Alert archive / Kansas / Flash Flood Warnings in 1986

Flash Flood Warning 7, NWS Kansas City, MO

September 18, 1986Johnson County, Wyandotte County, Kansas; Jackson County, Missouri

NWS Kansas City, MO issued this flash flood warning at Sep 18, 1986, 3:40 AM CDT for Johnson County, Wyandotte County, Kansas; Jackson County, Missouri. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Sep 18, 1986, 3:40 AM CDT (08:40 UTC)
Expired
Sep 18, 1986, 8:00 AM CDT
In force
4 hr
Issued by
NWS Kansas City, MO
Area
Whole counties

Counties Johnson County, KS, Wyandotte County, KS, Jackson County, MO

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 8.7 hours before the alert went out and 86 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 1986-09-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2410 joules per kilogram.LCLLFCEL10008507005003002001001 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, Topeka, KS at 00:00Z on 1986-09-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
2410 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
880 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
105 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMCI 180840
FFWMCI
MOC095-KSC091-209-181300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE KANSAS CITY INT'L AIRPORT MO
340 AM CDT THU SEP 18 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING 
EFFECTIVE UNTIL 800 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

WEST CENTRAL MISSOURI...WESTERN JACKSON
EAST CENTRAL KANSAS...NORTHERN JOHNSON AND SOUTHERN WYANDOTTE

AT 330  AM CDT HEAVY RAIN CONTINUED OVER PORTIONS OF THE
WARNED COUNTIES.  THIS HEAVY RAINFALL WILL CONTINUE FOR THE
NEXT 2 HOURS AND FLOODING AND FLASH FLOODING WILL CONTINUE UNTIL
AFTER SUNRISE.

BE ALERT FOR RAPIDLY RISING WATER.  STAY AWAY FROM FLOODING CREEKS..
STREAMS AND STORM DRAINS.  DO NOT ATTEMPT TO WALK OR DRIVE THROUGH
FLOWING WATER.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY.

 BRUSH CREEK AT THE COUNTRY CLUB PLAZA IS NOW FLOODING.  WITH
 PRESENT ESTIMATES OF RAINFALL IT IS EXPECTED THAT BRUSH CK WILL
 RISE TO ABOUT 5 FEET ABOVE FLOOD STAGE AND THIS SHOULD OCCUR
 ABOUT SUNRISE.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 18, 12:32 AM CDTSevere Thunderstorm WarningEAXJohnson28 min
Sep 18, 2:02 AM CDTFlash Flood WarningEAXJohnson, Wyandotte118 min
Sep 18, 3:15 AM CDTFlash Flood WarningEAXJohnson8 hr
Sep 18, 2:47 AM CDTFlash Flood WarningEAXCooper, Moniteau, Morgan, Pettis4 hr

Nearby

Flash Flood Warnings in Kansas, 1986Flash Flood Warnings in Missouri, 1986Every flash flood warning in 1986

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.