Alert archive / Missouri / Flash Flood Warnings in 1996

Flash Flood Warning 5, NWS St. Louis, MO

April 22, 19964 counties in Missouri

NWS St. Louis, MO issued this flash flood warning at Apr 22, 1996, 5:21 AM CDT for 4 counties in Missouri. It was in force for 5 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 22, 1996, 5:21 AM CDT (10:21 UTC)
Expired
Apr 22, 1996, 10:19 AM CDT
In force
5 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Iron County, MO, Madison County, MO, Saint Francois County, MO, Sainte Genevieve County, MO

The radar

The St Louis radar (KLSX), 116 km from the middle of the area, began a volume at 10:24 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, 10.4 hours before the alert went out and 311 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 221028
FFWSTL
MOC187-186-093-123-179-221530-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
521 AM CDT MON APR 22 1996
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1030 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL MISSOURI
 
   ...SOUTHERN ST. FRANCOIS COUNTY...ST. GENEVIEVE COUNTY
 
IN SOUTHEAST MISSOURI
 
   ...IRON COUNTY...MADISON COUNTY...REYNOLDS COUNTY
 
AT 520 AM...WEATHER SERVICE DOPPLER RADAR WAS ESTIMATING 2.5 TO 4.0
INCHES OF RAIN HAD FALLEN SINCE MIDNIGHT IN A FAIRLY LARGE WEST-EAST
SWATH FROM THE BIXBY AND OATES AREA TO NEAR FREDERICKTOWN.
 
RADAR CONTINUED TO SHOW A LARGE AREA OF SHOWERS AMD THUNDERSTORMS OVER
THIS AREA...WHICH SHOULD CONTINUE THROUGH THE MORNING HOURS.  THE IRON
COUNTY EOC REPORTED THAT PORTIONS OF HIGHWAYS 72 AND 21 AS WELL AS
NUMEROUS COUNTY ROADS WERE IMPASSABLE DUE TO HIGH WATER.  AN ADDITIONAL
ONE TO TWO INCHES OF RAINFALL IS POSSIBLE THIS MORNING WHICH WILL
AGRREVATE EXISTING CONDITIONS AND LIKELY RESULT IN ADDITIONAL FLOODING.
 
BE ESPECIALLY CAUTIOUS IF CAMPING NEAR A STREAM. RAIN UPSTREAM
MAY CAUSE FLASH FLOODING AT YOUR LOCATION WITH LITTLE OR NO
WARNING.
 
FLASH FLOODING IS THE LEADING 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.
: 
GLASS
 
&

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 21, 10:59 PM CDTFlash Flood WarningLSXFranklin, Gasconade6 hr
Apr 22, 12:21 AM CDTSevere Thunderstorm WarningLSXCrawford, Washington39 min
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.