Alert archive / Missouri / Flash Flood Warnings in 1996

Flash Flood Warning 4, NWS St. Louis, MO

April 21, 1996Franklin County, Gasconade County, Missouri

NWS St. Louis, MO issued this flash flood warning at Apr 21, 1996, 10:59 PM CDT for Franklin County, Gasconade County, Missouri. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 21, 1996, 10:59 PM CDT (03:59 UTC)
Expired
Apr 22, 1996, 5:00 AM CDT
In force
6 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Franklin County, MO, Gasconade County, MO

The radar

The St Louis radar (KLSX), 61 km from the middle of the area, began a volume at 03:58 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 (KSGF), launched 00:00Z, 4.0 hours before the alert went out and 278 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, Springfield, MO at 00:00Z on 1996-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1598 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 1996-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 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
1598 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
594 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
30 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 220431 COR
FFWSTL
MOC073-071-221000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING...RETRANSMISSION FOR SEMA...
NATIONAL WEATHER SERVICE ST LOUIS MO
1059 PM CDT SUN APR 21 1996

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  500 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN CENTRAL MISSOURI

   ...GASCONADE COUNTY

IN EAST CENTRAL MISSOURI

   ...FRANKLIN COUNTY

HEAVY RAINS HAVE BEEN FALLING ACROSS SECTIONS OF FRANKLIN AND GASCONADE
COUNTIES DURING THE EVENING. FLOODING WAS REPORTED IN THE WASHINGTON
AREA AT 1055 PM...AND EVACUATIONS ARE NOW TAKING PLACE.

RADAR INDICATES ANYWHERE FROM 2 TO 5 INCHES OF RAIN HAS FALLEN SO
FAR...AND MORE RAIN IS ON THE WAY OVER THE NEXT FEW HOURS.   THE
RAINFALL OBSERVER AT OWENSVILLE REPORTED 3.4 INCHES OF RAIN SO FAR THIS
EVENING.

PEOPLE IN FRANKLIN AND GASCONADE COUNTIES...AND ESPECIALLY THOSE LIVING
ING THE OWENSVILLE...GERALD...AND WASHINGTON AREAS...SHOULD BE VERY
CAREFUL OVERNIGHT...AND REMAIN ALERT FOR RAPIDLY RISING WATER.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODING. NEVER DRIVE OR WALK INTO FLOOD WATER.

FLASH FLOODING IS THE LEADINGN WEATHER RELATED KILLER ACROSS THE
UNITED STATES. NEVER UNDERESTIMATE THE POWER OF FLOWING WATER.
MOVE TO HIGHER GROUND IMMEDIATELY WHEN FLOODING THREATENS. YOUR
LIFE MAY DEPEND ON IT.

TRUETT/VA
&

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 21, 7:49 PM CDTSevere Thunderstorm WarningLSXKnox, Shelby41 min
Apr 21, 8:38 PM CDTSevere Thunderstorm WarningLSXGasconade, Osage52 min
Apr 21, 10:20 PM CDTSevere Thunderstorm WarningLSXFranklin, Saint Charles, Saint Louis40 min
Apr 22, 12:21 AM CDTSevere Thunderstorm WarningLSXCrawford, Washington39 min
Apr 22, 5:21 AM CDTFlash Flood WarningLSXIron, Madison, Sainte Genevieve, Saint Francois5 hr
Apr 22, 5:21 AM CDTFlash Flood WarningLSXReynolds5 hr

Nearby

Flash Flood Warnings in Missouri, 1996Every flash flood warning in 1996

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.