Alert archive / Missouri / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 43, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 6, 1987, 5:20 PM CDT for Saint Charles County, Saint Louis County, Warren County, Missouri. It was in force for 40 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
- Jul 6, 1987, 5:20 PM CDT (22:20 UTC)
- Expired
- Jul 6, 1987, 6:00 PM CDT
- In force
- 40 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Saint Charles County, MO, Saint Louis County, MO, Warren 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 6, 5:25 PM CDT | Hail 1.75 | Warren, 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, 10.3 hours before the alert went out and 162 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
- 2811 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 724 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 151 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 1.7
- Supercell composite
- 8.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 062221 SVRSTL MOC219-183-189-510-062300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 520 PM CDT MON JUL 6 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 600 PM CDT FOR THE FOLLOWING COUNTIES OF EAST CENTRAL MISSOURI... WARREN... ST. CHARLES... SOUTHERN ST. LOUIS... SOUTHERN ST. LOUIS CITY AT 520 PM A SEVERE THUNDERSTORM WAS LOCATED NEAR WARRENTON .. 35 MILES .. TO THE WEST OF ST LOUIS. THIS STORM WAS PRODUCING GOLF BALL SIZE HAIL. IT WAS MOVING EAST AND WILL MOVE ACROSS THE REST OF WARREN AND INTO ST CHARLES COUNTY. ANOTHER SEVERE THUNDERSTORM WAS PRODUCING 1 TO 2 INCH HAIL IN AFTON .. IN SOUTH ST LOUIS COUNTY. IT WAS ALSO MOVING EAST AT 30 MILES AN HOUR. PROTECT YOURSELF FROM DAMAGING WINDS...LARGE HAIL AND LIGHTNING BY STAYING IN A BUILDING...AWAY FROM WINDOWS. DO NOT USE THE TELEPHONE OR ELECTRICAL APPLIANCES...EXCEPT IN EMERGENCIES. 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 6, 12:37 PM CDT, 4 hours 43 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ST LOUIS MO 1235 PM CDT MON JUL 6 1987 ...SEVERE THUNDERSTORM WATCH FOR PARTS OF SOUTHERN ILLINOIS TIL 5 PM... AT 1230 PM VERY STRONG THUNDERSTORMS WERE SCATTERED 25 TO 75 MILES NORTH AND EAST OF ST. LOUIS. A SEVERE THUNDERSTORM WAS 35 MILES EAST SOUTHEAST OF ST. LOUIS...BETWEEN BREESE AND OKAWVILLE ILLINOIS. THIS STORM PRODUCED LARGE HAIL JUST EAST OF BELLEVILLE ILLINOIS AROUND NOON. OTHER VERY STRONG STORMS WERE BETWEEN WATERLOO AND NEW ATHENS ILLINOIS ABOUT 25 MILES SOUTHEAST OF ST. LOUIS...AND NEAR THE MISSISSIPPI RIVER SOUTH OF ELSBERRY MISSOURI...ABOUT 40 MILES NORTHWEST OF ST. LOUIS. THE STORMS WERE MOVING EAST AT 25 MPH. MCCARTHY
Special weather statement, Jul 6, 2:05 PM CDT, 3 hours 15 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA MO 200 PM CDT MON JUL 6 1987 ...STRONG THUNDERSTORMS OVER AUDRAIN AND CALLAWAY COUNTIES... AT 155 PM CDT STRONG THUNDERSTORMS WERE IN AN AREA 15 MILES WIDE FROM MEXICO IN AUDRAIN COUNTY OR 25 MILES NORTHEAST OF COLUMBIA TO EAST OF KINGDOM CITY OR 25 MILES EAST OF COLUMBIA. THESE STORMS COULD PRODUCE VERY HEAVY RAIN AND POSSIBLE HAIL AND DANGEROUS LIGHTNING. THE STORMS WERE MOV.ING EAST AT 25 MILES AN HOUR. WATCH FOR THREATENING WEATHER AND BE PREPARED TO MOVE TO SAFETY IF YOU ARE IN THE AREA THREATENED BY THESE STORMS. MET
Special weather statement, Jul 6, 2:54 PM CDT, 2 hours 26 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 250 PM CDT MON JUL 6 1987 ...STORMS MOVING THROUGH PIKE COUNTY MISSOURI INTO PIKE COUNTY ILLINOIS. AT 245 PM THUNDERSTORMS PELLTED BOYWLING GREEN MISSOURI WITH SMALL HAIL. BOWLING GREEN IS ABOUT 60 MILES NORTHWEST OF ST LOUIS. THESE STORMS WERE MOVING EAST AT 25 MPH AND WILL PASS THROUGH LOUISIANA MISSOURI AND PITTSFIELD ILLINOIS BETWEEN 250 PM AND 4 PM. HAMILTON
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 8:09 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles | 36 min |
| 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 | City of Saint Louis | 40 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.