Alert archive / Illinois / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 32, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 11, 1986, 5:07 PM CDT for Jefferson County, Illinois. It was in force for 53 min.
The area
The counties it named.
The facts
- Issued
- Jul 11, 1986, 5:07 PM CDT (22:07 UTC)
- Expired
- Jul 11, 1986, 6:00 PM CDT
- In force
- 53 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Jefferson County, IL
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 12:00Z, 10.1 hours before the alert went out and 39 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
- 1572 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 682 m above ground
- 0-6 km bulk shear
- 0 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 0 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 112207 SVRSTL ILC081-112300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SAINT LOUIS MO 507 PM CDT FRI JUL 11 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 600 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTH CENTRAL ILLINOIS...JEFFERSON AT 500 PM CDT RADAR SHOWED A LINE OF SEVERE THUNDERSTORMS FROM JUST SOUTH OF SALEM ILLINOIS TO ABOUT 5 MILES NORTHWEST OF PINCKNEYVILLE..OR ABOUT 12 MILES NORTHWEST OF MOUNT VERNON. THE STORMS WERE MOVING TO THE EAST NORTHEAST AT 30 MPH. SEVERE THUNDERSTORMS WILL PRODUCE DAMAGING WINDS..LARGE HAIL AND DEADLY LIGHTNING. HEAVY RAINS WILL QUICKLY FLOOD SMALL STREAMS AND LOW LYING AREAS. 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 11, 1:52 PM CDT, 3 hours 15 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 150 PM CDT FRI JUL 11 1986 ...STRONG THUNDERSTORMS IN THE ST. LOUIS AREA... VERY STRONG THUNDERSTORMS DEVELOPED RAPIDLY IN THE ST. LOUIS AREA AT AROUND 130 THIS AFTERNOON. THE MISSOURI HIGHWAY PATROL REPORTED THAT ONE STORM NEAR CHESTERFIELD SHOPPING MALL IN WEST ST. LOUIS COUNTY..NEAR HIGHWAY 40..JUST WEST OF INTERSTATE 270 HAD PRODUCED MARBLE SIZE HAIL..GUSTY WINDS AND EXTREMELY HEAVY RAIN. AT 145 PM RADAR SHOWED SEVERAL STRONG THUNDERSTORMS BETWEEN WASHINGTON MISSOURI AND WEST SECTIONS OF ST. LOUIS. THE STRONGEST OF THESE WAS THE STORM IN WEST ST. LOUIS COUNTY NEAR CHESTERFIELD MALL. OTHER SHOWERS AND THUNDERSTORMS EXTENDED NORTHEAST FROM ST. LOUIS ABOUT 75 MILES INTO ILLINOIS..JUST NORTH OF VANDALIA. OTHERS EXTENDED SOUTHWEST FROM ST. LOUIS..ALONG THE MERAMEC RIVER TO AROUND FORT LEONARD WOOD. THE STORMS WERE MOVING TO THE EAST NORTHEAST AROUND 15 MPH. THEY COULD PRODUCE MORE LOCALLY HEAVY RAIN..GUSTY WINDS..FREQUENT LIGHTNING AND POSSIBLY SOME HAIL. MCCARTHY
Special weather statement, Jul 11, 2:38 PM CDT, 2 hours 29 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ST LOUIS MO 235 PM CDT FRI JUL 11 1986 AT 230 PM CDT..A LINE OF THUNDERSTORMS EXTENDED FROM SOUTH CENTRAL MISSOURI TO EAST CENTRAL ILLINOIS. A LINE OF SHOWERS AND THUNDERSTORMS 15 MILES WIDE EXTENDED FROM NEAR FORT LEONARD WOOD IN MISSOURI TO 25 MILES NORTHEAST OF VANDALIA ILLINOIS. HEAVY RAINFALL..STRONG GUSTY WINDS..AND HAIL MAY ACCOMAPNY SOME OF THESE STORMS AS T1HEY MOVE NORTHEAST AT 25 TO 30 MILES AN HOUR. DYE
