Alert archive / Illinois / Flash Flood Warnings in 1986
Flash Flood Warning 10, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Sep 18, 1986, 9:45 AM CDT for Perry County, Randolph County, Illinois. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Sep 18, 1986, 9:45 AM CDT (14:45 UTC)
- Expired
- Sep 18, 1986, 1:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Perry County, IL, Randolph 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, 2.8 hours before the alert went out and 89 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
- 106 J/kg
- Mixed-layer CIN
- -114 J/kg
- Mixed-layer LCL
- 620 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- -34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 181445 FFWSTL ILC145-157-181800- BULLETIN - EBS ACTIVATION AND IMMEDIATE BROADCAST REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 945 AM CDT THU SEP 18 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 100 PM CDT FOR THE FOLLOWING COUNTIES OF SOUTHWEST ILLINOIS... PERRY... RANDOLPH HEAVY RAIN WAS INDICATED OVER THE WARNED COUNTIES AT 945 AM. NEARLY 8 INCHES OF RAIN FELL AT CHESTER ILLINOIS DURI[NG THE PAST 24 HOURS. ROADS ARE FLOODING AND SMALLER SMALLER CREEKS ARE RISING RAPIDLY. FLASH FLOODING IS IMMINENT IN THIS AREA. IF YOU LIVE ALONG THESE RIVERS AND STREAMS...YOU SHOULD GO TO SAFETY IMMEDIATELY.
What forecasters said that day
The local office's own words before this flash flood 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, Sep 18, 4:20 AM CDT, 5 hours 25 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 410 AM CDT THU SEP 18 1986 ...FLOODING APPEARS IMMINENT JUST SOUTH OF ST LOUIS... ...FLASH FLOOD WARNINGS CONTINUE FOR FOUR COUNTIES IN EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS... AT 355 AM...THUNDERSTORMS CONTINUED TO LIE IN A NARROW EAST-WEST LINE FROM 50 MILES WEST SOUTHWEST OF ST LOUIS TO 75 MILES SOUTHEAST OF ST LOUIS. FLASH FLOOD WARNINGS REMAIN IN EFFECT FOR AT LEAST PORTIONS OF FRANKLIN AND JEFFERSON COUNTIES IN MISSOURI AND MONROE AND ST. CLAIR COUNTIES IN ILLINOIS. HEAVY RAINS HAVE CONTINUED FOR UP TO SEVEN HOURS IN PORTIONS OF THESE COUNTIES AND WILL LIKELY CONTINUE UNTIL AT LEAST SUNRISE. < FLOODING WILL BECOME QUITE PRONOUNCED IN THESE AREAS..ESPECIALLY IN SECONDARY ROADS AND SMALLER CREEKS AND TRIBUTARIES. THIS IS A VERY DANGEROUS SITUATION. MANY PERSONS WILL BE DRIVING INTO THE ST LOUIS METROPOLITAN AREA DURING DARKNESS OR SEMI-DAYLIGHT. DO NOT...DO NOT DRIVE THROUGH FLOWING WATER..YOU COULD BE STRANDED OR TRAPPED. THE DEPTH OF WATER IS NOT ALWAYS OBVIOUS. BE VERY CAREFUL TO RECOGNIZE FLOOD DANGERS THIS MORNING. STAY TUNED TO YOUR NOAA WEATHER RADIO..COMMERCIAL RADIO..OR TELEVISION STATION FOR LATEST INFORMATION. PEDIGO
Special weather statement, Sep 18, 5:16 AM CDT, 4 hours 29 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 505 AM CDT THU SEP 18 1986 ...FLOODING APPEARS IMMINENT JUST SOUTH OF ST LOUIS... ...FLASH FLOOD WARNINGS CONTINUE FOR FOUR COUNTIES IN EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS... AT 500 AM...HEAVY THUNDERSTORMS REDEVELOPED OVER FRANKLIN AND JEFFERSON COUNTIES IN EAST CENTRAL MISSOURI...JUST SOUTH OF THE ST LOUIS METRO- POLITAN AREA. RAINFALL..HEAVY AT TIMES..HAS BEEN FALLING MOST OF THE NIGHT THERE. NO OFFICIAL RAINFALL AMOUNTS HAVE BEEN REPORTED AT THIS TIME..HOWEVER AMOUNTS IN EXCESS OF FIVE INCHES ARE LIKELY. FLASH FLOOD WARNINGS REMAIN IN EFFECT FOR AT LEAST PORTIONS OF FRANKLIN AND JEFFERSON COUNTIES IN MISSOURI AND MONROE AND ST. CLAIR COUNTIES IN ILLINOIS UNTIL ABOUT SUNRISE THIS MORNING. THUNDERSTORMS HAVE BEGUN TO CROSS EASTWARD THROUGH THE ST LOUIS METROPOLITAN AREA FURTHER NORTH AND IT APPEARS THAT SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH MUCH OF THE RUSH HOUR THIS MORNING. FLOODING WILL BECOME QUITE PRONOUNCED TO THE SOUTH OF ST LOUIS... ESPECIALLY IN SECONDARY ROADS AND SMALLER CREEKS AND TRIBUTARIES. THIS IS A VERY DANGEROUS SITUATION. PERSONS DRIVING INTO ST LOUIS FROM THE SOUTH SHOULD BE PREPARED FOR POSSIBLE FLOODING. DO NOT...DO NOT DRIVE THROUGH FLOWING WATER..YOU COULD BE STRANDED OR TRAPPED. THE DEPTH OF WATER IS NOT ALWAYS OBVIOUS. BE VERY CAREFUL TO RECOGNIZE FLOOD DANGERS THIS MORNDING. STAY TUNED TO YOUR NOAA WEATHER RADIO..COMMERCIAL RADIO..OR TELEVISION STATION FOR LATEST INFORMATION. PEDIGO
