Alert archive / Missouri / Flash Flood Warnings in 2002

Flash Flood Warning 8, NWS Kansas City, MO

May 11, 2002Cass County, Jackson County, Missouri; Johnson County, Miami County, Kansas

NWS Kansas City, MO issued this flash flood warning at May 11, 2002, 7:51 PM CDT for Cass County, Jackson County, Missouri; Johnson County, Miami County, Kansas. 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 11, 2002, 7:51 PM CDT (00:51 UTC)
Expired
May 12, 2002, 1:45 AM CDT
In force
6 hr
Issued by
NWS Kansas City, MO
Area
Whole counties

Counties Johnson County, KS, Miami County, KS, Cass County, MO, Jackson County, MO

The radar

The Pleasant Hill radar (KEAX), 28 km from the middle of the area, began a volume at 00:53 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

Topeka, KS (KTOP), launched 00:00Z, 0.9 hours before the alert went out and 94 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, Topeka, KS at 00:00Z on 2002-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2385 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, Topeka, KS at 00:00Z on 2002-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 244 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
2385 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
742 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
244 m²/s²
0-3 km storm-relative helicity
217 m²/s²
Significant tornado parameter
3.4
Supercell composite
11.2

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KEAX 120051
FFWMCI
KSC091-121-MOC037-095-120645-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
748 PM CDT SAT MAY 11 2002

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  JOHNSON COUNTY IN EAST CENTRAL KANSAS
  NORTHERN MIAMI COUNTY IN EAST CENTRAL KANSAS
  NORTHWESTERN CASS COUNTY IN WEST CENTRAL MISSOURI
  JACKSON COUNTY IN WEST CENTRAL MISSOURI

* UNTIL 145 AM CDT

* AT 743 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH VERY HEAVY RAINFALL ALONG A LINE FROM NEAR 
  OSAWATOMIE TO STANLEY...NORTHEAST TO NEAR BLUE SPRINGS. THESE 
  STORMS ARE MOVING TO THE NORTHEAST AT 20 MPH. 1.2 INCHES OF 
  RAINFALL WAS REPORTED IN LEES SUMMIT BETWEEN 715 PM AND 745 PM.

* SLOW MOVING THUNDERSTORMS ARE PRODUCING TORRENTIAL RAINFALL IN THE
  WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL LEAD TO RAPID
  RISES...AND THE THREAT OF FLASH FLOODING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...KANSAS CITY...
PAOLA...OLATHE...RAYTOWN...RAYMORE...LEES SUMMIT...LAKE LOTAWANA...
INDEPENDENCE...GREENWOOD...GRANDVIEW...GRAIN VALLEY AND BUCKNER.

ADDITIONAL RAINFALL AMOUNTS OF ONE TO THREE INCHES ARE POSSIBLE IN 
THE WARNED AREA.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
PLEASANT HILL.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY.

The office that day

Everything else NWS Kansas City, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 11, 8:16 PM CDTFlash Flood WarningEAXJohnson, Lafayette6 hr
May 11, 9:55 PM CDTFlash Flood WarningEAXLinn6 hr
May 12, 12:45 AM CDTFlash Flood WarningEAXAdair, Macon4 hr
May 12, 12:55 AM CDTFlash Flood WarningEAXCarroll4 hr
May 12, 1:01 AM CDTFlash Flood WarningEAXChariton4 hr
May 12, 12:42 PM CDTSevere Thunderstorm WarningEAXCooper63 min
May 12, 5:06 PM CDTSevere Thunderstorm WarningEAXBates39 min
May 12, 6:32 PM CDTSevere Thunderstorm WarningEAXJackson28 min
May 12, 6:42 PM CDTSevere Thunderstorm WarningEAXLafayette63 min
May 12, 4:31 PM CDTSevere Thunderstorm WarningEAXLinn44 min

Nearby

Flash Flood Warnings in Missouri, 2002Flash Flood Warnings in Kansas, 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.