Alert archive / Missouri / Flash Flood Warnings in 1998

Flash Flood Warning 57, NWS Kansas City, MO

October 17, 1998Johnson County, Missouri

NWS Kansas City, MO issued this flash flood warning at Oct 17, 1998, 10:09 PM CDT for Johnson 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 the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Oct 17, 1998, 10:09 PM CDT (03:09 UTC)
Expired: Oct 18, 1998, 4:00 AM CDT
In force: 6 hr
Issued by: NWS Kansas City, MO
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Johnson County, MO

The radar

The Pleasant Hill radar (KEAX), 34 km from the middle of the area, began a volume at 03:11 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, 3.2 hours before the alert went out and 155 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: 14 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1191 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: -76 m²/s²
0-3 km storm-relative helicity: 222 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMCI 180307
FFWMCI
MOC101-180900-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE KANSAS CITY-PLEASANT HILL MO
1009 PM CDT SAT OCT 17 1998

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* FLASH FLOOD WARNING FOR...
     JOHNSON COUNTY IN MISSOURI
     INCLUDING WARRENSBURG

* UNTIL 4 AM CDT

* AT 1007 PM...NUMEROUS ROADS AROUND THE COUNTY CONTINUED TO BE 
CLOSED DUE TO HIGH WATER. IN ADDITION...SW 800 AND 401 HAS BEEN 
WASHED OUT.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER
LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING.

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.

LAT...LON 3889 9410 3858 9410 3857 9353 3891 9354

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Kansas City, MO wrote its last area forecast discussion before this flash flood warning went out at Oct 17, 2:10 PM CDT, 7 hours 59 minutes earlier.

Area forecast discussion, Oct 17, 2:10 PM CDT, 7 hours 59 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
210 PM CDT SAT OCT 17 1998

ACTIVE WEATHER SCENARIO SETTING UP THIS AFTERNOON...SO WILL KEEP
THIS SHORT.  LINE OF THUNDERSTORMS INTENSIFYING THIS AFTERNOON ALONG
AND AHEAD OF APPROACHING FRONT...AND IN RRQ OF EXITING 100+ KT H3
JET.  PRECIPITATION THREAT TO CONTINUE INTO THE EVENING OVER MOST OF
CWA...SO WILL STAGGER POPS FROM WEST TO EAST...GOING CATEGORICAL IN
THE EAST.  CONCERNS FOR LOCALLY HEAVY RAINS THIS EVENING ACROSS MOST
OF CWA...BUT FEEL FRONT WILL ACCELERATE AND PUSH PRECIP OUT OF CWA
TOWARDS MIDNIGHT OR SHORTLY THEREAFTER.  WILL WORD CENTRAL AND
EASTERN ZONES WITH LOCAL HEAVY RAIN THREAT IN MIND...COORD STL.

REMAINDER OF FORECAST PACKAGE PRESENTS CHALLENGES WITH TEMPERATURES.
TRENDED TEMPERATURES UP A NOTCH IN MOST ZONES...MORE IN LINE WITH
FWC GUIDANCE AND WITH MODEL TRENDS.  NOT TOO OPTIMISTIC FOR PRECIP
CHANCES TUESDAY WITH APPROACHING CLIPPER SYSTEM...BUT WILL LEAVE FOR
NOW AND SEE HOW LATER RUNS PAN OUT.

.EAX...
MO...NONE.
KS...NONE.

HUDSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 17, 7:05 PM CDT	Flash Flood Warning	EAX	Johnson	3 hr

Nearby

Flash Flood Warnings in Missouri, 1998 Every flash flood warning in 1998

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.