Alert archive / Missouri / Flash Flood Warnings in 2002

Flash Flood Warning 10, NWS Kansas City, MO

May 11, 2002Linn County, Missouri

NWS Kansas City, MO issued this flash flood warning at May 11, 2002, 9:55 PM CDT for Linn 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 outline as issued.

The facts

Issued: May 11, 2002, 9:55 PM CDT (02:55 UTC)
Expired: May 12, 2002, 3:45 AM CDT
In force: 6 hr
Issued by: NWS Kansas City, MO
Area: Counties, with a storm outline in the text

County Linn County, MO

The radar

The Pleasant Hill radar (KEAX), 160 km from the middle of the area, began a volume at 03:02 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, 2.9 hours before the alert went out and 243 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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 120255
FFWMCI
MOC115-120845-

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

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  LINN COUNTY IN NORTH CENTRAL MISSOURI

* UNTIL 345 AM CDT

* AT 943 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH VERY HEAVY RAINFALL ALONG A LINE EXTENDING 
  FROM PURDIN TO SUMNER...MOVING EAST AT 20 MPH.  THE COOPERATIVE
  OBSERVER AT BROOKFIELD REPORTED 1.28 INCHES HAD FALLEN FROM THE
  CURRENT STORMS. HIGHWAY 11 SOUTH OF BROOKFIELD HAS BEEN CLOSED 
  DUE TO HIGH WATER.

* 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...ON THE FOLLOWING STREAMS
  AND CREEKS...

  PARSON CREEK...LOCUST CREEK...MUDDY CREEK...LONG BRANCH...EAST AND 
  WEST YELLOW CREEK...ELK CREEK. 

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...SHELBY...
PURDIN...NEW BOSTON...MEADVILLE...LINNEUS...BUCKLIN AND BROOKFIELD.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

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.

LAT...LON 4003 9286 3971 9287 3972 9335 4003 9336

PC

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 7:51 PM CDT	Flash Flood Warning	EAX	Cass, Jackson	6 hr
May 11, 8:16 PM CDT	Flash Flood Warning	EAX	Johnson, Lafayette	6 hr
May 12, 12:45 AM CDT	Flash Flood Warning	EAX	Adair, Macon	4 hr
May 12, 12:55 AM CDT	Flash Flood Warning	EAX	Carroll	4 hr
May 12, 1:01 AM CDT	Flash Flood Warning	EAX	Chariton	4 hr
May 12, 12:42 PM CDT	Severe Thunderstorm Warning	EAX	Cooper	63 min
May 12, 5:06 PM CDT	Severe Thunderstorm Warning	EAX	Bates	39 min
May 12, 6:32 PM CDT	Severe Thunderstorm Warning	EAX	Jackson	28 min
May 12, 6:42 PM CDT	Severe Thunderstorm Warning	EAX	Lafayette	63 min

Nearby

Flash Flood Warnings in Missouri, 2002 Every 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.