Alert archive / Illinois / Flash Flood Warnings in 1993
Flash Flood Warning 72, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Sep 23, 1993, 7:54 AM CDT for Madison County, Illinois. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Sep 23, 1993, 7:54 AM CDT (12:54 UTC)
- Expired
- Sep 23, 1993, 11:00 AM CDT
- In force
- 3 hr
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Madison County, IL
The radar
The St Louis radar (KLSX), 69 km from the middle of the area, began a volume at 12:53 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Springfield, MO (KUMN), launched 12:00Z, 0.9 hours before the alert went out and 404 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
- 1898 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 756 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 137 m²/s²
- 0-3 km storm-relative helicity
- 144 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 231256 FFWSTL ILC119-133-163-231600- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 754 AM CDT THU SEP 23 1993 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 1100 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHWEST ILLINOIS ...MADISON COUNTY...MONROE COUNTY...ST CLAIR COUNTY AT 750 CDT...NWS DOPPLER RADAR IDICATED A LINE OF STRONG THUNDERSTORMS PRODUCING VERY HEAVY RAIN MOVING THROUGH ST. LOUIS...ST. CHARLES...AND FRANKLIN COUNTIES. THE LINE WAS MOVING EAST AT 30 MILES AN HOUR. AT LEAST ONE TO TWO INCHES OF RAIN WILL FALL WITH THIS LINE OF STORMS. THIS WILL PRODUCE FLASH FLOODING! A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND. JPK
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 23, 6:30 AM CDT, 1 hour 24 minutes before
MOZ009-010-011-014-231230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA MO 630 AM CDT THU SEP 23 1993 ...A FLASH FLOOD WATCH IS IN EFFECT THROUGH THE MORNING... AT 625 AM CDT WEATHER RADAR SHOWED THUNDERSTORMS WITH VERY HEAVY SHOWERS MOVING THROUGH CENTRAL MISSOURI...IN COLUMBIA AND WITHIN A 20 MILE RADIUS OF THE CITY. THESE STORMS PRODUCED .25 OF AN INCH OF RAIN IN 15 MINUTES AT THE REGIONAL AIRPORT JUST SOUTH OF COLUMBIA. THE GENERAL AREA OF MOSTLY LIGHT TO MODERATE SHOWERS COVERED THE NORTH HALF OF MISSOURI AND EXTENDED INTO SOUTHEAST MISSOURI BETWEEN FORT LEONARD WOOD..CAPE GIRARDEAU AND ST. LOUIS. THE THUNDERSTORMS WERE MOVING TO THE SOUTHEAST AROUND 30 MILES AN HOUR. LB
Special weather statement, Sep 23, 6:32 AM CDT, 1 hour 22 minutes before
MOZ009-010-011-014-231230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA MO 630 AM CDT THU SEP 23 1993 ...A FLASH FLOOD WATCH IS IN EFFECT THROUGH THE MORNING... AT 625 AM CDT WEATHER RADAR SHOWED THUNDERSTORMS WITH VERY HEAVY SHOWERS MOVING THROUGH CENTRAL MISSOURI...IN COLUMBIA AND WITHIN A 20 MILE RADIUS OF THE CITY. THESE STORMS PRODUCED .25 OF AN INCH OF RAIN IN 15 MINUTES AT THE REGIONAL AIRPORT JUST SOUTH OF COLUMBIA. THE GENERAL AREA OF MOSTLY LIGHT TO MODERATE SHOWERS COVERED THE NORTH HALF OF MISSOURI AND EXTENDED INTO SOUTHEAST MISSOURI BETWEEN FORT LEONARD WOOD..CAPE GIRARDEAU AND ST. LOUIS. THE THUNDERSTORMS WERE MOVING TO THE SOUTHEAST AROUND 30 MILES AN HOUR. LB
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 23, 7:54 AM CDT | Flash Flood Warning | LSX | Monroe, Saint Clair | 3 hr |
| Sep 23, 9:20 AM CDT | Flash Flood Warning | LSX | Perry, Randolph, Washington | 3 hr |
Nearby
Flash Flood Warnings in Illinois, 1993Every flash flood warning in 1993
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; radar from the NEXRAD Level II archive.