Alert archive / Missouri / Flash Flood Warnings in 2002

Flash Flood Warning 10, NWS St. Louis, MO

May 12, 2002Marion County, Missouri; Adams County, Illinois

NWS St. Louis, MO issued this flash flood warning at May 12, 2002, 1:50 AM CDT for Marion County, Missouri; Adams County, Illinois. 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
May 12, 2002, 1:50 AM CDT (06:50 UTC)
Expired
May 12, 2002, 7:45 AM CDT
In force
6 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

Counties Adams County, IL, Marion County, MO

The radar

The St Louis radar (KLSX), 147 km from the middle of the area, began a volume at 06:49 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

Davenport, (KDVN), launched 00:00Z, 6.8 hours before the alert went out and 206 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, Davenport, at 00:00Z on 2002-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 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, Davenport, at 00:00Z on 2002-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 556 square meters per square second.1939587897Sfc1 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
424 m above ground
0-6 km bulk shear
80 kt
0-1 km storm-relative helicity
556 m²/s²
0-3 km storm-relative helicity
666 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.6

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLSX 120650
FFWSTL
ILC001-MOC127-121245-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
140 AM CDT SUN MAY 12 2002

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MARION COUNTY IN NORTHEAST MISSOURI
  ADAMS COUNTY IN WEST CENTRAL ILLINOIS

* UNTIL 745 AM CDT

* AT 140 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED AN EAST TO 
WEST LINE OF THUNDERSTORMS PRODUCING VERY HEAVY RAIN EXTENDING FROM
20 MILES NORTH OF QUINCY TO MACON AND WEST TO CHILLICOTHE MISSOURI. 
THESE STORMS WERE MOVING TO THE EAST AT 35 MPH. 

KIRKSVILLE REPORTED 4.02 INCHES OF RAINFALL BETWEEN 700 AM AND 100 AM
AS THE STORMS PASSED THROUGH THERE. SINCE SOME AREAS WILL BE IN THE 
PATH OF SUCESSIVE STORMS PASSING THROUGH THE SAME AREA THE RAINFALL 
AMOUNTS COULD BE EXCESSIVE. YOU CAN EXPECT 1 TO 3 INCHES OF 
RAINFALL...LOCALLY MORE OVERNIGHT TONIGHT.

PERSONS IN OR NEAR LOW WATER OR FLOOD PRONE AREAS SHOULD MOVE TO 
HIGHER TERRAIN IMMEDIATELY. 

THE MIDDLE FABIUS...SOUTH FABIUS...AND NORTH RIVERS AND OTHER 
STREAMS AND TRIBUTARIES WILL EXPERIENCE RAPID AND DANGEROUS RISES
THROUGH THE MORNING HOURS. 

IF FLASH FLOODING IS OBSERVED OR IMMINENT...MOVE QUICKLY TO HIGHER 
GROUND. NEVER DRIVE INTO AN AREA WHERE WATER COVERS THE ROAD.

MOST FATALITIES FROM FLASH FLOODING OCCURS AT NIGHT. KEEP SAFE AND 
HELP YOUR NEIGHBORS KEEP SAFE.

PEDIGO

The office that day

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

IssuedProductOfficeCountiesLasted
May 11, 10:03 PM CDTSevere Thunderstorm WarningLSX42 min
May 11, 11:18 PM CDTFlash Flood WarningLSXKnox6 hr
May 12, 1:15 AM CDTFlash Flood WarningLSXLewis, Shelby6 hr
May 12, 4:50 AM CDTFlash Flood WarningLSXLincoln, Saint Charles, Warren6 hr
May 12, 1:06 PM CDTSevere Thunderstorm WarningLSX39 min
May 12, 1:40 PM CDTSevere Thunderstorm WarningLSX35 min
May 12, 2:00 PM CDTSevere Thunderstorm WarningLSX45 min
May 12, 2:04 PM CDTSevere Thunderstorm WarningLSX26 min
May 12, 2:24 PM CDTSevere Thunderstorm WarningLSX51 min
May 12, 2:41 PM CDTSevere Thunderstorm WarningLSX49 min
May 12, 3:39 PM CDTSevere Thunderstorm WarningLSX51 min
May 12, 4:29 PM CDTFlash Flood WarningLSXSaint Charles, Saint Louis6 hr
May 12, 5:02 PM CDTSevere Thunderstorm WarningLSX28 min
May 12, 5:17 PM CDTSevere Thunderstorm WarningLSX28 min
May 12, 5:36 PM CDTSevere Thunderstorm WarningLSX24 min
May 12, 6:00 PM CDTSevere Thunderstorm WarningLSX45 min
May 12, 6:07 PM CDTTornado WarningLSXSainte Genevieve, Saint Francois, Washington38 min
May 12, 6:16 PM CDTSevere Thunderstorm WarningLSX44 min
May 12, 6:44 PM CDTTornado WarningLSXSainte Genevieve46 min
May 12, 5:09 PM CDTFlash Flood WarningLSXFayette5 hr

Nearby

Flash Flood Warnings in Missouri, 2002Flash Flood Warnings in Illinois, 2002Every flash flood warning in 2002

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.