Special weather statement, Sep 18, 5:51 AM CDT, 3 hours 54 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 545 AM CDT THU SEP 18 1986 ... FLASH FLOOD WATCH CONTINUES FOR ENTIRE ST. LOUIS AREA ... THE FLASH FLOOD WARNINGS FOR 4 COUNTIES JUST SOUTH OF ST LOUIS WILL EXPIRE SHORTLY AFTER 6AM. AT 545 AM...RAIN WAS INDICATED OVER MOST OF THE ST LOUIS AREA WITH HEAVY RAIN IN NUMEROUS SPOTS. HEAVIER RAIN WAS INDICATED ALONG THE MISSOURI RIVER NEAR MARTHASVILLE AND WASHINGTON AND EXTENDED INTO WEST ST LOUIS COUNTY AND JEFFERSON COUNTY. THE HEAVIER DOWNPOURS WILL TEND TO FLOOD LOW SPOTS IN ROADS..AND RUSH HOUR MOTORISTS SHOULD KEEP ALERT FOR THESE FLOODED AREAS. IN ADDITION..SMALLER CREEKS AND STREAMS WILL BeE RISING AND COULD OVERFLOW THEIR BANKS. . SHOWERS AND OCCASIONAL HEAVY DOWNPOURS WIL CONTINUE IN THE ST. LOUIS AREA THROUGH THE MORNING RUSH HOUR. FELDT
Special weather statement, Sep 18, 8:46 AM CDT, 59 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ST LOUIS MO. 836 AM CDT THU SEP 18 1986 ..A FLASH FLOOD WATCH IS IN EFFECT THIS MORNING FROM WEST CENTRAL TO EAST CENTRAL MISSOURI..KANSAS CITY TO ST LOUIS.. ..STRONG STORMS PRODUCING VERY HEAVY RAINS CONTINUE FROM CENTRAL TO EAST CENTRAL MISSOURI TO SOUTHWEST ILLINOIS.. AT 832 AM CDT...SCATTERED THUNDERSTORMS WITH VERY HEAVY RAINS CONTINUED IN PARTS OF CENTRAL TO EAST CENTRAL MISSOURI TO SOUTHWEST ILLINOIS. SCATTERED THUNDERSHOWERS CONTINUED IN A LARGE PART OF WEST CENTRAL TO EAST CENTRAL MISSOURI TO SOUTHEAST ILLINOIS. THIS 175 MILE WIDE AREA OF STORMS EXTENDED FROM WEST OF SEDALIA THROUGH THE ST LOUIS MISSOURI AREA TO EAST OF PADUCAH KENTUCKY. THE STRONGER STORMS WITH VERY HEAVY RAINS WERE IN A 40 MILE WIDE AREA FROM NEAR THE VICHY/RALLO AREA IN MISSOURI TO JUST WEST OF MARION ILLINOIS. THESE STORMS WERE MOVING TO THE SOUTHEAST AT 25 MILES A N HOUR. TRAVELERS SHOULD TAKE EXTRA CAUTION THIS MORNING AROUND LOW LYING AREAS AND LOW BRIDGES..AND ANY PLACE WATER MAY COLLECT. BB
Special weather statement, Sep 18, 9:41 AM CDT, 4 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ST LOUIS MO. 930 AM CDT THU SEP 18 1986 ..A FLASH FLOOD WATCH IS IN EFFECT THIS MORNING FROM WEST CENTRAL TO EAST CENTRAL MISSOURI..KANSAS CITY TO ST LOUIS.. ..STRONG STORMS PRODUCING VERY HEAVY RAINS CONTINUE IN EAST CENTRAL ..AND SOUTHEAST MISSOURI.. AT 928 AM CDT...AN ISOLATED THUNDERSTORM WITH VERY HEAVY RAIN WAS OCCURRING JUST NORTH OF ST LOUIS IN EAST CENTRAL MISSOURI. SCATTERED THUNDERSTORMS WITH VERY HEAVY RAINS CONTINUED IN PARTS OF CENTRAL TO SOUTHEAST MISSOURI. SCATTERED THUNDERSTORMS..SOME WITH HEAVY RAINS.. CONTINUED IN A LARGE PART OF CENTRAL TO EAST CENTRAL MISSOURI TO SOUTHEAST ILLINOIS. THIS 160 MILE WIDE AREA OF STORMS EXTENDED FROM 50 MILES WEST OF JEFFERSON CITY THROUGH EAST CENTRAL MISSOURI TO NORTHEAST OF PADUCAH KENTUCKY. THE STRONGER STORMS WERE 10 MILES NORTH OF ST LOUIS MISSOURI..AND IN A 30 MILE WIDE AREA FROM THE VTICHY/RALLO AREA TO 20 MILES NORTHWEST OF CAPE GIRARDEAU MISSOURI. TRAVELERS SHOULD TAKE EXTRA THE TODAY AND WATCH FOR WATER COLLECTING IN LOW AREAS. BB
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 18, 3:23 AM CDT | Flash Flood Warning | LSX | Monroe, Saint Clair | 3 hr |
| Sep 18, 7:04 AM CDT | Flash Flood Warning | LSX | Monroe | 3 hr |
Nearby
Flash Flood Warnings in Illinois, 1986Every flash flood 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.