORMS EXTENDED ACROSS WESTERN ST LOUIS COUNTY TO THE NORTHERN PORTION OF THE ST LOUIS METROPOLITAN AREA. THE STORMS WERE MOVING EAST AT 30 MPH. VERY HEAVY RAIN WAS FALLING AT THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN ST PETERS MISSOURI AT 755 AND THE WIND HAD GUSTED/ TO 50 MPH. THE STORMS WILL CONTINUE MOVING ACROSS EAST CENTRAL MISSOURI AND ADJACENT PORTIONS OF SOUTHERN ILLINOIS. THE STORMS WILL PERSIST UNTIL ABOUT 930 OVER THE METROPOLITAN ST LOUIS AREA. TUCKER
Special weather statement, Aug 8, 9:10 PM CDT, 20 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 858 PM CDT SAT AUG 8 1987 ...THUNDERSTORMS WITH STRONG WINDS CONTINUE ACROSS EASTERN MISSOURI... AT 855 PM CDT...RADAR INDICATED A LINE OF THUNDERSTORMS FROM ABOUT 75 MILES SOUTHWEST OF ST LOUIS..NORTHEAST THROUGH THE CITY OF ST LOUIS AND WELL INTO SOUTH CENTRAL ILLINOIS. IN FACT THIS LINE OF THUNDERSTORMS HAD JOINED UP WITH A CLUSTER OF THUNDERSTORMS IN CENTRAL ILLINOIS...FORMING A LONG LINE OF THUNDERSTORMS. THE STORMS HAVE BEEN PRODUCING HEAVY RAIN AND WIND GUSTS TO AROUND 50 MPH AS WELL AS FREQUENT INTENSE LIGHTNING. NO DAMAGE HAS BEEN REPORTED WITH THESE STORMS. THE STORMS WILL CONTINUE TO MOVE TO THE EAST AND WILL gBE OUT OF THE ST LOUIS METROPOLITAN AREA BY AROUND 10 PM. SOME MORE THUNDERSTORMS ARE EXPECTED IN THE AREA AGAIN LATER TONIGHT. < TUCKER
Nearby
Severe Thunderstorm Warnings in Missouri, 1987Severe 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.