Alert archive / Illinois / Flash Flood Warnings in 1995

Flash Flood Warning 8, NWS St. Louis, MO

May 17, 1995Saint Charles County, Missouri; Calhoun County, Jersey County, Madison County, Illinois

NWS St. Louis, MO issued this flash flood warning at May 17, 1995, 2:22 AM CDT for Saint Charles County, Missouri; Calhoun County, Jersey County, Madison County, Illinois. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
May 17, 1995, 2:22 AM CDT (07:22 UTC)
Expired
May 17, 1995, 8:00 AM CDT
In force
6 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Calhoun County, IL, Jersey County, IL, Madison County, IL, Saint Charles County, MO

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 7.4 hours before the alert went out and 203 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.

Skew-T log-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 1995-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 132 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 1995-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
132 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
658 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSTL 170723
FFWSTL
ILC027-081-121-189-013-083-119-133-163-MOC071-099-113-183-189-219-
510-171300-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
222 AM CDT WED MAY 17 1995
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 800 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL ILLINOIS
 
   ...CLINTON COUNTY...JEFFERSON COUNTY...MARION COUNTY
   ...WASHINGTON COUNTY
 
IN SOUTHWEST ILLINOIS
 
   ...CALHOUN COUNTY...JERSEY COUNTY...MADISON COUNTY
   ...MONROE COUNTY...ST CLAIR COUNTY
 
 
IN EAST CENTRAL MISSOURI
 
   ...FRANKLIN COUNTY...JEFFERSON COUNTY...LINCOLN COUNTY
   ...ST CHARLES COUNTY...ST LOUIS COUNTY...WARREN COUNTY
 
  AND THE INDEPENDENT CITY OF
 
   ...ST LOUIS CITY
 
AT 220 AM...RADAR CONTINUED TO SHOW NUMEROUS THUNDERSTORMS EXTENDING
FROM EAST OF ST LOUIS TO NEAR COLUMBIA. THESE STORMS WERE MOVING EAST
AND TRACKING OVER THE SAME AREA BRINGING SIGNIFICANT RAINFALL
ACCUMULATIONS EARLY THIS MORNING. WITH HEAVY RAINS ON TUESDAY...THE
ADDITIONAL HEAVY RAIN WILL LEAD TO FLASH FLOODING.
 
THIS WARNING CONTINUES AND EXPANDS THE EARLIER FLASH FLOOD WARNING FOR
THE ST LOUIS METRO AREA. FLASH FLOOD WARNINGS WILL NOW BE IN EFFECT FROM
MT VERNON ILLINOIS THROUGH THE ST LOUIS METRO AREA AND WEST INTO CENTRAL
MISSOURI.
 
THIS IS A DANGEROUS SITUATION. CONDITIONS REMAIN FAVORABLE FOR MORE
THUNDERSTORMS TO FORM THROUGH AT LEAST DAYBREAK. RAINFALL ESTIMATES FROM
RADAR SHOW AS MUCH AS 6 INCHES MAY HAVE ALREADY FALLEN DURING THE PAST
24 HOURS WITH THE POTENTIAL TO PICK UP SEVERAL MORE INCHES THIS MORNING.
 
IF FLASH FLOODING IS OBSERVED OR IMMINENT...MOVE QUICKLY TO
FHIGHER GROUND. NEVER DRIVE INTO AN AREA WHERE WATER COVERS THE
ROAD...ESPECIALLY LOW-WATER BRIDGES.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODING. NEVER DRIVE OR WALK INTO FLOOD WATER.
 
SHEA/TRUETT

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 16, 7:36 PM CDTSevere Thunderstorm WarningLSXPike54 min
May 16, 7:47 PM CDTSevere Thunderstorm WarningLSXCallaway43 min
May 16, 8:11 PM CDTSevere Thunderstorm WarningLSXMontgomery49 min
May 16, 9:01 PM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis44 min
May 16, 11:11 PM CDTSevere Thunderstorm WarningLSXBoone49 min
May 17, 12:15 AM CDTFlash Flood WarningLSXBoone, Callaway, Cole, Moniteau5 hr
May 17, 12:15 AM CDTFlash Flood WarningLSXAudrain, Montgomery5 hr
May 17, 1:53 AM CDTSevere Thunderstorm WarningLSXMoniteau37 min
May 17, 2:22 AM CDTFlash Flood WarningLSXSaint Louis, City of Saint Louis6 hr
May 17, 2:22 AM CDTFlash Flood WarningLSXJefferson6 hr
May 17, 2:22 AM CDTFlash Flood WarningLSXFranklin, Lincoln, Warren6 hr
May 17, 4:20 AM CDTSevere Thunderstorm WarningLSXWashington40 min
May 17, 4:40 AM CDTSevere Thunderstorm WarningLSXSainte Genevieve, Saint Francois50 min
May 16, 9:21 PM CDTSevere Thunderstorm WarningLSXMadison, Saint Clair54 min
May 16, 9:40 PM CDTTornado WarningLSXSaint Clair50 min
May 16, 9:53 PM CDTSevere Thunderstorm WarningLSXClinton52 min
May 16, 10:22 PM CDTSevere Thunderstorm WarningLSXMarion53 min
May 17, 2:22 AM CDTFlash Flood WarningLSXClinton, Saint Clair6 hr
May 17, 2:22 AM CDTFlash Flood WarningLSXJefferson, Marion, Washington6 hr

Nearby

Flash Flood Warnings in Illinois, 1995Flash Flood Warnings in Missouri, 1995Every flash flood warning in 1995

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.