Special weather statement, Jul 11, 3:18 PM CDT, 1 hour 49 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 317 PM CDT FRI JUL 11 1986 ...A SEVERE THUNDERSTORM WATCH REMAINS POSTED FOR MUCH OF SOUTHEAST MISSOURI AND SOUTHERN ILLINOIS UNTIL 9 PM... AT 315 PM CDT..RADAR SHOWED A BAND OF THUNDERSTORMS ABOUT 35 MILES WIDE FROM MATTOON ILLINOIS THROUGH THE SOUTH AND EAST PARTS OF THE ST. LOUIS METROPOLITAN AREA..EXTENDING FARTHER SOUTHWEST TO AROUND SALEM MISSOURI..ABOUT 90 MILES SOUTHWEST OF ST. LOUIS. SOME OF THESE STORMS WERE STRONG AND CAPABLE OF PRODUCING VERY HEAVY RAIN..GUSTY WINDS..FREQUENT LIGHTNING AND POSSIBLY HAIL. NO REPORTS OF SEVERE WEATHER HAVE BEEN RECEIVED HOWEVER AS OF 315 PM. OTHER THUNDERSTORMS WERE SCATTERKED AROUND THE LAKE OF THE OZARKS REGION AT 315 PM. ALL OF THE STORMS WERE MOVING NORTHEAST AT 25 TO 30 MPH. MCCARTHY
Local storm report, Jul 11, 4:38 PM CDT, 29 minutes before
STORM REPORT NATIONAL WEATHER SERVICE ST LOUIS MO 438 PM CDT FRI JUL 11 1986 AT APPROXIMATELY 330 PM CDT..THUNDERSTORM WINDS DOWNED SEVERAL TREES AND DAMAGED SHEDS ON THE TOWER TEE GOLF COURSE IN SOUTHWEST ST. LOUIS COUNTY NEAR HEEGE AND WATSON ROADS. EXTREMELY HEAVY RAIN AND SMALL HAIL WAS REPORTED AT THE SAME TIME IN THAT AREA. MCCARTHY
Special weather statement, Jul 11, 4:45 PM CDT, 22 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ST LOUIS MO 445 PM CDT FRI JUL 11 1986 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF SOUTHEAST MISSOURI AND PORTIONS OF CENTRAL AND SOUTHERN ILLINOIS UNTIL 9 PM THIS FRIDAY EVENING... AT 425 PM CDT..A LINE OF THUNDERSTORMS..WITH HEAVY RAINS.. WAS LOCATED OVER SOUTHERN ILLINOIS FROM SPARTA INTO WASHINGTON COUNTY AND SOUTHERN CLINTON COUNTY JUST SOUTH OF CARLYLE AND THEN TO NEAR SALEM AND CENTRALIA. THESE STORMS HAVE PRODUCED HEAVY RAINS AND DAMAGING THUNDERSTORMS WINDS. MOVEMENT OF THESE STORMS WAS TO THE EAST AT 35 MILES AN HOUR. ELSEWHERE..ISOLATED THUNDERSTORMS..SOME WITH HEAVY RAINS.. AND SCATTERED THUNDERSHOWERS AND RAINSHOWERS CONTINUED OVER PORTIONS OF CENTRAL..EAST CENTRAL..SOUTHERN..AND SOUTHEAST MISSOURI AND SOUTHWEST AND CENTRAL ILLINOIS. THE HEAVIER STORMS WERE LOCATED OVER MISSOURI NEAR VICHY..FLAT RIVER.. AND NORTHERN JEFFERESON COUNTY AND OVER ILLINOIS NEAR STEELVILLE.. MOVEMENT OF THESE STORMS AND SHOWERS WAS TO THE EAST AT 35 MILES AN HOUR. DS.
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 7:15 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Pike | 45 min |
| Jul 11, 4:45 PM CDT | Severe Thunderstorm Warning | LSX | Marion, Washington | 60 min |
| Jul 11, 4:45 PM CDT | Severe Thunderstorm Warning | LSX | Perry, Randolph | 60 min |
| Jul 11, 5:45 PM CDT | Severe Thunderstorm Warning | LSX | Perry | 60 min |
| Jul 11, 6:00 PM CDT | Severe Thunderstorm Warning | LSX | Madison | 45 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1986Every severe thunderstorm warning in 1986
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.