Alert archive / Missouri / Flash Flood Warnings in 1996

Flash Flood Warning 40, NWS Kansas City, MO

July 20, 1996Lafayette County, Missouri

NWS Kansas City, MO issued this flash flood warning at Jul 20, 1996, 10:58 PM CDT for Lafayette County, Missouri. It was in force for 4 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
Jul 20, 1996, 10:58 PM CDT (03:58 UTC)
Expired
Jul 21, 1996, 3:00 AM CDT
In force
4 hr
Issued by
NWS Kansas City, MO
Area
Whole counties

County Lafayette County, MO

The radar

The Pleasant Hill radar (KEAX), 50 km from the middle of the area, began a volume at 03:58 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, 4.0 hours before the alert went out and 160 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 1996-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3392 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, Topeka, KS at 00:00Z on 1996-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.193958Sfc1 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
3392 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1402 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
118 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 210359
FFWMCI
MOC107-210800-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO
1058 PM CDT SAT JUL 20 1996

* FLASH FLOOD WARNING FOR
  LAFAYETTE COUNTY - WEST CENTRAL MISSOURI

* UNTIL 300 AM CDT
 
* SOME STREAMS AND RIVERS AFFECTED
    DAVIS CREEK
    TABO CREEK
    SNI-A-BAR CREEK

* CAUSE AND EFFECT
    THUNDERSTORMS HAVE DROPPED 2 TO 4 INCHES OF RAIN ACROSS THE
    COUNTY THIS EVENING AND THUNDERSTORMS CONTINUE OVER THE COUNTY
    AT 1055 PM. ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES IS
    LIKELY THROUGH 1 AM...INCREASING THE THREAT OF FLASH
    FLOODING.

* FORECAST CONDITIONS
    RAPID RISES ON STREAMS AND CREEKS IS LIKELY. IN ADDITION...PEOPLE
    TRAVELLING ON INTERSTATE 70 BETWEEN MILE MARKERS 28 AND 62...AND
    ROUTE 24 SHOULD REMAIN ALERT TO WATER OVER ROADS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGER OF FLOODING.

BUNTING
 
v

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 Jul 20, 3:37 PM CDT, 7 hours 21 minutes earlier.

Area forecast discussion, Jul 20, 3:37 PM CDT, 7 hours 21 minutes before
NORTHWEST MISSOURI FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO
338 PM CDT SAT JUL 20 1996

SHORT TERM PROBLEM WL BE TRW RDVLPMT LT THIS AFTN INTO TNGT AS FNTL
BNDRY RMNS NRLY E CNTRL KS INTO CNTRL MO WITH MID/UPR LEVEL VORT MOVG
INTO WRN ARND 06Z...THEN THRU RMNDR OF CWA SUN MRNG.  MEANWHILE...LGT
TO MDT RW/TRW CONTG VCNTY OF ELEVATD BNDRY IN FAR NRN MO.

LATEST ADAP SHOWG MSTR CNVGNC MAX IN NE KS WITH AXIS EXTG FM NRN MO
SWWD INTO S CNTRL KS.  XPC RPD DVLPMT IN ERN KS\WRN MO BY ERY EVE...
WITH ACTVTY MOVG EWD AND ENDG BHND VORT.  FFG GEN IN THE 2.5-3.5 RNG
WITH HIER AMNTS IN SW PART OF CWA.  RNFALL AMNTS SINCE 12Z IN FAR N
FM ARND .5 MOST AREAS TO 1.5 IN ATCHISON COUNTY MO.  PER DISSCUSION
WITH STL...WL INCLUDE ENTR CWA IN FFA TNGT...THO KS PORTIONS OF KC
METRO AREA INTO SW CWA BORDERLINE.

BNDRY LIFTS NE OUT OF AREA SUN INTO SUN EVE WITH ANOTHER CDFNT APPCHG
NW MO BY MON MRNG...MOVG THRU AREA ON MON.  WL ADD SCT POPS FAR NW LT
SUN NGT AND OVR ENTR CWA MON.

MCI BB 071/087 070/087 067 7-13

DJV

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 10:36 PM CDTFlash Flood WarningEAXClay4 hr
Jul 20, 11:04 PM CDTFlash Flood WarningEAXRay4 hr
Jul 20, 11:16 PM CDTFlash Flood WarningEAXJohnson4 hr
Jul 20, 11:23 PM CDTFlash Flood WarningEAXPettis4 hr
Jul 21, 2:50 AM CDTFlash Flood WarningEAXJohnson, Pettis3 hr
Jul 21, 2:50 AM CDTFlash Flood WarningEAXJohnson, Pettis3 hr

Nearby

Flash Flood Warnings in Missouri, 1996Every flash flood warning in 1996

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.