Alert archive / Missouri / Flash Flood Warnings in 1997

Flash Flood Warning 11, NWS St. Louis, MO

June 22, 19974 counties in Missouri

NWS St. Louis, MO issued this flash flood warning at Jun 22, 1997, 4:50 AM CDT for 4 counties in Missouri. It was in force for 4 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
Jun 22, 1997, 4:50 AM CDT (09:50 UTC)
Expired
Jun 22, 1997, 9:00 AM CDT
In force
4 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Audrain County, MO, Callaway County, MO, Monroe County, MO, Montgomery County, MO

The radar

The St Louis radar (KLSX), 108 km from the middle of the area, began a volume at 09:53 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

Lincoln, IL (KILX), launched 00:00Z, 9.8 hours before the alert went out and 298 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 1997-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 301 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 1997-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 square meters per square second.1939Sfc1 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
301 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
1421 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
-81 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 220949
FFWSTL
MOC027-073-139-007-055-137-221400-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
450 AM CDT SUN JUN 22 1997
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  900 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL MISSOURI
 
   ...CALLAWAY COUNTY...GASCONADE COUNTY...MONTGOMERY COUNTY
 
IN EAST CENTRAL MISSOURI
 
   ...AUDRAIN COUNTY...CRAWFORD COUNTY
 
IN NORTHEAST MISSOURI
 
   ...MONROE COUNTY
 
NWS DOPPLER RADAR CONTINUED TO SHOW A BAND OF STRONG THUNDERSTORMS FROM
NEAR PARIS IN MONROE COUNTY TO FULTON IN CALLAWAY COUNTY TO STEELVILLE
IN CRAWFORD COUNTY EARLY THIS MORNING. RADAR CONTINUED TO ESTIMATE ONE
TO THREE INCHES...WITH SOME ISOLATED FOUR INCH AMOUNTS...IN A ONE HOUR
PERIOD WITH THESE STORMS. WITH THE HEAVY RAIN THAT FELL IN CENTRAL
MISSOURI DURING THE OVERNIGHT HOURS...A NEARLY SATURATED GROUND...AND
THE SLOW SOTUH-SOUTHEAST MOVEMENT OF 5-10 MPH...THE THREAT OF FLASH
FLOODING IS IMMINENT IN THESE AREAS!!
 
IF FLASH FLOODING IS OBSERVED OR IMMINENT...MOVE QUICKLY TO
HIGHER GROUND. NEVER DRIVE INTO AN AREA WHERE WATER COVERS THE
ROAD...ESPECIALLY LOW-WATER BRIDGES.
 
IF YOU LIVE NEAR A SMALL STREAM OR OTHER LOW LYING FLOOD-
PRONE AREA...BE PREPARED TO MOVE TO HIGHER GROUND QUICKLY.
YOUR LIFE MAY DEPEND ON IT.
 
METZE

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 7:39 PM CDTSevere Thunderstorm WarningLSXWashington51 min
Jun 21, 8:31 PM CDTSevere Thunderstorm WarningLSXWashington44 min
Jun 21, 10:22 PM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade68 min
Jun 21, 11:45 PM CDTFlash Flood WarningLSXCrawford, Franklin, Jefferson, Washington5 hr
Jun 22, 12:48 AM CDTFlash Flood WarningLSXWarren4 hr
Jun 22, 1:15 AM CDTFlash Flood WarningLSXMontgomery4 hr
Jun 22, 2:49 AM CDTFlash Flood WarningLSXCallaway3 hr
Jun 22, 3:44 AM CDTFlash Flood WarningLSXAudrain3 hr
Jun 22, 4:50 AM CDTFlash Flood WarningLSXCrawford, Gasconade4 hr
Jun 22, 5:41 AM CDTFlash Flood WarningLSXBoone3 hr
Jun 22, 7:05 AM CDTFlash Flood WarningLSXShelby4 hr
Jun 22, 7:36 AM CDTFlash Flood WarningLSXKnox3 hr

Nearby

Flash Flood Warnings in Missouri, 1997Every flash flood warning in 1997

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.