Alert archive / Illinois / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 46, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 6, 1987, 5:52 PM CDT for Effingham County, Illinois. It was in force for 53 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, 5:52 PM CDT (22:52 UTC)
- Expired
- Jul 6, 1987, 6:45 PM CDT
- In force
- 53 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Effingham County, IL
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, 6:10 PM CDT | Thunderstorm Wind 52 | Effingham, 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 12:00Z, 10.9 hours before the alert went out and 53 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 062253 SVRSTL ILC049-062345- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 552 PM CDT MON JUL 6 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 645 PM CDT FOR THE FOLLOWING COUNTY OF SOUTH CENTRAL ILLINOIS... EFFINGHAM A SEVERE THUNDERSTORM WAS LOCATED IN FAYETTE COUNTY MOVING EAST INTO EFFINGHAM COUNTY AT 550PM. THIS SEVERE STORM PRODUCED WINDS IN EXCESS OF 55 MILES AN HOUR AT VANDALIA IN FAYETTE COUNTY. 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, 5 hours 15 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 47 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 58 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
Special weather statement, Jul 6, 5:40 PM CDT, 12 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA MO 535 PM CDT MON JUL 6 1987 ...THUNDERSTORM NEAR COLUMBIA... AT 530 PM CDT RADAR SHOWED THAT A THUNDERSTORM HAD DEVELOPED IN THE SOUTHERN PORTION OF COLUMBIA. PEA TO MARBLE SIZED HAIL WAS REPORTED WITH THIS THUNDERSTORM AND IT WAS MOVING NORTHEAST AT ABOUT 20 MILES AN HOUR. THIS WAS THE ONLY THUNDERSTORM IN CENTRAL MISSOURI AT 530 PM CDT... BUT OTHER STRONG THUNDERSTORMS CONTINUED IN EASTERN AND NORTHERN MISSOURI. SCATTERED STRONG THUNDERSTORMS ARE STILL EXPECTED OVER EASTERN PORTIONS OF CENTRAL MISSOURI EARLY THIS EVENING. STAY TUNED TO YOUR RADIO OR TELEVISION FOR FURTHER UPDATES. VOTAW
Special weather statement, Jul 6, 5:41 PM CDT, 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA MO 535 PM CDT MON JUL 6 1987 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR EASTCENTRAL MISSOURI UNTIL 900 PM CDT... ...THUNDERSTORM NEAR COLUMBIA... AT 530 PM CDT RADAR SHOWED THAT A THUNDERSTORM HAD DEVELOPED IN THE SOUTHERN PORTION OF COLUMBIA. PEA TO MARBLE SIZED HAIL WAS REPORTED WITH THIS THUNDERSTORM AND IT WAS MOVING NORTHEAST AT ABOUT 20 MILES AN HOUR. THIS WAS THE ONLY THUNDERSTORM IN CENTRAL MISSOURI AT 530 PM CDT... BUT OTHER STRONG THUNDERSTORMS CONTINUED IN EASTERN AND NORTHERN MISSOURI. SCATTERED STRONG THUNDERSTORMS ARE STILL EXPECTED OVER EASTERN PORTIONS OF CENTRAL MISSOURI EARLY THIS EVENING. STAY TUNED TO YOUR RADIO AND TELEVISION FOR UPDATES. VOTAW
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 | Calhoun, Jersey | 36 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, 3:10 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Pike | 50 min |
| Jul 6, 3:24 PM CDT | Severe Thunderstorm Warning | LSX | Greene | 39 min |
| Jul 6, 4:24 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Jersey, Madison | 51 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 |
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.