Alert archive / Missouri / Flash Flood Warnings in 1990

Flash Flood Warning 18, NWS St. Louis, MO

June 7, 1990Saint Louis County, City of Saint Louis, Missouri; Saint Clair County, Illinois

NWS St. Louis, MO issued this flash flood warning at Jun 7, 1990, 3:21 AM CDT for Saint Louis County, City of Saint Louis, Missouri; Saint Clair County, Illinois. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Jun 7, 1990, 3:21 AM CDT (08:21 UTC)
Expired
Jun 7, 1990, 8:30 AM CDT
In force
5 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Saint Clair County, IL, City of Saint Louis, MO, Saint Louis County, MO

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

Paducah/Barkley, KY (KPAH), launched 00:00Z, 8.4 hours before the alert went out and 213 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, Paducah/Barkley, KY at 00:00Z on 1990-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1297 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Paducah/Barkley, KY at 00:00Z on 1990-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 263 square meters per square second.193958Sfc1 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
1297 J/kg
Mixed-layer CIN
-256 J/kg
Mixed-layer LCL
1044 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
263 m²/s²
0-3 km storm-relative helicity
413 m²/s²
Significant tornado parameter
0.0
Supercell composite
10.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 070824
FFWSTL
ILC163-MOC183-189-510-219-071330-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
321 AM CDT THU JUN 7 1990
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  830 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTHWEST ILLINOIS
          ...ST CLAIR
IN EAST CENTRAL MISSOURI
          ...ST CHARLES...ST LOUIS...ST LOUIS CITY...WARREN
 
A NARROW LINE OF VERY INTENSE THUNDERSTORMS TRAILS WEST FROM THE ST
LOUIS METROPOLITAN AREA ACROSS THE ENTIRE STATE OF MISSOURI...JUST
NORTH OF COLUMBIA TO NEAR KANSAS CITY.
 
INDIVIDUAL STORMS WITHIN THIS LINE ARE MOVING NEARLY ALONG THE LINE
WHILE THE ACTUAL LINE REMAINS NEARLY STATIONARY.
 
AREAS WHERE THUNDERSTORMS ARE FOLLOWING ONE ANOTHER WILL BE VULNERABLE
TO FLASH FLOODING THROUGH THE REMAINDER OF THE NIGHT AND INTO THE
EARLY MORNING HOURS.  THESE AREAS INCLUDE THE ST LOUIS
METROPOLITAN AREA...LAKE ST LOUIS AND WENTZVILLE...AND WARRENTON IN
MISSOURI AND BELLEVILLE ILLINOIS.
 
RUSH HOUR TRAFFIC THIS MORNING CAN EXPECT THE PROBABILITY OF FLOODING
ESPECIALLY IN LOW AREAS AND SECONDARY ROADWAYS.  THIS IS AN ESPECIALLY
DANGEROUS SITUATION.  BE EXTREMELY CAREFUL.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS AND FLASH FLOODS.  IF FLASH FLOODING IS
OBSERVED...ACT QUICKLY.  MOVE UP TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WiHEN WATER BEGINS RISING.
 
MOST DEATHS IN FLASH FLOODING 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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 1:41 AM CDTFlash Flood WarningLSXLincoln5 hr
Jun 7, 3:21 AM CDTFlash Flood WarningLSXSaint Charles, Warren5 hr
Jun 7, 8:40 AM CDTFlash Flood WarningLSXFranklin, Lincoln, Saint Charles, Warren9 hr
Jun 7, 8:40 AM CDTFlash Flood WarningLSXJefferson, Saint Louis9 hr
Jun 7, 8:40 AM CDTFlash Flood WarningLSXCity of Saint Louis9 hr
Jun 7, 2:19 PM CDTSevere Thunderstorm WarningLSXAdair, Knox, Schuyler, Scotland41 min
Jun 7, 2:54 PM CDTSevere Thunderstorm WarningLSXCrawford, Phelps66 min
Jun 7, 3:16 PM CDTSevere Thunderstorm WarningLSXFranklin, Warren59 min
Jun 7, 3:31 PM CDTTornado WarningLSXCrawford, Franklin44 min
Jun 7, 3:40 PM CDTSevere Thunderstorm WarningLSXJefferson, Saint Charles, Saint Louis, City of Saint Louis65 min
Jun 7, 3:40 PM CDTSevere Thunderstorm WarningLSXLincoln65 min
Jun 7, 3:40 PM CDTSevere Thunderstorm WarningLSXWashington65 min
Jun 7, 4:11 PM CDTTornado WarningLSXSaint Louis, City of Saint Louis49 min
Jun 7, 1:20 AM CDTSevere Thunderstorm WarningLSXEffingham, Fayette40 min
Jun 7, 6:26 AM CDTSevere Thunderstorm WarningLSXSaint Clair, Washington64 min
Jun 7, 6:43 AM CDTSevere Thunderstorm WarningLSXPerry, Randolph47 min
Jun 7, 4:19 PM CDTSevere Thunderstorm WarningLSXMadison56 min
Jun 7, 4:19 PM CDTSevere Thunderstorm WarningLSXMonroe, Saint Clair41 min
Jun 7, 4:19 PM CDTSevere Thunderstorm WarningLSXJersey41 min
Jun 7, 4:54 PM CDTSevere Thunderstorm WarningLSXBond36 min

Nearby

Flash Flood Warnings in Missouri, 1990Flash Flood Warnings in Illinois, 1990Every flash flood warning in 1990

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.